MP3 声音持续时间 0 秒未在安卓中播放，日志空点异常错误

Question

这里click21是一个持续时间为 0 秒的mp3声音，我从 click21.aiff 转换而来。但是当我运行它时，我收到类型 nullpointexception 的错误错误。
你能告诉我问题是什么吗？

 MediaPlayer mp;
 mp =MediaPlayer.create(this, R.drawable.click21);
    mp.start();

错误日志

03-31 11:39:56.371: E/AndroidRuntime(811): FATAL EXCEPTION: main
03-31 11:39:56.371: E/AndroidRuntime(811): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.simba.silicon/com.simba.silicon.startscreen.CircleMenuScreen}: java.lang.NullPointerException
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.os.Looper.loop(Looper.java:137)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.ActivityThread.main(ActivityThread.java:5103)
03-31 11:39:56.371: E/AndroidRuntime(811):  at java.lang.reflect.Method.invokeNative(Native Method)
03-31 11:39:56.371: E/AndroidRuntime(811):  at java.lang.reflect.Method.invoke(Method.java:525)
03-31 11:39:56.371: E/AndroidRuntime(811):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
03-31 11:39:56.371: E/AndroidRuntime(811):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-31 11:39:56.371: E/AndroidRuntime(811):  at dalvik.system.NativeStart.main(Native Method)
03-31 11:39:56.371: E/AndroidRuntime(811): Caused by: java.lang.NullPointerException
03-31 11:39:56.371: E/AndroidRuntime(811):  at com.zippy.zippyapp.startscreen.CircleMenuScreen.onCreate(CircleMenuScreen.java:127)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.Activity.performCreate(Activity.java:5133)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-31 11:39:56.371: E/AndroidRuntime(811):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
03-31 11:39:56.371: E/AndroidRuntime(811):  ... 11 more

Answer 1

当然，您尝试传递图像的mp3文件。您要做的是在 res/文件夹中创建一个原始文件夹。

然后，当您调用媒体播放器时，请执行以下操作：

MediaPlayer md = MediaPlayer.create(context, R.raw.click21);
    md.setOnPreparedListener(new OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            // TODO Auto-generated method stub
            mp.start();
        }
    });
    md.prepareAsync();