android textview聚焦后边框发光效果

Question

重写textview
@Override  
    protected void onDraw(Canvas canvas) {  
        Log.d("lg", "onDraw");  
        super.onDraw(canvas);  
  
        // 画边框  
        Rect rect1 = getRect(canvas);  
        Paint paint = new Paint();  
        paint.setColor(Color.GRAY);  
        paint.setStyle(Paint.Style.STROKE);  
  
        // 画边框  
        canvas.drawRect(rect1, paint);  
          
        paint.setColor(Color.LTGRAY);  
  
        // 画一条竖线,模拟右边的阴影  
        canvas.drawLine(rect1.right + 1, rect1.top + 2, rect1.right + 1,  
                rect1.bottom + 2, paint);  
        // 画一条横线,模拟下边的阴影  
        canvas.drawLine(rect1.left + 2, rect1.bottom + 1, rect1.right + 2,  
                rect1.bottom + 1, paint);  
          
        // 画一条竖线,模拟右边的阴影  
        canvas.drawLine(rect1.right + 2, rect1.top + 3, rect1.right + 2,  
                rect1.bottom + 3, paint);  
        // 画一条横线,模拟下边的阴影  
        canvas.drawLine(rect1.left + 3, rect1.bottom + 2, rect1.right + 3,  
                rect1.bottom + 2, paint);  
    }  

Answer 1

Rect getRect(Canvas canvas) {
Rect rect = canvas.getClipBounds();
rect.bottom -= getPaddingBottom();
rect.right -= getPaddingRight();
rect.left += getPaddingLeft();
rect.top += getPaddingTop();
return rect;
}