Develop Reference

Make EditText height dynamically adjust

The first picture shows an EditText of a fixed size. What I want to have is the height should adjust to fill the the space available above the spinner.
I may increase the the size of the height but I want to be the same for different screen sizes. One more thing I need to note is that I want the feature in the second picture to be preserved. When the keyboard appears, I want the spinner to move up and not be hidden underneath.
Thank you
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/textify" />
<ScrollView
android:id="#+id/myScrollView"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1" >
<LinearLayout
android:id="#+id/widget37"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<EditText
android:id="#+id/field"
android:layout_width="match_parent"
android:layout_height="321dp"
android:layout_marginTop="10dip"
android:hint="#string/text_hint"
android:inputType="textAutoCorrect|textMultiLine"
android:gravity="left|top"
android:singleLine="false"
android:scrollHorizontally="false"
android:scrollbars="vertical"
android:overScrollMode="always"
android:textSize="18sp" >
</EditText>
</LinearLayout>
</ScrollView>
<Spinner
android:id="#+id/spinner1"
android:layout_width="match_parent"
android:layout_height="51dp" />
</LinearLayout>

Noob here, but I would also recommend using the layout_weight in your linear layout in hopes that the EditText would adjust according to other view elements. Or it wouldn't be hard to switch to a RelativeLayout and link the EditText bottom with the Spinner top.

How to make widget in the middle of layout stretch to fill the parent in Android

I have an Android layout question. I have a display where I am putting some text into the middle of a view that has a header at the top and three buttons at the bottom. What I am having trouble with is getting the TextView (which is inside a ScrollView) to stretch to fill up the available screen space. If I set the layout_height of the ScrollView to "fill_parent" the three buttons are pushed off the bottom of the screen. If I set it to "wrap_content" it is only as large as is needed to support the text that is put into the TextView.
Here is the XML for the layout I am using:
<?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="fill_parent"
android:orientation="vertical" >
<LinearLayout android:orientation="horizontal"
android:gravity="top"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher">
</ImageView>
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
style="#android:style/TextAppearance.Large"
android:text="#string/meetingdetail" />
</LinearLayout>
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="#+id/meeting"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
style="#android:style/TextAppearance.Medium" />
</ScrollView>
<Button android:id="#+id/navigation"
android:text="#string/naviation"
android:onClick="meetingInfoOnClick"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<Button android:id="#+id/mapsingle"
android:text="#string/mapsingle"
android:onClick="meetingInfoOnClick"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<Button android:id="#+id/goback"
android:text="#string/goback"
android:onClick="meetingInfoOnClick"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Could someone suggest what would work best to make the ScrollView with the TextView fill up the available space but still allow the three buttons to appear?

Set the height of the ScrollView to 0dp and its weight to 1.
<ScrollView
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
<TextView android:id="#+id/meeting"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
style="#android:style/TextAppearance.Medium" />
</ScrollView>
However if you don't plan to have more than one views scrollable you should remove the ScrollView and use:
android:scrollbars="vertical"
attribute on your TextView since the TextView is scrollable itself.

Just replace your ScrollView tag code to..
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView android:id="#+id/meeting"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
style="#android:style/TextAppearance.Medium" />
</ScrollView>
It will work fine, if still you have any problem then tell me. if works then accept as answer.

Difficulty with ScrollView and LinearLayout

I'm trying to make an Android layout: 3 components inside a vertical LinearLayout. The center component is a ScrollView that contains a TextView. When the TextView contains a significant amount of text (more than can fit on the screen), the ScrollView grows all the way to the bottom of the screen, shows scrollbars, and pushes the last component, a LinearLayout with a Button inside, off the screen.
If the text inside the TextView inside the ScrollView is short enough, the button at the bottom of the screen is positioned perfectly.
The layout I'm trying to achieve is:
The XML for the layout I've written is:
<?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">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:layout_marginTop="10dip"
android:layout_marginBottom="10dip"
android:text="Title />
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="web"
android:textColor="#FFFFFF"
android:background="#444444"
android:padding="10dip" />
</ScrollView>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
<LinearLayout
android:orientation="horizontal"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<Button android:id="#+id/login_button"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_weight="1"
android:text="#string/next_button"/>
</LinearLayout>
</LinearLayout>

The scrollview is the second view object and is set to wrap_content, which is more than the screen.
I recommend a RelativeLayout. Top textview first with android:alignParentTop="true", the bottom LinearLayout next with android:alignParentBottom="true" and the scrollview listed last in the xml with the value android:alignBelow="#id/whatYouCallTheHeader.
This will align the bottom bar at the bottom of the screen, and the header at the top, no matter the size. Then the scrollview will have its own place, after the header and footer have been placed.

you should go for relativeLayout rather than LinearLayout. And you can use some properties like alignBelow and all.

