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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.tools.lint.checks;
import static com.android.SdkConstants.ANDROID_URI;
import static com.android.SdkConstants.ATTR_NAME;
import static com.android.SdkConstants.TAG_ACTION;
import static com.android.SdkConstants.TAG_RECEIVER;
import com.android.annotations.NonNull;
import com.android.annotations.Nullable;
import com.android.tools.lint.detector.api.Category;
import com.android.tools.lint.detector.api.Detector.JavaPsiScanner;
import com.android.tools.lint.detector.api.Implementation;
import com.android.tools.lint.detector.api.Issue;
import com.android.tools.lint.detector.api.JavaContext;
import com.android.tools.lint.detector.api.ResourceXmlDetector;
import com.android.tools.lint.detector.api.Scope;
import com.android.tools.lint.detector.api.Severity;
import com.android.tools.lint.detector.api.XmlContext;
import com.intellij.psi.JavaElementVisitor;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiField;
import com.intellij.psi.PsiJavaCodeReferenceElement;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
/**
* Checks looking for issues that negatively affect battery life
*/
public class BatteryDetector extends ResourceXmlDetector implements
JavaPsiScanner {
@SuppressWarnings("unchecked")
public static final Implementation IMPLEMENTATION = new Implementation(
BatteryDetector.class,
EnumSet.of(Scope.MANIFEST, Scope.JAVA_FILE),
Scope.MANIFEST_SCOPE,
Scope.JAVA_FILE_SCOPE);
/** Issues that negatively affect battery life */
public static final Issue ISSUE = Issue.create(
"BatteryLife", //$NON-NLS-1$
"Battery Life Issues",
"This issue flags code that either\n" +
"* negatively affects battery life, or\n" +
"* uses APIs that have recently changed behavior to prevent background tasks " +
"from consuming memory and battery excessively.\n" +
"\n" +
"Generally, you should be using `JobScheduler` or `GcmNetworkManager` instead.\n" +
"\n" +
"For more details on how to update your code, please see" +
"http://developer.android.com/preview/features/background-optimization.html",
Category.CORRECTNESS,
5,
Severity.WARNING,
IMPLEMENTATION)
.addMoreInfo("http://developer.android.com/preview/features/background-optimization.html");
/** Constructs a new {@link BatteryDetector} */
public BatteryDetector() {
}
@Override
public Collection getApplicableElements() {
return Collections.singletonList(TAG_ACTION);
}
@Override
public void visitElement(@NonNull XmlContext context, @NonNull Element element) {
assert element.getTagName().equals(TAG_ACTION);
Attr attr = element.getAttributeNodeNS(ANDROID_URI, ATTR_NAME);
if (attr == null) {
return;
}
String name = attr.getValue();
if ("android.net.conn.CONNECTIVITY_CHANGE".equals(name)
&& element.getParentNode() != null
&& element.getParentNode().getParentNode() != null
&& TAG_RECEIVER.equals(element.getParentNode().getParentNode().getNodeName())
&& context.getMainProject().getTargetSdkVersion().getFeatureLevel() >= 24) {
String message = "Declaring a broadcastreceiver for "
+ "`android.net.conn.CONNECTIVITY_CHANGE` is deprecated for apps targeting "
+ "N and higher. In general, apps should not rely on this broadcast and "
+ "instead use `JobScheduler` or `GCMNetworkManager`.";
context.report(ISSUE, element, context.getValueLocation(attr), message);
}
if ("android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS".equals(name)
&& context.getMainProject().getTargetSdkVersion().getFeatureLevel() >= 23) {
String message = getBatteryOptimizationsErrorMessage();
context.report(ISSUE, element, context.getValueLocation(attr), message);
}
if ("android.hardware.action.NEW_PICTURE".equals(name)
|| "android.hardware.action.NEW_VIDEO".equals(name)
|| "com.android.camera.NEW_PICTURE".equals(name)) {
String message = String.format("Use of %1$s is deprecated for all apps starting "
+ "with the N release independent of the target SDK. Apps should not "
+ "rely on these broadcasts and instead use `JobScheduler`", name);
context.report(ISSUE, element, context.getValueLocation(attr), message);
}
}
@Nullable
@Override
public List getApplicableReferenceNames() {
return Collections.singletonList("ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS");
}
@Override
public void visitReference(@NonNull JavaContext context, @Nullable JavaElementVisitor visitor,
@NonNull PsiJavaCodeReferenceElement reference, @NonNull PsiElement resolved) {
if (resolved instanceof PsiField &&
context.getEvaluator().isMemberInSubClassOf((PsiField)resolved,
"android.provider.Settings", false)
&& context.getMainProject().getTargetSdkVersion().getFeatureLevel() >= 23) {
String message = getBatteryOptimizationsErrorMessage();
context.report(ISSUE, reference, context.getNameLocation(reference), message);
}
}
@NonNull
private static String getBatteryOptimizationsErrorMessage() {
return "Use of `REQUEST_IGNORE_BATTERY_OPTIMIZATIONS` violates the "
+ "Play Store Content Policy regarding acceptable use cases, as described in "
+ "http://developer.android.com/training/monitoring-device-state/doze-standby.html";
}
}
