de.robv.android.xposed.ClassLoaderSafeXposedHelper Maven / Gradle / Ivy
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package de.robv.android.xposed;
import android.content.res.AssetManager;
import android.content.res.Resources;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.zip.ZipFile;
import dalvik.system.DexFile;
import external.org.apache.commons.lang3.ClassUtils;
import external.org.apache.commons.lang3.reflect.MemberUtils;
/**
* 改造自原始xposed，如果系统中存在xposed框架，那么我们会和系统已存xposed交互。两分xposed的实现会引发classloader不一致冲突。这个工具类可以避免classloader不一致冲突问题
*/
public final class ClassLoaderSafeXposedHelper {
private ClassLoaderSafeXposedHelper() {
}
private static final HashMap> fieldCache = new HashMap<>();
private static final HashMap> methodCache = new HashMap<>();
private static final HashMap>> constructorCache = new HashMap<>();
/**
* Look up a class with the specified class loader.
*
* There are various allowed syntaxes for the class name, but it's recommended to use one of
* these:
*
* - {@code java.lang.String}
*
- {@code java.lang.String[]} (array)
*
- {@code android.app.ActivityThread.ResourcesKey}
*
- {@code android.app.ActivityThread$ResourcesKey}
*
*
* @param className The class name in one of the formats mentioned above.
* @param classLoader The class loader, or {@code null} for the boot class loader.
* @return A reference to the class.
* @throws ClassNotFoundError In case the class was not found.
*/
public static Class findClass(String className, ClassLoader classLoader) {
if (classLoader == null)
classLoader = XposedBridge.BOOTCLASSLOADER;
try {
return ClassUtils.getClass(classLoader, className, false);
} catch (ClassNotFoundException e) {
throw new ClassNotFoundError(e);
}
}
/**
* Look up and return a class if it exists.
* Like {@link #findClass}, but doesn't throw an exception if the class doesn't exist.
*
* @param className The class name.
* @param classLoader The class loader, or {@code null} for the boot class loader.
* @return A reference to the class, or {@code null} if it doesn't exist.
*/
public static Class findClassIfExists(String className, ClassLoader classLoader) {
try {
return findClass(className, classLoader);
} catch (ClassNotFoundError e) {
return null;
}
}
/**
* Look up a field in a class and set it to accessible.
*
* @param clazz The class which either declares or inherits the field.
* @param fieldName The field name.
* @return A reference to the field.
* @throws NoSuchFieldError In case the field was not found.
*/
public static Field findField(Class clazz, String fieldName) {
String fullFieldName = clazz.getName() + '#' + fieldName;
HashMap classLoaderFieldCache = fieldCache.get(clazz.getClassLoader());
if (classLoaderFieldCache == null) {
classLoaderFieldCache = new HashMap<>();
fieldCache.put(clazz.getClassLoader(), classLoaderFieldCache);
}
if (classLoaderFieldCache.containsKey(fullFieldName)) {
Field field = classLoaderFieldCache.get(fullFieldName);
if (field == null)
throw new NoSuchFieldError(fullFieldName);
return field;
}
try {
Field field = findFieldRecursiveImpl(clazz, fieldName);
field.setAccessible(true);
classLoaderFieldCache.put(fullFieldName, field);
return field;
} catch (NoSuchFieldException e) {
classLoaderFieldCache.put(fullFieldName, null);
throw new NoSuchFieldError(fullFieldName);
}
}
/**
* Look up and return a field if it exists.
* Like {@link #findField}, but doesn't throw an exception if the field doesn't exist.
*
* @param clazz The class which either declares or inherits the field.
* @param fieldName The field name.
* @return A reference to the field, or {@code null} if it doesn't exist.
*/
public static Field findFieldIfExists(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName);
} catch (NoSuchFieldError e) {
return null;
}
}
private static Field findFieldRecursiveImpl(Class clazz, String fieldName) throws NoSuchFieldException {
try {
return clazz.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
while (true) {
clazz = clazz.getSuperclass();
if (clazz == null || clazz.equals(Object.class))
break;
try {
return clazz.getDeclaredField(fieldName);
} catch (NoSuchFieldException ignored) {
}
}
throw e;
}
}
/**
* Returns the first field of the given type in a class.
* Might be useful for Proguard'ed classes to identify fields with unique types.
*
* @param clazz The class which either declares or inherits the field.
* @param type The type of the field.
* @return A reference to the first field of the given type.
* @throws NoSuchFieldError In case no matching field was not found.
*/
public static Field findFirstFieldByExactType(Class clazz, Class type) {
Class clz = clazz;
do {
for (Field field : clz.getDeclaredFields()) {
if (field.getType() == type) {
field.setAccessible(true);
return field;
}
}
} while ((clz = clz.getSuperclass()) != null);
throw new NoSuchFieldError("Field of type " + type.getName() + " in class " + clazz.getName());
}
/**
* Look up a method and hook it. See {@link #findAndHookMethod(String, ClassLoader, String, Object...)}
* for details.
