Android自定義View之繼承TextView繪制背景

本文實例為大家分享了TextView繪制背景的方法，供大家參考，具體內容如下

效果：

實現流程：

1.初始化：對畫筆進行設置

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.繪制外框，內框，文字

獲取組件寬高

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

繪制

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

    super.onDraw(canvas);
  }

以上就是本文的全部內容，希望能給大家一個參考，也希望大家多多支持本站。