Android服務(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: * 採用startService()方法啟動服務 * 在此只是簡單地類比該過程 */public class MainActivity extends Activity {    private Button mStartButton;    private Button mStopButton;    private Intent intent;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);init();}    private void init(){    intent=new Intent();    intent.setAction("cc.test.com");        //開啟服務    mStartButton=(Button) findViewById(R.id.startButton);    mStartButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View view) {startService(intent);}});        //終止服務    mStopButton=(Button) findViewById(R.id.stopButton);    mStopButton.setOnClickListener(new OnClickListener() {@Overridepublic 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 {@Overridepublic IBinder onBind(Intent arg0) {return null;}public void onCreate() {System.out.println("---> Service onCreate()");}@Overridepublic void onStart(Intent intent, int startId) {super.onStart(intent, startId);System.out.println("---> Service onStart()");}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {System.out.println("---> Service onStartCommand()");return super.onStartCommand(intent, flags, startId);}@Overridepublic 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="啟動Service"      />          <Button        android:id="@+id/stopButton"        android:layout_width="200dip"        android:layout_height="150dip"        android:text="停止Service"       /></LinearLayout>