session-android/res/layout/prompt_passphrase_activity.xml

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:fillViewport="true"
            android:background="@drawable/background_pattern_repeat">

    <FrameLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center" >
        
        <LinearLayout android:id="@+id/prompt_layout"
                      android:paddingRight="16dip"
                      android:paddingLeft="16dip"
                      android:paddingTop="10dip"
                      android:layout_width="fill_parent"
                      android:layout_height="wrap_content"
                      android:layout_gravity="center"
                      android:orientation="vertical">
                
            <ImageView android:layout_width="wrap_content"
                       android:layout_height="wrap_content"
                       android:layout_gravity="center"
                       android:layout_marginBottom="30dip"
                       android:src="@drawable/padlock_prompt"/>
        
            <TextView style="@style/Registration.Label"
                      android:layout_width="fill_parent"
                      android:textAllCaps="true"
                      android:text="@string/prompt_passphrase_activity__textsecure_passphrase" />
            
            <EditText android:id="@+id/passphrase_edit"
                      android:layout_width="fill_parent"
                      android:layout_height="wrap_content"
                      android:inputType="textPassword"
                      android:layout_marginBottom="10dip"
                      android:singleLine="true"/>                                    
            
            <LinearLayout android:orientation="horizontal"
                          android:gravity="right"
                          android:layout_width="fill_parent"
                          android:layout_height="wrap_content"
                          android:layout_marginTop="20dip"
                          android:layout_marginRight="20dip">
                
                <Button style="@android:style/Widget.Button"
                        android:id="@+id/ok_button"
                        android:text="@string/prompt_passphrase_activity__unlock"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="right"
                        android:textAppearance="?android:attr/textAppearanceMedium"/>                
            </LinearLayout>
        </LinearLayout>        
    </FrameLayout>
</ScrollView>