无法在 android 上播放声音文件。有运行时错误

Question

这是我的代码：

            String a = "R.raw."+b;//b  is a  user  input
            int toSpeak = Integer.parseInt(a);
            sound = MediaPlayer.create(trans.this, toSpeak);

            sound.start();
            sound.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {                          
            @Override
            public void onCompletion(MediaPlayer mp) {
                // TODO Auto-generated method stub
                sound.release();
                sound = null;
                }
            });

这些是我的错误：

02-09 05:54:44.998: W/dalvikvm(1392): threadid=1: thread exiting with uncaught exception (group=0xb4a38b90)

02-09 05:54:45.008: E/AndroidRuntime(1392): FATAL EXCEPTION: main

02-09 05:54:45.008: E/AndroidRuntime(1392): Process: com.translator.ite, PID: 1392

02-09 05:54:45.008: E/AndroidRuntime(1392): java.lang.NumberFormatException: Invalid int: "R.raw.abandon"

02-09 05:54:45.008: E/AndroidRuntime(1392):     at java.lang.Integer.invalidInt(Integer.java:137)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at java.lang.Integer.parse(Integer.java:374)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at java.lang.Integer.parseInt(Integer.java:365)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at java.lang.Integer.parseInt(Integer.java:331)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at com.translator.ite.trans.onClick(trans.java:60)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at android.view.View.performClick(View.java:4424)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at android.view.View$PerformClick.run(View.java:18383)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at android.os.Handler.handleCallback(Handler.java:733)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at android.os.Handler.dispatchMessage(Handler.java:95)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at android.os.Looper.loop(Looper.java:137)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at android.app.ActivityThread.main(ActivityThread.java:4998)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at java.lang.reflect.Method.invokeNative(Native Method)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at java.lang.reflect.Method.invoke(Method.java:515)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)

02-09 05:54:45.008: E/AndroidRuntime(1392):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

使用 getIdentifier 获取资源 ID 使用名称：

int toSpeak = getResources().getIdentifier("raw/"+b, null, getPackageName());

Answer 2

我有那种错误。我的最终代码适合我：

final MediaPlayer mPlayer;
mPlayer = MediaPlayer.create(getApplicationContext(), R.raw.primeste_inactiv);
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
mPlayer.start();
mPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
  mPlayer.reset();
  mPlayer.release();
                    }
                });

我的代码多了一行：

mPlayer.reset();

无法在 android 上播放声音文件。有运行时错误

can't play a sound file on android. having runtime errors

android

logcat