Clear Cache of All Apps in Marshmallow?

问题

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;
        }
    }

and add permission in AndroidMenifest.xml file

<uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>

But when i run this code, then throw exception :

java.lang.IllegalArgumentException: Wrong number of arguments; expected 3, got 2

Any suggestion to overcome this exception or another solution for clear cache of all apps programmatically. Thanks

回答1:

It looks like there is an additional freeStorage() method added in Android 6 (Marshmallow) that takes an additional volumeUuid parameter:

public void freeStorage(long freeStorageSize, IntentSender pi)

public abstract void freeStorage(String volumeUuid, long freeStorageSize,
        IntentSender pi)

Obviously, the new method is showing up first in the returned list of declared methods.

To get around this, you can alter the orginal code so that it looks like this:

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;
        }
    }
}

回答2:

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();
        }
    }
}

来源：https://stackoverflow.com/questions/36904654/clear-cache-of-all-apps-in-marshmallow