*/
public static XC_MethodHook.Unhook findAndHookMethod(Class clazz, String methodName, Object... parameterTypesAndCallback) {
if (parameterTypesAndCallback.length == 0 || !(parameterTypesAndCallback[parameterTypesAndCallback.length - 1] instanceof XC_MethodHook))
throw new IllegalArgumentException("no callback defined");
XC_MethodHook callback = (XC_MethodHook) parameterTypesAndCallback[parameterTypesAndCallback.length - 1];
Method m = findMethodExact(clazz, methodName, getParameterClasses(clazz.getClassLoader(), parameterTypesAndCallback));
return XposedBridge.hookMethod(m, callback);
}
/**
* Look up a method and hook it. The last argument must be the callback for the hook.
*
* This combines calls to {@link #findMethodExact(Class, String, Object...)} and
* {@link XposedBridge#hookMethod}.
*
*
The method must be declared or overridden in the given class, inherited
* methods are not considered! That's because each method implementation exists only once in
* the memory, and when classes inherit it, they just get another reference to the implementation.
* Hooking a method therefore applies to all classes inheriting the same implementation. You
* have to expect that the hook applies to subclasses (unless they override the method), but you
* shouldn't have to worry about hooks applying to superclasses, hence this "limitation".
* There could be undesired or even dangerous hooks otherwise, e.g. if you hook
* {@code SomeClass.equals()} and that class doesn't override the {@code equals()} on some ROMs,
* making you hook {@code Object.equals()} instead.
*
*
There are two ways to specify the parameter types. If you already have a reference to the
* {@link Class}, use that. For Android framework classes, you can often use something like
* {@code String.class}. If you don't have the class reference, you can simply use the
* full class name as a string, e.g. {@code java.lang.String} or {@code com.example.MyClass}.
* It will be passed to {@link #findClass} with the same class loader that is used for the target
* method, see its documentation for the allowed notations.
*
*
Primitive types, such as {@code int}, can be specified using {@code int.class} (recommended)
* or {@code Integer.TYPE}. Note that {@code Integer.class} doesn't refer to {@code int} but to
* {@code Integer}, which is a normal class (boxed primitive). Therefore it must not be used when
* the method expects an {@code int} parameter - it has to be used for {@code Integer} parameters
* though, so check the method signature in detail.
*
*
As last argument to this method (after the list of target method parameters), you need
* to specify the callback that should be executed when the method is invoked. It's usually
* an anonymous subclass of {@link XC_MethodHook} or {@link XC_MethodReplacement}.
*
*
Example
*
* // In order to hook this method ...
* package com.example;
* public class SomeClass {
* public int doSomething(String s, int i, MyClass m) {
* ...
* }
* }
*
* // ... you can use this call:
* findAndHookMethod("com.example.SomeClass", lpparam.classLoader, String.class, int.class, "com.example.MyClass", new XC_MethodHook() {
* @Override
* protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
* String oldText = (String) param.args[0];
* Log.d("MyModule", oldText);
*
* param.args[0] = "test";
* param.args[1] = 42; // auto-boxing is working here
* setBooleanField(param.args[2], "great", true);
*
* // This would not work (as MyClass can't be resolved at compile time):
* // MyClass myClass = (MyClass) param.args[2];
* // myClass.great = true;
* }
* });
*
*
* @param className The name of the class which implements the method.
* @param classLoader The class loader for resolving the target and parameter classes.
* @param methodName The target method name.
* @param parameterTypesAndCallback The parameter types of the target method, plus the callback.
* @return An object which can be used to remove the callback again.
* @throws NoSuchMethodError In case the method was not found.
* @throws ClassNotFoundError In case the target class or one of the parameter types couldn't be resolved.
*/
public static XC_MethodHook.Unhook findAndHookMethod(String className, ClassLoader classLoader, String methodName, Object... parameterTypesAndCallback) {
return findAndHookMethod(findClass(className, classLoader), methodName, parameterTypesAndCallback);
}
/**
* Look up a method in a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Method findMethodExact(Class clazz, String methodName, Object... parameterTypes) {
return findMethodExact(clazz, methodName, getParameterClasses(clazz.getClassLoader(), parameterTypes));
}
/**
* Look up and return a method if it exists.
* See {@link #findMethodExactIfExists(String, ClassLoader, String, Object...)} for details.
*/
public static Method findMethodExactIfExists(Class clazz, String methodName, Object... parameterTypes) {
try {
return findMethodExact(clazz, methodName, parameterTypes);
} catch (ClassNotFoundError | NoSuchMethodError e) {
return null;
}
}
/**
* Look up a method in a class and set it to accessible.
* The method must be declared or overridden in the given class.
*
* See {@link #findAndHookMethod(String, ClassLoader, String, Object...)} for details about
* the method and parameter type resolution.
