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      1 /*
      2  * Copyright (C) 2012 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.fakeoemfeatures;
     18 
     19 import java.util.ArrayList;
     20 import java.util.Random;
     21 
     22 import android.app.Dialog;
     23 import android.app.Service;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import android.os.Handler;
     27 import android.os.IBinder;
     28 import android.os.Message;
     29 import android.view.Display;
     30 import android.view.ViewGroup;
     31 import android.view.WindowManager;
     32 
     33 public class FakeBackgroundService extends Service {
     34     final ArrayList<int[]> mAllocs = new ArrayList<int[]>();
     35 
     36     final Random mRandom = new Random();
     37 
     38     static final long TICK_DELAY = 30*1000; // 30 seconds
     39     static final int MSG_TICK = 1;
     40     final Handler mHandler = new Handler() {
     41         @Override public void handleMessage(Message msg) {
     42             switch (msg.what) {
     43                 case MSG_TICK:
     44                     // We are awesome!  To prove we are doing awesome stuff,
     45                     // we must use some memory!  It wouldn't be awesome if
     46                     // we didn't use memory!
     47                     for (int i=0; i<5; i++) {
     48                         try {
     49                             int[] alloc = new int[FakeApp.PAGE_SIZE/4];
     50                             mAllocs.add(alloc);
     51                             final int VAL = mRandom.nextInt();
     52                             for (int j=0; j<FakeApp.PAGE_SIZE/4; j++) {
     53                                 alloc[j] = VAL;
     54                             }
     55                         } catch (OutOfMemoryError e) {
     56                         }
     57                     }
     58                     sendEmptyMessageDelayed(MSG_TICK, TICK_DELAY);
     59                     break;
     60                 default:
     61                     super.handleMessage(msg);
     62                     break;
     63             }
     64         }
     65     };
     66 
     67     @Override public void onCreate() {
     68         super.onCreate();
     69         mHandler.sendEmptyMessageDelayed(MSG_TICK, TICK_DELAY);
     70 
     71         final WindowManager wm = (WindowManager)getSystemService(Context.WINDOW_SERVICE);
     72         final Display display = wm.getDefaultDisplay();
     73 
     74         // Make a fake window that is always around eating graphics resources.
     75         FakeView view = new FakeView(this);
     76         Dialog dialog = new Dialog(this, android.R.style.Theme_Holo_Dialog);
     77         dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
     78         dialog.getWindow().setFlags(
     79                 WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
     80                 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
     81                 | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
     82                 | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
     83                 WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
     84                 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
     85                 | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
     86                 | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED
     87                 | WindowManager.LayoutParams.FLAG_DIM_BEHIND);
     88         dialog.getWindow().setDimAmount(0);
     89         dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
     90                 ViewGroup.LayoutParams.MATCH_PARENT);
     91         WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();
     92         int maxSize = display.getMaximumSizeDimension();
     93         maxSize *= 2;
     94         lp.x = maxSize;
     95         lp.y = maxSize;
     96         lp.setTitle(getPackageName() + ":background");
     97         dialog.getWindow().setAttributes(lp);
     98         dialog.getWindow().setContentView(view);
     99         dialog.show();
    100     }
    101 
    102     @Override public void onDestroy() {
    103         super.onDestroy();
    104         mHandler.removeMessages(MSG_TICK);
    105     }
    106 
    107     @Override public IBinder onBind(Intent intent) {
    108         return null;
    109     }
    110 }
    111