我尝试使用以下代码来解决:
[参考: Android:清除所有应用程序的缓存吗?
I try to solve using below code:
[Reference: Android: Clear Cache of All Apps?
PackageManager pm = getPackageManager();
// Get all methods on the PackageManager
Method[] methods = pm.getClass().getDeclaredMethods();
for (Method m : methods) {
if (m.getName().equals("freeStorage")) {
// Found the method I want to use
try {
long desiredFreeStorage = 8 * 1024 * 1024 * 1024; // Request for 8GB of free space
m.invoke(pm, desiredFreeStorage , null);
} catch (Exception e) {
// Method invocation failed. Could be a permission problem
}
break;
}
}
并在AndroidMenifest.xml文件中添加权限
and add permission in AndroidMenifest.xml file
<uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>
但是当我运行这段代码时，然后抛出异常:
But when i run this code, then throw exception :
java.lang.IllegalArgumentException: Wrong number of arguments; expected 3, got 2
关于克服此异常的任何建议或以编程方式清除所有应用程序的另一种解决方案.谢谢
Any suggestion to overcome this exception or another solution for clear cache of all apps programmatically. Thanks
网友1解答：
关注链接.希望能找到解决方案
https://fossdroid.com/s.html?q=cache+cleaner
follow the link. hopefully get a solutions
https://fossdroid.com/s.html?q=cache+cleaner
import android.Manifest;
import android.app.ProgressDialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.IBinder;
import android.os.StatFs;
import android.preference.PreferenceManager;
import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;
import android.support.v4.view.MenuItemCompat;
import android.support.v4.view.ViewCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.SearchView;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AnimationUtils;
import android.widget.TextView;
import android.widget.Toast;
import com.frozendevs.cache.cleaner.R;
import com.frozendevs.cache.cleaner.activity.SettingsActivity;
import com.frozendevs.cache.cleaner.model.AppsListItem;
import com.frozendevs.cache.cleaner.model.CleanerService;
import com.frozendevs.cache.cleaner.model.adapter.AppsListAdapter;
import com.frozendevs.cache.cleaner.widget.DividerDecoration;
import com.frozendevs.cache.cleaner.widget.RecyclerView;
import java.util.List;
public class CleanerFragment extends Fragment implements CleanerService.OnActionListener {
private static final int REQUEST_STORAGE = 0;
private static final String[] PERMISSIONS_STORAGE = {
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
private CleanerService mCleanerService;
private AppsListAdapter mAppsListAdapter;
private TextView mEmptyView;
private SharedPreferences mSharedPreferences;
private ProgressDialog mProgressDialog;
private View mProgressBar;
private TextView mProgressBarText;
private LinearLayoutManager mLayoutManager;
private Menu mOptionsMenu;
private boolean mAlreadyScanned = false;
private boolean mAlreadyCleaned = false;
private String mSearchQuery;
private String mSortByKey;
private String mCleanOnAppStartupKey;
private String mExitAfterCleanKey;
private ServiceConnection mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
mCleanerService = ((CleanerService.CleanerServiceBinder) service).getService();
mCleanerService.setOnActionListener(CleanerFragment.this);
updateStorageUsage();
if (!mCleanerService.isCleaning() && !mCleanerService.isScanning()) {
if (mSharedPreferences.getBoolean(mCleanOnAppStartupKey, false) &&
!mAlreadyCleaned) {
mAlreadyCleaned = true;
cleanCache();
} else if (!mAlreadyScanned) {
mCleanerService.scanCache();
}
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
mCleanerService.setOnActionListener(null);
mCleanerService = null;
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
setRetainInstance(true);
mSortByKey = getString(R.string.sort_by_key);
mCleanOnAppStartupKey = getString(R.string.clean_on_app_startup_key);
mExitAfterCleanKey = getString(R.string.exit_after_clean_key);
mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
mAppsListAdapter = new AppsListAdapter();
mProgressDialog = new ProgressDialog(getActivity());
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgressDialog.setCanceledOnTouchOutside(false);
