由于不推荐使用onPrepareDialog,因此您可以使用onShowListener.

你也应该设置Drawable边界,或者它将被放置在最左边.

下面的代码输出

public class MyDialog extends DialogFragment {

@Override

public Dialog onCreateDialog(Bundle savedInstanceState) {

final AlertDialog dialog = new AlertDialog.Builder(getActivity())

.setTitle("My Dialog")

.setNegativeButton("Cancel", new OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

}

}).setPositiveButton("Play", new OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

}

}).create();

dialog.setOnShowListener(new OnShowListener() {

@Override

public void onShow(DialogInterface dialogInterface) {

Button button = dialog.getButton(AlertDialog.BUTTON_POSITIVE);

// if you do the following it will be left aligned, doesn't look

// correct

// button.setCompoundDrawablesWithIntrinsicBounds(android.R.drawable.ic_media_play,

// 0, 0, 0);

Drawable drawable = getActivity().getResources().getDrawable(

android.R.drawable.ic_media_play);

// set the bounds to place the drawable a bit right

drawable.setBounds((int) (drawable.getIntrinsicWidth() * 0.5),

0, (int) (drawable.getIntrinsicWidth() * 1.5),

drawable.getIntrinsicHeight());

button.setCompoundDrawables(drawable, null, null, null);

// could modify the placement more here if desired

// button.setCompoundDrawablePadding();

}

});

return dialog;

}

}