如何将 int 转换为 drawable？

现在我想获取选定的图标并将其设置为我的活动中的图像视图。

那么我怎样才能将它转换成可绘制的，以便我可以在我的活动的图像视图上设置选定的图标呢？

对话代码：

  private void showAlertDialog() {
        GridView gridView = new GridView(this);
        gridView.setGravity(Gravity.CENTER);
        gridView.setPadding(0,20,0,20);
        int[] mThumbIds = {
                R.drawable.roundicons05,R.drawable.roundicons08,R.drawable.roundicons02,R.drawable.roundicons03,R.drawable.roundicons04,
                R.drawable.roundicons16,R.drawable.roundicons37,R.drawable.roundicons06,R.drawable.roundicons07,R.drawable.roundicons05,
                R.drawable.roundicons09,R.drawable.roundicons10,R.drawable.roundicons11,R.drawable.roundicons12,R.drawable.roundicons13,
                R.drawable.roundicons14,R.drawable.roundicons15,R.drawable.roundicons16,R.drawable.roundicons17,R.drawable.roundicons18,
                R.drawable.roundicons19,R.drawable.roundicons20,R.drawable.roundicons22,
        gridView.setAdapter(new ImageAdapter(CheckListActivity.this,mThumbIds));
        gridView.setNumColumns(4);
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                // do something here
             //   icon.setImageDrawable(id);
                imageId = position;
                Drawable drawable = getResources().getDrawable(imageId);
                icon.setImageDrawable(drawable);
        final MaterialDialog dialog = new MaterialDialog.Builder(CheckListActivity.this)
                .customView(gridView, false)
                .title("Select Icon")
                .negativeText("CANCEL")
                .canceledOnTouchOutside(true)
                .build();
        dialog.show();
我这样试过
  imageId = position;
  Drawable drawable = getResources().getDrawable(imageId);
  icon.setImageDrawable(drawable);
但这会引发未发现资源异常。
原文由 user6265109 发布，翻译遵循 CC BY-SA 4.0 许可协议