Service
AndroidManifest.xml(注册服务)
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<span style="color:#ff0000;"> <service android:name=".MyService"></service></span>
</application>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1. 测试启动本地服务"
android:textSize="25sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="@+id/button1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="startMyService"
android:text="启动服务" />
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="stopMyService"
android:text="停止服务" />
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2. 测试绑定本地服务"
android:textSize="25sp"
android:layout_marginTop="10dp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="bindMyService"
android:text="绑定服务" />
<Button
android:id="@+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="unbindMyService"
android:text="解绑服务" />
</LinearLayout>
</LinearLayout>
MainActivity.java
package com.example.l07_service;
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.widget.Toast;
import com.example.l07_service.MyService.MyBinder;
public class MainActivity extends Activity {
private ServiceConnection conn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
/**
* startMyService
*/
public void startMyService(View view) {
Intent intent = new Intent(this, MyService.class);
startService(intent);
Log.i("startMyService", "startMyService");
Toast.makeText(this, "启动服务成功!", 0).show();
}
/**
* stopMyService
*/
public void stopMyService(View view) {
Intent intent = new Intent(this, MyService.class);
stopService(intent);
Log.i("stopMyService", "stopMyService");
Toast.makeText(this, "停止服务成功!", 0).show();
}
/**
* bindMyService
*/
private MyService myService;
public void bindMyService(View view) {
Intent intent = new Intent(this, MyService.class);
// 创建ServiceConnection对象--绑定服务必须使activity与服务相关联
if (conn==null) {
conn = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {
Log.i("onServiceDisconnected", "onServiceDisconnected");
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
MyService.MyBinder binder = (MyBinder) service;
myService = binder.getService();
Log.i("onServiceConnected", "onServiceConnected");
}
};
//第三个参数是一个标志位，这里传入BIND_AUTO_CREATE表示在Activity和Service建立关联后自动创建Service，这会使得MyService中的onCreate()方法得到执行，但onStartCommand()方法不会执行。
bindService(intent, conn, Context.BIND_AUTO_CREATE);
Toast.makeText(this, "绑定服务成功!", 0).show();
}
}
/**
* unbindMyService 后面的(不要反复的做)
*/
public void unbindMyService(View view) {
if (conn != null) {
// 解绑定Service
unbindService(conn);
conn = null;
Toast.makeText(this, "解绑服务成功!", 0).show();
} else {
Toast.makeText(this, "还没有绑定服务成功!", 0).show();
}
}
/**
* 在退出之前调用 后面的(不要反复的做)
*/
@Override
protected void onDestroy() {
super.onDestroy();
if (conn != null) {
// 解绑定Service
unbindService(conn);
conn = null;
}
}
}
MyService.java
package com.example.l07_service;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
public class MyService extends Service {
//构造服务
public MyService() {
Log.i("MyService", "MyService()");
}
//创建服务
@Override
public void onCreate() {
super.onCreate();
Log.i("onCreate", "onCreate");
}
//
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("onStartCommand", "onStartCommand()");
return super.onStartCommand(intent, flags, startId);
}
//绑定服务--并且返回绑定对象，不然绑定失败
@Override
public IBinder onBind(Intent intent) {
Log.i("onBind", "onBind()");
return new MyBinder();
}
/*
* 自定义Binder
*/
public class MyBinder extends Binder {
public MyService getService() {
return MyService.this;
}
}
//解绑服务
@Override
public boolean onUnbind(Intent intent) {
Log.i("onUnbind", "onUnbind");
return super.onUnbind(intent);
}
//销毁服务
@Override
public void onDestroy() {
super.onDestroy();
Log.i("onDestroy", "onDestroy");
}
}
测试Service的生命周期:(直接copy)
startService()
第一次
MyService()
onCreate()
onStartCommand()
后面的
onStartCommand()
stopService()
第一次:
onDestroy()
后面的:
不做任何事, 不抛出异常
bindService()
第一次
MyService()
onCreate()
onBind()
ServiceConnection对象: onServiceConnected()
后面的(不要反复的做)
ServiceConnection对象: onServiceConnected()
unbindService()
第一次
MyService()
onCreate()
onBind()
ServiceConnection对象: onServiceConnected()
后面的(不要反复的做)
onUnbind()
onDestroy()