Android爲TV端助力 清除本應用裏的各類數據的方法

public class DataCleanManager {
/**
* * 清除本應用內部緩存(/data/data/com.xxx.xxx/cache) * *
*
* @param context
*/
public static void cleanInternalCache(Context context) {
deleteFilesByDirectory(context.getCacheDir());
}

/**
* * 清除本應用全部數據庫(/data/data/com.xxx.xxx/databases) * *
*
* @param context
*/
public static void cleanDatabases(Context context) {
deleteFilesByDirectory(new File("/data/data/"
+ context.getPackageName() + "/databases"));
}

/**
* * 清除本應用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) *
*
* @param context
*/
public static void cleanSharedPreference(Context context) {
deleteFilesByDirectory(new File("/data/data/"
+ context.getPackageName() + "/shared_prefs"));
}

/**
* * 按名字清除本應用數據庫 * *
*
* @param context
* @param dbName
*/
public static void cleanDatabaseByName(Context context, String dbName) {
context.deleteDatabase(dbName);
}

/**
* * 清除/data/data/com.xxx.xxx/files下的內容 * *
*
* @param context
*/
public static void cleanFiles(Context context) {
deleteFilesByDirectory(context.getFilesDir());
}

/**
* * 清除外部cache下的內容(/mnt/sdcard/android/data/com.xxx.xxx/cache)
*
* @param context
*/
public static void cleanExternalCache(Context context) {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
deleteFilesByDirectory(context.getExternalCacheDir());
}
}
/**
* * 清除自定義路徑下的文件，使用需當心，請不要誤刪。並且只支持目錄下的文件刪除 * *
*
* @param filePath
* */
public static void cleanCustomCache(String filePath) {
deleteFilesByDirectory(new File(filePath));
}

/**
* * 清除本應用全部的數據 * *
*
* @param context
* @param filepath
*/
public static void cleanApplicationData(Context context, String... filepath) {
cleanInternalCache(context);
cleanExternalCache(context);
cleanDatabases(context);
cleanSharedPreference(context);
cleanFiles(context);
if (filepath == null) {
return;
}
for (String filePath : filepath) {
cleanCustomCache(filePath);
}
}

/**
* * 刪除方法 這裏只會刪除某個文件夾下的文件，若是傳入的directory是個文件，將不作處理 * *
*
* @param directory
*/
private static void deleteFilesByDirectory(File directory) {
if (directory != null && directory.exists() && directory.isDirectory()) {
for (File item : directory.listFiles()) {
item.delete();
}
}
}

// 獲取文件
//Context.getExternalFilesDir() --> SDCard/Android/data/你的應用的包名/files/ 目錄，通常放一些長時間保存的數據
//Context.getExternalCacheDir() --> SDCard/Android/data/你的應用包名/cache/目錄，通常存放臨時緩存數據
public static long getFolderSize(File file) throws Exception {
long size = 0;
try {
File[] fileList = file.listFiles();
for (int i = 0; i < fileList.length; i++) {
// 若是下面還有文件
if (fileList[i].isDirectory()) {
size = size + getFolderSize(fileList[i]);
} else {
size = size + fileList[i].length();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return size;
}

/**
* 刪除指定目錄下文件及目錄
*
* @param deleteThisPath
* @param filepath
* @return
*/
public static void deleteFolderFile(String filePath, boolean deleteThisPath) {
if (!TextUtils.isEmpty(filePath)) {
try {
File file = new File(filePath);
if (file.isDirectory()) {// 若是下面還有文件
File files[] = file.listFiles();
for (int i = 0; i < files.length; i++) {
deleteFolderFile(files[i].getAbsolutePath(), true);
}
}
if (deleteThisPath) {
if (!file.isDirectory()) {// 若是是文件，刪除
file.delete();
} else {// 目錄
if (file.listFiles().length == 0) {// 目錄下沒有文件或者目錄，刪除
file.delete();
}
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

/**
* 格式化單位
*
* @param size
* @return
*/
public static String getFormatSize(double size) {
double kiloByte = size / 1024;
if (kiloByte < 1) {
return size + "Byte";
}

double megaByte = kiloByte / 1024;
if (megaByte < 1) {
BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
return result1.setScale(1, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "KB";
}

double gigaByte = megaByte / 1024;
if (gigaByte < 1) {
BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
return result2.setScale(1, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "MB";
}

double teraBytes = gigaByte / 1024;
if (teraBytes < 1) {
BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
return result3.setScale(1, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "GB";
}
BigDecimal result4 = new BigDecimal(teraBytes);
return result4.setScale(1, BigDecimal.ROUND_HALF_UP).toPlainString()
+ "TB";
}


public static String getCacheSize(File file) throws Exception {
return getFormatSize(getFolderSize(file));
}