Android 屏幕常亮、低电量监听

Android保持屏幕常亮只需在manifest文件注册权限并使用PowerManager进行管理：

 <uses-permission android:name="android.permission.WAKE_LOCK"/>

import android.os.PowerManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    private PowerManager pm;
    private PowerManager.WakeLock wakeLock;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        pm = (PowerManager) getSystemService(POWER_SERVICE);
        wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "Wake");

    }

    @Override
    protected void onResume() {
        super.onResume();

        wakeLock.acquire();//启用
    }

    @Override
    protected void onPause() {
        super.onPause();

        wakeLock.release();//释放
    }
}

Android低电量监听，设置广播的<action android:name="android.intent.action.BATTERY_LOW"/>即可。

       <receiver
            android:name=".LowPowerReceiver"
            android:enabled="true"
            android:exported="true" >
            <intent-filter>
                <action android:name="android.intent.action.BATTERY_LOW"/>
            </intent-filter>
        </receiver>