Android 清理資料/快取工具類 CleanCacheUtil
阿新 • • 發佈：2019-05-18
/**
* * 清除快取
* *
*
*/
public class CleanCacheUtil {
/**
* @param context
* @return
* @throws Exception
* 獲取當前快取
*/
public static String getTotalCacheSize(Context context) throws Exception {
long cacheSize = getFolderSize(context.getCacheDir());
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
cacheSize += getFolderSize(context.getExternalCacheDir());
}
return getFormatSize(cacheSize);
}
/**
* @param context
* 刪除快取
*/
public static void clearAllCache(Context context) {
deleteDir(context.getCacheDir());
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
deleteDir(context.getExternalCacheDir());
}
}
/**
* * 清除本應用內部快取(/data/data/com.xxx.xxx/cache) * *
*
* @param context
*/
public static void cleanInternalCache(Context context) {
Log.e("DataCleanManager", "cleanInternalCache");
deleteDir(context.getCacheDir());
}
/**
* * 清除本應用所有資料庫(/data/data/com.xxx.xxx/databases) * *
*
* @param context
*/
public static void cleanDatabases(Context context) {
Log.e("DataCleanManager", "cleanDatabases");
deleteDir(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) {
Log.e("DataCleanManager", "cleanSharedPreference");
deleteDir(new File("/data/data/"
+ context.getPackageName() + "/shared_prefs"));
}
/**
* * 按名字清除本應用資料庫 * *
*
* @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) {
Log.e("DataCleanManager", "cleanFiles");
deleteDir(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) {
Log.e("DataCleanManager", "cleanExternalCache");
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
deleteDir(context.getExternalCacheDir());
}
}
/**
* * 清除自定義路徑下的檔案，使用需小心，請不要誤刪。而且只支援目錄下的檔案刪除 * *
*
* @param filePath
* */
public static void cleanCustomCache(String filePath) {
deleteDir(new File(filePath));
}
/**
* * 清除本應用所有的資料 * *
*
* @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);
}
}
private static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
int size = 0;
if (children != null) {
size = children.length;
for (int i = 0; i < size; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
}
if (dir == null) {
return true;
} else {
return dir.delete();
}
}
// 獲取檔案
// Context.getExternalFilesDir() --> SDCard/Android/data/你的應用的包名/files/
// 目錄，一般放一些長時間儲存的資料
// Context.getExternalCacheDir() -->
// SDCard/Android/data/你的應用包名/cache/目錄，一般存放臨時快取資料
public static long getFolderSize(File file) throws Exception {
long size = 0;
try {
File[] fileList = file.listFiles();
for (int i = 0; i < fileList.length; i++) {
// 如果下面還有檔案
if (fileList[i].isDirectory()) {
size = size + getFolderSize(fileList[i]);
} else {
size = size + fileList[i].length();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return size;
}
/**
* 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(2, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "KB";
}
double gigaByte = megaByte / 1024;
if (gigaByte < 1) {
BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
return result2.setScale(2, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "MB";
}
double teraBytes = gigaByte / 1024;
if (teraBytes < 1) {
BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
return result3.setScale(2, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "GB";
}
BigDecimal result4 = new BigDecimal(teraBytes);
return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
+"TB";
}
}