Android如何以编程方式创建三角形和矩形形状? [英] Android how to create triangle and rectangle shape programmatically?

问题描述

如何创建如下所示的气球可绘制形状.我们可以在其中动态更改其颜色.

How can we create ballon drawable shape as below. where we can change the color of it dynamically.

推荐答案

在这里，对于triangle和rectangle，它是XML.将其保存在drawable文件夹中.

Here it is XML for triangle and rectangle. save it inside drawable folder.

triangle.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item >
        <rotate
            android:fromDegrees="45"
            android:toDegrees="45"
            android:pivotX="-40%"
            android:pivotY="87%" >
            <shape
                android:shape="rectangle"  >
                <stroke android:color="@android:color/transparent" android:width="10dp"/>
                <solid
                    android:color="#000000"  />
            </shape>
        </rotate>
    </item>
</layer-list>

rectangle.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item> 
    <shape android:shape="rectangle">
      <solid android:color="#B2E3FA" /> 
    </shape>
  </item>
</layer-list>

和布局以获取所需形状.

<RelativeLayout
        android:id="@+id/rlv1"
        android:layout_width="150dp"
        android:layout_height="50dp"
        android:background="@drawable/rectangle" />

    <RelativeLayout
        android:id="@+id/rlv2"
        android:layout_width="50dp"
        android:layout_height="50dp"  
        android:layout_below="@+id/rlv1"
        android:background="@drawable/triangle"
        android:rotation="180" />

根据需要设置边距.

来源

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