更改警报对话框的文本颜色

Question

我有一个弹出下载音频指令在我的应用程序。我正在尝试做的是，我想改变默认的文本颜色“OK”为蓝色。我试了一些东西，但不起作用。下面是我的代码：

 private void showDownloadPgmPopup() {

    android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(getActivity());
    builder.setTitle("Download instructional audio?");
    builder.setMessage(ParamConstants.AUDIODOWNLOADPERMISSION);
    builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            WwDatabaseHelper.storeSelectedWeekAndDay(getActivity(), mSelectedWeekDataModel);
            goToMoveScreen();
        }
    });
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            AndroidDownloadFileByProgressBarActivity.StartAudioAssetDownload(getActivity());

        }

    }).create();
    // change the text color of download instruction ok button


    final android.app.AlertDialog dialog = builder.show();
    dialog.setOnShowListener( new DialogInterface.OnShowListener() {
                                  @Override
                                  public void onShow(DialogInterface arg0) {
                                      dialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.parseColor("#ff5722"));
                                  }
                              });
    dialog.setCanceledOnTouchOutside(false);
    dialog.show();
}

但这种改变并没有反映出，有谁能告诉我，我做错了什么？

Answer 1

必须在AlertDialog构造函数中提供自定义样式id：

AlertDialog.Builder(Context context, int themeResId)

样式文件应该类似于：

<style name="AlertDialogCustom" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="android:colorAccent">#0000FF</item>
</style>