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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.applications.appinfo;
     18 
     19 import android.app.LoaderManager;
     20 import android.content.Context;
     21 import android.content.Loader;
     22 import android.content.pm.ApplicationInfo;
     23 import android.os.Bundle;
     24 import android.os.UserHandle;
     25 import android.support.annotation.VisibleForTesting;
     26 import android.support.v7.preference.Preference;
     27 import android.text.format.Formatter;
     28 
     29 import com.android.settings.R;
     30 import com.android.settings.SettingsPreferenceFragment;
     31 import com.android.settings.applications.AppStorageSettings;
     32 import com.android.settings.applications.FetchPackageStorageAsyncLoader;
     33 import com.android.settingslib.applications.StorageStatsSource;
     34 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     35 import com.android.settingslib.core.lifecycle.events.OnPause;
     36 import com.android.settingslib.core.lifecycle.events.OnResume;
     37 
     38 public class AppStoragePreferenceController extends AppInfoPreferenceControllerBase
     39         implements LoaderManager.LoaderCallbacks<StorageStatsSource.AppStorageStats>,
     40         LifecycleObserver, OnResume, OnPause {
     41 
     42     private StorageStatsSource.AppStorageStats mLastResult;
     43 
     44     public AppStoragePreferenceController(Context context, String key) {
     45         super(context, key);
     46     }
     47 
     48     @Override
     49     public void updateState(Preference preference) {
     50         final boolean isExternal =
     51                 (mParent.getAppEntry().info.flags & ApplicationInfo.FLAG_EXTERNAL_STORAGE) != 0;
     52         preference.setSummary(getStorageSummary(mLastResult, isExternal));
     53     }
     54 
     55     @Override
     56     public void onResume() {
     57         mParent.getLoaderManager().restartLoader(mParent.LOADER_STORAGE, Bundle.EMPTY, this);
     58     }
     59 
     60     @Override
     61     public void onPause() {
     62         mParent.getLoaderManager().destroyLoader(mParent.LOADER_STORAGE);
     63     }
     64 
     65     @Override
     66     protected Class<? extends SettingsPreferenceFragment> getDetailFragmentClass() {
     67         return AppStorageSettings.class;
     68     }
     69 
     70     @VisibleForTesting
     71     CharSequence getStorageSummary(
     72             StorageStatsSource.AppStorageStats stats, boolean isExternal) {
     73         if (stats == null) {
     74             return mContext.getText(R.string.computing_size);
     75         }
     76         final CharSequence storageType = mContext.getString(isExternal
     77                 ? R.string.storage_type_external
     78                 : R.string.storage_type_internal);
     79         return mContext.getString(R.string.storage_summary_format,
     80                 Formatter.formatFileSize(mContext, stats.getTotalBytes()),
     81                 storageType.toString().toLowerCase());
     82     }
     83 
     84     @Override
     85     public Loader<StorageStatsSource.AppStorageStats> onCreateLoader(int id, Bundle args) {
     86         return new FetchPackageStorageAsyncLoader(mContext, new StorageStatsSource(mContext),
     87                 mParent.getAppEntry().info, UserHandle.of(UserHandle.myUserId()));
     88     }
     89 
     90     @Override
     91     public void onLoadFinished(Loader<StorageStatsSource.AppStorageStats> loader,
     92             StorageStatsSource.AppStorageStats result) {
     93         mLastResult = result;
     94         updateState(mPreference);
     95     }
     96 
     97     @Override
     98     public void onLoaderReset(Loader<StorageStatsSource.AppStorageStats> loader) {
     99     }
    100 
    101 }
    102