Develop Reference

Dynamically adjust position of Button in Android Studio

I have a Button in Linear Layout when I see in the Design view of Activity xml ,it looks like it is perfectly positioned but when I see in GenyMotoin avd it is farly placed from what I expected.
How to dynamically adjust the position of button on different screen sizes?
My xml file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
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="com.xxx.MainScreen"
android:background="#b6b6b6">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<TextView
android:layout_width="match_parent"
android:layout_height="263dp"
android:id="#+id/textView"
android:textSize="50dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="264dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Next Act"
android:id="#+id/button"
android:layout_marginTop="100dp"
android:layout_marginLeft="20dp" />
</LinearLayout>
</RelativeLayout>

Use Linear Layout for the outermost layout.

It's not clear what your trying to achieve but If you want to position your views at the center on all devices. Try to use RelativeLayout instead of LinearLayout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#b6b6b6"
android:padding="#dimen/activity_vertical_margin"
android:weightSum="2"
android:orientation="vertical"
tools:context="com.offtogeek.motivatemyself.MainScreen">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal">
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:gravity="left"
android:textSize="50dp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_weight="1"
android:text="Next Quote" />
</RelativeLayout>
</LinearLayout>

LinearLayout Beneath LinearLayout full width?

I have an ImageView and a TextView that are the only items in my Android UI. Currently the TextView is in the same LinearLayout as the ImageView, so the text sometimes runs to 2 lines. I want to get the text on its own line, with the full width of the parent element so it will be the whole width of the screen. So far everything I've tried moves the ImageView outside the window or makes it very small.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:weightSum="4"
android:gravity="center"
tools:context=".MainActivity"
android:baselineAligned="false">
<LinearLayout
android:layout_width="0dp"
android:orientation="vertical"
android:layout_weight="2"
android:gravity="center_vertical"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/activity_main_imageview_gototags"
android:src="#drawable/img_main_gototags"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop"
android:onClick="imageViewGoToTagsOnClickOnClick"
android:adjustViewBounds="true"/>
<TextView
android:id="#+id/activity_main_textview_tagline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/activity_main_textview_tagline"
android:textColor="#color/dark_blue"
android:gravity="center"
android:textSize="30sp"
android:layout_gravity="center_horizontal" />
</LinearLayout>
</LinearLayout>

May be this is what you want
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
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" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" >
<ImageView
android:id="#+id/activity_main_imageview_gototags"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:onClick="imageViewGoToTagsOnClickOnClick"
android:scaleType="centerCrop"
android:src="#drawable/ic_launcher" />
</LinearLayout>
<View
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5" />
</LinearLayout>
<TextView
android:id="#+id/activity_main_textview_tagline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLines="1"
android:singleLine="true"
android:gravity="center"
android:text="lfhjdhkjfhkjdhkjfhkdhkjfhdkshfkhskahdfkjdhkhkjfhdk"
android:textColor="#android:color/holo_blue_bright"
android:textSize="30sp" />
</LinearLayout>
I hope it helps.let me know if it did not.

Don't give the parent(LinearLayout) of your ImageView a width of 0dp make it match_parent instead and the same for your TextView also there's a property on text views android:maxLines that corresponds to how many lines at max can it go to, set it to 1 and if you need truncation you can also use android:ellipsize on the text view.

vertical centering one view inside a LinearLayout with two views

i would like to force gauge to be centered vertically above llInner...
i just don't seem to be able
instead of llTop using all the available space it is llInner doing it.
thank you
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/llTop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:background="#ff0000">
<eu.sextante.speedlimit.Views.GaugeView
android:id="#+id/gauge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<LinearLayout
android:id="#+id/llInner"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_gravity="bottom|right"
android:gravity="bottom|right"
android:background="#00ff00">
<eu.sextante.speedlimit.Views.LimitView
android:id="#+id/limit"
android:layout_width="wrap_content"
android:layout_height="60dip"
android:background="#0000ff"
android:maxHeight="60dip"
android:maxWidth="60dip"/>
</LinearLayout>

You should use Relative Layout as main layout like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
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" >
<LinearLayout
android:id="#+id/llInner"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="bottom|right"
android:background="#00ff00"
android:gravity="bottom|right"
android:orientation="horizontal" >
<eu.sextante.speedlimit.Views.LimitView
android:id="#+id/limit"
android:layout_width="wrap_content"
android:layout_height="60dip"
android:background="#0000ff"
android:maxHeight="60dip"
android:maxWidth="60dip" />
</LinearLayout>
<your.gaugeview
android:id="#+id/gauge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="dfdg" />
</RelativeLayout>
Hope it helps you.

