Android监听Home键、锁屏、解屏(落雨敏详细讲解)附源码

Bertha 。 2023-10-17 10:13 46阅读 0赞

**前言：最近做视频播放，发现当在播放时点击电源键进行锁屏，视频继续播放问题，于是通过广播进行监听。广播监听可以用于很多地方，在此落雨敏详细讲解Home键、锁屏、解屏的事件处理。先讲解思路，然后在一步一步实现，下面会贴出所有代码。**  
**第一：自定义一个类(如:MyBroadcastReceiver)；**  
 (1)、将内部类(广播类)作为MyBroadcastReceiver类的成员变量，方便activity使用  
(2)、对外接口类(如:ScreenStateListener)作为MyBroadcastReceiver类的成员变量  
(3)、接口具有home键、锁屏、解屏的状态方法  
(4)、注册广播(如方法:startObserver() ),添加对应的addAction  
(5)、注销广播 (如方法:endObserver()) ，调用unregisterReceiver()方法  
**第二:在内部类(如:ScreenBroadcastReceiver)实现，home键、锁屏、解屏监听**  
 (1)、得到状态，String action = intent.getAction();  
(2)、根据状态进行判断如下:  
开屏，if(Intent.ACTION\_SCREEN\_ON.equals(action))\{  
//这里进行调用开屏处理方法  
\}；  
锁屏，if(Intent.ACTION\_SCREEN\_OFF.equals(action))\{  
//这里进行调用锁屏处理方法  
\}；  
解锁，if(Intent.ACTION\_USER\_PRESENT.equals(action))\{  
//这里进行调用解锁处理方法  
\};  
home键，if(action.equals(Intent.ACTION\_CLOSE\_SYSTEM\_DIALOGS))\{  
//这里进行调用home键处理方法  
\};  
 **第三:在Activity中的调用**  
 (1)、声明成员变量  
private MyBroadcastReceiver broadcastReceiver;//自定义类  
private TextView tv;//记录状态，方便测试  
(2)、实列化自定义类中的接口

(3)、当前activity销毁时调用广播注销方法

**第四:xml代码，记录状态，方便测试**  
  
  
 <TextView  
android:id="@+id/tv"  
android:layout\_width="wrap\_content"  
android:layout\_height="wrap\_content"  
android:text="@string/hello\_world" />  
  
  
 **第五:广播权限**  
 <uses-permission android:name="android.permission.RECEIVE\_USER\_PRESENT"/>  
  
  
 **完整代码:----------------------------------------------------------------------------------------------**  
 **1、自定义类MyBroadcastReceiver**

package com.example.powertest;
    
    import android.annotation.SuppressLint;
    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.content.IntentFilter;
    import android.os.PowerManager;
    import android.util.Log;
    
    public class MyBroadcastReceiver{
    
    	 private Context mContext;
    	 private ScreenBroadcastReceiver mScreenReceiver;//内部类广播
    	 private ScreenStateListener mScreenStateListener;//对外接口
    	 
    	    public MyBroadcastReceiver(Context context) {
    	        mContext = context;
    	        mScreenReceiver = new ScreenBroadcastReceiver();
    	    }
    	    //注册广播与获取状态方法----
    	    public void startObserver(ScreenStateListener listener) {
    	        mScreenStateListener = listener;
    	        registerListener();//注册广播
    	        getScreenState();//获取状态
    	    }
    	    //注销广播方法----
    	    public void endObserver() {
    	        unregisterListener();
    	    }
    	
    	    //获取screen状态
    	    @SuppressLint("NewApi")
    	    private void getScreenState() {
    	        if (mContext == null) {
    	            return;
    	        }
    	 
    	        PowerManager manager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
    	        if (manager.isScreenOn()) {
    	            if (mScreenStateListener != null) {
    	                mScreenStateListener.onScreenOn();//屏幕开启
    	            }
    	        } 
    	        else {
    	            if (mScreenStateListener != null) {
    	                mScreenStateListener.onScreenOff();//屏幕关闭
    	            }
    	        }
    	    }
    	    //动态广播注册
    	    private void registerListener() {
    	        if (mContext != null) {
    	            IntentFilter filter = new IntentFilter();
    	            filter.addAction(Intent.ACTION_SCREEN_ON);
    	            filter.addAction(Intent.ACTION_SCREEN_OFF);
    	            filter.addAction(Intent.ACTION_USER_PRESENT);
    	            filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);//home键
    	            mContext.registerReceiver(mScreenReceiver, filter);
    	        }
    	    }
    	    //销毁广播
    	    private void unregisterListener() {
    	        if (mContext != null)
    	            mContext.unregisterReceiver(mScreenReceiver);
    	    }
    	 