Try adding a layout weight into the ScrollView ie.
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
This worked for me in a situation almost identical to the one you're presenting but left me wondering why, because it is counter-intuitive that increasing the layout weight of a control from 0 (the default if you don't specify a layout_weight) to 1 should make a control which is already using too much space smaller.
I suspect the reason it works is that by not specifying a layout_weight you actually allow the layout to ignore the size of the scroll view relative to other controls and conversely if do specify one you give it permission to shrink it in proportion to the weights you assign.

![Fixed Header-Footer and scrollable Body layout ][1]
This is what you are looking for . Most of the app in android had this type of layout ,
a fixed header and footer and a scrollable body . The xml for this layout is
<?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:background="#5599DD"
android:layout_height="fill_parent">
<!-- Header goes here -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:layout_marginTop="10dip"
android:layout_marginBottom="10dip"
android:textSize="20sp"
android:layout_gravity="center"
android:text="Title" />
<!-- Body goes here -->
<ScrollView
android:layout_weight="1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="web"
android:text="#string/lorem_ipsum"
android:textColor="#FFFFFF"
android:padding="10dip" />
</ScrollView>
<!-- footer goes here -->
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="#+id/login_button"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="bottom"
android:layout_alignParentRight="true"
android:text="Button"/>
</RelativeLayout>
</LinearLayout>
</LinearLayout>

android:layout_height 50% of the screen size

I just implemented a ListView inside a LinearLayout, but I need to define the height of the LinearLayout (it has to be 50% of the screen height).
<LinearLayout
android:id="#+id/widget34"
android:layout_width="300px"
android:layout_height="235px"
android:orientation="vertical"
android:layout_below="#+id/tv_scanning_for"
android:layout_centerHorizontal="true">
<ListView
android:id="#+id/lv_events"
android:textSize="18sp"
android:cacheColorHint="#00000000"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/tv_scanning_for"
android:layout_centerHorizontal="true">
</ListView>
</LinearLayout>
Is that possible?
I did something similar for a button and an EditText, but doesn't seem to work on Layouts.
This is my Code:
//capture the size of the devices screen
Display display = getWindowManager().getDefaultDisplay();
double width = display.getWidth();
//my EditText will be smaller than full screen (80%)
double doubleSize = (width/5)*4;
int editTextSize = (int) doubleSize;
//define the EditText
userName = (EditText) this.findViewById(R.id.userName);
password = (EditText) this.findViewById(R.id.password);
//set the size
userName.setWidth(editTextSize);
password.setWidth(editTextSize);

Set its layout_height="0dp"*, add a blank View beneath it (or blank ImageView or just a FrameLayout) with a layout_height also equal to 0dp, and set both Views to have a layout_weight="1"
This will stretch each View equally as it fills the screen. Since both have the same weight, each will take 50% of the screen.
*See adamp's comment for why that works and other really helpful tidbits.

This is easy to do in xml. Set your top container to be a LinearLayout and set the orientation attribute as you wish. Then inside of that place two linearlayouts that both have "fill parent" on width and height. Finally, set the weigth attribute of those two linearlayouts to 1.

This is my android:layout_height=50%
activity:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/alipay_login"
style="#style/loginType"
android:background="#27b" >
</LinearLayout>
<LinearLayout
android:id="#+id/taobao_login"
style="#style/loginType"
android:background="#ed6d00" >
</LinearLayout>
</LinearLayout>
style:
<style name="loginType">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">match_parent</item>
<item name="android:layout_weight">0.5</item>
<item name="android:orientation">vertical</item>
</style>

best way is use
layout_height="0dp"
layout_weight="0.5"
for example
<WebView
android:id="#+id/wvHelp"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5" />
<TextView
android:id="#+id/txtTEMP"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5"
android:text="TextView" />
WebView,TextView have 50% of the screen height

