自定义View画八卦图

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package com.example.a03_gossip.gossipview;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.view.View;/** * Created by yujie on 2017/11/30. */public class DrawView extends View{    public DrawView(Context context) {        super(context);    }    public DrawView(Context context, @Nullable AttributeSet attrs) {        super(context, attrs);    }    public DrawView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        Paint paint = new Paint();        paint.setAntiAlias(true);        paint.setStrokeWidth(5);        paint.setStyle(Paint.Style.FILL);        RectF leftRectF = new RectF(100, 100, 500, 500);        paint.setColor(Color.WHITE);        canvas.drawArc(leftRectF, 90, 180, false, paint);        paint.setStyle(Paint.Style.STROKE);        paint.setColor(Color.BLACK);        canvas.drawArc(leftRectF, 90, 180, false, paint);        paint.setColor(Color.BLACK);        paint.setStyle(Paint.Style.FILL_AND_STROKE);        RectF rightRectF = new RectF(100, 100, 500, 500);        canvas.drawArc(rightRectF, -90, 180, false, paint);        RectF upRectF = new RectF(200, 100, 400, 300);        canvas.drawArc(upRectF, 90, 180, false, paint);        paint.setColor(Color.WHITE);        RectF downRectF = new RectF(200, 300, 400, 500);        canvas.drawArc(downRectF, -90, 180, false, paint);        paint.setColor(Color.BLACK);        paint.setStyle(Paint.Style.STROKE);        canvas.drawArc(downRectF, -90, 180, false, paint);        paint.setStyle(Paint.Style.FILL);        paint.setColor(Color.WHITE);        canvas.drawCircle(300, 200, 20, paint);        paint.setColor(Color.BLACK);        canvas.drawCircle(300, 400, 20, paint);    }}
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