Dialog 客製化 (icon + text)
===
### 原始

String[] opts = new String[] { "建立資料夾", "上傳檔案", "開啟相機", "上傳相片、影片" };

AlertDialog.Builder builder = new AlertDialog.Builder(activity);

builder.setTitle("Share Appliction"); // dialog title
//mBuilder.setIcon(R.drawable.ic_baseline_info_24); // dialog icon

builder.setItems(opts, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialogInterface, int i) {
        Toast.makeText(activity, opts[i], Toast.LENGTH_SHORT).show();
    }
});

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

### 客製化

* 自訂 dialog item 的內容物件

public static class DialogItem {
    public final String text;
    public final int icon;
    public DialogItem(String text, Integer icon) {
        this.text = text;
        this.icon = icon;
    }

    @Override
    public String toString() {
        return text;
    }
}

* 新增一 `ArrayAdapter` 物件, 用來客製 dialog item

final DialogItem[] items = {
    new DialogItem("建立資料夾", R.drawable.ic_baseline_folder_24),
    new DialogItem("上傳檔案", R.drawable.ic_baseline_insert_drive_file_24),
    new DialogItem("開啟相機", R.drawable.ic_baseline_photo_camera_24),
    new DialogItem("上傳相片、影片", R.drawable.ic_baseline_photo_24),
};

ListAdapter adapter = new ArrayAdapter<DialogItem> (
    activity,
    
    /** 範例是使用系統提供的佈局檔, 這裡可以直接拷貝一份改成自己想要的樣式, 比如顏色、間隔、大小等等 */
    R.layout.dialog_item, // 參考範例所使用的 android.R.layout.select_dialog_item
    
    /** 佈局檔中的 text 元件 */
    R.id.tv_dialogItem,
    
    items
){
    public View getView(int position, View convertView, ViewGroup parent) {
        //Use super class to create the View
        View v = super.getView(position, convertView, parent);
        TextView tv = (TextView)v.findViewById(R.id.tv_dialogItem);

        //Put the image on the TextView
        tv.setCompoundDrawablesWithIntrinsicBounds(items[position].icon, 0, 0, 0);

        //Add margin between image and text (support various screen densities)
        int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
        tv.setCompoundDrawablePadding(dp5);

        return v;
    }
};

AlertDialog.Builder builder = new AlertDialog.Builder(context);

builder.setTitle("Share Appliction"); // dialog title
// builder.setIcon(R.drawable.ic_baseline_info_24); // dialog icon
builder.setAdapter(
    adapter,
    new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            Toast.makeText(activity, items[i].text, Toast.LENGTH_SHORT).show();
        }
    }
);

builder.show();

## Ref.
[How to add an icon before each item in alert dialog?](https://stackoverflow.com/questions/3920640/how-to-add-an-icon-before-each-item-in-alert-dialog)

###### tags: `Dialog`