本文整理匯總了Java中android.graphics.drawable.ShapeDrawable.setAlpha方法的典型用法代碼示例。如果您正苦於以下問題：Java ShapeDrawable.setAlpha方法的具體用法？Java ShapeDrawable.setAlpha怎麽用？Java ShapeDrawable.setAlpha使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類android.graphics.drawable.ShapeDrawable的用法示例。
在下文中一共展示了ShapeDrawable.setAlpha方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: setBadge
import android.graphics.drawable.ShapeDrawable; //導入方法依賴的package包/類
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
public void setBadge(String text) {
TextPaint textPaint = mTvBadge.getPaint();
float textWidth = textPaint.measureText(text);
Paint.FontMetrics fontMetrics = textPaint.getFontMetrics();
float textHeight = fontMetrics.bottom - fontMetrics.top;
int width = (int) Math.max(textWidth, textHeight);
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) mTvBadge.getLayoutParams();
params.width = width;
params.height = width;
mTvBadge.setLayoutParams(params);
mTvBadge.setTextAlignment(View.TEXT_ALIGNMENT_CENTER);
int radius = width / 2;
RoundRectShape shape = new RoundRectShape(new float[] {radius, radius, radius, radius, radius, radius, radius, radius}, null, null);
ShapeDrawable backgroundDrawable = new ShapeDrawable(shape);
backgroundDrawable.getPaint().setColor(Color.parseColor("#ff0000"));
backgroundDrawable.setAlpha(100);
mTvBadge.setBackground(backgroundDrawable);
mTvBadge.setText(text);
}