*
* @param className The name of the class which implements the method.
* @param classLoader The class loader for resolving the target and parameter classes.
* @param methodName The target method name.
* @param parameterTypes The parameter types of the target method.
* @return A reference to the method.
* @throws NoSuchMethodError In case the method was not found.
* @throws ClassNotFoundError In case the target class or one of the parameter types couldn't be resolved.
*/
public static Method findMethodExact(String className, ClassLoader classLoader, String methodName, Object... parameterTypes) {
return findMethodExact(findClass(className, classLoader), methodName, getParameterClasses(classLoader, parameterTypes));
}
/**
* Look up and return a method if it exists.
* Like {@link #findMethodExact(String, ClassLoader, String, Object...)}, but doesn't throw an
* exception if the method doesn't exist.
*
* @param className The name of the class which implements the method.
* @param classLoader The class loader for resolving the target and parameter classes.
* @param methodName The target method name.
* @param parameterTypes The parameter types of the target method.
* @return A reference to the method, or {@code null} if it doesn't exist.
*/
public static Method findMethodExactIfExists(String className, ClassLoader classLoader, String methodName, Object... parameterTypes) {
try {
return findMethodExact(className, classLoader, methodName, parameterTypes);
} catch (ClassNotFoundError | NoSuchMethodError e) {
return null;
}
}
/**
* Look up a method in a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*
*
This variant requires that you already have reference to all the parameter types.
*/
public synchronized static Method findMethodExact(Class clazz, String methodName, Class... parameterTypes) {
String fullMethodName = clazz.getName() + '#' + methodName + getParametersString(parameterTypes) + "#exact";
HashMap classLoaderMethodCache = methodCache.get(clazz.getClassLoader());
if (classLoaderMethodCache == null) {
classLoaderMethodCache = new HashMap<>();
methodCache.put(clazz.getClassLoader(), classLoaderMethodCache);
}
if (classLoaderMethodCache.containsKey(fullMethodName)) {
Method method = classLoaderMethodCache.get(fullMethodName);
if (method == null)
throw new NoSuchMethodError(fullMethodName);
return method;
}
try {
Method method = clazz.getDeclaredMethod(methodName, parameterTypes);
method.setAccessible(true);
classLoaderMethodCache.put(fullMethodName, method);
return method;
} catch (NoSuchMethodException e) {
classLoaderMethodCache.put(fullMethodName, null);
throw new NoSuchMethodError(fullMethodName);
}
}
/**
* Returns an array of all methods declared/overridden in a class with the specified parameter types.
*
* The return type is optional, it will not be compared if it is {@code null}.
* Use {@code void.class} if you want to search for methods returning nothing.
*
* @param clazz The class to look in.
* @param returnType The return type, or {@code null} (see above).
* @param parameterTypes The parameter types.
* @return An array with matching methods, all set to accessible already.
*/
public static Method[] findMethodsByExactParameters(Class clazz, Class returnType, Class... parameterTypes) {
List result = new LinkedList<>();
for (Method method : clazz.getDeclaredMethods()) {
if (returnType != null && returnType != method.getReturnType())
continue;
Class[] methodParameterTypes = method.getParameterTypes();
if (parameterTypes.length != methodParameterTypes.length)
continue;
boolean match = true;
for (int i = 0; i < parameterTypes.length; i++) {
if (parameterTypes[i] != methodParameterTypes[i]) {
match = false;
break;
}
}
if (!match)
continue;
method.setAccessible(true);
result.add(method);
}
return result.toArray(new Method[result.size()]);
}
/**
* Look up a method in a class and set it to accessible.
*
* This does'nt only look for exact matches, but for the best match. All considered candidates
* must be compatible with the given parameter types, i.e. the parameters must be assignable
* to the method's formal parameters. Inherited methods are considered here.
*
* @param clazz The class which declares, inherits or overrides the method.
* @param methodName The method name.
* @param parameterTypes The types of the method's parameters.
* @return A reference to the best-matching method.
* @throws NoSuchMethodError In case no suitable method was found.
