在 android 应用程序中播放背景声音

Play Background Sound in android applications

提问by SuRaj Creator

I want to play background sound in my app which I made. Help me how can I do this?...Here is the entire code.

我想在我制作的应用程序中播放背景声音。帮助我我该怎么做？...这是完整的代码。

public class Numbers extends Activity {
    public static MediaPlayer mp = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_numbers);
        ViewPager viewPager = (ViewPager)findViewById(R.id.view_pager);
        ImagePagerAdapter adapter = new ImagePagerAdapter();
        viewPager.setAdapter(adapter);
    }

    private class ImagePagerAdapter extends PagerAdapter {
        private int[] mImages = new int[]{R.drawable.no1,R.drawable.no2,R.drawable.no3,R.drawable.no4,R.drawable.no5,R.drawable.no6,R.drawable.no7,R.drawable.no8,R.drawable.no9};

        @Override
        public int getCount() {
            return mImages.length;
        }
        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view == ((ImageView) object);
        }
        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            Context context = Numbers.this;
            ImageView imageView = new ImageView(context);
            int padding =context.getResources().  
            getDimensionPixelSize(R.dimen.activity_vertical_margin);
            imageView.setPadding(padding, padding, padding, padding);
            imageView.setScaleType(ImageView.ScaleType.CENTER);
            imageView.setImageResource(mImages[position]);
            ((ViewPager) container).addView(imageView, 0);

            @Override
            public void destroyItem(ViewGroup container, int position, Object object) {
                ((ViewPager) container).removeView((ImageView) object);
            }
        }
    }//end of sub-class ImagePagerAdapter
}//End of Numbers class

Just tell me what I need to add in this code to play background music which will be in loop mode till the app runs.

只需告诉我需要在此代码中添加什么来播放背景音乐，该背景音乐将处于循环模式，直到应用程序运行。

回答by Ravi

Better to put your media code in service. It is best way to play media in background.

最好将您的媒体代码投入使用。这是在后台播放媒体的最佳方式。

public class serv extends Service{

    MediaPlayer mp;
    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
    public void onCreate()
    {   
        mp = MediaPlayer.create(this, R.raw.b);
        mp.setLooping(false);
    }
    public void onDestroy()
    {       
        mp.stop();
    }
    public void onStart(Intent intent,int startid){

        Log.d(tag, "On start");
        mp.start();
    }
}

where raw is folder created in resources. and R.raw.bis an mp3 file.

其中 raw 是在资源中创建的文件夹。并且R.raw.b是一个mp3文件。

回答by Nabi K.A.Z.

This is tested in android studio 2.2.3

这是在android studio 2.2.3中测试的

1) first copy and paste your music.mp3into app.res.raw.

1）首先复制并粘贴music.mp3到app.res.raw.

2) set service into AndroidManifest.xmlbe like this:

2）将服务设置成AndroidManifest.xml这样：

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme">
    :
    :
    <service android:name=".SoundService"  android:enabled="true"></service>
</application>

3) Add SoundService.javafile with contain this code:

3）添加SoundService.java包含此代码的文件：

package com.jahanweb.ring;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;

public class SoundService extends Service {
    MediaPlayer player;

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    public void onCreate() {
        player = MediaPlayer.create(this, R.raw.music); //select music file
        player.setLooping(true); //set looping
    }

    public int onStartCommand(Intent intent, int flags, int startId) {
        player.start();
        return Service.START_NOT_STICKY;
    }

    public void onDestroy() {
        player.stop();
        player.release();
        stopSelf();
        super.onDestroy();
    }

}

4) use it in the activity be like this:

4）在活动中使用它是这样的：

package com.jahanweb.ring;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        //start service and play music
        startService(new Intent(MainActivity.this, SoundService.class));

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    protected void onDestroy() {
        //stop service and stop music
        stopService(new Intent(MainActivity.this, SoundService.class));
        super.onDestroy();
    }
}

回答by priyanka morisetti

MediaPlayer  player = MediaPlayer.create(this,  R.raw.music);
player.setLooping(true); // Set looping
player.setVolume(100,100);

public int onStartCommand(Intent intent, int flags, int startId) {
    player.start();
    return 1;
}

@Override
public void onDestroy() {
    player.stop();
    player.release();
}

public void onStart(Intent intent, int startId) 
{
    // TODO
}

回答by Riskhan

Try below link... hope this will work

试试下面的链接...希望这会奏效

How to play audio in android using android service

如何使用android服务在android中播放音频