【学习笔记】服务的生命周期

￡神魔★判官ぃ 2022-08-24 01:54 130阅读 0赞

<pre name="code" class="java">package com.example.service;
    
    import android.os.Bundle;
    import android.os.IBinder;
    import android.app.Activity;
    import android.content.ComponentName;
    import android.content.Intent;
    import android.content.ServiceConnection;
    import android.view.Menu;
    import android.view.View;
    
    public class MainActivity extends Activity {
    	private ServiceConnection conn ;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    	}
    
    	@Override
    	public boolean onCreateOptionsMenu(Menu menu) {
    		// Inflate the menu; this adds items to the action bar if it is present.
    		getMenuInflater().inflate(R.menu.main, menu);
    		return true;
    	}
    
    	public void startservice(View v){
    		//启动服务
    		Intent intent = new Intent(this, MyService.class);
    		startService(intent);
    	}
    	
    	public void stopservice(View v){
    		Intent intent = new Intent(this, MyService.class);
    		stopService(intent);
    	}
    	
    	public void bindservice(View v){
    		Intent intent = new Intent(this, MyService.class);
    		conn = new MyServiceConnection();
    		bindService(intent, conn, BIND_AUTO_CREATE);
    	}
    	
    	private final class MyServiceConnection implements ServiceConnection{
    
    		@Override
    		public void onServiceConnected(ComponentName name, IBinder service) {
    		}
    
    		@Override
    		public void onServiceDisconnected(ComponentName name) {
    		}
    	}
    	public void unbindservice(View v){
     		unbindService(conn);
     		conn = null;
    	}
    	
    	@Override
    	protected void onDestroy() {
    		super.onDestroy();
    		if(conn!=null){
    			unbindService(conn);
    			conn = null;
    		}
    	}
    }

<pre name="code" class="java">package com.example.service;
    
    import android.app.Service;
    import android.content.Intent;
    import android.os.IBinder;
    import android.util.Log;
    
    public class MyService extends Service {
    
    	@Override
    	public void onCreate() {
    		// TODO Auto-generated method stub
    		super.onCreate();
    		Log.i("i", "oncreate()");
    	}
    	
    	@Override
    	public void onStart(Intent intent, int startId) {
    		// TODO Auto-generated method stub
    		super.onStart(intent, startId);
    		Log.i("i", "onStart()");
    	}
    	
    	@Override
    	public void onDestroy() {
    		// TODO Auto-generated method stub
    		super.onDestroy();
    		Log.i("i", "onDestroy()");
    	}
    	
    	@Override
    	public IBinder onBind(Intent intent) {
    		// TODO Auto-generated method stub
    		Log.i("i", "onBind()");
    		return null;
    	}
    
    	@Override
    	public boolean onUnbind(Intent intent) {
    		// TODO Auto-generated method stub
    		Log.i("i", "onUnBind()");
    		return super.onUnbind(intent);
    	}
    }