Can I use layout_weight to position a RelativeLayout?

Question

I\'ve been trying all day to get this to work and i think that I can use RelativeLayout

android:layout_weight=\"0.3\"  

to pl

Answer 1

Since this xml file doesn't give error it doesn't mean that you can use these attributes (weight, orientation associated to LinearLayout) with RelativeLayout. Please see the documentation for RelativeLayout first.

Answer 2

Stack 2 LinearLayout (L1, L2) sections with weights of 0.3 and 0.7 (and heights of 0dp) inside a LinearLayout (L0) with vertical orientation and total weight of 1.0. Put your buttons in the 0.7 weighted layout (L2). That will give you your spacing of 30% above the buttons.

You can then place the containing LinearLayout (L0) inside a RelativeLayout (R0) and place L0 relative to the right of the parent (R0), which will position the entire thing on the right side of the screen.

Edit: My version is pretty much same as Milde in end, except using a root of RelativeLayout so I could put the layout_alignParentRight="true" to ensure it's flush to the right. The only sticking point I found was ensuring your first LinearLayout has height of fill_parent so that your spacer really is 30% of screen.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent">
    <LinearLayout android:orientation="vertical" android:layout_height="fill_parent" android:layout_width="wrap_content" android:weightSum="1.0" android:layout_alignParentRight="true">
        <LinearLayout android:layout_weight="0.3" android:layout_height="0dp" android:layout_width="0dp" />
        <LinearLayout android:layout_weight="0.7" android:layout_height="0dp" android:layout_width="wrap_content" android:orientation="vertical">
            <Button android:text="Button 1" android:layout_width="wrap_content" android:layout_height="wrap_content" />
            <Button android:text="Button 2" android:layout_width="wrap_content" android:layout_height="wrap_content" />
            <Button android:text="Button 3" android:layout_width="wrap_content" android:layout_height="wrap_content" />
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

Answer 3

Try this:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rightLinerLayoutL0"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    >
    <LinearLayout android:id="@+id/rightLinerLayoutL1" android:layout_weight="0.3" android:layout_width="fill_parent">
    </LinearLayout>
    <LinearLayout android:orientation="vertical" android:id="@+id/rightLinerLayoutL2" android:layout_weight="0.7" android:layout_width="fill_parent">
        <Button android:text="Button_A" android:layout_height="wrap_content" android:id="@+id/btn_A" android:layout_width="wrap_content" android:layout_gravity="right"></Button>
        <Button android:text="Button_B" android:layout_height="wrap_content" android:id="@+id/btn_B" android:layout_width="wrap_content" android:layout_gravity="right"></Button>
        <Button android:text="Button_C" android:layout_height="wrap_content" android:id="@+id/btn_C" android:layout_width="wrap_content" android:layout_gravity="right"></Button>
    </LinearLayout>
</LinearLayout >