android service

service类：

package com.example.service;import android.app.Service;import android.content.Intent;import android.media.MediaPlayer;import android.os.IBinder;import android.util.Log;import android.widget.Toast;/** * service也是运行在主线程，如果处理比较耗时的操作一样要另起新线程， * 没有startservice的情况下stopservice不会报错，没有onbindservice的情况下，onunbindservice会报错。 * bindservice需要serviceconnection对象关联。start不需要。 * 需要在配置文件中声明service。 *  * @author Administrator * */public class servicedemo extends Service {private MediaPlayer mediaPlayer = null;private static final String TAG = "MusicService";//oncreate-onstart-ondestroy//oncreate-onbind-onunbind-ondestroy@Overridepublic IBinder onBind(Intent intent) {// TODO Auto-generated method stubToast.makeText(servicedemo.this, "onBind()", Toast.LENGTH_LONG).show();Log.i(TAG, "onBind()");mediaPlayer.start();return null;}@Overridepublic void onCreate() {// TODO Auto-generated method stubToast.makeText(servicedemo.this, "onCreate()", Toast.LENGTH_LONG).show();Log.i(TAG, "onCreate()");mediaPlayer=MediaPlayer.create(servicedemo.this, R.raw.huranzhijian);//在res文件夹下新建raw文件夹，放入一个mp3文件作为播放文件。}@Overridepublic void onDestroy() {// TODO Auto-generated method stubToast.makeText(servicedemo.this, "onDestroy()", Toast.LENGTH_LONG).show();Log.i(TAG, "onDestroy()");mediaPlayer.stop();}@Overridepublic void onRebind(Intent intent) {// TODO Auto-generated method stubToast.makeText(servicedemo.this, "onRebind()", Toast.LENGTH_LONG).show();Log.i(TAG, "onRebind()");}@Overridepublic void onStart(Intent intent, int startId) {// TODO Auto-generated method stubToast.makeText(servicedemo.this, "onStart()", Toast.LENGTH_LONG).show();Log.i(TAG, "onStart()");mediaPlayer.start();}@Overridepublic boolean onUnbind(Intent intent) {// TODO Auto-generated method stubToast.makeText(servicedemo.this, "onUnbind()", Toast.LENGTH_LONG).show();Log.i(TAG, "onUnbind()");return false;}}

主Activity：

package com.example.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.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {private Button start = null;private Button stop = null;private Button onbind = null;private Button unbind = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);start = (Button) findViewById(R.id.service_start);stop = (Button) findViewById(R.id.service_stop);onbind = (Button) findViewById(R.id.service_onbind);unbind = (Button) findViewById(R.id.service_unbind);start.setOnClickListener(clickListener);stop.setOnClickListener(clickListener);onbind.setOnClickListener(clickListener);unbind.setOnClickListener(clickListener);}/** * ServiceConnection */final ServiceConnection serviceConnection = new ServiceConnection() {@Overridepublic void onServiceDisconnected(ComponentName name) {// TODO Auto-generated method stub// 解除链接时调用}@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {// TODO Auto-generated method stub// 绑定链接时调用}};android.view.View.OnClickListener clickListener = new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent(MainActivity.this,com.example.service.servicedemo.class);switch (v.getId()) {case R.id.service_start:startService(intent);break;case R.id.service_stop:stopService(intent);break;case R.id.service_onbind:bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);break;case R.id.service_unbind:unbindService(serviceConnection);}}};}

布局文件：

<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"    tools:context=".MainActivity" >    <Button        android:id="@+id/service_start"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:layout_marginLeft="22dp"        android:layout_marginTop="35dp"        android:text="start" />    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_toRightOf="@+id/service_start"        android:text="service使用"        android:textAppearance="?android:attr/textAppearanceMedium" />    <Button        android:id="@+id/service_stop"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBaseline="@+id/service_start"        android:layout_alignBottom="@+id/service_start"        android:layout_alignLeft="@+id/textView1"        android:layout_marginLeft="20dp"        android:text="stop" />    <Button        android:id="@+id/service_onbind"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBaseline="@+id/service_stop"        android:layout_alignBottom="@+id/service_stop"        android:layout_toRightOf="@+id/textView1"        android:text="onbind" />    <Button        android:id="@+id/service_unbind"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBaseline="@+id/service_onbind"        android:layout_alignBottom="@+id/service_onbind"        android:layout_alignParentRight="true"        android:text="unbind" /></RelativeLayout>

配置文件：

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

更多相关文章

随机推荐