Develop Reference

Android Scrollview content size smaller when should be

I want to have a "fixed_space" at the top of screen and a "scrollview" at the bottom of the screen which should be below fixed_space. The rest of the screen is a container "rest_space".
Unfortunately my scrollview has a shorter height(by 100dp which fixed_space has) ,if content is too big/scrollable.
I tried to achieve same with ConstraintLayout and RelativeLayout, but I have got same result.
Any ideas why scrollview has 100dp shorter height, as it should be?
EDIT: Scrollview should take as much space as she needs.
<?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">
<View
android:id="#+id/fixed_space"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#android:color/holo_red_dark" />
<View
android:id="#+id/rest_space"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#android:color/black" />
<ScrollView
android:id="#+id/scrollview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/holo_green_dark"
android:fillViewport="true">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="START OF SCROLLVIEW \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nMIDDLE OF SCROLLVIEW \n\n\n\n\n\n\n\n\n\n\n\nEND OF SCROLLVIEW" />
</ScrollView>
</LinearLayout>

Try this:
<?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">
<View
android:id="#+id/fixed_space"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#android:color/holo_red_dark" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<View
android:id="#+id/rest_space"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/scrollview"
android:background="#android:color/black" />
<ScrollView
android:id="#+id/scrollview"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/holo_green_dark"
android:fillViewport="true">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="START OF SCROLLVIEW \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nMIDDLE OF SCROLLVIEW \n\n\n\n\n\n\n\n\n\n\n\nEND OF SCROLLVIEW" />
</ScrollView>
</RelativeLayout>
</LinearLayout>

Ok, I think this should solve your probem:
First, I started by using RelativeLayout. I did it in order to get the fixed_space aligned to the top and the scrollview aligned to the bottom.
Then I changed the View for a LinearLayout and put a TextView within it so I could use wrap_content and this is the tricky part:
When you use ScrollView with wrap_content and a View with the weight stuff, Android can't make the calculations it needs to get the screen drawed because there is no reference. When I put the TextView with wrap_content itself that gives the reference because Android know the size of the text.
You don't have to use the TextView but you will need anything that gives Android that reference.
In this case, the scrollview is going to be stretched, not the LinearLayout. If you want the second to get strached, then I'm afraid you are going to need to set a fixed height to your scrollview.
<?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:orientation="vertical">
<View
android:id="#+id/fixed_space"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_alignParentTop="true"
android:background="#android:color/holo_red_dark" />
<LinearLayout
android:id="#+id/rest_space"
android:layout_below="#+id/fixed_space"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/black">
<TextView
android:text="Test"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<ScrollView
android:id="#+id/scrollview"
android:layout_below="#id/rest_space"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/holo_green_dark"
android:layout_alignParentBottom="true">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="START OF SCROLLVIEW \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nMIDDLE OF SCROLLVIEW \n\n\n\n\n\n\n\n\n\n\n\nEND OF SCROLLVIEW" />
</ScrollView>
</RelativeLayout>

Two ListView in ScrollView

I have put two listview in scrollview but i have a problem, when i put item in the first listview the second listview will be scrollable. I want that the whole area will be scrollable and not scrollview, How i do? the first scrollview is listViewEventiAggiunti the second listViewEventi.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
android:layout_height="match_parent"
android:layout_width="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:fillViewport="true">
<LinearLayout android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:id="#+id/activity_lista__eventi"
android:paddingBottom="#dimen/padBottom"
android:paddingLeft="#dimen/padLeft"
android:paddingRight="#dimen/padRight"
android:paddingTop="#dimen/padTop"
xmlns:android="http://schemas.android.com/apk/res/android"
tools:context="com.example.fra87.eudroid.activity_class.Lista_Eventi">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="vertical">
<SearchView
android:layout_width="match_parent"
android:layout_height="50dp"
android:queryHint="Evento"
android:id="#+id/cercaEvento"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:id="#+id/linearLayoutEventi">
<EditText
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="Nome Evento"
android:textSize="22dip"
android:id="#+id/editText_nome_evento_composto"/>
<ListView
android:id="#+id/listViewEventiAggiunti"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp" />
<View
android:layout_width="match_parent"
android:layout_height="5dp"
android:id="#+id/separatore_liste"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:background="#android:color/darker_gray"/>
<ListView
android:id="#+id/listViewEventi"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/cercaEvento"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp" />
</LinearLayout>
</LinearLayout>
</ScrollView>
I want scroll entire area, i don't want scroll on listview, when i put item in listview the area increases and i scroll entire area is possible?

Ok. Since your minimum SDK version is 16, you have 2 solution for your problem.
First is use this library:
https://github.com/PaoloRotolo/ExpandableHeightListView
This library makes you able to expand your ListViews to full height and then only your ScrollView will be scrollable.
Second solution is to use NestedScrollView instead of ScrollView and then use RecyclerView instead of ListView. Then you should only disable nestedScrolling for your RecyclerView.
Both solutions will give you your desire behavior.

