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[操作系统]Android 监听锁屏、解锁、开屏 操作


1、首先定义 ScreenListener 

package com.app.lib;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.PowerManager;/** * Created by ${zyj} on 2016/6/21. */public class ScreenListener {  private Context mContext;  private ScreenBroadcastReceiver mScreenReceiver;  private ScreenStateListener mScreenStateListener;  public ScreenListener(Context context) {    mContext = context;    mScreenReceiver = new ScreenBroadcastReceiver();  }  /**   * screen状态广播接收者   */  private class ScreenBroadcastReceiver extends BroadcastReceiver {    private String action = null;    @Override    public void onReceive(Context context, Intent intent) {      action = intent.getAction();      if (Intent.ACTION_SCREEN_ON.equals(action)) { // 开屏        mScreenStateListener.onScreenOn();      } else if (Intent.ACTION_SCREEN_OFF.equals(action)) { // 锁屏        mScreenStateListener.onScreenOff();      } else if (Intent.ACTION_USER_PRESENT.equals(action)) { // 解锁        mScreenStateListener.onUserPresent();      }    }  }  /**   * 开始监听screen状态   *   * @param listener   */  public void begin(ScreenStateListener listener) {    mScreenStateListener = listener;    registerListener();    getScreenState();  }  /**   * 获取screen状态   */  private void getScreenState() {    PowerManager manager = (PowerManager) mContext        .getSystemService(Context.POWER_SERVICE);    if (manager.isScreenOn()) {      if (mScreenStateListener != null) {        mScreenStateListener.onScreenOn();      }    } else {      if (mScreenStateListener != null) {        mScreenStateListener.onScreenOff();      }    }  }  /**   * 停止screen状态监听   */  public void unregisterListener() {    mContext.unregisterReceiver(mScreenReceiver);  }  /**   * 启动screen状态广播接收器   */  private void registerListener() {    IntentFilter filter = new IntentFilter();    filter.addAction(Intent.ACTION_SCREEN_ON);    filter.addAction(Intent.ACTION_SCREEN_OFF);    filter.addAction(Intent.ACTION_USER_PRESENT);    mContext.registerReceiver(mScreenReceiver, filter);  }  public interface ScreenStateListener {// 返回给调用者屏幕状态信息    public void onScreenOn();    public void onScreenOff();    public void onUserPresent();  }}

 2、使用

package com.app.lib;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Toast;public class MainActivity extends AppCompatActivity {  private ScreenListener screenListener ;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    screenListener = new ScreenListener( MainActivity.this ) ;    screenListener.begin(new ScreenListener.ScreenStateListener() {      @Override      public void onScreenOn() {        Toast.makeText( MainActivity.this , "屏幕打开了" , Toast.LENGTH_SHORT ).show();      }      @Override      public void onScreenOff() {        Toast.makeText( MainActivity.this , "屏幕关闭了" , Toast.LENGTH_SHORT ).show();      }      @Override      public void onUserPresent() {        Toast.makeText( MainActivity.this , "解锁了" , Toast.LENGTH_SHORT ).show();      }    });  }}