Android中的Service服务绑定

package com.example.yangjian.connectservice;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends ActionBarActivity implements View.OnClickListener, ServiceConnection {

private EditText etData;
private MyService.Binder binder = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

etData = (EditText) findViewById(R.id.etData);

findViewById(R.id.btnStartService).setOnClickListener(this);
findViewById(R.id.btnStopService).setOnClickListener(this);

findViewById(R.id.btnBindService).setOnClickListener(this);
findViewById(R.id.btnUnbindService).setOnClickListener(this);

findViewById(R.id.btnSyncData).setOnClickListener(this);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnStartService:
Intent i = new Intent(this, MyService.class);
i.putExtra("data", etData.getText().toString());
startService(i);
break;

case R.id.btnStopService:
stopService(new Intent(this, MyService.class));
break;

case R.id.btnBindService:
bindService(new Intent(this, MyService.class), this, Context.BIND_AUTO_CREATE);
break;

case R.id.btnUnbindService:
unbindService(this);
break;

case R.id.btnSyncData:
if (binder != null) {
binder.setData(etData.getText().toString());
}
break;
}
}

@Override
public void onServiceConnected(ComponentName name, IBinder service) {
binder = (MyService.Binder)service;
}

@Override
public void onServiceDisconnected(ComponentName name) {

}
}

第二，MyService代码程序如下：

package com.example.yangjian.connectservice;import android.app.Service;import android.content.Intent;import android.os.IBinder;public class MyService extends Service {private boolean running = false;private String data = "information";public MyService() {}@Overridepublic IBinder onBind(Intent intent) {return new Binder();}public class Binder extends android.os.Binder{public void setData(String data) {MyService.this.data = data;}}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {data = intent.getStringExtra("data");return super.onStartCommand(intent, flags, startId);}@Overridepublic void onCreate() {super.onCreate();running = true;new Thread(){@Overridepublic void run() {super.run();while (running) {System.out.println(data);try {sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}}.start();}@Overridepublic void onDestroy() {super.onDestroy();running = false;}}

<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:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"android:paddingBottom="@dimen/activity_vertical_margin"android:orientation="vertical"tools:context=".MainActivity"><EditTextandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="默认信息"android:id="@+id/etData"/><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="启动服务"android:id="@+id/btnStartService"/><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="停止服务"android:id="@+id/btnStopService"/><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="绑定服务"android:id="@+id/btnBindService" /><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="解除绑定服务"android:id="@+id/btnUnbindService" /><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="同步数据"android:id="@+id/btnSyncData" /></LinearLayout>

最后，配置Mainfest文件：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.example.yangjian.connectservice" ><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><activityandroid: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><serviceandroid:name=".MyService"android:enabled="true"android:exported="true" ></service></application></manifest>