1/*
2 * Copyright (C) 2009 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.batterywaster;
18
19import android.app.Activity;
20import android.content.BroadcastReceiver;
21import android.content.Context;
22import android.content.Intent;
23import android.content.IntentFilter;
24import android.os.BatteryManager;
25import android.os.Bundle;
26import android.os.PowerManager;
27import android.view.View;
28import android.view.WindowManager;
29import android.widget.CheckBox;
30import android.widget.TextView;
31
32import java.text.DateFormat;
33import java.util.Date;
34
35/**
36 * So you thought sync used up your battery life.
37 */
38public class BatteryWaster extends Activity {
39    TextView mLog;
40    DateFormat mDateFormat;
41    IntentFilter mFilter;
42    PowerManager.WakeLock mPartialWakeLock;
43    SpinThread mThread;
44
45    boolean mWasting, mWaking;
46
47    @Override
48    public void onCreate(Bundle savedInstanceState) {
49        super.onCreate(savedInstanceState);
50
51        // Set the layout for this activity.  You can find it
52        // in res/layout/hello_activity.xml
53        setContentView(R.layout.battery_waster);
54
55        findViewById(R.id.checkbox).setOnClickListener(mClickListener);
56        findViewById(R.id.checkbox_wake).setOnClickListener(mWakeClickListener);
57        mLog = (TextView)findViewById(R.id.log);
58
59        mDateFormat = DateFormat.getInstance();
60
61        mFilter = new IntentFilter();
62        mFilter.addAction(Intent.ACTION_BATTERY_CHANGED);
63        mFilter.addAction(Intent.ACTION_BATTERY_LOW);
64        mFilter.addAction(Intent.ACTION_BATTERY_OKAY);
65        mFilter.addAction(Intent.ACTION_POWER_CONNECTED);
66
67        PowerManager pm = (PowerManager)getSystemService(POWER_SERVICE);
68        mPartialWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "BatteryWaster");
69        mPartialWakeLock.setReferenceCounted(false);
70    }
71
72    @Override
73    public void onResume() {
74        super.onResume();
75        if (((CheckBox)findViewById(R.id.checkbox)).isChecked()) {
76            startRunning();
77        }
78        if (((CheckBox)findViewById(R.id.checkbox_wake)).isChecked()) {
79            mWaking = true;
80            updateWakeLock();
81        }
82    }
83
84    @Override
85    public void onDestroy() {
86        super.onDestroy();
87        stopRunning();
88        if (mPartialWakeLock.isHeld()) {
89            mPartialWakeLock.release();
90        }
91    }
92
93    View.OnClickListener mClickListener = new View.OnClickListener() {
94        public void onClick(View v) {
95            CheckBox checkbox = (CheckBox)v;
96            if (checkbox.isChecked()) {
97                startRunning();
98            } else {
99                stopRunning();
100            }
101        }
102    };
103
104    View.OnClickListener mWakeClickListener = new View.OnClickListener() {
105        public void onClick(View v) {
106            CheckBox checkbox = (CheckBox)v;
107            if (checkbox.isChecked()) {
108                mWaking = true;
109                updateWakeLock();
110            } else {
111                mWaking = false;
112                updateWakeLock();
113            }
114        }
115    };
116
117    void startRunning() {
118        if (!mWasting) {
119            log("Start");
120            registerReceiver(mReceiver, mFilter);
121            mWasting = true;
122            updateWakeLock();
123            if (mThread == null) {
124                mThread = new SpinThread();
125                mThread.start();
126            }
127        }
128    }
129
130    void stopRunning() {
131        if (mWasting) {
132            log("Stop");
133            unregisterReceiver(mReceiver);
134            mWasting = false;
135            updateWakeLock();
136            if (mThread != null) {
137                mThread.quit();
138                mThread = null;
139            }
140        }
141    }
142
143    void updateWakeLock() {
144        if (mWasting) {
145            getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
146        } else {
147            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
148        }
149        if (mWaking) {
150            if (!mPartialWakeLock.isHeld()) {
151                mPartialWakeLock.acquire();
152            }
153        } else {
154            if (mPartialWakeLock.isHeld()) {
155                mPartialWakeLock.release();
156            }
157        }
158    }
159
160    void log(String s) {
161        mLog.setText(mLog.getText() + "\n" + mDateFormat.format(new Date()) + ": " + s);
162    }
163
164    BroadcastReceiver mReceiver = new BroadcastReceiver() {
165        public void onReceive(Context context, Intent intent) {
166            String action = intent.getAction();
167            String title = action;
168            int index = title.lastIndexOf('.');
169            if (index >= 0) {
170                title = title.substring(index + 1);
171            }
172            if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {
173                int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
174                log(title + ": level=" + level);
175            } else {
176                log(title);
177            }
178        }
179    };
180
181    class SpinThread extends Thread {
182        private boolean mStop;
183
184        public void quit() {
185            synchronized (this) {
186                mStop = true;
187            }
188        }
189
190        public void run() {
191            while (true) {
192                synchronized (this) {
193                    if (mStop) {
194                        return;
195                    }
196                }
197            }
198        }
199    }
200}
201
202
203