1 問題

Canvas的drawRoundRect()函數怎么用

public void drawRoundRect(RectF rect, float rx, float ry, Paint paint)

功能：該方法用于在畫布上繪制圓角矩形，通過指定RectF對象以及圓角半徑來實現。float rx：生成圓角的橢圓的X軸半徑
float ry：生成圓角的橢圓的Y軸半徑

 

 

 

 

 

 

 

 

 

2 代碼實現

 TestView.java文件如下

package com.onemt.sdk.circle;import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;import androidx.annotation.NonNull;
import androidx.annotation.Nullable;public class TestView extends View {private Paint mPaint;private RectF rectf;public TestView(@NonNull Context context) {super(context);init();}public TestView(@NonNull Context context, @