MediaPlayer的抛出IllegalStateException异常 [英] MediaPlayer throws illegalstateexception

问题描述

EDIT3：
Ahaaa！ MP崩溃时SP给出的样品14没有准备好......

编辑2：
我也有我的活动的Soundpool扮演什么短的声音效果，显然，它在某种程度上杀死的MediaPlayer。
在MediaPlayer负载，如，扮演一秒钟，然后加载SP时死亡。
如果我在以后的时间加载的MediaPlayer，当已经被加载SP，MP会开始播放罚款，但如果我在SP打了几个声音FX会死...

edit 2: I also have a SoundPool in my activity what plays short sound effects and, obviously, it somehow kills the MediaPlayer. Like the MediaPlayer loads, plays about a second and then dies when SP is loaded. If I load MediaPlayer at a later time, when SP is already loaded, MP will start playing fine, but will die if I play a few sound FX in SP...

老：
我想播放音乐的声音文件，大约2分钟之久...

old: I'm trying to play a music sound file, about 2 minutes long...

    try {
        MediaPlayer mp = MediaPlayer.create(main.this, R.raw.naturesounds );
        mp.prepare();
        mp.start();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

但它抛出

06-29 16:50:52.359: E/MediaPlayer(3772): prepareAsync called in state 8
06-29 16:50:52.359: W/System.err(3772): java.lang.IllegalStateException
06-29 16:50:52.359: W/System.err(3772):     at android.media.MediaPlayer.prepare(Native Method)
06-29 16:50:52.359: W/System.err(3772):     at engineDemo.com.main.fillWorld(main.java:132)
06-29 16:50:52.359: W/System.err(3772):     at engineDemo.com.main.onCreate(main.java:83)
06-29 16:50:52.359: W/System.err(3772):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-29 16:50:52.359: W/System.err(3772):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
06-29 16:50:52.359: W/System.err(3772):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
06-29 16:50:52.359: W/System.err(3772):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
06-29 16:50:52.359: W/System.err(3772):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
06-29 16:50:52.359: W/System.err(3772):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-29 16:50:52.359: W/System.err(3772):     at android.os.Looper.loop(Looper.java:130)
06-29 16:50:52.359: W/System.err(3772):     at android.app.ActivityThread.main(ActivityThread.java:3683)
06-29 16:50:52.359: W/System.err(3772):     at java.lang.reflect.Method.invokeNative(Native Method)
06-29 16:50:52.359: W/System.err(3772):     at java.lang.reflect.Method.invoke(Method.java:507)
06-29 16:50:52.359: W/System.err(3772):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
06-29 16:50:52.363: W/System.err(3772):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
06-29 16:50:52.363: W/System.err(3772):     at dalvik.system.NativeStart.main(Native Method)

任何想法可能是错误的或者什么播放背景音乐的最佳方式？

Any ideas what might be wrong or what's the best way to play background music?

谢谢！

编辑：

编辑这样

    final MediaPlayer mediaPlayer = MediaPlayer.create(this, R.raw.naturesounds);
    mediaPlayer.setOnPreparedListener(new OnPreparedListener(){

        public void onPrepared(MediaPlayer arg0) {
            Log.e("ready!","ready!");
            mediaPlayer.start();

        }} );

它确实表明了日志，但仍没有起到......

it does show the Log, but still nothing plays...

推荐答案

例如，从href=\"http://developer.android.com/guide/topics/media/mediaplayer.html\">开发上的MediaPlayer文档的：

Example from the develop docs on MediaPlayer:

mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
    @Override
    public void onPrepared(MediaPlayer arg0) {
        mp.start();

    }
});
//Below this line is the example from docs.
/*----------------------------------------------------*/
MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.sound_file_1);
//mediaPlayer.start(); // no need to call prepare(); create() does that for you

您的MediaPlayer已经prepared（）你不需要调用创造了。

Your MediaPlayer is already Prepared() you don't need to call that after create.

这篇关于MediaPlayer的抛出IllegalStateException异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！