*/
public synchronized static Method findMethodBestMatch(Class clazz, String methodName, Class... parameterTypes) {
String fullMethodName = clazz.getName() + '#' + methodName + getParametersString(parameterTypes) + "#bestmatch";
HashMap classLoaderMethodCache = methodCache.get(clazz.getClassLoader());
if (classLoaderMethodCache == null) {
classLoaderMethodCache = new HashMap<>();
methodCache.put(clazz.getClassLoader(), classLoaderMethodCache);
}
if (classLoaderMethodCache.containsKey(fullMethodName)) {
Method method = classLoaderMethodCache.get(fullMethodName);
if (method == null)
throw new NoSuchMethodError(fullMethodName);
return method;
}
try {
Method method = findMethodExact(clazz, methodName, parameterTypes);
classLoaderMethodCache.put(fullMethodName, method);
return method;
} catch (NoSuchMethodError ignored) {
}
Method bestMatch = null;
Class clz = clazz;
boolean considerPrivateMethods = true;
do {
for (Method method : clz.getDeclaredMethods()) {
// don't consider private methods of superclasses
if (!considerPrivateMethods && Modifier.isPrivate(method.getModifiers()))
continue;
// compare name and parameters
if (method.getName().equals(methodName) && ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
// get accessible version of method
if (bestMatch == null || MemberUtils.compareParameterTypes(
method.getParameterTypes(),
bestMatch.getParameterTypes(),
parameterTypes) < 0) {
bestMatch = method;
}
}
}
considerPrivateMethods = false;
} while ((clz = clz.getSuperclass()) != null);
if (bestMatch != null) {
bestMatch.setAccessible(true);
classLoaderMethodCache.put(fullMethodName, bestMatch);
return bestMatch;
} else {
NoSuchMethodError e = new NoSuchMethodError(fullMethodName);
classLoaderMethodCache.put(fullMethodName, null);
throw e;
}
}
/**
* Look up a method in a class and set it to accessible.
*
* See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects.
*/
public static Method findMethodBestMatch(Class clazz, String methodName, Object... args) {
return findMethodBestMatch(clazz, methodName, getParameterTypes(args));
}
/**
* Look up a method in a class and set it to accessible.
*
*
See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects. For any item that is
* {@code null}, the type is taken from {@code parameterTypes} instead.
*/
public static Method findMethodBestMatch(Class clazz, String methodName, Class[] parameterTypes, Object[] args) {
Class[] argsClasses = null;
for (int i = 0; i < parameterTypes.length; i++) {
if (parameterTypes[i] != null)
continue;
if (argsClasses == null)
argsClasses = getParameterTypes(args);
parameterTypes[i] = argsClasses[i];
}
return findMethodBestMatch(clazz, methodName, parameterTypes);
}
/**
* Returns an array with the classes of the given objects.
*/
public static Class[] getParameterTypes(Object... args) {
Class[] clazzes = new Class[args.length];
for (int i = 0; i < args.length; i++) {
clazzes[i] = (args[i] != null) ? args[i].getClass() : null;
}
return clazzes;
}
/**
* Retrieve classes from an array, where each element might either be a Class
* already, or a String with the full class name.
*/
private static Class[] getParameterClasses(ClassLoader classLoader, Object[] parameterTypesAndCallback) {
Class[] parameterClasses = null;
for (int i = parameterTypesAndCallback.length - 1; i >= 0; i--) {
Object type = parameterTypesAndCallback[i];
if (type == null)
throw new ClassNotFoundError("parameter type must not be null", null);
// ignore trailing callback
if (type instanceof XC_MethodHook)
continue;
if (parameterClasses == null)
parameterClasses = new Class[i + 1];
if (type instanceof Class)
parameterClasses[i] = (Class) type;
else if (type instanceof String)
parameterClasses[i] = findClass((String) type, classLoader);
else
throw new ClassNotFoundError("parameter type must either be specified as Class or String", null);
}
// if there are no arguments for the method
if (parameterClasses == null)
parameterClasses = new Class[0];
return parameterClasses;
}
/**
* Returns an array of the given classes.
*/
public static Class[] getClassesAsArray(Class... clazzes) {
return clazzes;
}
private static String getParametersString(Class... clazzes) {
StringBuilder sb = new StringBuilder("(");
boolean first = true;
for (Class clazz : clazzes) {
if (first)
first = false;
else
sb.append(",");
if (clazz != null)
sb.append(clazz.getCanonicalName());
else
sb.append("null");
}
sb.append(")");
return sb.toString();
}
/**
* Look up a constructor of a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor findConstructorExact(Class clazz, Object... parameterTypes) {
return findConstructorExact(clazz, getParameterClasses(clazz.getClassLoader(), parameterTypes));
}
/**
* Look up and return a constructor if it exists.
* See {@link #findMethodExactIfExists(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor findConstructorExactIfExists(Class clazz, Object... parameterTypes) {
try {
return findConstructorExact(clazz, parameterTypes);
} catch (ClassNotFoundError | NoSuchMethodError e) {
return null;
}
}
/**
* Look up a constructor of a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor findConstructorExact(String className, ClassLoader classLoader, Object... parameterTypes) {
return findConstructorExact(findClass(className, classLoader), getParameterClasses(classLoader, parameterTypes));
}
/**
* Look up and return a constructor if it exists.
