Develop Reference

How to make Android xml Linerlayout at the bottom of the activity in Android Studio?

How do I make LinearLayout in Android Studio at the bottom of the page. The result from the code below
I want the highlighted darken layout to be at the bottom of the page.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainPage"
android:orientation="vertical"
android:background="#ffffff">
<Button
android:id="#+id/taptoscan"
android:layout_marginTop="40dp"
android:layout_marginBottom="10dp"
android:layout_width="120dp"
android:layout_height="120dp"
android:background="#drawable/barcode"
android:layout_gravity="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tap to Scan"
android:fontFamily="#font/antic"
android:layout_gravity="center"
android:textSize="18sp"/>
<!--here is the layout i want to put at the bottom of the page-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#color/colorPrimaryDark"
android:orientation="horizontal"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:gravity="bottom">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</RelativeLayout>
</LinearLayout>
In the above code I tried the below and did not worked.
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:gravity="bottom"

You can use RelativeLayout at the outside. Something like this, and then ADD new one LinearLayout after that.
<?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:background="#ffffff"
android:orientation="vertical"
tools:context=".MainPage">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<Button
android:id="#+id/taptoscan"
android:layout_width="120dp"
android:layout_height="120dp"
android:layout_gravity="center"
android:layout_marginTop="40dp"
android:layout_marginBottom="10dp"
android:background="#drawable/barcode" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="#font/antic"
android:text="Tap to Scan"
android:textSize="18sp" />
</LinearLayout>
<!--here is the layout i want to put at the bottom of the page-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:background="#color/colorPrimaryDark"
android:gravity="bottom"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>

Use Frame Layout as base layout to do it in the best way, it's gonna work definitely
Just use layout_gravity="bottom" in the LinearLayout which you want at bottom and
Just like this :
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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="#ffffff"
android:orientation="vertical"
tools:context=".MainPage">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<Button
android:id="#+id/taptoscan"
android:layout_width="120dp"
android:layout_height="120dp"
android:layout_gravity="center"
android:layout_marginTop="40dp"
android:layout_marginBottom="10dp"
android:background="#drawable/barcode" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="#font/antic"
android:text="Tap to Scan"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_gravity="bottom"
android:background="#color/colorPrimaryDark"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</FrameLayout>

The approach below would help you achieve your design specifications with zero overlappings. Basically, there are four key steps:
Change your root layout to a RelativeLayout.
Inside the RelativeLayout, add a LinearLayout that would contain your Button and your TextView.
Inside the same RelativeLayout, add the LinearLayout that you intend to pin to the bottom of the screen.
Make sure yoU set the first LinearLayout on top of the second by using the android:layout_above="" attribute.
Now, here's the code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainPage">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#ffffff"
android:layout_above="#+id/bottomView">
<Button
android:id="#+id/taptoscan"
android:layout_marginTop="40dp"
android:layout_marginBottom="10dp"
android:layout_width="120dp"
android:layout_height="120dp"
android:background="#drawable/barcode"
android:layout_gravity="center"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tap to Scan"
android:fontFamily="#font/antic"
android:layout_gravity="center"
android:textSize="18sp"/>
</LinearLayout>
<!--here is the layout i want to put at the bottom of the page-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:id="#+id/bottomView"
android:background="#color/colorPrimaryDark"
android:orientation="horizontal"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:gravity="bottom">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
I hope this helps.

ScrollView with LinearLayout child does not wrap_content correctly

So, I have the following .xml:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.scopesystems.cityalert.ui.Despre"
tools:showIn="#layout/app_bar_despre"
android:background="#drawable/toolbar_incercare">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:id="#+id/linear_parent">
<RelativeLayout
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="0.1" />
<RelativeLayout
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="2.8" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<!--General-->
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="#style/sectionHeader"
android:text="#string/general"
/>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/despre_general"/>
<!--Evaluti-ne-->
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="#style/sectionHeader"
android:text="#string/evaluatine"
/>
<!--Confidentialitate si licente-->
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="#style/sectionHeader"
android:text="#string/confidentialitate"
/>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/despre_politici"/>
</LinearLayout>
</RelativeLayout>
<RelativeLayout
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="0.1" />
</LinearLayout>
</ScrollView>
The issue is that the last ListView is on only 1 row, and it has to be scrolled to display all the items in the list. I tried to add to the linear_parent a height of match_parent but it wont let me, it says that I should use instead wrapcontent. How can i change the layout to display the items on all the screen, not just half?

In this case, On the ScrollView use android:fillViewport="true" and for child of ScrollView android:height="wrap_content".

ScrollView with weight not working for me

I have a parent linearlayout with two scrollview inside it and I am using weight attribute inside scroll vies but this is not working for me I mean it's not providing any scrolling. Here is the code, how can I make it work?
LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="2">
<ScrollView
android:layout_width="0dp"
android:layout_height="match_parent"
android:scrollbars="horizontal"
android:fillViewport="true"
android:layout_weight="1"
android:layout_marginRight="8dp">
<LinearLayout
android:id="#+id/linearLayoutSizes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="#dimen/product_detail_items_margin_left"
>
</LinearLayout>
</ScrollView>
<ScrollView
android:layout_width="0dp"
android:layout_height="match_parent"
android:scrollbars="horizontal"
android:fillViewport="true"
android:layout_weight="1"
android:layout_marginLeft="8dp">
<LinearLayout
android:id="#+id/linearLayoutColors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioGroup
android:id="#+id/colorsGroup"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</RadioGroup>
</LinearLayout>
</ScrollView>
</LinearLayout>

Experimented your code and found the issue.
From your code, it does seems like what you want is a Horizontal Scroll. But you are using normal ScrollView which is by default Vertical Scroll. Consider changing ScrollView to HorizontalScrollView.
i.e. from
<ScrollView
android:layout_width="0dp"
android:layout_height="match_parent"
android:scrollbars="horizontal"
android:fillViewport="true"
android:layout_weight="1"
android:layout_marginRight="8dp">
to
<HorizontalScrollView
android:layout_width="0dp"
android:layout_height="match_parent"
android:scrollbars="horizontal"
android:fillViewport="true"
android:layout_weight="1"
android:layout_marginRight="8dp">
Do change on both your scroll view. Cheers!

