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
17package com.android.fakeoemfeatures;
18
19import java.util.ArrayList;
20import java.util.Random;
21
22import android.app.Dialog;
23import android.app.Service;
24import android.content.Context;
25import android.content.Intent;
26import android.os.Handler;
27import android.os.IBinder;
28import android.os.Message;
29import android.view.Display;
30import android.view.ViewGroup;
31import android.view.WindowManager;
32
33public 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