BatteryController.java revision 209bede6b9edb9171e5bee4077b48e35004a37b4 
1/*
2 * Copyright (C) 2010 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.systemui.statusbar.policy;
18
19import android.content.BroadcastReceiver;
20import android.content.Context;
21import android.content.Intent;
22import android.content.IntentFilter;
23import android.os.BatteryManager;
24import android.widget.ImageView;
25import android.widget.TextView;
26
27import com.android.systemui.R;
28
29import java.util.ArrayList;
30
31public class BatteryController extends BroadcastReceiver {
32    private static final String TAG = "StatusBar.BatteryController";
33
34    private Context mContext;
35    private ArrayList<ImageView> mIconViews = new ArrayList<ImageView>();
36    private ArrayList<TextView> mLabelViews = new ArrayList<TextView>();
37
38    private ArrayList<BatteryStateChangeCallback> mChangeCallbacks =
39            new ArrayList<BatteryStateChangeCallback>();
40
41    public interface BatteryStateChangeCallback {
42        public void onBatteryLevelChanged(int level, boolean pluggedIn);
43    }
44
45    public BatteryController(Context context) {
46        mContext = context;
47
48        IntentFilter filter = new IntentFilter();
49        filter.addAction(Intent.ACTION_BATTERY_CHANGED);
50        context.registerReceiver(this, filter);
51    }
52
53    public void addIconView(ImageView v) {
54        mIconViews.add(v);
55    }
56
57    public void addLabelView(TextView v) {
58        mLabelViews.add(v);
59    }
60
61    public void addStateChangedCallback(BatteryStateChangeCallback cb) {
62        mChangeCallbacks.add(cb);
63    }
64
65    public void onReceive(Context context, Intent intent) {
66        final String action = intent.getAction();
67        if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
68            final int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
69            final int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS,
70                    BatteryManager.BATTERY_STATUS_UNKNOWN);
71
72            boolean plugged = false;
73            switch (status) {
74                case BatteryManager.BATTERY_STATUS_CHARGING:
75                case BatteryManager.BATTERY_STATUS_FULL:
76                    plugged = true;
77                    break;
78            }
79
80            final int icon = plugged ? R.drawable.stat_sys_battery_charge
81                                     : R.drawable.stat_sys_battery;
82
83            int N = mIconViews.size();
84            for (int i=0; i<N; i++) {
85                ImageView v = mIconViews.get(i);
86                v.setImageResource(icon);
87                v.setImageLevel(level);
88                v.setContentDescription(mContext.getString(R.string.accessibility_battery_level,
89                        level));
90            }
91            N = mLabelViews.size();
92            for (int i=0; i<N; i++) {
93                TextView v = mLabelViews.get(i);
94                v.setText(mContext.getString(R.string.status_bar_settings_battery_meter_format,
95                        level));
96            }
97
98            for (BatteryStateChangeCallback cb : mChangeCallbacks) {
99                cb.onBatteryLevelChanged(level, plugged);
100            }
101        }
102    }
103}
104