从资源/原材料播放声音

问题描述

我米做一个应用程序，这是应该打几个声音的媒体播放器。这是code我使用：

I m making an app which is supposed to play a few sounds with the mediaPlayer.This is the code i use :

String[] name = {"sonar_slow","sonar_medium","sonar_fast"};
    String link = "/res/raw/" + name[state-1] + ".mp3";

    try {
        player.setDataSource(link);
        player.prepare();
        player.start();
    } catch(Exception e) {
        e.printStackTrace();
    }

我也试过这样的：

I also tried this :

        if(state==1){
            player.create(this, R.raw.sonar_slow);
        }else if(state==2){
            player.create(this, R.raw.sonar_medium);
        }else if(state==3){
            player.create(this, R.raw.sonar_fast);
        }
        player.start();

但没有任何上述工作正常。我的应用程序没有崩溃，但声音是不是在玩。任何想法？

But none of the above is working. My app is not crashing but the sound is not playing.Any ideas ?

推荐答案

有两个问题。

您不能引用的资源在你的项目/ RES / raw目录以这种方式。在你的项目目录中的文件/res/raw/sonar_slow.mp3不是存储在你的apk/res/raw/sonar_slow.mp3。代替如下：

You cannot reference resources inside your projects /res/raw directory in this fashion. The file "/res/raw/sonar_slow.mp3" in your project directory is not stored in "/res/raw/sonar_slow.mp3" in your apk. Instead of the following:

MediaPlayer mp = MediaPlayer.create(this);
mp.setSource("sonar_slow");

您需要使用

MediaPlayer mp = MediaPlayer.create(this, R.raw.sonar_slow);

问题2

下面是错误的：它调用不会修改播放机的静态方法

player.create(this, R.raw.sonar_slow);

您应该改为调用

player = MediaPlayer.create(this, R.raw.sonar_slow);

完整的解决方案

下面是封装MediaPlayer的一个可重用的AudioPlayer类。这是稍微：大书呆子牧场指南Android的程序进行修改。它使一定要记得清理资源

Full solution

Below is a reusable AudioPlayer class that encapsulates MediaPlayer. This is slightly modified from "Android Programming: The Big Nerd Ranch Guide". It makes sure to remember to clean up resources

package com.example.hellomoon;

import android.content.Context;
import android.media.MediaPlayer;

public class AudioPlayer {

    private MediaPlayer mMediaPlayer;

    public void stop() {
        if (mMediaPlayer != null) {
            mMediaPlayer.release();
            mMediaPlayer = null;
        }
    }

    public void play(Context c, int rid) {
        stop();

        mMediaPlayer = MediaPlayer.create(c, rid);
        mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mediaPlayer) {
                stop();
            }
        });

        mMediaPlayer.start();
    }

}

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