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      1 /*
      2  * Copyright (C) 2015 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.deviceinfo;
     18 
     19 import android.content.ComponentName;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.ServiceConnection;
     23 import android.net.TrafficStats;
     24 import android.os.AsyncTask;
     25 import android.os.IBinder;
     26 import android.os.RemoteException;
     27 import android.os.UserHandle;
     28 import android.os.storage.StorageManager;
     29 import android.os.storage.VolumeInfo;
     30 import android.telecom.Log;
     31 import android.text.format.DateUtils;
     32 import android.text.format.Formatter;
     33 
     34 import com.android.internal.app.IMediaContainerService;
     35 
     36 import java.util.concurrent.CountDownLatch;
     37 import java.util.concurrent.TimeUnit;
     38 
     39 import static com.android.settings.deviceinfo.StorageSettings.TAG;
     40 
     41 public abstract class MigrateEstimateTask extends AsyncTask<Void, Void, Long> implements
     42         ServiceConnection {
     43     private static final String EXTRA_SIZE_BYTES = "size_bytes";
     44 
     45     private static final ComponentName DEFAULT_CONTAINER_COMPONENT = new ComponentName(
     46             "com.android.defcontainer", "com.android.defcontainer.DefaultContainerService");
     47 
     48     /**
     49      * Assume roughly a Class 10 card.
     50      */
     51     private static final long SPEED_ESTIMATE_BPS = 10 * TrafficStats.MB_IN_BYTES;
     52 
     53     private final Context mContext;
     54     private final StorageManager mStorage;
     55 
     56     private final CountDownLatch mConnected = new CountDownLatch(1);
     57     private IMediaContainerService mService;
     58 
     59     private long mSizeBytes = -1;
     60 
     61     public MigrateEstimateTask(Context context) {
     62         mContext = context;
     63         mStorage = context.getSystemService(StorageManager.class);
     64     }
     65 
     66     public void copyFrom(Intent intent) {
     67         mSizeBytes = intent.getLongExtra(EXTRA_SIZE_BYTES, -1);
     68     }
     69 
     70     public void copyTo(Intent intent) {
     71         intent.putExtra(EXTRA_SIZE_BYTES, mSizeBytes);
     72     }
     73 
     74     @Override
     75     protected Long doInBackground(Void... params) {
     76         if (mSizeBytes != -1) {
     77             return mSizeBytes;
     78         }
     79 
     80         final VolumeInfo privateVol = mContext.getPackageManager().getPrimaryStorageCurrentVolume();
     81         final VolumeInfo emulatedVol = mStorage.findEmulatedForPrivate(privateVol);
     82 
     83         if (emulatedVol == null) {
     84             Log.w(TAG, "Failed to find current primary storage");
     85             return -1L;
     86         }
     87 
     88         final String path = emulatedVol.getPath().getAbsolutePath();
     89         Log.d(TAG, "Estimating for current path " + path);
     90 
     91         final Intent intent = new Intent().setComponent(DEFAULT_CONTAINER_COMPONENT);
     92         mContext.bindServiceAsUser(intent, this, Context.BIND_AUTO_CREATE, UserHandle.SYSTEM);
     93 
     94         try {
     95             if (mConnected.await(15, TimeUnit.SECONDS)) {
     96                 return mService.calculateDirectorySize(path);
     97             }
     98         } catch (InterruptedException | RemoteException e) {
     99             Log.w(TAG, "Failed to measure " + path);
    100         } finally {
    101             mContext.unbindService(this);
    102         }
    103 
    104         return -1L;
    105     }
    106 
    107     @Override
    108     protected void onPostExecute(Long result) {
    109         mSizeBytes = result;
    110         long timeMillis = (mSizeBytes * DateUtils.SECOND_IN_MILLIS) / SPEED_ESTIMATE_BPS;
    111         timeMillis = Math.max(timeMillis, DateUtils.SECOND_IN_MILLIS);
    112 
    113         final String size = Formatter.formatFileSize(mContext, mSizeBytes);
    114         final String time = DateUtils.formatDuration(timeMillis).toString();
    115         onPostExecute(size, time);
    116     }
    117 
    118     public abstract void onPostExecute(String size, String time);
    119 
    120     @Override
    121     public void onServiceConnected(ComponentName name, IBinder service) {
    122         mService = IMediaContainerService.Stub.asInterface(service);
    123         mConnected.countDown();
    124     }
    125 
    126     @Override
    127     public void onServiceDisconnected(ComponentName name) {
    128         // Ignored; we leave service in place for the background thread to
    129         // run into DeadObjectException
    130     }
    131 }
    132