android - 删除 AlertDialog 背景

Question

我的 AlertDialog 中有一个自定义布局，其中有一个 ListView。现在我想删除 AlertDialog 的黑色背景。

           AlertDialog.Builder builder = new AlertDialog.Builder(this);
            LayoutInflater inflater = this.getLayoutInflater();
            View dialogView = inflater.inflate(R.layout.rate_card_layout, null);
            Button close = (Button) dialogView.findViewById(R.id.btnClose);
            close.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View arg0) {

                    dialog.dismiss();
                }
            });


            ListView lv = (ListView)dialogView.findViewById(R.id.listView1);
            RateListAdapter rLAdapter = new RateListAdapter(SActivity.this,
                    listItemsArray);
            lv.setAdapter(rLAdapter);

            builder.setView(dialogView);
            final Dialog dialog = builder.create();

            dialog.show();

我尝试添加

dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));

像往常一样。但这不起作用。

任何帮助将不胜感激。

Answer 1

尝试

private void updateLayoutParams() {
    Window window = getDialog().getWindow();
    WindowManager.LayoutParams params = window.getAttributes();
    params.dimAmount = 0.2f;

    int margin = getResources().getInteger(R.integer.common_margin);
    DisplayMetrics metrics = new DisplayMetrics();
    ((WindowManager) getActivity().getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getMetrics(metrics);
    params.width = metrics.widthPixels-margin;

    window.setAttributes(params);
    window.setBackgroundDrawableResource(android.R.color.transparent);
    getDialog().setCanceledOnTouchOutside(false);

}
@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    Log.d(TAG, "onConfigurationChanged");

    updateLayoutParams();
}