android Bound Service使用:使用Message类绑定服务

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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/current_time"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="当前时间"        android:textColor="@android:color/white"        android:textSize="25dp"/></RelativeLayout>

CurrentTimeService1.java

package com.example.demoboundservice;import android.app.Service;import android.content.Intent;import android.os.Handler;import android.os.IBinder;import android.os.Message;import android.os.Messenger;import android.text.format.Time;import android.widget.Toast;public class CurrentTimeService1 extends Service{public static final int CURRENT_TIME=0;private class IncomingHandler extends Handler{public void handleMessage(Message msg){if(msg.what==CURRENT_TIME){Time time = new Time();time.setToNow();String currentTime = time.format("%Y-%m-%d %H:%M:%S");Toast.makeText(CurrentTimeService1.this,currentTime,Toast.LENGTH_LONG).show();}else{super.handleMessage(msg);}}}public IBinder onBind(Intent intent){Messenger messenger = new Messenger(new IncomingHandler());return messenger.getBinder();}}

CurrentTimeActivity.java：

package com.example.demoboundservice;import android.app.Activity;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.os.Message;import android.os.Messenger;import android.os.RemoteException;import android.view.View;import android.widget.Button;public class CurrentTimeActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}Messenger messenger;boolean bound;protected void onStart(){super.onStart();Button button = (Button)findViewById(R.id.current_time);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {Intent intent = new Intent(CurrentTimeActivity.this,CurrentTimeService.class);bindService(intent,connection,BIND_AUTO_CREATE);if(bound){Message message = Message.obtain(null,CurrentTimeService1.CURRENT_TIME,0,0);try{messenger.send(message);}catch(RemoteException e){e.printStackTrace();}}}});}protected void onStop(){super.onStop();if(bound){bound  = false;unbindService(connection);}}private ServiceConnection connection = new ServiceConnection(){public void onServiceDisconnected(ComponentName name){messenger = null;bound = false;}public void onServiceConnected(ComponentName name,IBinder service){messenger = new Messenger(service);bound = true;}};}

AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.demoboundservice"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="19" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.demoboundservice.CurrentTimeActivity"            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:name="com.example.demoboundservice.CurrentTimeService1"/>    </application></manifest>

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