    	     //---------------------广播-----------------------------
    	    private class ScreenBroadcastReceiver extends BroadcastReceiver {
    	        private String action = null;
    	 
    	        @Override
    	        public void onReceive(Context context, Intent intent) {
    	            action = intent.getAction();
    	         // ----------------开屏时调用---------------
    	            if (Intent.ACTION_SCREEN_ON.equals(action)) { 
    	                mScreenStateListener.onScreenOn();
    	            } 
    	            // ----------------锁屏时调用---------------
    	            else if (Intent.ACTION_SCREEN_OFF.equals(action)) { 
    	                mScreenStateListener.onScreenOff();
    	            } 
    	            // ----------------解锁时调用---------------
    	            else if (Intent.ACTION_USER_PRESENT.equals(action)) { 
    	                mScreenStateListener.onUserPresent();
    	            }
    	            // ----------------按home键时调用---------------
    	            else if(action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)){
    	            	 String reason = intent.getStringExtra("reason");
    	            	 if (reason !=null && mScreenStateListener !=null) {
    	            		 //短按home键
    	            		 if (reason.equals("homekey")) {
    	                           // 短按home键 
    	            			 mScreenStateListener.onHomePressed();
    	                       }
    	            		// 长按home键 
    	            		 else if(reason.equals("recentapps")){
    	            			 //mScreenStateListener.onHomePresseLong();//自己去写长按方法与短按类似
    	            		 }
    				      }
    	            	 
    	            } 	 
    	        }
    	    }
    	 
    	    public interface ScreenStateListener {// 返回给调用者屏幕状态信息
    	        public void onScreenOn();// 开屏
    	 
    	        public void onScreenOff();// 锁屏
    	 
    	        public void onUserPresent();// 解锁
    	        
    	        public void onHomePressed();// 解锁
    	    }
    	}

**2、Activity类--------------------------------------------------------------------------------------------------**

package com.example.powertest;
    
    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.util.Log;
    import android.widget.TextView;
    
    import com.example.powertest.MyBroadcastReceiver.ScreenStateListener;
    
    public class MainActivity extends Activity{
    	private MyBroadcastReceiver broadcastReceiver;
    	private TextView tv;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		init();
    		
    	}
        //初始化广播
    	private void init() {
    		tv=(TextView) findViewById(R.id.tv);
    		tv.setText("开始测试 : ");
    		broadcastReceiver=new MyBroadcastReceiver(this);
    		broadcastReceiver.startObserver(new ScreenStateListener() {
    			// 解锁---------------
    			@Override
    			public void onUserPresent() {
    				 String str=tv.getText()+"+";
    				 tv.setText(str+"解锁");	
    			}
    			// 锁屏---------------------
    			@Override
    			public void onScreenOn() {
    				 String str=tv.getText()+"+";
    				 tv.setText(str+"开屏");	
    			}
    			// 开屏-------------------------
    			@Override
    			public void onScreenOff() {
    				 String str=tv.getText()+"+";
    				 tv.setText(str+"锁屏");	
    			}
    			// home键-------------------------
    			@Override
    			public void onHomePressed() {
    				 String str=tv.getText()+"+";
    				 tv.setText(str+"home键");	
    				
    			}
    		});
    		
    		
        }
    		
    	@Override
    	protected void onDestroy() {
    		super.onDestroy();
    		if(broadcastReceiver!=null){
    			broadcastReceiver.endObserver();
    			Log.i("test", "注销");
    		}
    	}
    
    	
    
    }

**3、xml文件-------------------------------------------------------------------------------------------------------------**

**4、测试效果图------------------------------------------------------------------------------------**  
  
![Center][] ![Center 1][] ![Center 2][]  
  
  
  
  
 **5、源码地址（0分下载,完善代码注释，简单易懂）**  
**http://download.csdn.net/detail/lin857/9741332**

[Center]: https://img-blog.csdn.net/20170119141855250?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbGluODU3/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: https://img-blog.csdn.net/20170119141907402?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbGluODU3/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 2]: https://img-blog.csdn.net/20170119141919137?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbGluODU3/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center