SDCardUtils SD卡工具箱

package com.mlibs.library.common.utils;


import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.support.v4.content.ContextCompat;

import java.io.File;

import static android.os.Environment.getExternalStorageState;

/**
* SD卡工具箱
* 内部存储;外部存储;SD卡;扩展卡(可拔插存储卡)
* https://blog.csdn.net/csdn_aiyang/article/details/80665185
*/
public class SDCardUtils {
/**
* 获取SD卡的状态
*/
public static String getState() {
return getExternalStorageState();
}


/**
* SD卡是否可用
*
* @return 只有当SD卡已经安装并且准备好了才返回true
*/
public static boolean isAvailable() {
return getState().equals(Environment.MEDIA_MOUNTED);
}

/**
* 获取内部的根目录
*
* @return /data/data/package/files app内部路径
*/
public static File getInternalFilesDir(Context context) {
return context.getFilesDir();
}

/**
* 获取内部的根目录
*
* @return /data/data/package/cache app内部路径
*/
public static File getInternalCacheDir(Context context) {
return context.getCacheDir();
}

/**
* @return /storage/sdcard0/Android/data/package/files
*/
public static File getExternalFilesDir(Context context) {
return context.getExternalFilesDir(null);
}

/**
* Environment.DIRECTORY_ALARMS /storage/sdcard0/Android/data/package/files/Alarms
* Environment.DIRECTORY_DCIM /storage/sdcard0/Android/data/package/files/DCIM
* Environment.DIRECTORY_DOWNLOADS /storage/sdcard0/Android/data/package/files/Download
* Environment.DIRECTORY_MOVIES /storage/sdcard0/Android/data/package/files/Movies
* Environment.DIRECTORY_MUSIC /storage/sdcard0/Android/data/package/files/Music
* Environment.DIRECTORY_NOTIFICATIONS /storage/sdcard0/Android/data/package/files/Notifications
* Environment.DIRECTORY_PICTURES /storage/sdcard0/Android/data/package/files/Pictures
* Environment.DIRECTORY_PODCASTS /storage/sdcard0/Android/data/package/files/Podcasts
* Environment.DIRECTORY_RINGTONES /storage/sdcard0/Android/data/package/files/Ringtones
*
* @return /storage/sdcard0/Android/data/package/files
*/
public static File getExternalFilesDir(Context context, String directoryType) {
return context.getExternalFilesDir(directoryType);
}


/**
* 获取SD卡的根目录
*
* @return /storage/sdcard0
*/
public static File getExternalPublicStorageDirectory() {
return Environment.getExternalStorageDirectory();
}

/**
* SD卡的九大公有目录
* Environment.DIRECTORY_ALARMS /storage/sdcard0/Alarms
* Environment.DIRECTORY_DCIM /storage/sdcard0/DCIM
* Environment.DIRECTORY_DOWNLOADS /storage/sdcard0/Download
* Environment.DIRECTORY_MOVIES /storage/sdcard0/Movies
* Environment.DIRECTORY_MUSIC /storage/sdcard0/Music
* Environment.DIRECTORY_NOTIFICATIONS /storage/sdcard0/Notifications
* Environment.DIRECTORY_PICTURES /storage/sdcard0/Pictures
* Environment.DIRECTORY_PODCASTS /storage/sdcard0/Podcasts
* Environment.DIRECTORY_RINGTONES /storage/sdcard0/Ringtones
*/
public static File getExternalStoragePublicDirectory(String directoryType) {
return Environment.getExternalStoragePublicDirectory(directoryType);
}

/**
* 注意：没有root的手机不能打开该文件夹的
*
* @return /data
*/
public static File getSysDataDirectory() {
return Environment.getDataDirectory();
}

/**
* 注意：没有root的手机不能打开该文件夹的
*
* @return /cache
*/
public static File getSysDownloadCacheDirectory() {
return Environment.getDownloadCacheDirectory();
}

/**
* 注意：没有root的手机不能打开该文件夹的
*
* @return /system
*/
public static File getSysRootDirectory() {
return Environment.getRootDirectory();
}

/**
* 是否有读写权限
*
* @return 是否缺少某项权限
*/
public static boolean isHasPermission(Context context) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
return ContextCompat.checkSelfPermission(context.getApplicationContext(), Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED &&
ContextCompat.checkSelfPermission(context.getApplicationContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
}
return true;
}


/**
* 扫描路径下的文件
*
* @param file 文件路径
*/
public static void scanningFilesName(File file) {
if (file == null) {
return;
}
File[] fs = file.listFiles();
if (fs != null) {
for (File f : fs) {
if (f.isDirectory()) { //若是目录，则递归打印该目录下的文件
LogUtils.d("文件夹:" + f.getPath());
scanningFilesName(f);
}
if (f.isFile()) //若是文件，直接打印
LogUtils.d("文件:" + f.getPath());
}
}
}

/**
* @param path 文件夹路径
* @return 剩余控空间
*/
public long getFreeSpace(String path) {
if (FileUtils.isFolderExist(path)) {
File file = new File(path);
return file.getFreeSpace();
}
return 0;
}

/** 清除本应用内部缓存(/data/data/com.xxx.xxx/files) */
public static void cleanInternalAllFiles(Context context) {
deleteFile(context.getFilesDir());
}

/**
* 删除文件(会删除文件夹)
*/
private static boolean deleteFile(File dir) {
if (dir == null || !dir.exists()) {
return false;
}
if (dir.isDirectory()) {
File[] children = dir.listFiles();
for (File child : children) {
boolean success = deleteFile(child);
if (!success) {
return false;
}
}
}
return dir.delete();
}

}