1. 原始文件中有一组mp3
2. 读取它们并将它们放入一个数组
3. 获取数组大小
4. 生成一个随机数并将其作为元素传递给媒体播放器
5. 所以玩家跑
6. mp3 剪辑不到 2 秒，所以我等 2 秒，然后播放下一个剪辑，循环播放直到我停止

这是我的想法 这是代码

包 com.hello.musicplayer;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;

import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;


public class AndroidMediaPlayer extends Activity {
    // two
    private MediaPlayer mediaPlayer;
    public TextView songName, duration;
    private double timeElapsed = 0, finalTime = 0;
    private int forwardTime = 2000, backwardTime = 2000;
    private Handler durationHandler = new Handler();
    //private SeekBar seekbar;
    private Field[] fields;
    private String name;
    private int resourceID;
    private List<String> songNames;
    //private List<String> songsDisplay;
    private int nameIntRandom;
    private double timeRemaining;
    private int value;
    private int countinitilaze;
    private int pauseChecker=0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);
        songNames = new ArrayList();
    //  songsDisplay =new ArrayList();

        listRaw();
        initializeViews();

        mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {


            @Override
            public boolean onError(MediaPlayer mp, int what, int extra) {
                System.out.println("mediaPlayer error");
                initializeViews();
                return true;
            }
        });

//      seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
//          @Override
//          public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
//
//              System.out.println("progress" + (progress));
//              System.out.println("progress final - " + finalTime);
//
//
//          }
//
//          @Override
//          public void onStartTrackingTouch(SeekBar seekBar) {
//
//          }
//
//          @Override
//          public void onStopTrackingTouch(SeekBar seekBar) {
//
//          }
//      });
    }

    private void listRaw() {
        System.out.println("listRaw listRaw");
        fields = R.raw.class.getFields();
        for (int count = 0; count < fields.length; count++) {

            System.out.println("listRaw names.... " + fields[count].getName());

            try {
                //  String songsStringNames =fields[count].getName();
                //songsDisplay.add(songsStringNames);

                resourceID = fields[count].getInt(fields[count]);
                System.out.println("listRaw resourceIDresourceID " + resourceID);
                name = String.valueOf(resourceID);

                songNames.add(name);
                System.out.println("listRaw songNames.size();" +songNames.size());
                songNames.size();

            } catch (IllegalAccessException e) {
                e.printStackTrace();
                System.out.println("catch" + e);
            }
        }

    }


    public void initializeViews(){



        Random randomGenerator = new Random();
        value = randomGenerator.nextInt((songNames.size()));
        System.out.println("AndroidMediaPlayer value -" + value);
        songName = (TextView) findViewById(R.id.songName);

        System.out.println("AndroidMediaPlayer songnames array-" + songNames);

        nameIntRandom = Integer.parseInt(songNames.get(value));


        mediaPlayer = MediaPlayer.create(this, nameIntRandom);
        //finalTime = mediaPlayer.getDuration();



        //duration = (TextView) findViewById(R.id.songDuration);
        //seekbar = (SeekBar) findViewById(R.id.seekBar);
        //songName.setText(fields[value].getName());

        //seekbar.setMax((int) finalTime);
        //seekbar.setClickable(false);

        if (countinitilaze >0)
        {

            if (finalTime <2000){
                play();
            }

            else {
                playingBigClip();
                System.out.println("playing a big clip ");
            }
                    }
        countinitilaze++;
    }



    ///////
    public void play(){

if (pauseChecker == 0 ){

        System.out.println("AndroidMediaPlayer play ");
//  timeElapsed = mediaPlayer.getCurrentPosition();
//  seekbar.setProgress((int) timeElapsed);
try {
    mediaPlayer.start();

    if(!mediaPlayer.isPlaying()){
        initializeViews();

    }

}
catch (Exception e){


    initializeViews();


}


        int delay = 1000;// in ms

        Timer timer = new Timer();

        timer.schedule(new TimerTask() {
            public void run() {

            //  mediaPlayer.stop();
                initializeViews();
            }
        }, delay);




}


//      if((timeRemaining/10000) < 1000 ){
//          System.out.println("progress fully compleated ");
//          mediaPlayer.stop();
//          initializeViews();
//
//      }

    }


    ///////////////////////////////////// play mp3 song
    public void play(View view) {
        pauseChecker = 0;
        System.out.println("AndroidMediaPlayer play  onclick");


        if (finalTime <2000){
            play();
        }

        else {
            playingBigClip();
        }
        //durationHandler.postDelayed(updateSeekBarTime, 10);
    }


    public void playingBigClip(){
        System.out.println("play  playingBigClip()");

        //mediaPlayer = MediaPlayer.create(this, nameIntRandom);
        mediaPlayer.start();

        //timeElapsed = mediaPlayer.getCurrentPosition();
        //seekbar.setProgress((int) timeElapsed);



        if((timeRemaining/1000) < 1){
            System.out.println("big clip time remains ");

                initializeViews();
            }

    }

    public void pause(View view) {
pauseChecker = 1;
        System.out.println("AndroidMediaPlayer pause  onclick");
        mediaPlayer.pause();

    }


}

mp3 剪辑工作正常 当它在 25 秒内运行时它停止 有时它会给出这个异常(exception)

java.util.concurrent.TimeoutException: android.media.MediaPlayer.finalize() timed out after 10 seconds
            at android.media.MediaPlayer.native_finalize(Native Method)
            at android.media.MediaPlayer.finalize(MediaPlayer.java:3284)
            at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:194)
            at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:177)
            at java.lang.Thread.run(Thread.java:818)
01-26 08:15:56.410  12699-12720/? E/DBG_POLICYDM﹕ [com.policydm.XDMBroadcastReceiver$2(108/run)] network is unserviceable

我需要继续播放媒体播放器

有什么帮助吗？

XML 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:background="#333333"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >

    <TextView
        android:id="@+id/songName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="songName" />

    <ImageView
        android:id="@+id/mp3Image"
        android:layout_width="match_parent"
        android:layout_height="200dp"
         android:padding="30dp"
        android:src="@drawable/music"
        android:background="#ffffff"
        android:layout_margin="30dp" />

    <TextView
        android:id="@+id/songDuration"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="songDuration" />

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="30dp"
        android:gravity="center_horizontal"
        android:orientation="horizontal" >

        <ImageButton
            android:id="@+id/media_rew"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="14dp"
            android:onClick="rewind"
            android:src="@android:drawable/ic_media_rew" />

        <ImageButton
            android:id="@+id/media_pause"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="14dp"
            android:onClick="pause"
            android:src="@android:drawable/ic_media_pause" />

        <ImageButton
            android:id="@+id/media_play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="14dp"
            android:onClick="play"
            android:src="@android:drawable/ic_media_play" />

        <ImageButton
            android:id="@+id/media_ff"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="14dp"
            android:onClick="forward"
            android:src="@android:drawable/ic_media_ff" />
    </LinearLayout>

</LinearLayout>

最佳答案

当重复创建 MediaPlayer 实例时，您需要在创建下一个播放器之前调用前一个播放器的 release()。引用 MediaPlayer docs :

It is also recommended that once a MediaPlayer object is no longer being used, call release() immediately so that resources used by the internal player engine associated with the MediaPlayer object can be released immediately. Resource may include singleton resources such as hardware acceleration components and failure to call release() may cause subsequent instances of MediaPlayer objects to fallback to software implementations or fail altogether.

虽然您使用单个变量来引用每个新玩家，但旧实例仍会“徘徊”一段时间，并最终由于未明确释放而导致所述异常。

关于Android 媒体播放器异常在 10 秒后超时，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35097419/