To make sure the height of a view is 50% of the screen then we can create two sub LinearLayouts in a LinearLayout. Each of the child LinearLayout should have "android:layout_weight" of 0.5 to cover half the screen
the parent LinearLAyout should have "android:orientation" set to vertical
.
.
here is code for your reference....
this code contains two buttons of height half the screen
<LinearLayout
android:orientation="vertical"
android:layout_height="match_parent">
<LinearLayout
android:layout_weight="0.5"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:padding="10dp"
android:layout_weight="0.5"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="button1"
android:id="#+id/button1"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true"
/>
<Button
android:padding="10dp"
android:layout_weight="0.5"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:text="button2"
android:id="#+id/button2"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
/>
</LinearLayout>
<LinearLayout
android:layout_weight="0.5"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>

This kind of worked for me.
Though FAB doesn't float independently, but now it isn't getting pushed down.
Observe the weights given inside the LinearLayout
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/andsanddkasd">
<android.support.v7.widget.RecyclerView
android:id="#+id/sharedResourcesRecyclerView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="4"
/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="bottom|right"
android:src="#android:drawable/ic_input_add"
android:layout_weight="1"/>
</LinearLayout>
Hope this helps :)

You should do something like that:
<LinearLayout
android:id="#+id/widget34"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_below="#+id/tv_scanning_for"
android:layout_centerHorizontal="true">
<ListView
android:id="#+id/lv_events"
android:textSize="18sp"
android:cacheColorHint="#00000000"
android:layout_height="1"
android:layout_width="fill_parent"
android:layout_weight="0dp"
android:layout_below="#+id/tv_scanning_for"
android:layout_centerHorizontal="true"
/>
</LinearLayout>
Also use dp instead px or read about it here.

it's so easy if you want divide your screen two part vertically ( top30% + bottom70%)
<LinearLayout
android:id="#+id/LinearLayoutTop"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2">
</LinearLayout>
<LinearLayout
android:id="#+id/LinearLayoutBottom"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
</LinearLayout>

To achieve this feat, define a outer linear layout with a weightSum={amount of weight to distribute}.
it defines the maximum weight sum. If unspecified, the sum is computed by adding the layout_weight of all of the children. This can be used for instance to give a single child 50% of the total available space by giving it a layout_weight of 0.5 and setting the weightSum to 1.0.Another example would be set weightSum=2, and if the two children set layout_weight=1 then each would get 50% of the available space.
WeightSum is dependent on the amount of children in the parent layout.

You can use android:weightSum="2" on the parent layout combined with android:layout_height="1" on the child layout.
<LinearLayout
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:weightSum="2"
>
<ImageView
android:layout_height="1"
android:layout_width="wrap_content" />
</LinearLayout>

TextView inside LinearLayout stretches the LinearLayout and fill_parent fix causes weight flip

If I have 2 LinearLayouts split %50/%50 everything is fine. Weights are 1 and 1. As soon as I add a TextView inside the top LinearLayout, it stretches that layout. I use wrap_content as the documentation says I should when it comes to weights.
As you can see the red and green should be split evenly and text on grey background should be inside red box. Here is the code:
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#ff0000"
>
<TextView
android:text="#string/hello"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#cccccc"
android:textColor="#000000"/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#00ff00"
>
</LinearLayout>
Now if I switch to "fill parent" as follows it actually works but it creates another problem. Here is the code (so far so good):
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#ff0000"
>
<TextView
android:text="#string/hello"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#cccccc"
android:textColor="#000000"/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#00ff00"
>
</LinearLayout>
So looking at above we were forced to use fill_parent and we would think like we fixed the problem but here is the problem if we are using fill_parent (I took out the TextView just to show the problem, TextView doesn't make the problem go away anyways):
<?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"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="3"
android:background="#ff0000"
>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2"
android:background="#00ff00"
>
</LinearLayout>
</LinearLayout>
As you can see I assign the weights 3 (top red) and 2 (bottom green) but what actually happens is they get flipped: The red becomes 2 and bottom becomes 3. Just measure the pixels too see.
Here are the results of the 3 codes:
Just to be clear, every single time the layout was wrapped inside this (the top layout):
android:layout_width="fill_parent"
android:layout_height="fill_parent"
With XML version="1.0" encoding="utf-8" and proper namespace.

Combined child view weights should add up to 1..... Eg. .3, .3, .4 = 1, or 100%

Try adding a child view to the bottom layout.