Develop Reference

RelativeLayout or LinearLayout?

I am new to Android development, and I am unable to understand why it is not working as per desired output.
The desired output and the output I am getting are shown below as well as the ml layout.
Desired output
Achieved output
Layout
<?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_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.caringhumans.rds.caringhumans.MainActivity">
<ImageView
android:id="#+id/logo"
android:src="#drawable/logo"
android:layout_width="28dp"
android:layout_height="28dp"
android:layout_toLeftOf="#+id/caring"/>
<TextView
android:id="#+id/caring"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Caring Humans"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textSize="25sp"
android:textColor="#f70f59"/>
<ImageView
android:id="#+id/child"
android:src="#drawable/child"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/caring"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Campaign"
android:textColor="#f70f59"
android:textSize="22sp"
android:layout_below="#+id/child"/>
</RelativeLayout>

Try this
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:drawableLeft="#drawable/logo"
android:gravity="center"
android:text="Caring Humans"
android:textColor="#f70f59"
android:textSize="25sp" />
<ImageView
android:id="#+id/child"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_below="#+id/logo"
android:adjustViewBounds="true"
android:scaleType="center"
android:src="#drawable/child" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/child"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:text="Campaign"
android:textColor="#f70f59"
android:textSize="22sp" />
</RelativeLayout>
The problem is with image trying fixing that and your problem can be resolved.

LinearLayouts are used for placing your Views in a linear shape, either in a row or in a column.
The latter seems to be what you are after.
RelativeLayouts are used when you want to place the positions of your Views in a non linear way, rather using a relation between them (toRightOf, above, or similar).

In order for the Imageview to really "wrap" around the image you are displaying you need to add these two attributes
android:scaleType="fitXY"
android:adjustViewBounds="true"
documentation: https://developer.android.com/reference/android/widget/ImageView.ScaleType.html
as for the parent layout here you should probably use LinearLayouts (you will need to add to them android:orientation="vertical" as the default one is horizontal)

Change your code to this:
<?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_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.caringhumans.rds.caringhumans.MainActivity">
<ImageView
android:id="#+id/logo"
android:src="#drawable/logo"
android:layout_width="28dp"
android:layout_height="28dp"
android:layout_toLeftOf="#+id/caring"/>
<TextView
android:id="#+id/caring"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Caring Humans"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textSize="25sp"
android:textColor="#f70f59"/>
<ImageView
android:id="#+id/child"
android:src="#drawable/child"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/text"
android:layout_below="#+id/caring"/>
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Campaign"
android:textColor="#f70f59"
android:textSize="22sp"
android:layout_alignParentBottom="true"/>
</RelativeLayout>

Adding following two tag into ImageView with id 'child' can resolve your problem.
android:scaleType="fitXY"
android:adjustViewBounds="true"
FitXY scale the image using fill
and you need to set adjustViewBounds to true to adjust its bounds to preserve the aspect ratio of its drawable.

<ImageView
android:id="#+id/child"
android:src="#drawable/child"
android:layout_width="wrap_content"
android:scaleType="centerCrop"
android:adjustViewBounds="true"
android:layout_height="256dp"
android:layout_below="#+id/caring"/>
This would help you to achieve desired layout. Increase height of image according to your needs. :)

Make ImageView take up all available vertical space and grow width to scale up/down proportionally in RelativeLayout

I'm targeting API level 21 and min is also 21 (I support Lollipop only for now, it's a pet project to learn).
I'm having problems with a custom ListView item layout. Here is my XML:
<?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="wrap_content">
<ImageView
android:id="#+id/test_list_item_icon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_marginEnd="10dp"
android:background="#FF0000"
android:src="#drawable/ic_test"
tools:ignore="ContentDescription"/>
<TextView
android:id="#+id/test_list_item_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toEndOf="#id/test_list_item_icon"
android:textSize="50sp"/>
</RelativeLayout>
And here is what it looks like (the icon's red background color is only to see how big the actual view is):
I would like the image view to behave like the following: take up the available vertical space at the 'start'/left of the layout, have the image scale proportionally, and have the width be grown so that the image can be fully shown, like this (pardon my gimp skills):
Is it possible?

Try this for your ImageView
<?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">
<ImageView
android:id="#+id/test_list_item_icon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_marginEnd="10dp"
android:background="#FF0000"
android:src="#drawable/ic_test"
android:adjustViewBounds="true"
android:scaleType="fitXY"
tools:ignore="ContentDescription"/>
<TextView
android:id="#+id/test_list_item_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toEndOf="#id/test_list_item_icon"
android:textSize="50sp"/>
</RelativeLayout>

In the end I decided to create one more icon size, xxxhdpi, and it all looks nice now.
Many thanks to #corsair992 for information about the bug in one of the comments.

