如何解决绘制形状和文本需要单独的 Paint 对象
我有以下自定义可绘制对象,但我需要定义两个 Paint 对象来绘制文本和形状:
public class LetterovalDrawable
extends Drawable {
private final Paint textPaint;
private final Paint shapePaint;
private final Rect textRect;
private String letter;
public LetterovalDrawable() {
textPaint = new Paint();
shapePaint = new Paint();
textPaint.setAntiAlias(true);
shapePaint.setAntiAlias(true);
textPaint.setTextAlign(Paint.Align.LEFT);
textRect = new Rect();
}
public LetterovalDrawable(float textSize,@NonNull Typeface typeFace) {
textPaint = new Paint();
shapePaint = new Paint();
textPaint.setAntiAlias(true);
shapePaint.setAntiAlias(true);
textPaint.setTextAlign(Paint.Align.LEFT);
textRect = new Rect();
textPaint.setTextSize(textSize);
textPaint.setTypeface(typeFace);
}
@Override
public void draw(@NonNull Canvas canvas) {
int height = getBounds().height();
int width = getBounds().width();
RectF rect = new RectF(0.0f,0.0f,width,height);
canvas.drawRoundRect(rect,rect.bottom,rect.right,shapePaint);
if (letter == null) return;
textPaint.getTextBounds(letter,letter.length(),textRect);
float x = width / 2f - textRect.width() / 2f - textRect.left;
float y = height / 2f + textRect.height() / 2f - textRect.bottom;
canvas.drawText(letter,x,y,textPaint);
}
@Override
public void setAlpha(int alpha) {
textPaint.setAlpha(alpha);
shapePaint.setAlpha(alpha);
}
@Override
public void setColorFilter(@Nullable ColorFilter colorFilter) {
shapePaint.setColorFilter(colorFilter);
}
@Override
public int getopacity() {
return PixelFormat.TRANSLUCENT;
}
public void setLetter(String letter) {
if (letter == null || letter.length() < 1) {
this.letter = null;
return;
}
if (letter.length() == 1) this.letter = letter.toupperCase();
else this.letter = letter.substring(0,1).toupperCase();
}
}
我不喜欢必须定义两个绘画对象。是否可以重构这段代码,使其只有一个 Paint 对象?
或者在android中,是不是必须要有这两个对象?如果这是一个基本问题,请原谅我,我是 android 新手,我在文档中找不到任何内容。
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