服务(Service)全解析(一)--startService

MainActivity如下:

package cn.testservice1;

import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.app.Activity;
import android.content.Intent;
/**
 * Demo描述:
 * 采用startService()方法启动服务
 * 在此只是简单地模拟该过程
 */
public class MainActivity extends Activity {
    private Button mStartButton;
    private Button mStopButton;
    private Intent intent;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();
	}
    private void init(){
    	intent=new Intent();
    	intent.setAction("cc.test.com");
    	
    	//开启服务
    	mStartButton=(Button) findViewById(R.id.startButton);
    	mStartButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View view) {
				startService(intent);
			}
		});
    	
    	//终止服务
    	mStopButton=(Button) findViewById(R.id.stopButton);
    	mStopButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View view) {
				stopService(intent);
			}
		});
    }
	

}

ServiceSubclass如下:

package cn.testservice1;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;

public class ServiceSubclass extends Service {

	@Override
	public IBinder onBind(Intent arg0) {
		return null;
	}
	
	public void onCreate() {
		System.out.println("---> Service onCreate()");
	}
	
	@Override
	public void onStart(Intent intent, int startId) {
		super.onStart(intent, startId);
		System.out.println("---> Service onStart()");
	}
	
	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		System.out.println("---> Service onStartCommand()");
		return super.onStartCommand(intent, flags, startId);
	}
	
	@Override
	public void onDestroy() {
		super.onDestroy();
		System.out.println("---> Service onDestroy()");
	}

	
}

main.xml如下:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal"
   >

    <Button
        android:id="@+id/startButton"
        android:layout_width="200dip"
        android:layout_height="150dip"
        android:text="启动Service" 
     />
    
      <Button
        android:id="@+id/stopButton"
        android:layout_width="200dip"
        android:layout_height="150dip"
        android:text="停止Service" 
      />

</LinearLayout>