mProgressDialog.setTitle(R.string.cleaning_cache);
mProgressDialog.setMessage(getString(R.string.cleaning_in_progress));
mProgressDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
return true;
}
});
getActivity().getApplication().bindService(new Intent(getActivity(), CleanerService.class),
mServiceConnection, Context.BIND_AUTO_CREATE);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.cleaner_fragment, container, false);
mEmptyView = (TextView) rootView.findViewById(R.id.empty_view);
mLayoutManager = new LinearLayoutManager(getActivity());
RecyclerView recyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setAdapter(mAppsListAdapter);
recyclerView.setEmptyView(mEmptyView);
recyclerView.addItemDecoration(new DividerDecoration(getActivity()));
mProgressBar = rootView.findViewById(R.id.progressBar);
mProgressBarText = (TextView) rootView.findViewById(R.id.progressBarText);
return rootView;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
mOptionsMenu = menu;
inflater.inflate(R.menu.main_menu, menu);
final MenuItem searchItem = menu.findItem(R.id.action_search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
mSearchQuery = query;
searchView.clearFocus();
return true;
}
@Override
public boolean onQueryTextChange(String newText) {
if (ViewCompat.isLaidOut(searchView) && mSearchQuery != null) {
String oldText = mSearchQuery;
mSearchQuery = newText;
if (!oldText.equals(newText)) {
mAppsListAdapter.sortAndFilter(getActivity(), getSortBy(), newText);
}
}
return true;
}
});
MenuItemCompat.setOnActionExpandListener(searchItem,
new MenuItemCompat.OnActionExpandListener() {
@Override
public boolean onMenuItemActionExpand(MenuItem item) {
if (mSearchQuery == null) {
mSearchQuery = "";
}
mAppsListAdapter.setShowHeaderView(false);
mEmptyView.setText(R.string.no_such_app);
return true;
}
@Override
public boolean onMenuItemActionCollapse(MenuItem item) {
mSearchQuery = null;
mAppsListAdapter.clearFilter();
mAppsListAdapter.setShowHeaderView(true);
if (mLayoutManager.findFirstCompletelyVisibleItemPosition() == 0) {
mLayoutManager.scrollToPosition(0);
}
mEmptyView.setText(R.string.empty_cache);
return true;
}
});
if (mSearchQuery != null) {
MenuItemCompat.expandActionView(searchItem);
searchView.setQuery(mSearchQuery, false);
}
updateOptionsMenu();
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_clean:
if (mCleanerService != null && !mCleanerService.isScanning() &&
!mCleanerService.isCleaning() && mCleanerService.getCacheSize() > 0) {
mAlreadyCleaned = false;
cleanCache();
}
return true;
case R.id.action_refresh:
if (mCleanerService != null && !mCleanerService.isScanning() &&
!mCleanerService.isCleaning()) {
mCleanerService.scanCache();
}
return true;
case R.id.action_settings:
startActivity(new Intent(getActivity(), SettingsActivity.class));
return true;
case R.id.action_sort_by_app_name:
setSortBy(AppsListAdapter.SortBy.APP_NAME);
updateOptionsMenu();
return true;
case R.id.action_sort_by_cache_size:
setSortBy(AppsListAdapter.SortBy.CACHE_SIZE);
updateOptionsMenu();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onPrepareOptionsMenu(Menu menu) {
updateOptionsMenu();
}
@Override
public void onDestroyOptionsMenu() {
mOptionsMenu = null;
}
@Override
public void onResume() {
updateStorageUsage();
updateOptionsMenu();
if (mCleanerService != null) {
if (mCleanerService.isScanning() && !isProgressBarVisible()) {
showProgressBar(true);
} else if (!mCleanerService.isScanning() && isProgressBarVisible()) {
showProgressBar(false);
}
if (mCleanerService.isCleaning() && !mProgressDialog.isShowing()) {
mProgressDialog.show();
}
}
super.onResume();
}
@Override
public void onPause() {
if (mProgressDialog.isShowing()) {
mProgressDialog.dismiss();
}
super.onPause();
}
@Override
public void onDestroy() {
getActivity().getApplication().unbindService(mServiceConnection);
super.onDestroy();
}
private void updateOptionsMenu() {
if (mOptionsMenu != null) {
mOptionsMenu.findItem(R.id.action_sort_by_app_name).setVisible(
getSortBy() == AppsListAdapter.SortBy.CACHE_SIZE);
mOptionsMenu.findItem(R.id.action_sort_by_cache_size).setVisible(