* See {@link #findMethodExactIfExists(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor findConstructorExactIfExists(String className, ClassLoader classLoader, Object... parameterTypes) {
try {
return findConstructorExact(className, classLoader, parameterTypes);
} catch (ClassNotFoundError | NoSuchMethodError e) {
return null;
}
}
/**
* Look up a constructor of a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor findConstructorExact(Class clazz, Class... parameterTypes) {
String fullConstructorName = clazz.getName() + getParametersString(parameterTypes) + "#exact";
HashMap> classLoaderConstructorCache = constructorCache.get(clazz.getClassLoader());
if (classLoaderConstructorCache == null) {
classLoaderConstructorCache = new HashMap<>();
constructorCache.put(clazz.getClassLoader(), classLoaderConstructorCache);
}
if (classLoaderConstructorCache.containsKey(fullConstructorName)) {
Constructor constructor = classLoaderConstructorCache.get(fullConstructorName);
if (constructor == null)
throw new NoSuchMethodError(fullConstructorName);
return constructor;
}
try {
Constructor constructor = clazz.getDeclaredConstructor(parameterTypes);
constructor.setAccessible(true);
classLoaderConstructorCache.put(fullConstructorName, constructor);
return constructor;
} catch (NoSuchMethodException e) {
classLoaderConstructorCache.put(fullConstructorName, null);
throw new NoSuchMethodError(fullConstructorName);
}
}
/**
* Look up a constructor and hook it. See {@link #findAndHookMethod(String, ClassLoader, String, Object...)}
* for details.
*/
public static XC_MethodHook.Unhook findAndHookConstructor(Class clazz, Object... parameterTypesAndCallback) {
if (parameterTypesAndCallback.length == 0 || !(parameterTypesAndCallback[parameterTypesAndCallback.length - 1] instanceof XC_MethodHook))
throw new IllegalArgumentException("no callback defined");
XC_MethodHook callback = (XC_MethodHook) parameterTypesAndCallback[parameterTypesAndCallback.length - 1];
Constructor m = findConstructorExact(clazz, getParameterClasses(clazz.getClassLoader(), parameterTypesAndCallback));
return XposedBridge.hookMethod(m, callback);
}
/**
* Look up a constructor and hook it. See {@link #findAndHookMethod(String, ClassLoader, String, Object...)}
* for details.
*/
public static XC_MethodHook.Unhook findAndHookConstructor(String className, ClassLoader classLoader, Object... parameterTypesAndCallback) {
return findAndHookConstructor(findClass(className, classLoader), parameterTypesAndCallback);
}
/**
* Look up a constructor in a class and set it to accessible.
*
* See {@link #findMethodBestMatch(Class, String, Class...)} for details.
*/
public static Constructor findConstructorBestMatch(Class clazz, Class... parameterTypes) {
String fullConstructorName = clazz.getName() + getParametersString(parameterTypes) + "#bestmatch";
HashMap> classLoaderConstructorCache = constructorCache.get(clazz.getClassLoader());
if (classLoaderConstructorCache == null) {
classLoaderConstructorCache = new HashMap<>();
constructorCache.put(clazz.getClassLoader(), classLoaderConstructorCache);
}
if (classLoaderConstructorCache.containsKey(fullConstructorName)) {
Constructor constructor = classLoaderConstructorCache.get(fullConstructorName);
if (constructor == null)
throw new NoSuchMethodError(fullConstructorName);
return constructor;
}
try {
Constructor constructor = findConstructorExact(clazz, parameterTypes);
classLoaderConstructorCache.put(fullConstructorName, constructor);
return constructor;
} catch (NoSuchMethodError ignored) {
}
Constructor bestMatch = null;
Constructor[] constructors = clazz.getDeclaredConstructors();
for (Constructor constructor : constructors) {
// compare name and parameters
if (ClassUtils.isAssignable(parameterTypes, constructor.getParameterTypes(), true)) {
// get accessible version of method
if (bestMatch == null || MemberUtils.compareParameterTypes(
constructor.getParameterTypes(),
bestMatch.getParameterTypes(),
parameterTypes) < 0) {
bestMatch = constructor;
}
}
}
if (bestMatch != null) {
bestMatch.setAccessible(true);
classLoaderConstructorCache.put(fullConstructorName, bestMatch);
return bestMatch;
} else {
NoSuchMethodError e = new NoSuchMethodError(fullConstructorName);
classLoaderConstructorCache.put(fullConstructorName, null);
throw e;
}
}
/**
* Look up a constructor in a class and set it to accessible.
*
* See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects.
*/
public static Constructor findConstructorBestMatch(Class clazz, Object... args) {
return findConstructorBestMatch(clazz, getParameterTypes(args));
}
/**
* Look up a constructor in a class and set it to accessible.
*
*
See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects. For any item that is
* {@code null}, the type is taken from {@code parameterTypes} instead.
*/
public static Constructor findConstructorBestMatch(Class clazz, Class[] parameterTypes, Object[] args) {
Class[] argsClasses = null;
for (int i = 0; i < parameterTypes.length; i++) {
if (parameterTypes[i] != null)
continue;
if (argsClasses == null)
argsClasses = getParameterTypes(args);
parameterTypes[i] = argsClasses[i];
}
return findConstructorBestMatch(clazz, parameterTypes);
}
/**
* Thrown when a class loader is unable to find a class. Unlike {@link ClassNotFoundException},
* callers are not forced to explicitly catch this. If uncaught, the error will be passed to the
* next caller in the stack.