You can use multiple type item for listview and simplified your layout to become like this
<?xml version="1.0" encoding="utf-8"?><?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:id="#+id/activity_lista__eventi"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="#dimen/padBottom"
android:paddingLeft="#dimen/padLeft"
android:paddingRight="#dimen/padRight"
android:paddingTop="#dimen/padTop"
tools:context="com.example.fra87.eudroid.activity_class.Lista_Eventi"
>
<SearchView
android:id="#+id/cercaEvento"
android:layout_width="match_parent"
android:layout_height="50dp"
android:queryHint="Evento"
/>
<EditText
android:id="#+id/editText_nome_evento_composto"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="#+id/cercaEvento"
android:hint="Nome Evento"
android:textSize="22dip"
/>
<View
android:id="#+id/separatore_liste"
android:layout_width="match_parent"
android:layout_height="5dp"
android:layout_below="#+id/editText_nome_evento_composto"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="#android:color/darker_gray"
/>
<ListView
android:id="#+id/listViewEventi"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/separatore_liste"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp"
/>
</RelativeLayout>

Get the second quarter of layout's heigth

I have some difficulties with designing my app. My screen should contain toolbar and some edit fields. these fields should be places in the upper part of the screen under the toolbar. In the end it should look like this (sorry for quality of the image):
For this I decided to break the screen height into four equals parts and to pose my edit fields in the second quarter. I tried to use the following code to acchieve this, but it doesn't help: all the smaller relative layouts take all the screen.
I also tried:
to substitute the parent Relative layout with Linear layout
to replace "fill_parent" with "wrap_content".
After these actions the smaller layouts simply disappear.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:baselineAligned="false" >
<include android:id = "#+id/toolbarLogo" layout="#layout/toolbar_logo"></include>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.25"
/>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.25"
>
<EditText
.../>
<EditText
...
/>
<Button
.../>
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.5"
/>
</RelativeLayout>
Could you help me please with this problem?

Change your root layout to be a LinearLayout and ensure that the orientation is set to vertical. Change the layout_width of the children to be 1. See code below for an example:
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#f00"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#0f0"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#00f"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#f0f"/>
</LinearLayout>

Try It.. Set
android:layout_weight="1"
for each LinearLayout and
set
android:weightSum="4"
for Parent LinearLayout and
Like This Example..
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="4">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#0ff"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#ff2"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#01a"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#101"/>
</LinearLayout>
</RelativeLayout>

You can use google library PercentRelativeLayout with this library you can set width, height and margin of your views by procentege which is great because in all screen they look the same and of course it is not hard to code it. Here example:
<android.support.percent.PercentRelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
app:layout_widthPercent="50%"
app:layout_heightPercent="50%"
app:layout_marginTopPercent="25%"
app:layout_marginLeftPercent="25%"/>
</android.support.percent.PercentRelativeLayout>
you must add this line in your build.gradle
dependencies {
compile 'com.android.support:percent:23.2.0'
}
Official documentation by Google https://developer.android.com/reference/android/support/percent/PercentRelativeLayout.html
And for your case should look maybe like this:
<RelativeLayout
android:id="#+id/firstLayout"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_heightPercent="10%"
/>
<LinearLayout
android:id="#+id/secondLayout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_below="#+id/firstLayout"
android:orientation="vertical"
app:layout_heightPercent="40%">
<EditText
android:layout_width="200dp"
android:layout_height="60dp"/>
<EditText
android:layout_width="200dp"
android:layout_height="60dp"/>
<Button
android:layout_width="200dp"
android:layout_height="60dp"/>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_below="#+id/secondLayout"
app:layout_heightPercent="30%"
/>
</android.support.percent.PercentRelativeLayout>
Hope this helps.

Background image for a button in android

I am trying to add a background image for a button and it is working, but not as I expected.
1st picture (without background)
2nd picture (with background)
I would like the background to cover only the button. In other words, the image should have the same form as the 2 buttons from above (I'm talking about the round corners and a bit smaller size).
Here is the xml of the layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/activity_main" tools:context=".MainActivity"
android:orientation="vertical">
<LinearLayout android:layout_weight="1" android:layout_height="fill_parent" android:layout_width="fill_parent">
<Button
android:onClick="playerStats"
android:text="#string/plStats"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
<LinearLayout android:layout_weight="1" android:layout_height="fill_parent" android:layout_width="fill_parent">
<Button
android:text="#string/comp"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
<LinearLayout android:layout_weight="1" android:layout_height="fill_parent" android:layout_width="fill_parent">
<Button
android:background="#drawable/calendar"
android:text="#string/calendar"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>

its easy to do that
you should use ImageButton and remove those Buttons for example
<ImageButton
android:src="#drawable/calendar"
android:text="#string/calendar"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
also if you want to remove the background of that button you can use :
android:background="#null"

