基本上，当我单击一个按钮时，它会播放声音，它是一个音板。我遇到的主要问题是当我release(); 第一次使用播放音频时，当我再次播放声音时，它只会使应用程序崩溃。我在方法中尝试了许多组合OnCompletion，改变它们，什么都没有。无论我放什么代码，当我放release();它时它都会崩溃。这是我的代码；
public class MyClass extends Activity{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_view);
this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
final MediaPlayer mpB1 = MediaPlayer.create(this, R.raw.s101);
final MediaPlayer mpB2 = MediaPlayer.create(this, R.raw.s102);
<etc>
Button b1 = (Button) findViewById(R.id.sound101);
b1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
mpB1.start();
mpB1.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mpB1) {
// TODO Auto-generated method stub
onPause();
onStop();
mpB1.release();
}
});
}
});
Button b2 = (Button) findViewById(R.id.sound102);
b2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
mpB2.start();
mpB2.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
onPause();
onStop();
mpB2.release();
}
});
}
});
<etc, you get the idea.. soundboard>
这是我的 LogCat；
01-01 02:58:53.218: E/AndroidRuntime(682): FATAL EXCEPTION: main
01-01 02:58:53.218: E/AndroidRuntime(682): java.lang.IllegalStateException
01-01 02:58:53.218: E/AndroidRuntime(682): at android.media.MediaPlayer._start(Native Method)
01-01 02:58:53.218: E/AndroidRuntime(682): at android.media.MediaPlayer.start(MediaPlayer.java:819)
01-01 02:58:53.218: E/AndroidRuntime(682): at 'com.package'$1.onClick('Class'.java:73)
01-01 02:58:53.218: E/AndroidRuntime(682): at android.view.View.performClick(View.java:2485)
01-01 02:58:53.218: E/AndroidRuntime(682): at android.view.View$PerformClick.run(View.java:9080)
01-01 02:58:53.218: E/AndroidRuntime(682): at android.os.Handler.handleCallback(Handler.java:587)
01-01 02:58:53.218: E/AndroidRuntime(682): at android.os.Handler.dispatchMessage(Handler.java:92)
01-01 02:58:53.218: E/AndroidRuntime(682): at android.os.Looper.loop(Looper.java:123)
01-01 02:58:53.218: E/AndroidRuntime(682): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-01 02:58:53.218: E/AndroidRuntime(682): at java.lang.reflect.Method.invokeNative(Native Method)
01-01 02:58:53.218: E/AndroidRuntime(682): at java.lang.reflect.Method.invoke(Method.java:507)
01-01 02:58:53.218: E/AndroidRuntime(682): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-01 02:58:53.218: E/AndroidRuntime(682): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-01 02:58:53.218: E/AndroidRuntime(682): at dalvik.system.NativeStart.main(Native Method)
而已。谁能猜出问题所在？我试图调试这个问题，弄乱了 IllegalStateException。我不知道怎么做。