Android自定义View之继承TextView绘制背景

mPaintIn = new Paint();
mPaintIn.setAntiAlias(true);
mPaintIn.setDither(true);
mPaintIn.setStyle(Paint.Style.FILL);    

mPaintIn.setColor(getResources().getColor(R.color.colorPrimary));

mPaintOut = new Paint();
mPaintOut.setAntiAlias(true);
mPaintOut.setDither(true);
mPaintOut.setStyle(Paint.Style.FILL);   

mPaintOut.setColor(getResources().getColor(R.color.colorAccent));

int width = getMeasureWidth();
int height = getMeasureHeight();

@Override
  protected void onDraw(Canvas canvas) {
    //绘制背景,在绘制文字之前绘制
    canvas.drawRect(new Rect(0, 0, getMeasuredWidth(), getMeasuredHeight()), mPaintIn);
    canvas.drawRect(new Rect(10, 10, getMeasuredWidth()-10, getMeasuredHeight()-10), mPaintOut);

    super.onDraw(canvas);
  }