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  • Service的生命周期

    Service的生命周期
       Service的生命周期例如以下
     第一种:Call to startService()方法->onCreate()->onStartCommand()->service running-

    >onDestory->service shut down)


    案例:
    第一步

    在布局文件加入两个button

    <Button
            android:id="@+id/start_service"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="32dp"
            android:onClick="dostartService"
            android:text="启动simpleService" />
    
        <Button
            android:id="@+id/stop_service"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/start_service"
            android:layout_marginTop="51dp"
            android:onClick="dostopService"
            android:text="停止simpleService" />
    
    第二步创建SimpleService类继承Service
    package com.example.simpleservice;
    
    import android.app.Service;
    import android.content.Intent;
    import android.os.IBinder;
    import android.util.Log;
    
    public class SimpleService extends Service{
    	private  String  tag ="simpleService";
    	@Override
    	public void onCreate() {
    
    		Log.d(tag, "simpleserviece ->onCreate()");
    		super.onCreate();
    	}
    	@Override
    	public int onStartCommand(Intent intent, int flags, int startId) {
    
    		Log.d(tag, "simpleserviece ->onStartCommand");
    		return super.onStartCommand(intent, flags, startId);
    	}
    	@Override
    	public void onDestroy() {
    		Log.d(tag, "simpleserviece ->onDestroy()");
    
    		super.onDestroy();
    	}
    
    	@Override
    	public IBinder onBind(Intent intent) {
    
    		return null;
    	}
    
    }

    第三步配置文件在<application>节点下增加子节点(与activity节点平级):
    <service android:name="com.example.simpleservice.SimpleService" >
            </service>

    第四步在MainActivity中增加button点击方法:

    public class MainActivity extends Activity {
    
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    
    	}
    	public void dostartService(View v){
    		Intent intent = new Intent(this, SimpleService.class);
    		startService(intent);
    	}
    	public void dostopService(View v){
    		Intent intent = new Intent(this, SimpleService.class);
    		stopService(intent);
    	}
    }
    


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  • 原文地址:https://www.cnblogs.com/gavanwanggw/p/7190560.html
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