Android how to create triangle and rectangle shape programmatically?

Question

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

Answer 1

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>

and layout for shape you require.

<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" />

set margin according you required.

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