ClipDrawableProgressBar.java 文件源码

/**
 * Create the progress bar with a custom height.
 * @param context An Android context.
 * @param height The height in px of the progress bar.
 */
public ClipDrawableProgressBar(Context context, int height) {
    super(context);

    mDesiredVisibility = getVisibility();

    int foregroundColor =
            ApiCompatibilityUtils.getColor(getResources(), R.color.progress_bar_foreground);
    mBackgroundColor =
            ApiCompatibilityUtils.getColor(getResources(), R.color.progress_bar_background);

    mForegroundDrawable = new ColorDrawable(foregroundColor);
    setImageDrawable(
            new ClipDrawable(mForegroundDrawable, Gravity.START, ClipDrawable.HORIZONTAL));
    setBackgroundColor(mBackgroundColor);

    setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, height));
}