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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.app.usage.ExternalStorageStats;
     22 import android.app.usage.StorageStatsManager;
     23 import android.content.Context;
     24 import android.content.Intent;
     25 import android.content.pm.UserInfo;
     26 import android.net.TrafficStats;
     27 import android.os.AsyncTask;
     28 import android.os.UserHandle;
     29 import android.os.UserManager;
     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 java.io.IOException;
     37 import java.util.UUID;
     38 
     39 public abstract class MigrateEstimateTask extends AsyncTask<Void, Void, Long> {
     40     private static final String EXTRA_SIZE_BYTES = "size_bytes";
     41 
     42     /**
     43      * Assume roughly a Class 10 card.
     44      */
     45     private static final long SPEED_ESTIMATE_BPS = 10 * TrafficStats.MB_IN_BYTES;
     46 
     47     private final Context mContext;
     48 
     49     private long mSizeBytes = -1;
     50 
     51     public MigrateEstimateTask(Context context) {
     52         mContext = context;
     53     }
     54 
     55     public void copyFrom(Intent intent) {
     56         mSizeBytes = intent.getLongExtra(EXTRA_SIZE_BYTES, -1);
     57     }
     58 
     59     public void copyTo(Intent intent) {
     60         intent.putExtra(EXTRA_SIZE_BYTES, mSizeBytes);
     61     }
     62 
     63     @Override
     64     protected Long doInBackground(Void... params) {
     65         if (mSizeBytes != -1) {
     66             return mSizeBytes;
     67         }
     68 
     69         final UserManager user = mContext.getSystemService(UserManager.class);
     70         final StorageManager storage = mContext.getSystemService(StorageManager.class);
     71         final StorageStatsManager stats = mContext.getSystemService(StorageStatsManager.class);
     72 
     73         final VolumeInfo privateVol = mContext.getPackageManager().getPrimaryStorageCurrentVolume();
     74         final VolumeInfo emulatedVol = storage.findEmulatedForPrivate(privateVol);
     75 
     76         if (emulatedVol == null) {
     77             Log.w(TAG, "Failed to find current primary storage");
     78             return -1L;
     79         }
     80 
     81         try {
     82             final UUID emulatedUuid = storage.getUuidForPath(emulatedVol.getPath());
     83             Log.d(TAG, "Measuring size of " + emulatedUuid);
     84 
     85             long size = 0;
     86             for (UserInfo u : user.getUsers()) {
     87                 final ExternalStorageStats s = stats.queryExternalStatsForUser(emulatedUuid,
     88                         UserHandle.of(u.id));
     89                 size += s.getTotalBytes();
     90                 if (u.id == UserHandle.USER_SYSTEM) {
     91                     size += s.getObbBytes();
     92                 }
     93             }
     94             return size;
     95         } catch (IOException e) {
     96             Log.w(TAG, "Failed to measure", e);
     97             return -1L;
     98         }
     99     }
    100 
    101     @Override
    102     protected void onPostExecute(Long result) {
    103         mSizeBytes = result;
    104         long timeMillis = (mSizeBytes * DateUtils.SECOND_IN_MILLIS) / SPEED_ESTIMATE_BPS;
    105         timeMillis = Math.max(timeMillis, DateUtils.SECOND_IN_MILLIS);
    106 
    107         final String size = Formatter.formatFileSize(mContext, mSizeBytes);
    108         final String time = DateUtils.formatDuration(timeMillis).toString();
    109         onPostExecute(size, time);
    110     }
    111 
    112     public abstract void onPostExecute(String size, String time);
    113 }
    114