Android : Show time in message blocks

I have message blocks.I want to show time right bottom of the message.This is my xml:

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


<LinearLayout
    android:id="@+id/blocks"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/mes7"
    android:layout_marginRight="6dp"
    android:layout_marginLeft="6dp"
    android:clickable="false">
<TextView
    android:id="@+id/messageBar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="left"
    android:layout_marginLeft="4dp"
    android:layout_marginRight="6dp"
    android:gravity="left"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:paddingTop="1dp"
    android:text="Test Message"
    android:typeface="sans"
    android:textSize="14sp"/>

<TextView 
    android:id="@+id/date"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="right|bottom"
    android:layout_marginRight="5dp"
    android:text="19:40"
    android:textSize="10sp"/>
</LinearLayout>
</LinearLayout>

I have no problem with short messages but when message prolonged date is not showing.Here you can see:

And one more thing:I want to do margin from left edge but I can't.

How can I do these ?