*/
public static final class ClassNotFoundError extends Error {
private static final long serialVersionUID = -1070936889459514628L;
/**
* @hide
*/
public ClassNotFoundError(Throwable cause) {
super(cause);
}
/**
* @hide
*/
public ClassNotFoundError(String detailMessage, Throwable cause) {
super(detailMessage, cause);
}
}
/**
* Returns the index of the first parameter declared with the given type.
*
* @throws NoSuchFieldError if there is no parameter with that type.
* @hide
*/
public static int getFirstParameterIndexByType(Member method, Class type) {
Class[] classes = (method instanceof Method) ?
((Method) method).getParameterTypes() : ((Constructor) method).getParameterTypes();
for (int i = 0; i < classes.length; i++) {
if (classes[i] == type) {
return i;
}
}
throw new NoSuchFieldError("No parameter of type " + type + " found in " + method);
}
/**
* Returns the index of the parameter declared with the given type, ensuring that there is exactly one such parameter.
*
* @throws NoSuchFieldError if there is no or more than one parameter with that type.
* @hide
*/
public static int getParameterIndexByType(Member method, Class type) {
Class[] classes = (method instanceof Method) ?
((Method) method).getParameterTypes() : ((Constructor) method).getParameterTypes();
int idx = -1;
for (int i = 0; i < classes.length; i++) {
if (classes[i] == type) {
if (idx == -1) {
idx = i;
} else {
throw new NoSuchFieldError("More than one parameter of type " + type + " found in " + method);
}
}
}
if (idx != -1) {
return idx;
} else {
throw new NoSuchFieldError("No parameter of type " + type + " found in " + method);
}
}
//#################################################################################################
/**
* Sets the value of an object field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setObjectField(Object obj, String fieldName, Object value) {
try {
findField(obj.getClass(), fieldName).set(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a {@code boolean} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setBooleanField(Object obj, String fieldName, boolean value) {
try {
findField(obj.getClass(), fieldName).setBoolean(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a {@code byte} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setByteField(Object obj, String fieldName, byte value) {
try {
findField(obj.getClass(), fieldName).setByte(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a {@code char} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setCharField(Object obj, String fieldName, char value) {
try {
findField(obj.getClass(), fieldName).setChar(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a {@code double} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setDoubleField(Object obj, String fieldName, double value) {
try {
findField(obj.getClass(), fieldName).setDouble(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a {@code float} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setFloatField(Object obj, String fieldName, float value) {
try {
findField(obj.getClass(), fieldName).setFloat(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of an {@code int} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setIntField(Object obj, String fieldName, int value) {
try {
findField(obj.getClass(), fieldName).setInt(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a {@code long} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setLongField(Object obj, String fieldName, long value) {
try {
findField(obj.getClass(), fieldName).setLong(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a {@code short} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static void setShortField(Object obj, String fieldName, short value) {
try {
findField(obj.getClass(), fieldName).setShort(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/**
* Returns the value of an object field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static Object getObjectField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).get(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* For inner classes, returns the surrounding instance, i.e. the {@code this} reference of the surrounding class.
*/
public static Object getSurroundingThis(Object obj) {
return getObjectField(obj, "this$0");
}
/**
* Returns the value of a {@code boolean} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
@SuppressWarnings("BooleanMethodIsAlwaysInverted")
public static boolean getBooleanField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getBoolean(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of a {@code byte} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static byte getByteField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getByte(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of a {@code char} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static char getCharField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getChar(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of a {@code double} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static double getDoubleField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getDouble(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of a {@code float} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static float getFloatField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getFloat(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of an {@code int} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static int getIntField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getInt(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of a {@code long} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static long getLongField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getLong(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of a {@code short} field in the given object instance. A class reference is not sufficient! See also {@link #findField}.
*/
public static short getShortField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getShort(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/**
* Sets the value of a static object field in the given class. See also {@link #findField}.
*/
public static void setStaticObjectField(Class clazz, String fieldName, Object value) {
try {
findField(clazz, fieldName).set(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code boolean} field in the given class. See also {@link #findField}.
*/
public static void setStaticBooleanField(Class clazz, String fieldName, boolean value) {
try {
findField(clazz, fieldName).setBoolean(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code byte} field in the given class. See also {@link #findField}.
*/
public static void setStaticByteField(Class clazz, String fieldName, byte value) {
try {
findField(clazz, fieldName).setByte(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code char} field in the given class. See also {@link #findField}.
*/
public static void setStaticCharField(Class clazz, String fieldName, char value) {
try {
findField(clazz, fieldName).setChar(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code double} field in the given class. See also {@link #findField}.
*/
public static void setStaticDoubleField(Class clazz, String fieldName, double value) {
try {
findField(clazz, fieldName).setDouble(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code float} field in the given class. See also {@link #findField}.
