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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 static com.android.settings.deviceinfo.StorageSettings.TAG;
     20 
     21 import android.content.ComponentName;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.content.ServiceConnection;
     25 import android.net.TrafficStats;
     26 import android.os.AsyncTask;
     27 import android.os.IBinder;
     28 import android.os.RemoteException;
     29 import android.os.UserHandle;
     30 import android.os.storage.StorageManager;
     31 import android.os.storage.VolumeInfo;
     32 import android.telecom.Log;
     33 import android.text.format.DateUtils;
     34 import android.text.format.Formatter;
     35 
     36 import com.android.internal.app.IMediaContainerService;
     37 
     38 import java.util.concurrent.CountDownLatch;
     39 import java.util.concurrent.TimeUnit;
     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     private long mTimeMillis = -1;
     61 
     62     public MigrateEstimateTask(Context context) {
     63         mContext = context;
     64         mStorage = context.getSystemService(StorageManager.class);
     65     }
     66 
     67     public void copyFrom(Intent intent) {
     68         mSizeBytes = intent.getLongExtra(EXTRA_SIZE_BYTES, -1);
     69     }
     70 
     71     public void copyTo(Intent intent) {
     72         intent.putExtra(EXTRA_SIZE_BYTES, mSizeBytes);
     73     }
     74 
     75     @Override
     76     protected Long doInBackground(Void... params) {
     77         if (mSizeBytes != -1) {
     78             return mSizeBytes;
     79         }
     80 
     81         final VolumeInfo privateVol = mContext.getPackageManager().getPrimaryStorageCurrentVolume();
     82         final VolumeInfo emulatedVol = mStorage.findEmulatedForPrivate(privateVol);
     83 
     84         if (emulatedVol == null) {
     85             Log.w(TAG, "Failed to find current primary storage");
     86             return -1L;
     87         }
     88 
     89         final String path = emulatedVol.getPath().getAbsolutePath();
     90         Log.d(TAG, "Estimating for current path " + path);
     91 
     92         final Intent intent = new Intent().setComponent(DEFAULT_CONTAINER_COMPONENT);
     93         mContext.bindServiceAsUser(intent, this, Context.BIND_AUTO_CREATE, UserHandle.OWNER);
     94 
     95         try {
     96             if (mConnected.await(15, TimeUnit.SECONDS)) {
     97                 return mService.calculateDirectorySize(path);
     98             }
     99         } catch (InterruptedException | RemoteException e) {
    100             Log.w(TAG, "Failed to measure " + path);
    101         } finally {
    102             mContext.unbindService(this);
    103         }
    104 
    105         return -1L;
    106     }
    107 
    108     @Override
    109     protected void onPostExecute(Long result) {
    110         mSizeBytes = result;
    111         mTimeMillis = (mSizeBytes * DateUtils.SECOND_IN_MILLIS) / SPEED_ESTIMATE_BPS;
    112         mTimeMillis = Math.max(mTimeMillis, DateUtils.SECOND_IN_MILLIS);
    113 
    114         final String size = Formatter.formatFileSize(mContext, mSizeBytes);
    115         final String time = DateUtils.formatDuration(mTimeMillis).toString();
    116         onPostExecute(size, time);
    117     }
    118 
    119     public abstract void onPostExecute(String size, String time);
    120 
    121     @Override
    122     public void onServiceConnected(ComponentName name, IBinder service) {
    123         mService = IMediaContainerService.Stub.asInterface(service);
    124         mConnected.countDown();
    125     }
    126 
    127     @Override
    128     public void onServiceDisconnected(ComponentName name) {
    129         // Ignored; we leave service in place for the background thread to
    130         // run into DeadObjectException
    131     }
    132 }
    133