Develop Reference

android GridView issue show rows

I'm working with gridView, each item has an image and a TextView in the footer.
All images have the same size, so I use match_parent or wrap_content as required.
But the screen only show one line and a half on items, it scroll, and that is perfect, but I would like to show two complete rows and then scroll.
Also, when I run the app in small devices, only show 1 line, I would like to show 2 lines always.
I tried to use this example, but it doesn't work to me because stop scrolling.
Here, some of my code XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bg_app">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/black"
android:id="#+id/header"
android:padding="10dp">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/icon_back"
android:src="#drawable/ic_back" />
</RelativeLayout>
<com.xetux.util.ExpandableHeightGridView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center"
android:horizontalSpacing="15dp"
android:isScrollContainer="true"
android:numColumns="3"
android:padding="10dp"
android:id="#+id/family_grid_view"
android:layout_below="#+id/header"
android:verticalSpacing="15dp"/>
<!--<GridView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
android:id="#+id/family_grid_view"
android:horizontalSpacing="15dp"
android:verticalSpacing="15dp"
android:layout_below="#+id/header"
android:numColumns="3"/>-->
</RelativeLayout>
and each item XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/family_image"
android:background="#drawable/bg_family">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/black_transparency"
android:text="FAMILIA"
android:gravity="center"
android:id="#+id/family_name"
android:padding="10dp"
android:layout_alignParentBottom="true"
android:textColor="#color/white"
android:textSize="15sp"/>
</RelativeLayout>

I think your image size is big. You can checkout for supporting multiple screen tutorials. Try using small images for small screen.

Android Recyclerview with GridLayout manager :Center Horizontally and vertically

Hi there i have spent the good part of a day trying to figure this one out.
Problem
So i have a recyclerview (NOT GRIDVIEW) implemented and it is showing 3 icons currently but they are at the top of the desired view. What i require is for the 3 icons to be centered and any x amount of icons that are used to be automatically centered both vertically sand horizontally.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:custom="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Xview" >
<com.exmaple.app.topBar
custom:gameState="paused"
android:id="#id/score_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<com.exmaple.app.BottomBar
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:id="#+id/bottom_bar"
/>
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="#id/score_bar"
android:layout_above="#+id/bottom_bar"
android:layout_centerInParent="true">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:background="#000000"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="top|center"
android:scrollbars="none"
/>
</FrameLayout>
</RelativeLayout>
What i have tried:
I have tried setting the recyclerview to layout:gravity="center"

Android place an image view between two views

I need to create a layout as shown in the image.
The rounded button with the arrow needs to be exactly between the blue and the gray background.
I'm having difficulties placing it without specifying the margins precisely, which is something I don't want to do because there is no guarantee it will look good on all resolutions and devices.
I would appreciate an xml sample for that
Thanks!

Use the desired drawable.. hope it works.. you can set width and height according to your need.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:background="#1b96d9"
android:orientation="vertical" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#e6e6e6"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
<ImageView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="#drawable/arrow" />
</FrameLayout>
</LinearLayout>

android:background stretching not preserving aspect ratio

On landscape mode my background image stretches, I would like the image to enlarge rather than stretch to fit the size. From what I've seen I have to add it to it's own layout (E.g. LinearLayout) or 'ImageView` and the have a layout for the content on the view, am I correct in saying this?
My current xml layout looks like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/instructions"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/photo_background"
android:tag="layout" >
<ScrollView
android:id="#+id/scroll_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fadingEdge="none" >
<include layout="#layout/instructions_internal" />
</ScrollView>
Which includes the following layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scroll_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:id="#+id/instructionsLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/transparent_black" >
<RelativeLayout
android:id="#+id/more_info"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<WebView
android:id="#+id/top_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" />
<Button
android:id="#+id/test"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_below="#+id/top_content"
android:layout_marginBottom="10dp"
android:layout_centerHorizontal="true"
android:onClick="onClickHandler" />
<Button
android:id="#+id/instructionsbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/test"
android:background="#color/dark_gray"
android:drawableLeft="#drawable/arrow_down_float"
android:gravity="left|center"
android:onClick="onMoreInstructions"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:text="#string/more_instructions_start"
android:textColor="#color/solid_white" />
</RelativeLayout>
<WebView
android:id="#+id/bottom_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_below="#+id/more_info"
android:layout_marginTop="10dp" />
</RelativeLayout>
Any guidance on this would be gladly appreciated. Thanks

Yes you're correct. View's background scaling type is equivalent to ImageView's ScaleType.FIT_XY It will mess up the aspect ratio unless you're using wrap_content and the contents do not make it stretch past background bounds.
So in this situation I usually use an ImageView I place behind the view I need to give a properly-scaled background to. (Most likely yo're looking for CENTER_CROP scale type)
UPD here's some code
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/instructions"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:tag="layout" >
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/photo_background"
android:scaleType="centerCrop" />
<ScrollView
android:id="#+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fadingEdge="none" >
<include layout="#layout/instructions_internal" />
</ScrollView>
</FrameLayout>

use an image that matches or in accordance with the android device resolution and screen size.
the image cannot itself enlarge itself, even if you use a linear layout dedicatedly for the image, the image is bound to stretch.
keep images of all possible resolutions in separate folders that you plan to run you application on.

