android开发之Activity与Service绑定

我直接贴出代码 读者慢慢体会吧

接口

public interface ServiceInterface {
	public void show();
}

Service类

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

public class Service_01 extends Service {

	private final String TAG = "Service--->";

	private final IBinder binder = new MyBinder();
	
	MyBinder mybinder = new MyBinder();
	
	public class MyBinder extends Binder implements ServiceInterface {
		/*show只是测试方法，可以不要*/
		public void show() {
			Toast.makeText(Service_01.this, "MyName is Service_01",
					Toast.LENGTH_LONG).show();
		}
		/*返回service服务，方便activity中得到*/
		Service_01 getService() {
			return Service_01.this;
		}
	}
/////////////////以上是为了测试绑定功能而做的准备
	
/*	绑定时执行*/
	@Override
	public IBinder onBind(Intent intent) {
		Log.d(TAG, "onBind");
		return binder;
	}
	/*只在创建时执行一次*/
	@Override
	public void onCreate() {
		super.onCreate();
		Log.d(TAG, "onCreate");
	}
	/*断开绑定或者stopService时执行*/
	@Override
	public void onDestroy() {
		super.onDestroy();
		Log.d(TAG, "onDestroy");
	}

	 /* 当内存不够时执行改方法 */
	 @Override
	 public void onLowMemory() {
	 super.onLowMemory();
	 onDestroy();// 注销该service
	 }

	/* 当从新尝试绑定时执行 */
	@Override
	public void onRebind(Intent intent) {
		super.onRebind(intent);
		Log.d(TAG, "onRebind");
	}

	@Override
	public void onStart(Intent intent, int startId) {
		super.onStart(intent, startId);
		Log.d(TAG, "onStart");
	}

	/* ，每次startService都会执行该方法，而改方法执行后会自动执行onStart()方法 */
	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		Log.d(TAG, "onStartCommand-->flags=" + flags + "  startId=" + startId);
		
		return super.onStartCommand(intent, flags, startId);
	}
	/*断开绑定时执行*/
	@Override
	public boolean onUnbind(Intent intent) {
		Log.d(TAG, "onUnbind");
		return super.onUnbind(intent);
	}
}

Activity测试类

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class TestService extends Activity {
    /** Called when the activity is first created. */
	/*注册按钮*/
	private Button start = null;
	private Button stop = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        start = (Button)findViewById(R.id.button_01);
        start.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				/*绑定service*/
				Intent bindIntent = new Intent(TestService.this, Service_01.class);
				bindService(bindIntent, sconnection, Context.BIND_AUTO_CREATE);
			}
		});
        
        stop = (Button)findViewById(R.id.button_02);
        stop.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				/*断开绑定service*/
			    unbindService(sconnection);
			}
		});
    }
    private Service_01 serviceBinder;
   /* 注册接口方法*/
    ServiceInterface mService = null;
   /* 绑定service监听*/
	ServiceConnection sconnection = new ServiceConnection() {
		/*当绑定时执行*/
		public void onServiceConnected(ComponentName name, IBinder service) {
			Log.d("activity--->", "已绑定到service");
			mService = (ServiceInterface) service;
			if (mService != null) {
				mService.show();//测试方法
			}
			Intent intent = new Intent();//这里只是为了下面传intent对象而构建的，没有实际意义
			/*绑定后就可以使用Service的相关方法和属性来开始你对Service的操作*/
			serviceBinder = ((Service_01.MyBinder) service).getService();
			/*比如：你可以掉用Service的onStartCommand()方法*/
			serviceBinder.onStartCommand(intent, 0, 0);//0,0是我随意的参数
			
		}
		/*当断开绑定时执行，但调用unbindService()时不会触发改方法*/
		public void onServiceDisconnected(ComponentName name) {
			Log.d("activity--->", "已断开绑定service");
		}
	};
}

希望对读者有所帮助