android - 为绘画设置 TextSize

Question

我正在研究为我的 textPaint 动态设置文本大小的选项。我希望设置 textSize 值逐渐增加直到到达屏幕中心并逐渐减小直到屏幕底部。

<H5>1</H5>
<H4>2</H4>
<H3>3</H3>
<H2>4</H2>
<H1>5</H1>
<H2>6</H2>
<H3>7</H3>
<H4>8</H4>
<H5>9</H5>

截至目前，我将文本大小设置为默认值。我想在我的 onDraw() 方法中动态设置这个

有什么方法可以实现吗？

更新:我尝试在 onDraw() 方法中设置绘画，而不是如下共享的构造函数

Rect bounds = getBounds();
    float textX, textY;
    float pivotX, pivotY;

    Log.d("TAG", "canvas center point "+ canvas.getWidth() / 2 +", "+ canvas.getHeight() / 2);
    Log.d("TAG", "Bounds Center Point "+ bounds.centerX() + ", "+bounds.centerY());

    StaticLayout mTextLayout = new StaticLayout(text, paint, bounds.width() + 75, Layout.Alignment.ALIGN_CENTER, 1.0f, 1.0f, false);
    canvas.save();

    if (paint.getTextAlign() == Paint.Align.LEFT) {
        textX = bounds.centerX() + 50;
        textY = bounds.centerY() + 8;

    }
    else if (paint.getTextAlign() == Paint.Align.RIGHT) {
        textX = bounds.centerX() - 100;
        textY = bounds.centerY() + 10;
    }
    else
    {
        textX = bounds.centerX() + 8;
        textY = bounds.centerY() + 8;
     }

    canvas.translate( textX, textY - mTextLayout.getHeight() / 2);
    paint.setTextSize((bounds.centerY()) / 10); //Setting text size dynamically
     mTextLayout.draw(canvas);
    canvas.restore();

Answer 1

像这样写一个设置文字大小的方法

public void setTextSize(int size){
  this.textSize=size;
  invalidate();
}

使用onDraw()中存储的变量设置要绘制的文字大小

@Override
   protected void onDraw(Canvas canvas) {
      yourPaint.setTextSize(textSize);
      //...
   }