com.hadoopz.MyDroidLib.util.JFileKit Maven / Gradle / Ivy
/*
* Copyright 2017 jw362j.
*
* 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.hadoopz.MyDroidLib.util;
/**
*
* @author jw362j
*/
import java.io.File;
import android.content.Context;
import android.os.Environment;
/**
* Android操作文件工具类
*
* @author blue
*
*/
public class JFileKit {
/**
* 检测 SD 是否可写
*
* @return
*/
public static boolean sdcardIsReadyForWrite() {
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
return true;
}
return false;
}
/**
* 检测 SD 是否可读
*
* @return
*/
public static boolean sdcardIsReadyForRead() {
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
return true;
}
return false;
}
/**
* 获取SDCard的路径
*
* @return
*/
public static String getSDCardPath() {
if (!sdcardIsReadyForWrite()) {
MyLogUtil.e("","SDCard不是可读写模式");
return null;
}
String sdcard = Environment.getExternalStorageDirectory().getAbsolutePath();
return sdcard;
}
public static String getMp4FileStorageDir(Context context, String foldername) {
if (foldername == null) {
foldername = "MP4_RECORD";
}
String mp4Path;
File mp4_file_dir;
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) || !Environment.isExternalStorageRemovable()) {
mp4Path = context.getExternalFilesDir(foldername).getAbsolutePath();
mp4_file_dir = new File(mp4Path);
} else {
mp4Path = context.getFilesDir().getAbsolutePath();
if (!mp4Path.endsWith(File.separator)) {
mp4Path = mp4Path + File.separator;
}
mp4Path = mp4Path + foldername;
mp4_file_dir = new File(mp4Path);
}
if (mp4_file_dir != null && !mp4_file_dir.exists()) {
mp4_file_dir.mkdir();
}
return mp4Path;
}
/**
* 根据传入的uniqueName获取硬盘缓存的路径地址
*
* @author blue
* @param context
* @return
*/
public static String getDiskCacheDir(Context context) {
String cachePath;
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) || !Environment.isExternalStorageRemovable()) {
cachePath = context.getExternalCacheDir().getAbsolutePath();
} else {
cachePath = context.getCacheDir().getAbsolutePath();
}
return cachePath;
}
/**
* 在SDCard 创建目录 或文件
*
* 如果存在同名文件则删除文件后再创建,同名文件夹不做任何操作
*
*
* @param path
* @return
*/
public static String createFileOnSDCard(String path) {
if (!sdcardIsReadyForWrite()) {
MyLogUtil.e("JFileKit","SDCard不是可读写模式");
return null;
}
if (!path.startsWith(File.separator)) {
path = File.separator + path;
}
File file = new File(getSDCardPath() + path);
if (file.isFile() && file.exists()) {
file.delete();
}
if (!file.exists()) {
if (!file.mkdirs()) {
MyLogUtil.e("JFileKit","文件/文件夹" + path + "创建失败");
return null;
}
}
return getSDCardPath() + path;
}
/**
* 删除SDCard文件或文件夹
*
* @param path 文件路径
*/
public static void deleteFileOnSDCard(String path) {
if (!sdcardIsReadyForWrite()) {
MyLogUtil.e("JFileKit","SD卡不可写");
return;
}
if (!path.startsWith(File.separator)) {
path = File.separator + path;
}
File file = new File(getSDCardPath() + path);
if (file.isFile() && file.exists()) {
if (!file.delete()) {
MyLogUtil.e("JFileKit", "删除文件" + path + "失败");
}
}
}
/**
* 获取data/data/package/files目录
*
* 该目录在卸载程序时自动删除
*
* @param context
* @return
*/
public static String getDataFolderPath(Context context) {
String sdcard = context.getFilesDir().getAbsolutePath();
return sdcard;
}
/**
* 在data/data/package/files创建目录 或文件
*
* 如果存在同名文件则删除文件后再创建,同名文件夹不做任何操作
*
* 该目录在卸载程序时自动删除
*
* @param contenxt
* @param path 文件夹绝对路径
* @return
*
*/
public static String createFileOnDataFolder(Context contenxt, String path) {
if (!path.startsWith(File.separator)) {
path = File.separator + path;
}
File file = new File(getDataFolderPath(contenxt) + path);
if (file.isFile() && file.exists()) {
file.delete();
}
if (!file.exists()) {
if (!file.mkdirs()) {
MyLogUtil.e("JFileKit","文件/文件夹" + path + "创建失败");
return null;
}
}
return getDataFolderPath(contenxt) + path;
}
/**
* 删除data/data/package/files文件或文件夹
*
* 该目录在卸载程序时自动删除
*
* @param path 文件路径
*/
public static void deleteFileOnDataFolder(String path) {
if (!path.startsWith(File.separator)) {
path = File.separator + path;
}
File file = new File(getSDCardPath() + path);
if (file.isFile() && file.exists()) {
if (!file.delete()) {
MyLogUtil.e("JFileKit","删除文件" + path + "失败");
}
}
}
/**
* Java文件操作 获取文件扩展名
*
* @param filename
* @return
*/
public static String getExtensionName(String filename) {
if ((filename != null) && (filename.length() > 0)) {
int dot = filename.lastIndexOf('.');
if ((dot > -1) && (dot < (filename.length() - 1))) {
return filename.substring(dot + 1);
}
}
return filename;
}
/**
* Java文件操作 获取不带扩展名的文件名
*
* @param filename
* @return
*/
public static String getFileNameNoEx(String filename) {
if ((filename != null) && (filename.length() > 0)) {
int dot = filename.lastIndexOf('.');
if ((dot > -1) && (dot < (filename.length()))) {
return filename.substring(0, dot);
}
}
return filename;
}
/**
* 递归删除指定文件夹下的所有文件（包括该文件夹）
*
* @author andrew
* @param file
*/
public static void deleteAll(File file) {
if (file.isFile() || file.list().length == 0) {
file.delete();
} else {
File[] files = file.listFiles();
for (File f : files) {
deleteAll(f);// 递归删除每一个文件
f.delete();// 删除该文件夹
}
file.delete();
}
}
}