在Android应用中使用MediaPlayer的正确方法 [英] Correct method to use MediaPlayer in android app

问题描述

对不起，我的英语，但是我来自巴西，我使用了谷歌翻译器.

sorry my english, but I'm from Brazil and I used the google translator.

好吧，我正在尝试在此应用程序中尝试使流式传输成为在线广播，在2.2版中可以正常工作，但4.0版不起作用.没有错误发生，根本行不通.下面是我的代码.

Well, I'm struggling in this application where I am trying to make a streaming an online radio, works fine in version 2.2, but version 4.0 does not work. No error occurs, simply does not work. Below is my code.

感谢您的帮助.

package com.radiomiriam;
import java.io.IOException;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;

public class Main extends Activity {
public String url = "http://69.64.48.96:9880";
public MediaPlayer player = new MediaPlayer();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    play();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

public void stop(){
    Toast.makeText(getApplicationContext(), "Finalizando...", Toast.LENGTH_SHORT).show();
    if(player.isPlaying()){
        player.stop();
    }
}

public void play(){
    if(player.isPlaying()){
        Toast.makeText(getApplicationContext(), "Já está em execução!", Toast.LENGTH_SHORT).show();
    } else {
        Toast.makeText(getApplicationContext(), "Preparando...", Toast.LENGTH_SHORT).show();
        player.setAudioStreamType(AudioManager.STREAM_MUSIC);
        player.setAudioStreamType(AudioManager.STREAM_NOTIFICATION);
        try {
            player.setDataSource(url);
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
            player.prepare();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        player.start();
    }
}

public void onClick(View v) {
    final int id = v.getId();
    switch (id) {
    case R.id.btnPlay:
        play();
        break;
    case R.id.btnStop:
        stop();
        break;
    }
}
}

您好，请原谅，但我仍未找到解决问题的方法，也不知道如何解决，我再次寻求您的帮助来解决此问题.

Hello, excuse my insistence but I still have not found the solution to my problem and do not know how to solve, I have once again asking for your help to solve this problem.

该应用程序在2.x和3.x版本中运行，但在4.x版本中未运行.以下是下载该项目的链接，您可以查看该链接并为我提供帮助.

The application runs in versions 2.x and 3.x but not in version 4.x. Below is a link to download the project, to which you can take a look and help me.

http://nsi.inf.br/RadioMiriam.rar (已删除) >

http://nsi.inf.br/RadioMiriam.rar (removed)

推荐答案

我下载了您的项目，但实际上返回了错误代码: E/MediaPlayer(1976):错误(-38，0)

i downloaded your project and it actually returns error Code: E/MediaPlayer( 1976): error (-38, 0)

这是由于在准备之前启动Mediaplayer引起的.

It is caused by starting mediaplayer before it is prepared.

我进行了很少的更改，并且开始工作.您应该:

I have made few changes and it started to work. You should :

1. 在MediaPlayer上设置onPrepared侦听器(即在onCreate中)

1. Set onPrepared listener on MediaPlayer (i.e. in onCreate)

player.setOnPreparedListener(new OnPreparedListener() {
    @Override
    public void onPrepared(MediaPlayer mp) {
        mp.start();
    }
});

从play()方法中删除player.start()

Remove player.start() from your play() method

以这种方式设置数据源(在您的play()方法中)

Set datasource in this way (in your play() method)

player.setDataSource(this, Uri.parse("http://69.64.48.96:9880/"));

它适用于Android 4.0.3的HTC Sensation

It works on my HTC Sensation with Android 4.0.3

如果您需要任何帮助，请告诉我.

If you need any assistance please let me know.

我忘记了，我也删除了

player.setAudioStreamType(AudioManager.STREAM_NOTIFICATION);

这是多余的

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