Since you are fixing weight for the scrollView it thinks that the data should never exceed the height and hence it doesnt scroll. Just cover the scrollviews with frame layouts like below and try.
LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="2">
<FrameLayout android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="horizontal"
android:fillViewport="true"
android:layout_weight="1"
android:layout_marginRight="8dp">
<LinearLayout
android:id="#+id/linearLayoutSizes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginLeft="#dimen/product_detail_items_margin_left"
>
</LinearLayout>
</ScrollView>
<FrameLayout>
<FrameLayout android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="horizontal"
android:fillViewport="true"
android:layout_weight="1"
android:layout_marginLeft="8dp">
<LinearLayout
android:id="#+id/linearLayoutColors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioGroup
android:id="#+id/colorsGroup"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</RadioGroup>
</LinearLayout>
</ScrollView>
</FrameLayout>
</LinearLayout>
See if this works.

See if the following code works for you:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:weightSum="2">
<ScrollView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginRight="8dp"
android:layout_weight="1"
android:fillViewport="true"
android:scrollbars="horizontal">
<LinearLayout
android:id="#+id/linearLayoutSizes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"></LinearLayout>
</ScrollView>
<ScrollView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginLeft="8dp"
android:layout_weight="1"
android:fillViewport="true"
android:scrollbars="horizontal">
<LinearLayout
android:id="#+id/linearLayoutColors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioGroup
android:id="#+id/colorsGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
</RadioGroup>
</LinearLayout>
</ScrollView>
</LinearLayout>

your XML looks ok to me so why dont you try and add a couple of buttons or images to the layouts and try to scroll them?
also dont forget to add this line of code to the very top of your XML file:
<?xml version="1.0" encoding="utf-8"?>
let me know how you get on.

Design a round button over two colored layouts

I'm trying to design something like that :
Currently i'm having issue putting the button at "the middle" of the two layouts reunion point. Is there a way i do this ?
Thanks.

Here is a way to do it
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:background="#FF0000">
<!-- TO ADD CONTENT HERE -->
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:background="#FFFF00"
android:weightSum="0.5">
<!-- TO ADD CONTENT HERE -->
</LinearLayout>
</LinearLayout>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:background="#000000"
android:text="TEST"
android:textColor="#FFFFFF"/>
</RelativeLayout>
OUTPUT:
You can change the layout height from android:layout_weight="0.5"

you can use RelativeLayout for your parent and try adding twoLinearLayouts , one below another and set their heights, now place a Button in your RelativeLayout and set android:layout_centerInParent="true" for your Button .
and if you want to use weight for layouts, instead of adding two LinearLayout to your RelativeLayout, add one LinearLayout with weightSum=100 and then add two LinearLayouts to it with custom weights.
for your case , you have to do sth like this :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="100" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="20"
android:background="#f00" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="80"
android:background="#0f0" >
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="100" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="20" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:text="test" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>

Scrollable layout in FrameLayout

I've a FrameLayout on my android app but I can't make to scrollable a part of this layout...I've tried some solutions to fix this problem, but I can't find a patch!
Pratically, I would like to see scrollable the linearlayout (maybe, linearlayout is not necessary) between Scrollview tags.
This is my xml:
<FrameLayout 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"
tools:context="com.robertot.timereport.com.robertot.timereport.Pages.YearlyStatFragment">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
// Some views to scroll
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/bottom_linear"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
android:layout_gravity="bottom"
style="#android:style/Widget.Holo.Light.ActionBar.Solid">
<Spinner
android:id="#+id/spnYearY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_vertical"
android:layout_marginLeft="8dp"/>
<ImageButton
android:id="#+id/btnFilter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_search"
android:background="#null"
android:layout_weight="1"
android:layout_gravity="center_vertical"/>
</LinearLayout>
</FrameLayout>
Thanks!! :)

In a FrameLayout all the content views are one on top of the other, so the normal behaviour is that the Linear Layout hides part of the previous Scrollview. Why don't you use a LinearLayout or a Relative Layout instead of the FrameLayout?

Thanks to #Fernando! I've solved my problem, as is:
<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="com.robertot.timereport.com.robertot.timereport.Pages.YearlyStatFragment">
<ScrollView
android:id="#+id/scrollyear"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
//Some views
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/bottom_linear"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
android:layout_gravity="bottom"
style="#android:style/Widget.Holo.Light.ActionBar.Solid">
<Spinner
android:id="#+id/spnYearY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_vertical"
android:layout_marginLeft="8dp"/>
<ImageButton
android:id="#+id/btnFilter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_search"
android:background="#null"
android:layout_weight="1"
android:layout_gravity="center_vertical"/>
</LinearLayout>
</LinearLayout>

You can surround the view that you want to be scrollable with a ScrollView, as below:
<ScrollView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff">
// the views here that you want to make scrollable
</ScrollView>