Create a shape in drawable folder like

<shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle">
  <corners
    android:radius="10dip"/>
  <solid
    android:color="#F00" />
  <stroke
    android:width="2dip"
    android:color="#FFF" />
  <padding
    android:left="5dip"
    android:right="5dip"
    android:top="5dip"
    android:bottom="5dip" />
</shape>

Now create a Text view in your xml file and set its background to the above shape created.

<TextView
  android:layout&#95;width="wrap&#95;content"
  android:layout&#95;height="wrap&#95;content" 
  android:text="10"
  android:textColor="#FFF"
  android:textSize="16sp"
  android:textStyle="bold"
  android:background="@drawable/badge&#95;circle"/>

This will give the effect of text view with red color background now set this to the corner of any view like button or text etc.

EX.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout&#95;width="wrap&#95;content"
  android:layout&#95;height="wrap&#95;content">
  <Button
    android:id="@+id/myButton"
    android:layout&#95;width="65dip"
    android:layout&#95;height="65dip"/>
  <TextView
    android:id="@+id/textOne"
    android:layout&#95;width="wrap&#95;content"
    android:layout&#95;height="wrap&#95;content"
    android:layout&#95;alignTop="@id/myButton"
    android:layout&#95;alignRight="@id/myButton" 
    android:text="10"
    android:textColor="#FFF"
    android:textSize="16sp"
    android:textStyle="bold"
    android:background="@drawable/badge&#95;circle"/>
</RelativeLayout>

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