Setting TextView's left drawable with Fresco

Question

I've been struggling with this for a while now, using this guide:

http://frescolib.org/docs/writing-custom-views.html

But it suggests writing my own onDraw method, I just want to set TextView's compound drawable. How do I do that?

Why don't you do it using an ImageView on the left side of the TextView? — user2520215, May 23 '15 at 22:20
have you googled? setCompountintrisict blah blah blah, sorry about that i have forgotten the method. i just [researched](https://www.google.com/search?q=Textview+setcompoundintrisic&ie=utf-8&oe=utf-8) it now — Elltz, May 23 '15 at 22:29
You can try extending TextView, adding a background on the left side, and giving it a default paddingLeft of size: width of the drawble. — user2520215, May 23 '15 at 22:30

score 2 · Accepted Answer · answered May 29 '15 at 11:19

You don't need to override onDraw, since TextView already does that for you. You can do something like this:

class MyTextView extends TextView {
  MultiDraweeHolder mMultiDraweeHolder;

  // called from constructors
  private void init() {
    mMultiDraweeHolder = new MultiDraweeHolder<GenericDraweeHierarchy>();
    GenericDraweeHierarchyBuilder builder = 
        new GenericDraweeHierarchyBuilder(getResources());
    for (int i = 0; i < 4; i++) {
      GenericDraweeHierarchy hierarchy = builder.reset()
        .set...
        .build();
      mMultiDraweeHolder.add(
          new DraweeHolder<GenericDraweeHierarchy>(hierarchy, getContext()));
  }

To actually set URIs and bounds:

// build DraweeController as in Fresco docs
DraweeHolder<GenericDraweeHierarchy> holder = mMultiDraweeHolder.get(i);
holder.setController(controller);
holder.getTopLevelDrawable().setBounds(...)

To assign them to your TextView:

List<Drawable> drawables = new ArrayList<>();
for (int i = 0; i < 4; i++) {
  drawables.add(mMultiDraweeHolder.get(i).getTopLevelDrawable());
}
setCompoundDrawables(
    drawables.get(0), drawables.get(1), drawables.get(2), drawables.get(3));

Your TextView still needs to override the onDetachedFromWindow and other methods as explained in the docs, but you should be able to paste that code as is.

Setting TextView's left drawable with Fresco

1 Answers1