Android Relative Layout with sticky footer

I'm relatively new to Android development and I'm having a hard time putting together a certain interface. I've looked through many similar questions but none of them give me the answer i'm looking for.
I want to put together an XML interface like the following:
I want a LinearLayout that acts like a sticky footer that will contain two Buttons. This part will always align to the bottom and and will always be 60dp high. The RelativeLayout would then be on top of the footer, but it's height should scale depending on the screen size.
I've tried the following:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".DartboardActivity">
<RelativeLayout
android:id="#+id/game_layout"
android:layout_width="match_parent"
android:layout_height="506dp"
android:background="#drawable/background"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin">
<ImageView
android:id="#+id/Dartboard"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="#string/desc_dartboard"
android:src="#drawable/dartboard" />
<hhs.week3.dartboard.VerticalSeekBar
android:id="#+id/seekBarVertical"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_gravity="bottom"
android:thumb="#drawable/thumbhorizontal"
android:layout_marginBottom="40dp" />
<SeekBar
android:id="#+id/seekBarHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:thumb="#drawable/thumbhorizontal" />
</RelativeLayout>
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#333">
<Button
android:id="#+id/fire"
style="#style/button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:text="#string/fire" />
<Button
android:id="#+id/settings"
style="#style/button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:text="#string/settings" />
</LinearLayout>
</LinearLayout>
I got it working half decently, but it requires me to give the RelativeLayout bit a fixed height, making it look right on my phone, but not on others.
How do I best approach this?

Use the LinearLayout layout_weight mechanism to assign all remaining space to your RelativeLayout:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1"
... />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
... />
</LinearLayout>

Try following code
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".DartboardActivity" >
<RelativeLayout
android:id="#+id/game_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/buttons"
android:layout_alignParentTop="true"
android:background="#drawable/ic_launcher"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin" >
</RelativeLayout>
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:background="#333"
android:orientation="vertical" >
</LinearLayout>
</RelativeLayout>
I removed LinearLayout and replaced with RelativeLayout. This will allow you to set your LinearLayout stick to bottom.

I was able to achieve the same result by using below code. Basically, the parent layout is one Linear layout and the first child element is a scrollview so it can squeeze its content when the keyboard is shown. Also note the use of the android:layout_height="0dp" and android:layout_weight="1" used with the scrollview
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/wrap"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ScrollView
android:id="#+id/wrap2"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" >
<LinearLayout
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
</LinearLayout>
</ScrollView>
<FrameLayout
android:id="#+id/buttonsPanel"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#333" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="action buttons" />
</FrameLayout>
</LinearLayout>

Try this
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".DartboardActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:layout_weight="1"
android:background="#drawable/background"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin">
<ImageView
android:id="#+id/Dartboard"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:contentDescription="#string/desc_dartboard"
android:src="#drawable/dartboard"
android:adjustViewBounds="true"/>
<hhs.week3.dartboard.VerticalSeekBar
android:layout_marginTop="10dp"
android:id="#+id/seekBarVertical"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:thumb="#drawable/thumbhorizontal"/>
<SeekBar
android:id="#+id/seekBarHorizontal"
android:layout_width="match_parent"
android:layout_marginTop="10dp"
android:layout_height="wrap_content"
android:thumb="#drawable/thumbhorizontal" />
</LinearLayout>
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#333333">
<Button
android:id="#+id/fire"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:layout_weight="1"
android:text="#string/fire"/>
<Button
android:id="#+id/settings"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:layout_weight="1"
android:text="#string/settings"/>
</LinearLayout>
</LinearLayout>

Android ScrollView fillViewport not working

I have a simple layout with a name on the top, and a button which I want to be at the bottom of the screen, or beyond that in case I add more items.
So I am using a ScrollView with a LinearLayout as follows:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
android:fillViewport="true"
android:focusableInTouchMode="true"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
tools:context=".ItemDetailActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<!-- Name -->
<RelativeLayout
android:id="#+id/top_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top" >
<TextView
android:id="#+id/name_label"
style="#style/Header_Label_TextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/name" />
<TextView
android:id="#+id/name_value"
style="#style/Value_Label_TextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/name_label" />
</RelativeLayout>
<!-- button -->
<RelativeLayout
android:id="#+id/ButtonLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom" >
<Button
android:id="#+id/add_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:onClick="editItem"
android:text="#string/button_edit" />
</RelativeLayout>
<requestFocus />
</LinearLayout>
This is what I get:
How do I make it so that the button appears at the bottom of the screen or beyond. Upon searching online, most answers were to set the `android:fillViewport="true", but that is not helping. What am I doing wrong?

Change your Button layout like this:
<RelativeLayout
android:id="#+id/ButtonLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="bottom" >
<Button
android:id="#+id/add_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:onClick="editItem"
android:layout_alignParentBottom="true"
android:text="#string/button_edit" />
</RelativeLayout>

This should work -
Use Relative layout as a child for the scroll view .
Set layout_alignParentBottom = true for the Button.
Sample XML
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
android:fillViewport="true"
android:focusableInTouchMode="true"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
tools:context=".ItemDetailActivity" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<!-- Name -->
<RelativeLayout
android:id="#+id/top_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top" >
<TextView
android:id="#+id/name_label"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Name" />
<TextView
android:id="#+id/name_value"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/name_label" />
</RelativeLayout>
<!-- button -->
<RelativeLayout
android:id="#+id/ButtonLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
<Button
android:id="#+id/add_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:onClick="editItem"
android:text="Edit" />
</RelativeLayout>
</RelativeLayout>
</ScrollView>

In scroll view, use RelativeLayout instead of LinearLayout and set your bottom view property
android:layout_alignParentBottom="true"

If you're using LinearLayout (which is more performant than RelativeLayout), you should set android:gravity="bottom" & android:layout_height="match_parent" like this:
<LinearLayout
android:id="#+id/ButtonLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="bottom" >
<Button
android:id="#+id/add_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:onClick="editItem"
android:text="#string/button_edit" />
</LinearLayout>
Reference: https://demonuts.com/android-fillviewport/