实现BiandService

最新推荐文章于 2026-01-08 10:46:20 发布

原创最新推荐文章于 2026-01-08 10:46:20 发布 · 290 阅读

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本文详细介绍了 Android 中的 Binder 机制及其应用实例。通过一个具体的 BindService 示例，讲解了如何在 Android 应用中实现服务与客户端之间的通信，包括服务的创建、绑定以及数据交互的过程。

AndroidManifest.xml 注册

        <service 
            android:name="com.example.myservice.BindService">
            <intent-filter >
                <action android:name="yaosai.gogo"/>
            </intent-filter>
        </service>

继承了service的子类

public class BindService extends Service {
	//计数器及开关
	private int count;
	private boolean quit;
	private Mybinder mybinder = new Mybinder();
	//通过继承binder来实现IBinder的类  作为service的代理人，实现了客户端与service的绑定
	public class Mybinder extends Binder{
		public int getCount(){
			//获取service的运行状态count
			return count;
		}
	}
	//返回一个IBinder对象
	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		System.out.println("service is binded");
		return mybinder;
	}
	
	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		System.out.println("创建了oncreate");
		new Thread(new Runnable() {
			
			@Override
			public void run() {
				// TODO Auto-generated method stub
				while(!quit){
					try {
						Thread.sleep(1000);
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					count++;
				}
			}
		}).start();
		
	}
	//service 被断开连接时回调该方法 关闭连接
	@Override
	public boolean onUnbind(Intent intent) {
		// TODO Auto-generated method stub
		System.out.println("service is unbind");
		return super.onUnbind(intent);
	}
	//销毁
	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		this.quit = true;
		System.out.println("Service is Destroy");
	}
}

主方法开启service

public class MainActivity extends Activity {
	private Button startService;
	private Button stopService;
	private Button gerService;
	//一个service代理对象
	BindService.Mybinder binder;
	//一个监听访问者与service之间的连接情况
	private ServiceConnection conn  = new ServiceConnection() {
		//连接失败回调
		@Override
		public void onServiceDisconnected(ComponentName name) {
			// TODO Auto-generated method stub
			System.out.println("--onServiceDisconnected--");
		}
		//连接成功 回调
		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			// TODO Auto-generated method stub
			//返回service中onBind返回的binder对象
			binder= (Mybinder) service;
			
		}
	};
	@Override
	protected void onCreate(Bundle savedInstanceState) {
	
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		startService = (Button) findViewById(R.id.button1);
		stopService = (Button) findViewById(R.id.button2);
		gerService = (Button) findViewById(R.id.button3);
		final Intent intetn = new Intent();
		intetn.setAction("yaosai.gogo");
		startService.setOnClickListener(new OnClickListener() {
		
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				//开启service   ① 意图 ② ServiceConnection ③是否创建
				bindService(intetn, conn, Service.BIND_AUTO_CREATE);
			}
		});
		stopService.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				//关闭
				unbindService(conn);
			}
		});
		gerService.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				//根据代理binder获得数据
				Toast.makeText(MainActivity.this, "count的值："+binder.getCount(), Toast.LENGTH_SHORT).show();
			}
		});
	}




}