android textview 底部圆角,如何实现textview右下角角标变成圆角呢

private Bitmap roundBitmapByXfermode(Bitmap bitmap, int outWidth, int outHeight, int radius) {

if(bitmap == null) {

throw new NullPointerException("Bitmap can't be null");

}

// 等比例缩放拉伸

float widthScale = outWidth * 1.0f / bitmap.getWidth();

float heightScale = outHeight * 1.0f / bitmap.getHeight();

Matrix matrix = new Matrix();

matrix.setScale(widthScale, heightScale);

Bitmap newBt = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);

// 初始化目标bitmap

Bitmap targetBitmap = Bitmap.createBitmap(outWidth, outHeight, Bitmap.Config.ARGB_8888);

Canvas canvas = new Canvas(targetBitmap);

canvas.drawARGB(0, 0, 0, 0);

Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);

// 利用画笔绘制底部圆角

canvas.drawRoundRect(new RectF(0, outHeight - 2 * radius, outWidth, outHeight), radius, radius, paint);

// 利用画笔绘制左侧矩形

canvas.drawRect(new RectF(0, 0, radius, outHeight), paint);

// 利用画笔绘制顶部上面直角部分

canvas.drawRect(new RectF(0, 0, outWidth, outHeight - radius), paint);

// 设置叠加模式

paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));

// 在画布上绘制原图片

Rect ret = new Rect(0, 0, outWidth, outHeight);

canvas.drawBitmap(newBt, ret, ret, paint);

bitmap.recycle();

newBt.recycle();

return targetBitmap;

}

谢谢大家的回答我也写了一个方法，目前已经实现效果，

当 isSelect = false， 圆角矩形 没有显示出来效果，大家知道原因吗