Android自定义View之继承TextView绘制背景

  • Z时代
  • 2024-01-10
  • 分类：综合

本文实例为大家分享了TextView绘制背景的方法，供大家参考，具体内容如下

效果：

实现流程：

1.初始化：对画笔进行设置

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));

2.绘制外框，内框，文字

获取组件宽高

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

绘制

@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);
  }

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