清除棉花糖中所有应用程序的缓存？
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【中文标题】清除棉花糖中所有应用程序的缓存？【英文标题】：Clear Cache of All Apps in Marshmallow? 【发布时间】：2016-04-28 03:19:31 【问题描述】：我尝试使用以下代码解决： [参考：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
<uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>
但是当我运行这段代码时，会抛出异常：
java.lang.IllegalArgumentException: Wrong number of arguments; expected 3, got 2
任何克服此异常的建议或以编程方式清除所有应用程序缓存的其他解决方案。谢谢
【问题讨论】：
@David Wasser，***.com/questions/14507092/…，请帮帮我 这里有同样的问题。我无法在 Android 6 (Marshmallow) 上解决这个问题 和我的问题一样：***.com/questions/36829176/… 【参考方案1】：点击链接。希望得到解决方案 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();
【讨论】：
【参考方案2】：看起来在 Android 6 (Marshmallow) 中添加了一个额外的 freeStorage() 方法，它需要一个额外的 volumeUuid 参数：
public void freeStorage(long freeStorageSize, IntentSender pi)
public abstract void freeStorage(String volumeUuid, long freeStorageSize,
IntentSender pi)
显然，新方法首先出现在返回的声明方法列表中。
要解决这个问题，您可以更改原始代码，使其如下所示：
PackageManager pm = getPackageManager();
// Get all methods on the PackageManager
Method[] methods = pm.getClass().getDeclaredMethods();
for (Method m : methods)
if (m.getName().equals("freeStorage"))
Class[] params = m.getParameterTypes();
if (params.length == 2)
// 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;
【讨论】：
我遇到了同样的问题。但我得到了 params.length==3 值。请帮帮我 这里已经回答了为什么这不起作用***.com/a/37042913/1545993以上是关于清除棉花糖中所有应用程序的缓存？的主要内容，如果未能解决你的问题，请参考以下文章