在Android中获取电池电量和状态

// 在Activity或Service中注册广播接收器
IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
BatteryReceiver receiver = new BatteryReceiver();
registerReceiver(receiver, filter);

// 广播接收器
public class BatteryReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        int batteryLevel = (int) ((level / (float) scale) * 100);
        // batteryLevel即为当前电量
    }
}

// 在Activity或Service中注册广播接收器
IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
BatteryReceiver receiver = new BatteryReceiver();
registerReceiver(receiver, filter);

// 广播接收器
public class BatteryReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
        boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
                status == BatteryManager.BATTERY_STATUS_FULL;
        // isCharging即为当前是否正在充电
    }
}