Replace your layout with these layout...It can be helpfil for you
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/activity_main" tools:context=".MainActivity"
android:orientation="vertical">
<LinearLayout android:layout_weight="1" android:layout_height="match_parent" android:layout_width="match_parent">
<Button
android:onClick="playerStats"
android:text="#string/plStats"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
<View ////I HAVE ADDED VIEW WHICH IS TRASNPARENT TO SEPRATE THE BUTTONS
android:layout_width="fill_parent"
android:layout_height="10dp"
android:background="#android:color/transparent" >
</View>
<LinearLayout android:layout_weight="1" android:layout_height="match_parent" android:layout_width="match_parent">
<Button
android:text="#string/comp"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
<View ////I HAVE ADDED VIEW WHICH IS TRASNPARENT TO SEPRATE THE BUTTONS
android:layout_width="fill_parent"
android:layout_height="10dp"
android:background="#android:color/transparent" >
</View>
<LinearLayout android:layout_weight="1" android:layout_height="match_parent" android:layout_width="match_parent">
<Button
android:background="#drawable/calendar"
android:text="#string/calendar"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
<View ////I HAVE ADDED VIEW WHICH IS TRASNPARENT TO SEPRATE THE BUTTONS
android:layout_width="fill_parent"
android:layout_height="10dp"
android:background="#android:color/transparent" >
</View>

The simplest solution is: You need to edit your image background (make it a little smaller and have corner) - it can be done easily by using Photoshop
Than use 9-patch tool for make 9-patch image (9-patch images can automatically resize to accommodate the contents of the view and the size of the screen)

The "without background" button is actually displaying it default background, so setting new background will override that corner-rounded-gray thing...
Check this question.
I recommend using ImageButton with android:src instead.

Map fragment filling almost all the screen

I am trying to share the height of my screen's layout between a MapFragment and a simple TextView, in such a way that the small TextView at the bottom of the screen takes all the space it needs, while the GoogleMap fragment fills the rest of the available screen.
like this:
The only problem is that I was only able to obtain such result by statically specifying the fragment's android:layout_height at 450dp, and I haven't found a way to do so dynamically, so that the layout would adapt both its landscape mode and to mobiles with different screen sizes.
This is what I've tried to do:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_height="match_parent"
android:layout_width="match_parent" tools:context="madapps.bicitourbo.DetailsFragmentTwo">
<LinearLayout android:id="#+id/map"
android:layout_height="wrap_content" android:layout_width="match_parent"
android:orientation="vertical"
android:weightSum="10">
<!--android:paddingRight="16dp"-->
<!--android:paddingLeft="16dp"-->
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mapFrag"
android:layout_height="0dp"
android:layout_width="match_parent"
android:layout_weight="9"
android:name="com.google.android.gms.maps.MapFragment"/>
<TextView android:id="#+id/headerTitle"
android:gravity="center_horizontal"
android:layout_height="0dp"
android:layout_width="match_parent"
android:text="Partenza da: Piazza Santo Stefano"
android:textSize="#dimen/textSizeBig" android:textColor="#color/textLightBlack"
android:layout_marginBottom="16dp"
android:layout_marginTop="16dp"
android:layout_weight="1"/>
</LinearLayout>
</ScrollView>
and this is the unwanted outcome:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_height="match_parent"
android:layout_width="match_parent" tools:context="madapps.bicitourbo.DetailsFragmentTwo">
<LinearLayout android:id="#+id/map"
android:layout_height="match_parent" android:layout_width="match_parent"
android:orientation="vertical"
android:weightSum="10">
<!--android:paddingRight="16dp"-->
<!--android:paddingLeft="16dp"-->
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mapFrag"
android:layout_height="0dp"
android:layout_width="match_parent"
android:layout_weight="9"
android:name="com.google.android.gms.maps.MapFragment"/>
<TextView android:id="#+id/headerTitle"
android:gravity="center_horizontal"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="Partenza da: Piazza Santo Stefano"
android:textSize="#dimen/textSizeBig" android:textColor="#color/textLightBlack"
android:layout_marginBottom="16dp"
android:layout_marginTop="16dp"
android:layout_weight="1"/>
</LinearLayout>
The android:weightSum gives the LinearLayout a total weight of 10.
So the fragment gets 9/10 of the LinearLayout, and the TextView gets 1/10 of the layout.

you can use RelativeLayout for this
<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"
tools:context="madapps.bicitourbo.DetailsFragmentTwo">
<RelativeLayout
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<!--android:paddingRight="16dp"-->
<!--android:paddingLeft="16dp"-->
<TextView
android:id="#+id/headerTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="16dp"
android:layout_marginTop="16dp"
android:gravity="center_horizontal"
android:text="Partenza da: Piazza Santo Stefano"
android:textColor="#color/textLightBlack"
android:textSize="#dimen/textSizeBig" />
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mapFrag"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/headerTitle" />
</RelativeLayout>
</ScrollView>

The comments to my question solved it.
The android:layout_weight attribute wasn't working only because putting a ScrollView as the root tag blocks its effects.
By putting a RelativeLayout as root tag the weigth attribute works, and the TextView should expand as needed upward while the map would adjust.