GradientDrawable 可以用來通過程式方式給控制元件設定背景如圓角，邊框等
阿新 • • 發佈：2019-02-13
@SuppressLint("NewApi") public void setPopupStyle(final int backgroundColor, final int borderColor, final int borderWidthDP, float cornerRadiusDP, final int textColor) { final GradientDrawable popupbackground = new GradientDrawable(); popupbackground.setCornerRadius(cornerRadiusDP * density); popupbackground.setStroke((int) (borderWidthDP * density), borderColor); popupbackground.setColor(backgroundColor); if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) scrollIndicatorTextView.setBackgroundDrawable(popupbackground); else scrollIndicatorTextView.setBackground(popupbackground); scrollIndicatorTextView.setTextColor(textColor); }