*/
public static void setStaticFloatField(Class clazz, String fieldName, float value) {
try {
findField(clazz, fieldName).setFloat(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code int} field in the given class. See also {@link #findField}.
*/
public static void setStaticIntField(Class clazz, String fieldName, int value) {
try {
findField(clazz, fieldName).setInt(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code long} field in the given class. See also {@link #findField}.
*/
public static void setStaticLongField(Class clazz, String fieldName, long value) {
try {
findField(clazz, fieldName).setLong(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code short} field in the given class. See also {@link #findField}.
*/
public static void setStaticShortField(Class clazz, String fieldName, short value) {
try {
findField(clazz, fieldName).setShort(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/**
* Returns the value of a static object field in the given class. See also {@link #findField}.
*/
public static Object getStaticObjectField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).get(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Returns the value of a static {@code boolean} field in the given class. See also {@link #findField}.
*/
public static boolean getStaticBooleanField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getBoolean(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code byte} field in the given class. See also {@link #findField}.
*/
public static byte getStaticByteField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getByte(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code char} field in the given class. See also {@link #findField}.
*/
public static char getStaticCharField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getChar(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code double} field in the given class. See also {@link #findField}.
*/
public static double getStaticDoubleField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getDouble(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code float} field in the given class. See also {@link #findField}.
*/
public static float getStaticFloatField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getFloat(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code int} field in the given class. See also {@link #findField}.
*/
public static int getStaticIntField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getInt(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code long} field in the given class. See also {@link #findField}.
*/
public static long getStaticLongField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getLong(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/**
* Sets the value of a static {@code short} field in the given class. See also {@link #findField}.
*/
public static short getStaticShortField(Class clazz, String fieldName) {
try {
return findField(clazz, fieldName).getShort(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/**
* Calls an instance or static method of the given object.
* The method is resolved using {@link #findMethodBestMatch(Class, String, Object...)}.
*
* @param obj The object instance. A class reference is not sufficient!
* @param methodName The method name.
* @param args The arguments for the method call.
* @throws NoSuchMethodError In case no suitable method was found.
* @throws InvocationTargetError In case an exception was thrown by the invoked method.
*/
public static Object callMethod(Object obj, String methodName, Object... args) {
try {
return findMethodBestMatch(obj.getClass(), methodName, args).invoke(obj, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* Calls an instance or static method of the given object.
* See {@link #callMethod(Object, String, Object...)}.
*
*
This variant allows you to specify parameter types, which can help in case there are multiple
* methods with the same name, especially if you call it with {@code null} parameters.
*/
public static Object callMethod(Object obj, String methodName, Class[] parameterTypes, Object... args) {
try {
return findMethodBestMatch(obj.getClass(), methodName, parameterTypes, args).invoke(obj, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* Calls a static method of the given class.
* The method is resolved using {@link #findMethodBestMatch(Class, String, Object...)}.
*
* @param clazz The class reference.
* @param methodName The method name.
* @param args The arguments for the method call.
* @throws NoSuchMethodError In case no suitable method was found.
* @throws InvocationTargetError In case an exception was thrown by the invoked method.
*/
public static Object callStaticMethod(Class clazz, String methodName, Object... args) {
try {
return findMethodBestMatch(clazz, methodName, args).invoke(null, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* Calls a static method of the given class.
* See {@link #callStaticMethod(Class, String, Object...)}.
*
*
This variant allows you to specify parameter types, which can help in case there are multiple
* methods with the same name, especially if you call it with {@code null} parameters.
*/
public static Object callStaticMethod(Class clazz, String methodName, Class[] parameterTypes, Object... args) {
try {
return findMethodBestMatch(clazz, methodName, parameterTypes, args).invoke(null, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* This class provides a wrapper for an exception thrown by a method invocation.
*
* @see #callMethod(Object, String, Object...)
* @see #callStaticMethod(Class, String, Object...)
* @see #newInstance(Class, Object...)
*/
public static final class InvocationTargetError extends Error {
private static final long serialVersionUID = -1070936889459514628L;
/**
* @hide
*/
public InvocationTargetError(Throwable cause) {
super(cause);
}
}
//#################################################################################################
/**
* Creates a new instance of the given class.
* The constructor is resolved using {@link #findConstructorBestMatch(Class, Object...)}.
*
* @param clazz The class reference.
* @param args The arguments for the constructor call.
* @throws NoSuchMethodError In case no suitable constructor was found.
* @throws InvocationTargetError In case an exception was thrown by the invoked method.
* @throws InstantiationError In case the class cannot be instantiated.
*/
public static Object newInstance(Class clazz, Object... args) {
try {
return findConstructorBestMatch(clazz, args).newInstance(args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
} catch (InstantiationException e) {
throw new InstantiationError(e.getMessage());
}
}
/**
* Creates a new instance of the given class.
