如何在AlertDialog上禁用系统声音效果？

Question

我有一个带2个按钮的AlertDialog.我希望他们在点击时播放我的自定义声音.所以我在每个按钮上都有这个代码:

SoundUtility.getInstance(Add_Edit_Note.this).playPositive();

SoundUtility是我写的用来播放自定义声音的类.这是问题所在:它确实播放我的自定义声音,但它同时也播放系统声音效果,所以我有两个声音在同一时间播放.我可以通过重写Button来在常规按钮上禁用它:

public class AppButton extends Button {

public AppButton(Context context, AttributeSet attrs) {
    super(context, attrs);
    // Disable sound effect
    this.setSoundEffectsEnabled(false);
}

}

然后在我的XML文件中:

<com.my.app.AppButton
    ... />

但我找不到在AlertDialog按钮上禁用这些系统声音效果的方法.有什么建议？

编辑

根据要求,这是SoundUtility代码:

public class SoundUtility {
private static SoundUtility soundInstance;
private MediaPlayer mpPositive;
private MediaPlayer mpNegative;

public static SoundUtility getInstance(Context context){

    if(soundInstance==null)
    {
        soundInstance = new SoundUtility(context);
    }

    return soundInstance;
}

private SoundUtility (Context context)
{
    mpPositive = MediaPlayer.create(context, R.raw.click_positive);
    mpNegative = MediaPlayer.create(context, R.raw.click_negative);
}

// Playing positive sound
public void playPositive() {
    mpPositive.start();
}

// Playing negative sound
public void playNegative() {
    mpNegative.start();
}

// Releasing MediaPlayer
public void releaseMediaPlayer() {
    mpPositive.release();
    mpNegative.release();
}

}

编辑2

我的AlertDialog的代码:

AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("Are you sure you want to cancel?")
        .setCancelable(false) // The dialog is modal, a user must provide an answer
        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            // If the answer is Yes
            public void onClick(DialogInterface dialog, int id) {
                ...
                setResult(RESULT_CANCELED); // Setting result as cancelled and returning it to main activity
                SoundUtility.getInstance(Add_Edit_Note.this).playPositive(); // Play positive sound
                Add_Edit_Note.this.finish(); // Closing current activity
            }
        })
        .setNegativeButton("No", new DialogInterface.OnClickListener() {
            // If the answer is No
            public void onClick(DialogInterface dialog, int id) {
                SoundUtility.getInstance(Add_Edit_Note.this).playNegative(); // Play negative sound
                dialog.cancel(); // Closing the confirmation dialog
            }
        });
builder.create().show(); // Present the dialog to the user

Answer 1

试试这个

Button btn = dialog.getButton(Dialog.BUTTON_POSITIVE); 
btn.setSoundEffectsEnabled(false);

呼叫setSoundEffectsEnabled您拥有的所有按钮

编辑:

代替

 builder.create().show();

使用

AlertDialog dialog = builder.create();
dialog.show();

Button btn = dialog.getButton(Dialog.BUTTON_POSITIVE); 
btn.setSoundEffectsEnabled(false);

Button btn2 = dialog.getButton(Dialog.BUTTON_NEGATIVE); 
btn2.setSoundEffectsEnabled(false);