SeekBarCompat.java 文件源码

/***
 * Enables or disables the whole seekBar!
 *
 * @param enabled
 */
@Override
public void setEnabled(final boolean enabled) {
    mIsEnabled = enabled;
    triggerMethodOnceViewIsDisplayed(this, new Callable<Void>() {
        @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
        @Override
        public Void call() throws Exception {
            if (!lollipopAndAbove()) {
                gradientDrawable = new GradientDrawable();
                gradientDrawable.setShape(GradientDrawable.OVAL);
                gradientDrawable.setSize(mOriginalThumbHeight / 3, mOriginalThumbHeight / 3);
                gradientDrawable.setColor(mIsEnabled ? mThumbColor : Color.LTGRAY);
                gradientDrawable.setDither(true);
                gradientDrawable.setAlpha(mThumbAlpha);
                setThumb(gradientDrawable);
                //load up the drawable and apply color
                LayerDrawable ld = (LayerDrawable) getProgressDrawable();
                ScaleDrawable shape = (ScaleDrawable) (ld.findDrawableByLayerId(android.R.id.progress));
                shape.setColorFilter(mIsEnabled ? mProgressColor : Color.LTGRAY, PorterDuff.Mode.SRC_IN);
                //set the background to transparent
                NinePatchDrawable ninePatchDrawable = (NinePatchDrawable) (ld.findDrawableByLayerId(android.R.id.background));
                ninePatchDrawable.setColorFilter(Color.TRANSPARENT, PorterDuff.Mode.SRC_IN);
                //background
                //load up the drawable and apply color
                SeekBarBackgroundDrawable seekBarBackgroundDrawable = new SeekBarBackgroundDrawable(getContext(),
                        mIsEnabled ? mProgressBackgroundColor : Color.LTGRAY, mActualBackgroundColor, getPaddingLeft(), getPaddingRight());
                if (belowJellybean())
                    setBackgroundDrawable(seekBarBackgroundDrawable);
                else
                    setBackground(seekBarBackgroundDrawable);
            }
            SeekBarCompat.super.setEnabled(enabled);
            return null;
        }
    });

}