MediaPlayer 导致 FC 错误

Question

好的，我收到了这个 FC 错误。

我已经检查了三遍代码并尝试了两次重写。这是我能够学习的最有效的代码。但我仍然得到FC。 当我试图为我的程序播放大约 50 个声音文件时，我将不胜感激。每个活动十五到二十之间。

implements OnClickListener {
MediaPlayer mp1;
MediaPlayer mp2;
MediaPlayer mp3;
MediaPlayer mp4;
MediaPlayer mp5;
MediaPlayer mp6;
MediaPlayer mp7;



public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.verbs);

    mp1 = MediaPlayer.create(this, R.raw.play);
    mp2 = MediaPlayer.create(this, R.raw.eat);
    mp3 = MediaPlayer.create(this, R.raw.can);
    mp4 = MediaPlayer.create(this, R.raw.go);
    mp5 = MediaPlayer.create(this, R.raw.help);
    mp6 = MediaPlayer.create(this, R.raw.practice);
    mp7 = MediaPlayer.create(this, R.raw.use);





    final Button button1 = (Button) findViewById(R.id.play_button);
    button1.setOnClickListener(this);

    final Button button2 = (Button) findViewById(R.id.eat_button);
    button2.setOnClickListener(this);

    final Button button3 = (Button) findViewById(R.id.can_button);
    button3.setOnClickListener(this);

    final Button button4 = (Button) findViewById(R.id.go_button);
    button4.setOnClickListener(this);

    final Button button5 = (Button) findViewById(R.id.Thelp_button);
    button5.setOnClickListener(this);

    final Button button6 = (Button) findViewById(R.id.pract_button);
    button6.setOnClickListener(this);

    final Button button7 = (Button) findViewById(R.id.use_button);
    button7.setOnClickListener(this);

    final Button button8 = (Button) findViewById(R.id.Back_Button);
    button8.setOnClickListener(this);



}

  public void onClick(View v) {
    switch(v.getId()) {
    case R.id.play_button:
        mp1.start();
        Toast.makeText(VerbsActivity.this, "PLAY",
                Toast.LENGTH_LONG).show();
        break;
    case R.id.eat_button:
        mp2.start();
        Toast.makeText(VerbsActivity.this, "EAT",
                Toast.LENGTH_LONG).show();
        break;
    case R.id.can_button:
        mp3.start();
        Toast.makeText(VerbsActivity.this, "CAN",
                Toast.LENGTH_LONG).show();
        break;
    case R.id.go_button:
        mp4.start();
        Toast.makeText(VerbsActivity.this,"GO",
                Toast.LENGTH_LONG).show();
        break;
    case R.id.Thelp_button:
        mp5.start();
        Toast.makeText(VerbsActivity.this,"HELP",
                Toast.LENGTH_LONG).show();
        break;
    case R.id.pract_button:
        mp6.start();
        Toast.makeText(VerbsActivity.this, "PRACTICE",
                Toast.LENGTH_LONG).show();
        break;
    case R.id.use_button:
        mp7.start();
        Toast.makeText(VerbsActivity.this, "USE",
                Toast.LENGTH_LONG).show();
        break;

    case R.id.Back_Button:
        finish();
        break;

    }
}

@Override
protected void onDestroy() {
      mp1.release();
      mp2.release();
      mp3.release();
      mp4.release();
      mp5.release();
      mp6.release();
      mp7.release();

    super.onDestroy();
}

}

Answer 1

您正在创建太多的 MediaPlayer 对象，这很容易导致异常。您也在 onDestroy() 方法中释放它们，在很多情况下不会调用。

更改您的代码以改用 SoundPool。

Answer 2

哇！为什么要使用这么多 MediaPlayer 对象？为什么不拥有一个媒体播放器对象，然后在单击该按钮时为其分配资源？我不知道你的应用程序是做什么的，但我会像这样编写上面的代码（或至少一个 sn-p）：

MediaPlayer mp1;    //just have one MediaPlayer object.

public void onClick(View v) {
      switch(v.getId()) {
      case R.id.n1_button:
            if(mp1.create(this, R.raw.sound1) == NULL) {
              Log.v(this.toString(), "Unable to create mediaplayer object.");
            }
            try {
      mp1.start();
    } catch(IllegalStateException e) {
      e.printStackTrace();
     Log.v(this.toString(), "Illegal State Exception caught in start.");
    }
          Toast.makeText(NounsActivity.this, "word",
                       Toast.LENGTH_LONG).show();
        break;
      case R.id.n2_button:
        if(mp1.create(this, R.raw.sound1) == NULL) {
              Log.v(this.toString(), "Unable to create mediaplayer object.");
         }
         try {
    mp1.start();
      } catch(IllegalStateException e) {
    e.printStackTrace();
        Log.v(this.toString(), "Illegal State Exception caught in start.");
      }

          Toast.makeText(NounsActivity.this, "word",
                       Toast.LENGTH_LONG).show();
        break; and so on....

 @Override
    protected void onDestroy() {
        mp1.release();     //you just need to release one mediaplayer object now. 
        super.onDestroy();
    }

但更一般的注意事项：将所有在 try 和 catch 语句块中调用 MediaPlayer 的语句包围起来，并通过将某些内容打印到 LogCat 的 copius 语句为自己提供轻松调试的好处。您可以获取有关将调试信息打印到 LogCat here 和 MediaPlayer 文档的更多信息，了解关于哪个语句抛出哪个异常 here。

HTH，
斯里拉姆。

Answer 3

仅根据 Sriram 的建议进行错误检查即可回答问题。

为 soundpool 错误启动新线程以使其更清晰。