HI wujek the reason for your problem is you set height as wrap content for your relative layout . so it will take the textview's height as its height .then image view will use this as its height .so change relative layout height to match parent. Please try and let me know thanks
<?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="wrap_content" >
<ImageView
android:id="#+id/test_list_item_icon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_marginEnd="10dp"
android:adjustViewBounds="true"
android:background="#ff0000"
android:src="#drawable/ic_launcher"
tools:ignore="ContentDescription" />
<TextView
android:id="#+id/test_list_item_name"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_toRightOf="#+id/layout_1"
android:gravity="center"
android:text="bhsbd"
android:textSize="50sp" />

try this
if u want to image should capture imageview size use background insted src.
if red background is mandatory use another relative layout as parent for imageview.
hope it works fo u..
<?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="wrap_content" >
<RelativeLayout
android:id="#+id/layout_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:background="#FF0000" >
<ImageView
android:id="#+id/test_list_item_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="10dp"
android:background="#drawable/ic_launcher"
android:adjustViewBounds="true"
tools:ignore="ContentDescription" />
</RelativeLayout>
<TextView
android:id="#+id/test_list_item_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/layout_1"
android:textSize="50sp" />
</RelativeLayout>
edit 2
<?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="wrap_content" >
<RelativeLayout
android:id="#+id/layout_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/test_list_item_name"
android:layout_alignTop="#+id/test_list_item_name"
android:background="#FF0000" >
<ImageView
android:id="#+id/test_list_item_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:src="#drawable/ic_launcher"
android:adjustViewBounds="true"
tools:ignore="ContentDescription" />
</RelativeLayout>
<TextView
android:id="#+id/test_list_item_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/layout_1"
android:textSize="50sp"
android:text=" text 5>" />
</RelativeLayout>

Define a LineatLayout with weightsum.
<LinearLauyout
----
android:orientation="horizontal"
android:weightSum="5">
<ImageView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="4">
</LinearLayout>
you can adjust the weightsum as per your requirement.

Problems with RelativeLayout Android

I am new to Java and Android and I am facing this problem:
I would like to add a photo to the top/left corner of a Rectangle. However, the ImageView of my photo gets always more space and so, it creates a blank space on top that I would not like to have. Here is a screenshot:
The code of my Layout is:
<?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:padding="25dp">
<ImageView
android:id="#+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/profile_frame" />
<ImageView
android:id="#+id/imageView2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/imageView1"
android:layout_centerVertical="true"
android:src="#drawable/foto_facebook_juan_mejorada" />
</RelativeLayout>

Try this:
android:scaleType="fitStart"
android:adjustViewBounds="true"

It may be because of
size of the image. If the image not fit in the space given it will add blank space.

// try this way
<?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:gravity="center">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="30dp">
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/profile_frame" />
<ImageView
android:id="#+id/imageView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitXY"
android:src="#drawable/foto_facebook_juan_mejorada" />
</FrameLayout>
</LinearLayout>

Overlay image over another android

I have photo album which shows the image as rounded with white border. Image will be adding dynamically. I tried frame layout but it it not working for me. My try : Adding dynamic image over already existing round shape image..
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:id="#+id/image"
android:layout_width="60dip"
android:layout_height="60dip"
android:adjustViewBounds="true"
android:scaleType="centerCrop" />
<ImageView
android:id="#+id/imagef"
android:layout_width="100dp"
android:layout_height="100dp"
android:background="#drawable/ph_bg" />
</FrameLayout>
Above xml not giving exact result .. any idea ?

Use below xml
<?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" >
<ImageView
android:id="#+id/image"
android:layout_width="60dip"
android:layout_height="60dip"
android:adjustViewBounds="true"
android:layout_centerInParent="true"
android:scaleType="centerCrop" />
<ImageView
android:id="#+id/imagef"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_centerInParent="true"
android:background="#drawable/ph_bg" />
</RelativeLayout>
This will do your task.
Happy coding :)

Try setting foreground and background on only one ImageView.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/your_img_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#drawable/the_actual_image"
android:src="#drawable/the_image_overlay" />
</RelativeLayout>

Androird/Eclipse : Stretching an image to fit with screen borders

I have this 9-patch picture "Imageview3"
I want to add in my activity. I want the red arms to matchs perfecty with the borders of the screen.
But when I do SCALE:fitXy here is what I obtain
so as you can seem it doesn't work, I tried all the scales, I tried to stretch the image but it never fits.
Here is my code
<?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="wrap_content"
android:orientation="vertical" >
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1" >
<ImageView
android:id="#+id/imageView2"
android:layout_width="324dp"
android:layout_height="fill_parent"
android:scaleType="centerCrop"
android:paddingTop="150dp"
android:paddingRight="0dp"
android:src="#drawable/diviseur" />
<ImageView
android:id="#+id/imageView3"
android:layout_width="407dp"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitXY"
android:src="#drawable/a1"
android:visibility="visible" />
</FrameLayout>
</LinearLayout>
thanks for the help

Remove android:scaleType="fitXY" and keep android:layout_width="match_parent". Try it.

Make sure your actual image doesn't have a white border around it. As in, make sure the arms are at the very end of your image.

Instead of using android:src="#drawable/diviseur", try using android:background="#drawable/diviseur". And also consider using android:layout_weight="1" attribute.

Try this
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/banner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="fitCenter"
android:adjustViewBounds="true"
android:src="#drawable/foo"
/>