* See {@link #newInstance(Class, Object...)}.
*
*
This variant allows you to specify parameter types, which can help in case there are multiple
* constructors with the same name, especially if you call it with {@code null} parameters.
*/
public static Object newInstance(Class clazz, Class[] parameterTypes, Object... args) {
try {
return findConstructorBestMatch(clazz, parameterTypes, args).newInstance(args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
} catch (InstantiationException e) {
throw new InstantiationError(e.getMessage());
}
}
//#################################################################################################
//#################################################################################################
/**
* Loads an asset from a resource object and returns the content as {@code byte} array.
*
* @param res The resources from which the asset should be loaded.
* @param path The path to the asset, as in {@link AssetManager#open}.
* @return The content of the asset.
*/
public static byte[] assetAsByteArray(Resources res, String path) throws IOException {
return inputStreamToByteArray(res.getAssets().open(path));
}
/*package*/
static byte[] inputStreamToByteArray(InputStream is) throws IOException {
ByteArrayOutputStream buf = new ByteArrayOutputStream();
byte[] temp = new byte[1024];
int read;
while ((read = is.read(temp)) > 0) {
buf.write(temp, 0, read);
}
is.close();
return buf.toByteArray();
}
/**
* Invokes the {@link Closeable#close()} method, ignoring IOExceptions.
*/
/*package*/
static void closeSilently(Closeable c) {
if (c != null) {
try {
c.close();
} catch (IOException ignored) {
}
}
}
/**
* Invokes the {@link DexFile#close()} method, ignoring IOExceptions.
*/
/*package*/
static void closeSilently(DexFile dexFile) {
if (dexFile != null) {
try {
dexFile.close();
} catch (IOException ignored) {
}
}
}
/**
* Invokes the {@link ZipFile#close()} method, ignoring IOExceptions.
*/
/*package*/
static void closeSilently(ZipFile zipFile) {
if (zipFile != null) {
try {
zipFile.close();
} catch (IOException ignored) {
}
}
}
/**
* Returns the lowercase hex string representation of a file's MD5 hash sum.
*/
public static String getMD5Sum(String file) throws IOException {
try {
MessageDigest digest = MessageDigest.getInstance("MD5");
InputStream is = new FileInputStream(file);
byte[] buffer = new byte[8192];
int read;
while ((read = is.read(buffer)) > 0) {
digest.update(buffer, 0, read);
}
is.close();
byte[] md5sum = digest.digest();
BigInteger bigInt = new BigInteger(1, md5sum);
return bigInt.toString(16);
} catch (NoSuchAlgorithmException e) {
return "";
}
}
//#################################################################################################
/*package*/
static boolean fileContains(File file, String str) throws IOException {
// There are certainly more efficient algorithms (e.g. Boyer-Moore used in grep),
// but the naive approach should be sufficient here.
BufferedReader in = null;
try {
in = new BufferedReader(new FileReader(file));
String line;
while ((line = in.readLine()) != null) {
if (line.contains(str)) {
return true;
}
}
return false;
} finally {
closeSilently(in);
}
}
//#################################################################################################
/**
* Returns the method that is overridden by the given method.
* It returns {@code null} if the method doesn't override another method or if that method is
* abstract, i.e. if this is the first implementation in the hierarchy.
*/
/*package*/
static Method getOverriddenMethod(Method method) {
int modifiers = method.getModifiers();
if (Modifier.isStatic(modifiers) || Modifier.isPrivate(modifiers)) {
return null;
}
String name = method.getName();
Class[] parameters = method.getParameterTypes();
Class clazz = method.getDeclaringClass().getSuperclass();
while (clazz != null) {
try {
Method superMethod = clazz.getDeclaredMethod(name, parameters);
modifiers = superMethod.getModifiers();
if (!Modifier.isPrivate(modifiers) && !Modifier.isAbstract(modifiers)) {
return superMethod;
} else {
return null;
}
} catch (NoSuchMethodException ignored) {
clazz = clazz.getSuperclass();
}
}
return null;
}
/**
* Returns all methods which this class overrides.
*/
/*package*/
static Set getOverriddenMethods(Class clazz) {
Set methods = new HashSet<>();
for (Method method : clazz.getDeclaredMethods()) {
Method overridden = getOverriddenMethod(method);
if (overridden != null) {
methods.add(overridden);
}
}
return methods;
}
//#################################################################################################
// TODO helpers for view traversing
/*To make it easier, I will try and implement some more helpers:
- add view before/after existing view (I already mentioned that I think)
- get index of view in its parent
- get next/previous sibling (maybe with an optional argument "type", that might be ImageView.class and gives you the next sibling that is an ImageView)?
- get next/previous element (similar to the above, but would also work if the next element has a different parent, it would just go up the hierarchy and then down again until it finds a matching element)
- find the first child that is an instance of a specified class
- find all (direct or indirect) children of a specified class
*/
}