Question

我正在制作一个基本课程，使用一个按钮播放声音，并使用不同的按钮移动到下一个屏幕。问题是，使用声音按钮后，下一个按钮会崩溃应用程序。我以为是因为我发布声音然后检查它，但它仍然崩溃。

public class Explain1 extends Activity
{
    MediaPlayer mysound;
    protected boolean active = true;
    protected int splashtime = 17000;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.exp1);
        mysound=MediaPlayer.create(Explain1.this, R.raw.ex1 );
    }
    @Override
        protected void onDestroy()
        {

            super.onDestroy();
            mysound.stop();
            mysound.reset();
            mysound.release();
            mysound = null;
        }
    public void cont(View view) 
    {
        if(mysound.isPlaying())
        {
            mysound.stop();
            mysound.reset();
            mysound.release();

            Log.d("Exercise", "Sound Stopped");
        }
        Intent i = new Intent();
        i.setClassName("com.example","com.example.timestableseasy.Explain2");
        startActivity(i); 
    }

  public void listen(View view) 
    {
        mysound=MediaPlayer.create(Explain1.this, R.raw.ex1 );
        mysound.setOnCompletionListener(new OnCompletionListener() {
            public void onCompletion(MediaPlayer mysound) 
            {
                mysound.stop();
                mysound.release();
                mysound=MediaPlayer.create(Explain1.this, R.raw.ex1 );
                Log.d("Exercise", "Sound PLayed");
            }

        });   
        mysound.start();

    }

}

这是日志猫。

06-10 14:35:39.444: E/AndroidRuntime(30611): FATAL EXCEPTION: main
06-10 14:35:39.444: E/AndroidRuntime(30611): java.lang.IllegalStateException: Could not execute method of the activity
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.view.View$1.onClick(View.java:3814)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.view.View.performClick(View.java:4421)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.view.View$PerformClick.run(View.java:17903)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.os.Handler.handleCallback(Handler.java:730)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.os.Handler.dispatchMessage(Handler.java:92)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.os.Looper.loop(Looper.java:213)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.app.ActivityThread.main(ActivityThread.java:5225)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at java.lang.reflect.Method.invokeNative(Native Method)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at java.lang.reflect.Method.invoke(Method.java:525)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at dalvik.system.NativeStart.main(Native Method)
06-10 14:35:39.444: E/AndroidRuntime(30611): Caused by: java.lang.reflect.InvocationTargetException
06-10 14:35:39.444: E/AndroidRuntime(30611):    at java.lang.reflect.Method.invokeNative(Native Method)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at java.lang.reflect.Method.invoke(Method.java:525)
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.view.View$1.onClick(View.java:3809)
06-10 14:35:39.444: E/AndroidRuntime(30611):    ... 11 more
06-10 14:35:39.444: E/AndroidRuntime(30611): Caused by: java.lang.IllegalStateException
06-10 14:35:39.444: E/AndroidRuntime(30611):    at android.media.MediaPlayer.isPlaying(Native Method)  
06-10 14:35:39.444: E/AndroidRuntime(30611):    at com.example.timestableseasy.Explain1.cont(Explain1.java:38)
06-10 14:35:39.444: E/AndroidRuntime(30611):    ... 14 more

这可能很简单，但我看不出问题出在哪里。

Answer 1

您不应release MediaPlayer的连接。足够的事情是reset。

release（）：   此方法释放随MediaPlayer对象附加的所有资源

重置（）：   此方法重置媒体播放器

你需要做的是

mp.reset(); mp.setDataSource(/*Code to provide data source*/); mp.prepare(); mp.start();

请检查此Media Player Example。

播放声音后尝试移动到下一个屏幕时Android应用程序崩溃

1 个答案: