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PODisplay animatable instead of text on a button when clicked
 

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  1. PODisplay animatable instead of text on a button when clicked
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    <p>I am trying to build a button with a progress bar which is displayed in the center of the button and instead of text, as soon as the button is tapped, and while some background processing takes place. What I am doing is to have a custom button and set the animatable as a drawable left to the button, and in onDraw to move the animatable in the center of the button. However, for a short period of time after the button is tapped, I do not know why there are 2 progress bars on the button.</p> <pre><code>public class ButtonWithProgressBar extends Button { protected int progressId = R.drawable.progress_bar; protected Drawable progress; protected CharSequence buttonText; @Override public void setText(CharSequence text, BufferType type) { super.setText(text, type); if (Strings.notEmpty(text)) { buttonText = text; } } public void startSpinning() { if(isSpinning()){ return; } progress = getContext().getResources().getDrawable(progressId); final Drawable[] old = getCompoundDrawables(); setCompoundDrawablesWithIntrinsicBounds(old[0], old[1], progress, old[3]); setEnabled(false); if(progress instanceof Animatable){ ((Animatable)progress).start(); } setText(""); } public void stopSpinning() { if(!isSpinning()){ return; } if(progress instanceof Animatable){ ((Animatable)progress).stop(); } setEnabled(true); setText(buttonText); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (progress != null) { final int drawableHeight = progress.getIntrinsicHeight(); final int drawableWidth = progress.getIntrinsicWidth(); final int drawableTop = (getHeight() - drawableHeight) / 2; final int drawableLeft = (getWidth() - drawableWidth) / 2; progress.setBounds(drawableLeft, drawableTop, drawableLeft + drawableWidth, drawableTop + drawableHeight); progress.draw(canvas); } } </code></pre> <p>}</p> <p>And this is displayed for a short period after tap, before everything looking as I want: <img src="https://i.stack.imgur.com/KDTvp.png" alt="enter image description here"></p> <p>Any ideas why this is happening?</p>
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    1. USMihaela Romanca
    1. USMihaela Romanca
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