I'm working on cache cleaner app, after doing research on google I found that Android system has moved "CLEAR_APP_CACHE" permission to "signature, privileged" state. So I'm unable clear cache with freeStorageAndNotify method.
Apps on google playstore like CCleaner, Power Clean etc.. are using Accessibility Service To Delete Cache.
I have also created basic accessibility service for my app, but don't know how to delete cache of apps
1 Answers
Answers 1
You can get a list of installed apps and delete cache like:
public static void clearALLCache() { List<PackageInfo> packList = getPackageManager().getInstalledPackages(0); for (int i=0; i < packList.size(); i++) { PackageInfo packInfo = packList.get(i); if ( (packInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) { String appName = packInfo.applicationInfo.loadLabel(getPackageManager()).toString(); try { // clearing app data // Runtime runtime = Runtime.getRuntime(); // runtime.exec("pm clear "+packInfo.packageName); Context context = getApplicationContext().createPackageContext(packInfo.packageName,Context.CONTEXT_IGNORE_SECURITY); deleteCache(context); } catch (Exception e) { e.printStackTrace(); } } } } public static void deleteCache(Context context) { try { File dir = context.getCacheDir(); deleteDir(dir); } catch (Exception e) {} } public static boolean deleteDir(File dir) { if (dir != null && dir.isDirectory()) { String[] children = dir.list(); for (int i = 0; i < children.length; i++) { boolean success = deleteDir(new File(dir, children[i])); if (!success) { return false; } } return dir.delete(); } else if(dir!= null && dir.isFile()) { return dir.delete(); } else { return false; } } It is equivalent to clear data option under Settings --> Application Manager --> Your App --> Clear data. (In comment)
For making your application support this you should also follow Privileged Permission Whitelisting from google
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