Place LinearLayout at bottom of another LinearLayout

Question

I am trying to place LinearLayout containing gridview at the bottom. Please suggest what can be done.

Below is my XML code :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:custom="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/parentRelativeView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/darkgreen"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/txtEquation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/darkorange"
        android:gravity="center"
        android:text="2+2=?"
        android:textColor="@color/white"
        android:textSize="40dp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/txtOutput"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/darkpurple"
        android:gravity="center"
        android:textColor="@color/white"
        android:textSize="28dp"
        android:textStyle="bold" />

    <com.github.lzyzsd.circleprogress.DonutProgress
        android:id="@+id/donut_progress"
        android:layout_width="wrap_content"
        android:layout_height="100dp"
        android:layout_below="@+id/txtOutput"
        android:layout_gravity="center"
        android:gravity="center"
        android:textColor="@color/white"
        custom:donut_finished_color="#30b8f2"
        custom:donut_progress="01"
        custom:donut_text_size="50dp" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:layout_weight="0"
        android:background="@color/white"
        android:baselineAligned="false">

        <GridView
            android:id="@+id/numberGridView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="0.4dp"
            android:background="@color/white"
            android:horizontalSpacing="0.4dp"
            android:numColumns="@integer/grid_rows"
            android:stretchMode="columnWidth"
            android:verticalSpacing="0.4dp" />
    </LinearLayout>
</LinearLayout>

Answer 1

There is no way you can align some items to top and others to bottom in LinearLayout . We have RelativeLayout for purposes like this. With RelativeLayout you can align anything to anything so I recommend you to use it.