如何在android中创建六边形列表视图答案

【问题标题】：How to create hexagon listview in android如何在android中创建六边形列表视图
【发布时间】：2017-01-02 09:37:55
【问题描述】：

我正在寻找像这样创建六边形列表视图。

【问题讨论】：

参考this。也许这会对你有所帮助

【解决方案1】：

您可以在子布局中使用此六边形图像视图并调整边距

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.Region;
import android.util.AttributeSet;
import android.widget.ImageView;

public class HexagonMaskView extends ImageView {
    private Path hexagonPath;
    private Path hexagonBorderPath;
    private Paint mBorderPaint;

    public HexagonMaskView(Context context) {
        super(context);
        init();
    }

    public HexagonMaskView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public HexagonMaskView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        this.hexagonPath = new Path();
        this.hexagonBorderPath = new Path();

        this.mBorderPaint = new Paint();
        this.mBorderPaint.setColor(Color.WHITE);
        this.mBorderPaint.setStrokeCap(Paint.Cap.ROUND);
        this.mBorderPaint.setStrokeWidth(50f);
        this.mBorderPaint.setStyle(Paint.Style.STROKE);
    }

    public void setRadius(float radius) {
        calculatePath(radius);
    }

    public void setBorderColor(int color) {
        this.mBorderPaint.setColor(color);
        invalidate();
    }

    private void calculatePath(float radius) {
        float halfRadius = radius / 2f;
        float triangleHeight = (float) (Math.sqrt(3.0) * halfRadius);
        float centerX = getMeasuredWidth() / 2f;
        float centerY = getMeasuredHeight() / 2f;

        this.hexagonPath.reset();
        this.hexagonPath.moveTo(centerX, centerY + radius);
        this.hexagonPath.lineTo(centerX - triangleHeight, centerY + halfRadius);
        this.hexagonPath.lineTo(centerX - triangleHeight, centerY - halfRadius);
        this.hexagonPath.lineTo(centerX, centerY - radius);
        this.hexagonPath.lineTo(centerX + triangleHeight, centerY - halfRadius);
        this.hexagonPath.lineTo(centerX + triangleHeight, centerY + halfRadius);
        this.hexagonPath.close();

        float radiusBorder = radius - 5f;
        float halfRadiusBorder = radiusBorder / 2f;
        float triangleBorderHeight = (float) (Math.sqrt(3.0) * halfRadiusBorder);

        this.hexagonBorderPath.reset();
        this.hexagonBorderPath.moveTo(centerX, centerY + radiusBorder);
        this.hexagonBorderPath.lineTo(centerX - triangleBorderHeight, centerY + halfRadiusBorder);
        this.hexagonBorderPath.lineTo(centerX - triangleBorderHeight, centerY - halfRadiusBorder);
        this.hexagonBorderPath.lineTo(centerX, centerY - radiusBorder);
        this.hexagonBorderPath.lineTo(centerX + triangleBorderHeight, centerY - halfRadiusBorder);
        this.hexagonBorderPath.lineTo(centerX + triangleBorderHeight, centerY + halfRadiusBorder);
        this.hexagonBorderPath.close();
        invalidate();
    }

    @Override
    public void onDraw(Canvas c) {
        c.drawPath(hexagonBorderPath, mBorderPaint);
        c.clipPath(hexagonPath, Region.Op.INTERSECT);
        c.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
        super.onDraw(c);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);
        setMeasuredDimension(width, height);
        calculatePath(Math.min(width / 2f, height / 2f) - 10f);
    }
}

在xml中

  <YourpakageName.HexagonMaskView
    android:id="@+id/image"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:src="@drawable/bear"
    android:background="@android:color/holo_green_light"/>

希望对你有帮助

【讨论】：

this for imageview stackoverflow.com/questions/22601400/…
是的，他可以将该图像视图用于列表子视图，并根据奇数位置添加一些边距（正数和负数）
我明白了。但是用户问How to create hexagon listview
列表视图怎么可以是六边形的？它可以是水平的或垂直的，我猜他在他的问题中提到了图像视图
@Indeed Indeed。那么问题陈述是面向错误的

【解决方案2】：

嘿，请使用矢量图像：-

<vector android:height="24dp"
android:viewportHeight="628.0"
android:viewportWidth="726.0"
android:width="27dp"
xmlns:android="http://schemas.android.com/apk/res/android">
<path
    android:fillColor="#00ffffff"
    android:pathData="m723,314c-60,103.9 -120,207.8 -180,311.8 -120,0 -240,0 -360,0C123,521.8 63,417.9 3,314 63,210.1 123,106.2 183,2.2c120,0 240,0 360,0C603,106.2 663,210.1 723,314Z"
    android:strokeColor="#000000"
    android:strokeWidth="4" />

希望得到帮助。祝你编码愉快。

【讨论】：