android - 如何在android中以编程方式设置声音打开和关闭

Question

在我的 JumbledWords 游戏应用程序中，我提供了打开和关闭声音的选项。问题是我无法做到这一点。我已经为其编写了代码，但它不起作用。

SplashScreen.java

RadioButton rbSoundOn, rbSoundOff;
JumbledWords jw = new JumbledWords();
@Override
public void onCreate(Bundle bundle)
{
    super.onCreate(bundle);

    //set the full screen view of the activity
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.splash_screen);

    rbSoundOn =  (RadioButton)findViewById(R.id.optSoundOn);
    rbSoundOff =  (RadioButton)findViewById(R.id.optSoundOff);

    if(rbSoundOn.isChecked() == true)
    {
        jw.setSoundOn(true);
    }
    else
    {
        jw.setSoundOn(false);
    }}

JumbledWords.java

static boolean soundOn;
public void setSoundOn(boolean soundOn)
{
    this.soundOn = soundOn;
}

public boolean isSoundOn()
{
    return soundOn; 
}

public void checkWord()
{
    if(abcd.equalsIgnoreCase(etGuessedWord.getText().toString()))
    {
        WordLibrary.setMyInt(WordLibrary.getMyInt() + 10);
        tvScore.setText(String.valueOf(WordLibrary.getMyInt()));
        if(soundOn == true)
        {
         mp = MediaPlayer.create(this, R.raw.clap);
         mp.start();

         mp.setOnCompletionListener(new OnCompletionListener(){

            @Override
            public void onCompletion(MediaPlayer arg0) {
                // TODO Auto-generated method stub
                mp.release();
            }

         });
        }
    }
    else
    {
        if(soundOn == true)
        {
         mp = MediaPlayer.create(this, R.raw.oop);
         mp.start();

         mp.setOnCompletionListener(new OnCompletionListener(){

                @Override
                public void onCompletion(MediaPlayer arg0) {
                    // TODO Auto-generated method stub
                    mp.release();
                }

             });
        }


    }
}

我的问题是，如果我使用“关闭”选项，我的声音就会播放，在这种情况下一定不会发生这种情况。请帮助我。

Answer 1

您实际上并没有处理对单选按钮的更改。

您需要定义RadioGroup控件来包装您的RadioButton控件，并定义单选按钮的“组”；然后在 RadioGroup 上调用 setOnCheckedChangeListener() 来定义一个监听器，当状态更改时将调用该监听器。您需要在此监听器中检查各个按钮的状态并调用 jw.setSoundOn();，而不是在 onCreate() 方法中执行此操作:

public void onCreate(Bundle bundle)
{
    super.onCreate(bundle);

    //set the full screen view of the activity
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.splash_screen);
    RadioGroup group = (RadioGroup)findViewById( R.id.optSoundGroup );
    final RadioButton rbSoundOn =  (RadioButton)findViewById(R.id.optSoundOn);
    final RadioButton rbSoundOff =  (RadioButton)findViewById(R.id.optSoundOff);
    group.setOnCheckedChangeListener( new OnCheckedChangeListener() {
        @Override
        void onCheckedChanged(RadioGroup group, int checkedId)
        {
            if(rbSoundOn.isChecked() == true)
            {
                jw.setSoundOn(true);
            }
            else
            {
                jw.setSoundOn(false);
            }
        }
    } );
}