LinearLayout layout_gravity bottom issue

Question

There is my code :

<LinearLayout xmlns:tools="http://schemas.android.com/tools"   
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg_home"
android:orientation="vertical"
tools:context=".HomeActivity" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="0.30"
    android:gravity="center" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="0.70"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/llayBtnUp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center" >

        <ImageView
            android:id="@+id/btntest"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/fa" />

        <ImageView
            android:id="@+id/btntest1"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/fas" />

        <ImageView
            android:id="@+id/btntest2"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/fas" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/llayBtnDown"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center" >

        <ImageView
            android:id="@+id/btntest3"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/fas" />

        <ImageView
            android:id="@+id/btntest4"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/fa" />

        <ImageView
            android:id="@+id/tset5"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/fsa" />
    </LinearLayout>
    <LinearLayout 
        android:orientation="horizontal"
        android:id"@+id/llBot" 
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:layout_gravity="bottom" >

        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Button" />

    </LinearLayout>
</LinearLayout>

</LinearLayout>

What I want is that the last LinearLayout (with the id "llBot") touch the bottom of his parent.

So I've tried :

android:layout_gravity="bottom"

But still; it has no effect. My LinearLayout still touch the previous Linearlayout.

Thx !

Answer 1

Try out below layout code i have done relevant changes:

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
    android:orientation="vertical" >
<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="0dp"
    android:layout_weight="0.30"
    android:gravity="center" />
<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="0dp"
    android:layout_weight="0.70"
    android:orientation="vertical" >
    <LinearLayout
        android:id="@+id/llayBtnUp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center" >
        <ImageView
            android:id="@+id/btntest"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/ic_launcher" />
        <ImageView
            android:id="@+id/btntest1"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/buttonred" />
        <ImageView
            android:id="@+id/btntest2"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/border" />
    </LinearLayout>
    <LinearLayout
        android:id="@+id/llayBtnDown"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center" >
        <ImageView
            android:id="@+id/btntest3"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/download" />
        <ImageView
            android:id="@+id/btntest4"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/buttonred" />
        <ImageView
            android:id="@+id/tset5"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_margin="10dp"
            android:src="@drawable/ic_launcher" />
    </LinearLayout>        
   </LinearLayout>
    <LinearLayout
        android:id="@+id/test"
        android:layout_width="fill_parent"
        android:layout_height="100dp"
        android:orientation="horizontal"

        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:text="Button" />
    </LinearLayout>
 </LinearLayout>