android - 列表对话框中的图标

Question

我一直在搜索 ListDialogs 。只要你可以把你想要的元素放在:

builder.setItems(items, new DialogInterface.OnClickListener() 
{
   public void onClick(DialogInterface dialog, int item) 
   {
                        
   }
});

想想 items 对象，它是一个像这样的 CharSequence:

CharSequence[] items = getResources().getStringArray(R.array.share_dialog_list);

我想知道是否有办法(一定是其他人做到了)使其存在，但使用左侧图标的自定义 View ，如下所示:

Answer 1

这是一个完整的解决方案，带有一个允许图标的扩展 ArrayAdapter。

请参阅 http://developer.android.com/design/building-blocks/dialogs.html 上的对话框设计说明http://developer.android.com/design/style/iconography.html和 IconPacks 在 http://developer.android.com/design/downloads/index.html

请注意，这些尺寸在 48 x 48 dp 时看起来相当不错，这不是 bundle 尺寸，因此您必须从下载中缩放您自己的图标。

用法:

            @Override
        public void onClick(View v) {
            final String [] items = new String[] {"From Gallery", "From Camera"};
            final Integer[] icons = new Integer[] {R.drawable.dialog_gallery_icon, R.drawable.dialog_camera_icon};
            ListAdapter adapter = new ArrayAdapterWithIcon(getActivity(), items, icons);

            new AlertDialog.Builder(getActivity()).setTitle("Select Image")
                .setAdapter(adapter, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int item ) {
                        Toast.makeText(getActivity(), "Item Selected: " + item, Toast.LENGTH_SHORT).show();
                    }
            }).show();
        }

ArrayAdapterWithIcon.java

public class ArrayAdapterWithIcon extends ArrayAdapter<String> {

private List<Integer> images;

public ArrayAdapterWithIcon(Context context, List<String> items, List<Integer> images) {
    super(context, android.R.layout.select_dialog_item, items);
    this.images = images;
}

public ArrayAdapterWithIcon(Context context, String[] items, Integer[] images) {
    super(context, android.R.layout.select_dialog_item, items);
    this.images = Arrays.asList(images);
}

public ArrayAdapterWithIcon(Context context, int items, int images) {
    super(context, android.R.layout.select_dialog_item, context.getResources().getTextArray(items));

    final TypedArray imgs = context.getResources().obtainTypedArray(images);
    this.images = new ArrayList<Integer>() {{ for (int i = 0; i < imgs.length(); i++) {add(imgs.getResourceId(i, -1));} }};

    // recycle the array
    imgs.recycle();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View view = super.getView(position, convertView, parent);
    TextView textView = (TextView) view.findViewById(android.R.id.text1);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        textView.setCompoundDrawablesRelativeWithIntrinsicBounds(images.get(position), 0, 0, 0);
    } else {
        textView.setCompoundDrawablesWithIntrinsicBounds(images.get(position), 0, 0, 0);
    }
    textView.setCompoundDrawablePadding(
            (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 12, getContext().getResources().getDisplayMetrics()));
    return view;
}

}