getSortBy() == AppsListAdapter.SortBy.APP_NAME);
}
}
private void updateStorageUsage() {
if (mAppsListAdapter != null) {
StatFs stat = new StatFs(Environment.getDataDirectory().getAbsolutePath());
long totalMemory = (long) stat.getBlockCount() * (long) stat.getBlockSize();
long medMemory = mCleanerService != null ? mCleanerService.getCacheSize() : 0;
long lowMemory = (long) stat.getAvailableBlocks() * (long) stat.getBlockSize();
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB &&
!Environment.isExternalStorageEmulated()) {
stat = new StatFs(Environment.getExternalStorageDirectory().getAbsolutePath());
totalMemory += (long) stat.getBlockCount() * (long) stat.getBlockSize();
lowMemory += (long) stat.getAvailableBlocks() * (long) stat.getBlockSize();
}
long highMemory = totalMemory - medMemory - lowMemory;
mAppsListAdapter.updateStorageUsage(totalMemory, lowMemory, medMemory, highMemory);
}
}
private AppsListAdapter.SortBy getSortBy() {
try {
return AppsListAdapter.SortBy.valueOf(mSharedPreferences.getString(mSortByKey,
AppsListAdapter.SortBy.CACHE_SIZE.toString()));
} catch (ClassCastException e) {
return AppsListAdapter.SortBy.CACHE_SIZE;
}
}
private void setSortBy(AppsListAdapter.SortBy sortBy) {
mSharedPreferences.edit().putString(mSortByKey, sortBy.toString()).apply();
if (mCleanerService != null && !mCleanerService.isScanning() &&
!mCleanerService.isCleaning()) {
mAppsListAdapter.sortAndFilter(getActivity(), sortBy, mSearchQuery);
}
}
private boolean isProgressBarVisible() {
return mProgressBar.getVisibility() == View.VISIBLE;
}
private void showProgressBar(boolean show) {
if (show) {
mProgressBar.setVisibility(View.VISIBLE);
} else {
mProgressBar.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_out));
mProgressBar.setVisibility(View.GONE);
}
}
private void showStorageRationale() {
AlertDialog dialog = new AlertDialog.Builder(getActivity()).create();
dialog.setTitle(R.string.rationale_title);
dialog.setMessage(getString(R.string.rationale_storage));
dialog.setButton(AlertDialog.BUTTON_POSITIVE, getString(android.R.string.ok),
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
dialog.show();
}
private void cleanCache() {
if (!CleanerService.canCleanExternalCache(getActivity())) {
if (shouldShowRequestPermissionRationale(PERMISSIONS_STORAGE[0])) {
showStorageRationale();
} else {
requestPermissions(PERMISSIONS_STORAGE, REQUEST_STORAGE);
}
} else {
mCleanerService.cleanCache();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
if (requestCode == REQUEST_STORAGE) {
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
mCleanerService.cleanCache();
} else {
showStorageRationale();
}
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
@Override
public void onScanStarted(Context context) {
if (isAdded()) {
if (mProgressDialog.isShowing()) {
mProgressDialog.dismiss();
}
mProgressBarText.setText(R.string.scanning);
showProgressBar(true);
}
}
@Override
public void onScanProgressUpdated(Context context, int current, int max) {
if (isAdded()) {
mProgressBarText.setText(getString(R.string.scanning_m_of_n, current, max));
}
}
@Override
public void onScanCompleted(Context context, List<AppsListItem> apps) {
mAppsListAdapter.setItems(getActivity(), apps, getSortBy(), mSearchQuery);
if (isAdded()) {
updateStorageUsage();
showProgressBar(false);
}
mAlreadyScanned = true;
}
@Override
public void onCleanStarted(Context context) {
if (isAdded()) {
if (isProgressBarVisible()) {
showProgressBar(false);
}
if (!getActivity().isFinishing()) {
mProgressDialog.show();
}
}
}
@Override
public void onCleanCompleted(Context context, boolean succeeded) {
if (succeeded) {
mAppsListAdapter.trashItems();
}
if (isAdded()) {
updateStorageUsage();
if (mProgressDialog.isShowing()) {
mProgressDialog.dismiss();
}
}
Toast.makeText(context, succeeded ? R.string.cleaned : R.string.toast_could_not_clean,
Toast.LENGTH_LONG).show();
if (succeeded && getActivity() != null && !mAlreadyCleaned &&
mSharedPreferences.getBoolean(mExitAfterCleanKey, false)) {
getActivity().finish();
}
}
}