如何在Android中播放音频文件?

我有代码来播放.ogg音频文件,我从互联网上下载。 我没有错误,所以我可以运行它,但然后应用程序崩溃:

package play.my.sound;

import android.app.Activity;
import android.media.AudioManager;
import android.media.SoundPool;
import android.media.SoundPool.OnLoadCompleteListener;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;

public class PlaySound2Activity extends Activity {
private SoundPool soundPool;
private int soundID;
boolean loaded = false;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    View view = findViewById(R.id.textView1);
    view.setOnClickListener((OnClickListener) this);
    // Set the hardware buttons to control the music
    this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
    // Load the sound
    soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 0);
    soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
        public void onLoadComplete(SoundPool soundPool, int sampleId,
                int status) {
            loaded = true;
        }
    });
    soundID = soundPool.load("sound1.ogg", 1);

}

public boolean onTouch(View v, MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        // Getting the user sound settings
        AudioManager audioManager = (AudioManager) getSystemService    (AUDIO_SERVICE);
        float actualVolume = (float) audioManager
                .getStreamVolume(AudioManager.STREAM_MUSIC);
        float maxVolume = (float) audioManager
                .getStreamMaxVolume(AudioManager.STREAM_MUSIC);
        float volume = actualVolume / maxVolume;
        // Is the sound loaded already?
        if (loaded) {
            soundPool.play(soundID, volume, volume, 1, 0, 1f);
            Log.e("Test", "Played sound");
        }
    }
    return false;
}
}

我认为我有两个问题:

  • 我把它放在main.xml文件中:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView android:text="Click on the screen to start playing"
        android:id="@+id/textView1" android:layout_width="fill_parent"
        android:layout_height="fill_parent"></TextView>
    </LinearLayout>
    
    我不知道这是否正确。

  • 我将文件sound1.ogg放在workspace->SoundPlay2文件夹中,因为在res文件夹中我遇到了问题,而且我试图将它放在存在的两个res文件夹中。

  • 这是从我的控制台:

    [2012-01-04 19:38:16 - PlaySound2] Failed to install PlaySound2.apk on device 'emulator-5554': timeout
    [2012-01-04 19:38:16 - PlaySound2] Launch canceled!
    [2012-01-04 19:47:33 - PlaySound2] Error in an XML file: aborting build.
    [2012-01-04 19:52:34 - PlaySound2] reslayoutmain.xml:0: error: Resource entry main is already defined.
    [2012-01-04 19:52:34 - PlaySound2] reslayoutmain.out.xml:0: Originally defined here.
    [2012-01-04 19:52:34 - PlaySound2] C:UsersNataliaworkspacePlaySound2reslayoutmain.out.xml:1: error: Error parsing XML: no element found
    

    我从“Android声音 - 教程”中找到了这个例子。 我想播放一个音频文件,更具体地说,一个.wav文件。

    我不知道我在哪里可以找到关于MediaPlayer类中允许的文件的一些信息及其特性(durantion,采样率...)您能否告诉我在哪里可以找到?


    在res文件夹中创建原始文件夹并将文件添加到它。 然后使用该文件播放

    soundID = soundPool.load(R.raw.sound1, 1);
    

    还可以参阅这篇文章,了解您的main.xml问题。


    我从来没有见过Class SoundPool,但是我会推荐使用MediaPlayer Class:

    mMediaPlayer = new MediaPlayer(this, R.raw.yourfile);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.prepare();
    mMediaPlayer.start();
    

    确保将文件放入文件夹PROJECT / res / raw /(或者如果文件不存在则创建它)

    你的main.xml也有问题。 你可以请张贴吗?


    玩某种蜂鸣器的例子。 在原始文件夹下的res文件夹中,我有一个buzzer.wav

    玩这个蜂鸣器的方法:

         /**
     * Method to play an alarm sound to signal half time or full time.
     */
    private void playAlarm() {
        MediaPlayer mp = MediaPlayer.create(this,
                R.raw.buzzer);
        mp.start();
        mp.setOnCompletionListener(new OnCompletionListener() {
    
            @Override
            public void onCompletion(MediaPlayer mp) {
                mp.release();
            }
    
        });
    
    }
    
    链接地址: http://www.djcxy.com/p/93171.html

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