Android: How can you align a button at the bottom and listview above?

I want to have a button at the bottom of the listview.
If I use relativeLayout/FrameLayout, it aligns but listView goes down to very botton.
(Behind the button at the bottom)
FrameLayout:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="#+id/listview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentBottom="true">
<Button
android:id="#+id/btnButton"
android:text="Hello"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom" />
</FrameLayout>
</FrameLayout>
RelativeLayout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="#+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<Button
android:id="#+id/btnButton"
android:text="Hello"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom" />
</RelativeLayout>
</RelativeLayout>
Above two codes only work like the first image. What I want is second image.
Can anybody help?
Thank you.

A FrameLayouts purpose is to overlay things on top of each other. This is not what you want.
In your RelativeLayout example you set the ListViews height and width to MATCH_PARENT this is going to make it take up the same amount of space as its parent, and thus take up all of the space on the page (and covers the button).
Try something like:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ListView
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"/>
</LinearLayout>
The layout_weight dictates how the extra space is to be used. The Button does not want to stretch beyond the space it requires, so it has a weight of 0. The ListView wants to take up all of the extra space, so it has a weight of 1.
You could accomplish something similar using a RelativeLayout, but if it is just these two items then I think a LinearLayout is simpler.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"
>
<ListView android:id="#+id/ListView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1">
</ListView>
<FrameLayout android:id="#+id/FrameLayout01"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button android:id="#+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="button"
android:layout_gravity="center_horizontal">
</Button>
</FrameLayout>
</LinearLayout>
Here is the design you are looking for.
Try it.

I needed two buttons side-by-side at the bottom. I used a horizontal linear layout, but assigning android:layout_height="0dp" and android:layout_weight="0" for the buttons' linear layout didn't work. Assigning android:layout_height="wrap_content" for just the buttons' linear layout did. Here's my working layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/new_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="New" />
<Button
android:id="#+id/suggest_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Suggest" />
</LinearLayout>
</LinearLayout>

RelativeLayout will ignore its children android:layout_width or android:layout_height attributes, if the children have attributes that properly define their left and right or top and bottom values, respectively.
To achieve the result on the right image, showing the list above the button, your layout should look like this:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#android:id/button1"
android:layout_alignParentTop="true"/>
<Button
android:id="#android:id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="#android:string/ok"/>
</RelativeLayout>
The key is to define android:layout_alignParentTop (defines top value) and android:layout_above (defines bottom value) in your RecyclerView. This way, RelativeLayout will ignore android:layout_height="match_parent", and the RecyclerView will be placed above the Button.
Also, make sure you look into android:layout_alignWithParentIfMissing, if you have a more complex layout and you still need to define these values.

I am using Xamarin Android, and my requirement is exactly the same as William T. Mallard, above, i.e. a ListView with 2 side-by-side buttons under it.
The solution is this answer didn't work in Xamarin Studio however - when I set the height of the ListView to "0dp", the ListView simply disappeared.
My working Xamarin Android code is as follows:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="#+id/ListView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_above="#+id/ButtonsLinearLayout" />
<LinearLayout
android:id="#id/ButtonsLinearLayout"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="horizontal"
android:layout_alignParentBottom="true">
<Button
android:id="#+id/Button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
<Button
android:id="#+id/Button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
</RelativeLayout>
I aligned ButtonsLinearLayout to the bottom of the screen, and set the ListView to be above ButtonsLinearLayout.

#jclova one more thing you can do is use layout-below=#+id/listviewid in relative layout

In your relative layout height of listview is match_parent which is fill_parent(for 2.1 and older) so best solution is if you want to use relative layout then first Declare your button then your list view, make list view position as above your button id, If you want button always at bottom then make it alignParentBottom..
Snippet is
<RelativeLayout
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:id="#+id/rl1"><Button
android:layout_width="MATCH_PARENT"
android:layout_height="WRAP_CONTENT"
/><ListView
android:layout_width="MATCH_PARENT"
android:layout_height="0"
android:layout_above="#id/listview"/></RelativeLayout>
This prevents your list view taking whole place and make your button appear..

This will be the best and the most simple solution to the problem. Just add android:layout_above="#id/nameOfId" in the layout that you want to move above with respect to that layout.
<?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="com.sumeru.commons.activity.CommonDocumentUploadActivity">
<ListView
android:id="#+id/documentList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#id/verifyOtp" />
<com.sumeru.commons.helper.CustomButton
android:id="#+id/verifyOtp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="#string/otp_verification" />
</RelativeLayout>