Android 获取设备电池电量

注册广播接收器：

homeFilter = new IntentFilter();homeFilter.addAction(Intent.ACTION_BATTERY_CHANGED);registerReceiver(homeReceiver, homeFilter);

广播接收ACTION_BATTERY_CHANGED：

private BroadcastReceiver homeReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {                int rawLevel = intent.getIntExtra("level", -1);                int scale = intent.getIntExtra("scale", -1);                int status = intent.getIntExtra("status", -1);                int health = intent.getIntExtra("health", -1);                MyLog.i("[HomeReceiver]rawLevel:" + rawLevel + ",scale:"                        + scale + ",status:" + status + ",health:" + health);                switch (status) {                case BatteryManager.BATTERY_STATUS_UNKNOWN:                    setBatteryImageByLevel(0);                    break;                case BatteryManager.BATTERY_STATUS_CHARGING:                    break;                case BatteryManager.BATTERY_STATUS_DISCHARGING:                case BatteryManager.BATTERY_STATUS_NOT_CHARGING:                    if (rawLevel >= 0 && rawLevel <= 100) {                        int level = (int) (rawLevel / 10.0);                        setBatteryImageByLevel(level);                    }                    break;                case BatteryManager.BATTERY_STATUS_FULL:                    setBatteryImageByLevel(10);                    break;                default:                    break;                }            }        }    };

设置电池图标：

    /**     * 设置电池图标     *      * @param level     *            0-10     */    private void setBatteryImageByLevel(int level) {        MyLog.i("[setBatteryImageByLevel]:" + level);        if (level >= 0 && level <= 10) {            int batteryResId = getResources().getIdentifier(                    "home_battery_" + level, "drawable", getPackageName());            imageBattery.setImageResource(batteryResId);        }    }

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