--------------------------------------------AndroidManifest.xml---------------------------------
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.kawa.ch29"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:enabled="true" android:name=".service.MyService"></service>
</application>
</manifest>
--------------------------------------------activity_main.xml------------------------------------
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btn_start"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="start server" />
<Button
android:id="@+id/btn_end"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="end server" />
<Button
android:id="@+id/btn_bind"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="bind server" />
<Button
android:id="@+id/btn_unbind"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="unbind server" />
</LinearLayout>
--------------------------------------------MainActivity.java------------------------------------
package com.kawa.ch29;
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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import com.kawa.ch29.service.MyService;
import com.kawa.ch29.util.LogOut;
/**
*
* 项目名称:com.kawa.ch29
*
* 类名称:MainActivity
*
* 类描述:
*
* 创建人:fy
*
* 创建时间:2012-10-3 下午8:46:54
*
* Copyright (c) 方勇-版权所有
*/
public class MainActivity extends Activity {
private Button btn_start;
private Button btn_end;
private Button btn_bind;
private Button btn_unbind;
private Intent serviceIntent;
private MyService myService;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViews();
setListeners();
serviceIntent = new Intent(this, MyService.class);
myService = new MyService();
}
private void findViews() {
btn_start = (Button) findViewById(R.id.btn_start);
btn_end = (Button) findViewById(R.id.btn_end);
btn_bind = (Button) findViewById(R.id.btn_bind);
btn_unbind = (Button) findViewById(R.id.btn_unbind);
}
private void setListeners() {
btn_start.setOnClickListener(onClickListener);
btn_end.setOnClickListener(onClickListener);
btn_bind.setOnClickListener(onClickListener);
btn_unbind.setOnClickListener(onClickListener);
}
private ServiceConnection serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName paramComponentName,
IBinder paramIBinder) {
// 获得MyService对象
myService = ((MyService.MyBinder) paramIBinder).getService();
Toast
.makeText(MainActivity.this, "Service Connected.", Toast.LENGTH_LONG)
.show();
LogOut.out(this, "onServiceConnected()");
}
/*
* 在连接正常关闭的情况下是不会被调用的,
* 该方法只在Service 被破坏了或者被杀死的时候调用.
* 例如, 系统资源不足, 要关闭一些Services, 刚好连接绑定的 Service 是被关闭者之一,
* 这个时候onServiceDisconnected() 就会被调用
*/
@Override
public void onServiceDisconnected(ComponentName paramComponentName) {
myService = null;
Toast.makeText(MainActivity.this, "Service Failed.", Toast.LENGTH_LONG)
.show();
LogOut.out(this, "onServiceDisconnected()");
}
};
private OnClickListener onClickListener = new OnClickListener() {
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_start:
startService(serviceIntent);// 开启服务
break;
case R.id.btn_end:
stopService(serviceIntent);// 停止服务
break;
case R.id.btn_bind:
// 绑定服务
bindService(serviceIntent, serviceConnection, Context.BIND_AUTO_CREATE);
break;
case R.id.btn_unbind:
unbindService(serviceConnection);// 解除绑定服务
break;
}
}
};
}
--------------------------------------------util目录 LogOut .java--------------------------------
package com.kawa.ch29.util;
import android.util.Log;
/**
*
* 项目名称:com.kawa.ch29
*
* 类名称:LogOut
*
* 类描述: 用于打印日志
*
* 创建人:fy
*
* 创建时间:2012-9-5 下午10:05:56
*
* Copyright (c) 方勇-版权所有
*/
public class LogOut {
public static final String TAG = "kawa";
private static final boolean DEBUG = true;
public static void out(Object obj, String info) {
if (DEBUG) {
String tag = TAG;
if (info.startsWith("length")) {
tag = TAG + "_TMP";
}
if (obj instanceof String) {
Log.d(tag, ((String) obj) + "->" + info);
} else {
Log.d(tag, obj.getClass().toString().substring(6) + "->" + info);
}
}
}
public static void out(Object obj, String tag, String info) {
if (DEBUG) {
if (obj instanceof String) {
Log.d(TAG + "_" + tag, ((String) obj) + "->" + info);
} else {
Log.d(TAG + "_" + tag, obj.getClass().toString().substring(6)
+ "->" + info);
}
}
}
}
--------------------------------------------service目录 MyService.java-------------------------
package com.kawa.ch29.service;
import com.kawa.ch29.util.LogOut;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
public class MyService extends Service {
private MyBinder myBinder = new MyBinder();
public MyService() {
}
/* 成功绑定Activity和Service后调用该方法 */
@Override
public IBinder onBind(Intent paramIntent) {
LogOut.out(this, "onBind()");
return myBinder;
}
/* 解除绑定Activity和Service时调用该方法 */
@Override
public boolean onUnbind(Intent intent) {
LogOut.out(this, "onUnbind()");
return super.onUnbind(intent);
}
/* 重新绑定Activity和Service时调用该方法 */
@Override
public void onRebind(Intent intent) {
super.onRebind(intent);
LogOut.out(this, "onRebind()");
}
/* 当服务第1次创建时调用该方法,只执行一次 */
@Override
public void onCreate() {
super.onCreate();
LogOut.out(this, "onCreate()");
}
/* 当开始服务时调用该方法,执行多次 */
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
LogOut.out(this, "onStart()");
}
/* 当服务销毁时调用该方法,只执行一次 */
@Override
public void onDestroy() {
super.onDestroy();
LogOut.out(this, "onDestroy()");
}
/* MyService的对象实例的 */
public class MyBinder extends Binder {
public MyService getService() {
return MyService.this;
}
};
}
--------------------------------------------效果---------------------------------------------------
按如下的单击按钮顺序的测试
【Start Service】→【End Service】→【Start Service】→【Start Service】→【Start Service】→【End Service】
日志文件如下
按如下的单击按钮顺序的测试,解除绑定时,service也销毁了。
【Bind Service】→【UnBind Service】→【Bind Service】
按如下的单击按钮顺序的测试,解除绑定时,service没有销毁了。
在这种情况下,虽然服务仍然会成功绑定到Activity上,但在Activity关闭后,服务虽然会被解除绑定,但并不会被销毁,也就是说,MyService类的onDestroy方法不会被调用
【Bind Service】→【Start Service】→【UnBind Service】→【Bind Service】