I try to make a rouned EditText.It display well in the Graphical layout in main.xml. But it is still square when i launch the AVD.Here is the code:

<EditText
        android:id="@+id/et"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:hint="Enter a #hashtag or keyword"
        android:textColor="#000000"
        android:drawableLeft="@drawable/magnifier"
        android:background="@drawable/rounded_edittext"
        android:textSize="16dp" >
        <requestFocus />
    </EditText>
<!-- res/drawable/rounded_edittext.xml -->     <shape xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="10dp"
android:shape="rectangle" >
<solid android:color="#FFFFFF" />
<corners
    android:bottomLeftRadius="15dp"
    android:bottomRightRadius="15dp"
    android:topLeftRadius="15dp"
    android:topRightRadius="15dp" />

This a rounded edit text that change also behavour on clik states, Simply use thes xml

<?xml version="1.0" encoding="utf-8"?>
<!-- res/drawable/rounded_edittext_states.xml -->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item
     android:state_pressed="true"
     android:state_enabled="true"
        android:drawable="@drawable/rounded_focused" />
    <item
     android:state_focused="true"
     android:state_enabled="true"
        android:drawable="@drawable/rounded_focused" />
    <item
     android:state_enabled="true"
        android:drawable="@drawable/rounded_edittext" />
</selector>

Normal rounded edittext:

<?xml version="1.0" encoding="utf-8"?>
<!--  res/drawable/rounded_edittext.xml -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" android:padding="10dp">
 <solid android:color="#FFFFFF"/>
    <corners
     android:bottomRightRadius="15dp"
     android:bottomLeftRadius="15dp"
  android:topLeftRadius="15dp"
  android:topRightRadius="15dp"/>
</shape>

Pressed,Focused edittext

<?xml version="1.0" encoding="utf-8"?>
<!-- res/drawable/rounded_edittext_focused.xml -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" android:padding="10dp">
 <solid android:color="#FFFFFF"/>
 <stroke android:width="2dp" android:color="#FF0000" />
    <corners
     android:bottomRightRadius="15dp"
     android:bottomLeftRadius="15dp"
  android:topLeftRadius="15dp"
  android:topRightRadius="15dp"/>
</shape>

And... now, the EditText should look like:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
<EditText
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    android:background="@drawable/rounded_edittext_states"
    android:padding="5dip"/>
</LinearLayout>

i used this layout to test it for and it works for me even with multiple round edittext:

this is the layout i use

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/et"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:background="@drawable/rounded_edittext"
        android:drawableLeft="@drawable/ic_launcher"
        android:hint="Enter a Login"
        android:textColor="#000000"
        android:textSize="16dp"
        android:padding="5dp">
        <requestFocus />
        </EditText>

        <EditText
            android:id="@+id/et2"
            android:layout_width="300dp"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_below="@+id/et"
            android:layout_marginTop="14dp"
            android:background="@drawable/rounded_edittext"
            android:drawableLeft="@drawable/ic_launcher"
            android:ems="10"
            android:hint="Enter a Password"
            android:padding="5dp"
            android:textColor="#000000"
            android:textSize="16dp" />

</RelativeLayout>

and this is a screen capture of the result on emulator: