android service基本操作

service 四大组件之一，开启后可以一直运行在系统后台。至于其他概念性问题我就不说了，直接操作把  具体内容在代码注释中有

先看下效果图

上布局文件把

<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"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="启动服务"
        android:onClick="startService" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         android:text="停止服务"
        android:onClick="stopService" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         android:text="绑定服务"
        android:onClick="bindService" />

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="解绑服务"
        android:onClick="unbindService" />

</LinearLayout>

重点看java代码把

package com.zw.service;

import android.os.Bundle;
import android.os.IBinder;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {

	private Intent intent;
	private MyServiceCon conn = new MyServiceCon();
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		intent = new Intent("com.zw.service.MyService");
//		Intent intent = new Intent(this,MyService.class);
	}
	public void startService(View v){
		startService(intent);
	}
	
	public void stopService(View v){
		stopService(intent);
	}
	
	//绑定服务
	public void bindService(View v){
		bindService(intent, conn, Context.BIND_AUTO_CREATE);
	}
	
	public void unbindService(View v){
		unbindService(conn);
	}
	//
	class MyServiceCon implements ServiceConnection{

		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			//绑定完成后回调方法（Activity） 和 Service 的连接
						
		}

		@Override
		public void onServiceDisconnected(ComponentName name) {
			//服务解绑就调
		}
		
	}
}

　　service类

package com.zw.service;

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

public class MyService extends Service {

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		System.out.println("MyService-----onCreate");
	}
	@Override
	public void onStart(Intent intent, int startId) {
		// TODO Auto-generated method stub
		super.onStart(intent, startId);
		System.out.println("MyService-----onStart");
	}
	
	@Override
	public IBinder onBind(Intent arg0) {
		System.out.println("MyService-----onBind");
		return null;
	}

	@Override
	public boolean onUnbind(Intent intent) {
		System.out.println("MyService-----onUnbind");
		return super.onUnbind(intent);
	}
	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
		System.out.println("MyService-----onDestroy");
		super.onDestroy();
	}
}

　　接下来要说的是在清单文件中配置service

  <service android:name="com.zw.service.MyService">
            <intent-filter >
                <action android:name="com.zw.service.MyService"/>                
            </intent-filter>
        </service>

好了 效果图自己运行看看把