Android的音乐播放器服务后回家/后退按钮不打是pressed [英] Android Music Player Service not playing after home/back button is pressed
问题描述
想写音乐播放器code在android.I写了一个service.Here在MediaPlayer code是code:
Am trying to write music player code in android.I wrote the MediaPlayer code in a service.Here is the code:
package com.example.audioservice;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
public class MyService extends Service {
static MediaPlayer mp;
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
System.out.println("in MyService onCreate()");
mp=MediaPlayer.create(getApplicationContext(),R.raw.subanallah);
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
System.out.println("in onService onBind()");
return null;
}
@Override
public int onStartCommand(Intent intent,int flags, int startId) {
super.onStart(intent, startId);
Log.d("log", "In onStart.");
System.out.println("in MyService onStartCommand()");
mp.start();
return Service.START_STICKY;
}
}
和从活动称为服务
Intent s=new Intent(this,MyService.class);
startService(s);
补充清单文件服务
Added the Service in manifest file
<service android:name="com.example.audioservice.MyService"></service>
但是,当家庭/后退按钮是pressed应用程序正在重新启动again.My的要求是,当家庭/后退按钮是pressed应用程序应该continously发挥music.Please帮我。
But when home/backbutton is pressed app is restarting again.My requirement is when home/back button is pressed the app should continously play the music.Please help me.
推荐答案
编辑全code
一步重复此步骤:
箱子activity_main.xml中粘贴此
crate activity_main.xml and paste this
<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/playId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/stopId"
android:layout_marginRight="53dp"
android:text="Play" />
<Button
android:id="@+id/stopId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="48dp"
android:layout_marginTop="50dp"
android:text="Stop" />
之后,创建的MyService类,并粘贴此
After that create MyService class and paste this
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
public class MyService extends Service {
MediaPlayer mp;
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public void onCreate()
{
super.onCreate();
mp = MediaPlayer.create(getApplicationContext(), R.raw.ram3);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
mp.start();
mp.setLooping(true);
return 0;
}
@Override
public void onDestroy()
{
mp.release();
super.onDestroy();
}
}
之后,创建MainActivity1类,并粘贴此
After that create MainActivity1 class and paste this
import android.os.Bundle;
进口android.app.Activity;
进口android.content.Intent;
进口android.view.View;
进口android.widget.Button;
import android.app.Activity; import android.content.Intent; import android.view.View; import android.widget.Button;
public class MainActivity1 extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button play, stop;
play = (Button) findViewById(R.id.playId);
stop = (Button) findViewById(R.id.stopId);
play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent service = new Intent(MainActivity1.this, MyService.class);
startService(service);
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent name = new Intent(MainActivity1.this, MyService.class);
stopService(name);
}
});
}
}
最后一步是粘贴以下code的AndroidManifest.xml
Last step is paste the following code AndroidManifest.XML
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity1"
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=".MyService"
android:enabled="true" >
</service>
</application>
这是必须的工作,没有这方面的疑问。
It's must work, no doubt about this.
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