如何在android中构建一个梯形形状？

Question

我该如何创建一个如下图所示的梯形形状？

我不想用图片或9.png。

Answer 1

试试这个：

<?xml version="1.0" encoding="utf-8"?> 
<vector xmlns:android="http://schemas.android.com/apk/res/android" 
    android:width="292dp" 
    android:height="172dp" 
    android:viewportWidth="292" 
    android:viewportHeight="172"> 

    <path 
     android:strokeWidth="1.5" 
     android:strokeMiterLimit="10" 
     android:pathData="M 27.046 96.615 L 16.416 150.396 L 271.534 150.396 L 186.495 22.836 L 37.676 22.836 L 27.046 86.615 Z" /> 

    <path 
     android:fillColor="#00ff00" 
     android:strokeWidth="1.5" 
     android:strokeMiterLimit="10" 
     android:pathData="M 16.046 20.615 L 13.416 150.396 L 271.534 150.396 L 186.495 22.836 L 37.676 22.836 L 16.046 23.615 Z " /> 
</vector> 

Answer 2

您可以尝试在代码或xml中制作LayerDrawable。做一个矩形和一个三角形 退房的开发者网站获取更多信息：http://developer.android.com/reference/android/graphics/drawable/LayerDrawable.html

Answer 3

这个类是一个View定义，并绘制一个梯形ShapeDrawable。因此，梯形，作为Drawable，也可用于背景。

package com.stackoverflow.questions.q25768037; 

import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Path; 
import android.graphics.drawable.ShapeDrawable; 
import android.graphics.drawable.shapes.PathShape; 
import android.util.AttributeSet; 
import android.view.View; 

public class TrapezoidView extends View { 

    private ShapeDrawable mTrapezoid; 

    public TrapezoidView(Context context, AttributeSet attrs) { 
     super(context, attrs); 

     Path path = new Path(); 
     path.moveTo(0.0f, 0.0f); 
     path.lineTo(100.0f, 0.0f); 
     path.lineTo(200.0f, 100.0f); 
     path.lineTo(0.0f, 100.0f); 
     path.lineTo(0.0f, 0.0f); 

     mTrapezoid = new ShapeDrawable(new PathShape(path, 200.0f, 100.0f)); 
     mTrapezoid.getPaint().setStyle(Paint.Style.FILL_AND_STROKE); 
     mTrapezoid.getPaint().setStrokeWidth(1.0f); 
     mTrapezoid.getPaint().setColor(Color.GREEN); 
    } 

    @Override 
    protected void onSizeChanged(int w, int h, int oldw, int oldh) { 
     mTrapezoid.setBounds(0, 0, w, h); 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     mTrapezoid.draw(canvas); 
    } 
}