Question

我正在尝试制作一个在按钮点击时播放特定声音的应用程序，我有100个静态创建的按钮不在数组或任何东西中，并且我正确地将声音分配给每个按钮，问题是，在播放了一些按钮它给了我错误我的问题

任何方式我都可以从这个混乱中切换到通用代码
无论如何，我可以停止收到此错误，并且无论发出多少声音，声音都会继续在每个按钮上工作？

以下是我的代码：

   package com.example.buttonsdemo;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


       Button messageButton_0 = (Button) findViewById(R.id.akali);
       final MediaPlayer mpButtonClick_0= MediaPlayer.create(this,R.raw.akali) ;
       messageButton_0.setOnClickListener(new View.OnClickListener() {

           @Override
           public void onClick(View arg0) {

              mpButtonClick_0.start();
              if(!mpButtonClick_0.isPlaying()){
                 mpButtonClick_0.stop();
                 mpButtonClick_0.release();
              }

     }  
});

对于100个以上的按钮，它会继续这样，所以任何帮助都是pz

Logcat:
03-04 16:21:21.925: E/MediaPlayer(5769): error (-19, 0)
03-04 16:21:21.925: E/MediaPlayer(5769): stop called in state 0
03-04 16:21:21.925: E/MediaPlayer(5769): error (-38, 0)
03-04 16:21:22.067: W/MediaPlayer(5769): mediaplayer went away with unhandled events
03-04 16:21:22.067: W/MediaPlayer(5769): mediaplayer went away with unhandled events
03-04 16:21:22.115: D/AndroidRuntime(5769): Shutting down VM
03-04 16:21:22.115: W/dalvikvm(5769): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
03-04 16:21:22.145: E/AndroidRuntime(5769): FATAL EXCEPTION: main
03-04 16:21:22.145: E/AndroidRuntime(5769): java.lang.IllegalStateException
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.media.MediaPlayer._start(Native Method)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.media.MediaPlayer.start(MediaPlayer.java:1025)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at com.example.buttonsdemo.MainActivity$39.onClick(MainActivity.java:766)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.view.View.performClick(View.java:4204)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.view.View$PerformClick.run(View.java:17355)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.os.Handler.handleCallback(Handler.java:725)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.os.Handler.dispatchMessage(Handler.java:92)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.os.Looper.loop(Looper.java:137)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at android.app.ActivityThread.main(ActivityThread.java:5041)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at java.lang.reflect.Method.invokeNative(Native Method)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at java.lang.reflect.Method.invoke(Method.java:511)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-04 16:21:22.145: E/AndroidRuntime(5769):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

从错误消息中可以看出，当start处于错误状态时，会调用MediaPlayer 03-04 16:21:21.925: E/MediaPlayer(5769): stop called in state 0。来自您的消息，

MEDIA_PLAYER_STATE_ERROR

状态0对应03-04 16:21:21.925: E/MediaPlayer(5769): error (-38, 0)

INVALID_OPERATION

错误号。 -38对应MediaPlayer::start的{{1}}。请注意INVALID_OPERATION设为-ENOSYS，errno.h -38 。

您可能需要调查MediaPlayer处于错误状态的原因。

Answer 2

您需要查看MediaPlayer.start和the State Diagram的文档。

您可能在MediPlayer处于其中一种无效状态（{Idle，Initialized，Stopped，Error}）时调用MediPlayer，这会导致异常。

错误（-19,0）Mediaplayer

2 个答案: