android4.2中的后台服务Service及配置

1.创建界面布局activity_main.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Button android:id="@+id/button_start"        android:layout_width="fill_parent"         android:layout_height="wrap_content"        android:text="启动Service"/>    <Button android:id="@+id/button_stop"        android:layout_width="fill_parent"         android:layout_height="wrap_content"        android:text="停止Service"        android:layout_below="@id/button_start"/>   <Button android:id="@+id/button_bind"        android:layout_width="fill_parent"         android:layout_height="wrap_content"        android:text="绑定Service"        android:layout_below="@id/button_stop"/>   <Button android:id="@+id/button_unbind"        android:layout_width="fill_parent"         android:layout_height="wrap_content"        android:text="解除绑定"        android:layout_below="@id/button_bind"/></RelativeLayout>

2.创建Service服务MyService

public class MyService extends Service {@Overridepublic IBinder onBind(Intent arg0) {Log.i("MyService","onBind....ing......");Toast.makeText(MyService.this, "onBind....ing......", Toast.LENGTH_LONG).show();return null;}@Overridepublic void onCreate() {super.onCreate();Log.i("MyService","onCreate....ing......");Toast.makeText(MyService.this, "onCreate....ing......", Toast.LENGTH_LONG).show();}@Overridepublic void onDestroy() {super.onDestroy();Log.i("MyService","onDestroy....ing......");Toast.makeText(MyService.this, "onDestroy....ing......", Toast.LENGTH_LONG).show();}@Overridepublic void onStart(Intent intent, int startId) {Log.i("MyService","onStart....ing......");Toast.makeText(MyService.this, "onStart....ing......", Toast.LENGTH_LONG).show();}}

3.创建Activity

public class MainActivity extends Activity {protected ServiceConnection conn;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button startButton=(Button)findViewById(R.id.button_start);Button stopButton=(Button)findViewById(R.id.button_stop);Button bindButton=(Button)findViewById(R.id.button_bind);Button unbindButton=(Button)findViewById(R.id.button_unbind);//连接对象conn=new ServiceConnection(){@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {Log.i("MyService", "连接成功！");Toast.makeText(MainActivity.this, "连接成功！", Toast.LENGTH_LONG).show();}@Overridepublic void onServiceDisconnected(ComponentName name) {Log.i("MyService", "断开连接！");Toast.makeText(MainActivity.this, "断开连接！", Toast.LENGTH_LONG).show();}};startButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {Intent intent=new Intent();//intent.setClass(MainActivity.this, MyService.class);intent.setAction("com.dh.service.MY_SERVICE");startService(intent);}});stopButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent=new Intent();intent.setAction("com.dh.service.MY_SERVICE");stopService(intent);}});bindButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent=new Intent();intent.setAction("com.dh.service.MY_SERVICE");bindService(intent, conn, Service.BIND_AUTO_CREATE);}});unbindButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent=new Intent();intent.setAction("com.dh.service.MY_SERVICE");unbindService(conn);}});}}

4.配置AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.dh.service"    android:versionCode="1"    android:versionName="1.0" ><permission android:protectionLevel="normal" android:name="com.dh.service.MY_SERVICE"></permission>    <uses-sdk        android:minSdkVersion="7"        android:targetSdkVersion="17" />       <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.dh.service.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>                <service android:permission="com.dh.service.MY_SERVICE"            android:name="com.dh.service.MyService"            android:enabled="true" >            <intent-filter >                <action  android:name="com.dh.service.MY_SERVICE"/>            </intent-filter>        </service>    </application></manifest>