Develop Reference

how to set images inside a layout on screen?

I need to put two images one below the other in the center of the screen. They need to be in the center. the images will keep changing depending on the code so how do i get the images to work on all screens without moving or the size increasing or decreasing?
I tried using grid view but it seems too much code for two images. it works but is there anything more efficient?

For this type of design i always create a center point on screen,check below code -
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="#+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher"
android:layout_centerHorizontal="true"
android:layout_above="#+id/center_point" />
<View
android:id="#+id/center_point"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_centerInParent="true"/>
<ImageView
android:id="#+id/image2"
android:src="#drawable/ic_launcher"
android:layout_below="#+id/center_point"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true" />
it will surely works.
All the best

If u have always only 2 images, you can set it in xml file like that:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="#+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<ImageView
android:id="#+id/image2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true" />
</RelativeLayout>
First image centers in parent and the second one centers horizontal and also aligns bottom of the screen.
Good luck.

Here this code may help you.You must create one LinearLayout and set him vertical orientation and layout_gravity = center horizontal.After that create two image views which are automatic position in center of the screen one below other.I hope this will help you.Happy coding :)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_gravity="center_horizontal">
<ImageView
android:id="#+id/image_view_two"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher"
/>
<ImageView
android:id="#+id/image_view_one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
</LinearLayout>

Make a vertical Linear-layout that contains both of your ImageViews and then set an equal layout_weight for both of them. Set the layout_centerInParent true for your Linear_layout
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="#+id/lock_layout_keypad"
android:orientation="vertical"
android:layout_centerInParent="true"
android:layout_marginBottom="4dp">
<ImageView
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imageView"
android:src="#drawable/ic_launcher"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<ImageView
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imageView2"
android:src="#drawable/ic_launcher"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</LinearLayout>
You can remove android:layout_weight.

Alignment of expanding view in Relative Layout

I got three images of a frame, left , mid and right. The left and right are normal images which i give as wrap content. The center one is a patched image that can expand horizontally. I need to use relative layout to align them. But the center image must not have fix size(as it expands horizontally). I can do it using linear layout by following code:
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/cD"
android:src="#drawable/l_left_corner" />
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#drawable/l_vertical_streatch"
android:contentDescription="#string/cD" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/cD"
android:src="#drawable/l_right_corner" />
</LinearLayout>
Can anyone tell me how to do the same in relative layout(if possible, in frame layout too)?
Edit: My full layout (with nested weights)
http://pastie.org/8469454#1-2

You can use following code, just switch 40dp from my left and right ImageViews to wrap_content when you use some real image.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ImageView
android:id="#+id/image_left"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:background="#FF0000"
/>
<ImageView
android:id="#+id/image_center"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_centerHorizontal="true"
android:layout_toRightOf="#id/image_left"
android:layout_toLeftOf="#id/image_right"
android:background="#00FF00"
/>
<ImageView
android:id="#+id/image_right"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:background="#0000FF"
/>
</RelativeLayout>
this is the result:

How to hide all elements in a Layout in Android at once?

I'm developing an Android app in eclipse.
I have an XML which has 2 linear layouts next to each other. The left one has several buttons, which make content visible in the right. However, I would not only like these buttons to make specific content visible, but hide (setVisibility.GONE) all the other stuff in that layout. I have already tried removeAllViews, but this is not suitable for me since it deletes them. So my idea is to hide (set the visibility to gone) every single stuff, then make the ones I wish visible. The reason I ask this is that it takes too much time setting the visibility to gone for everything (24, actually) for all the 12 buttons.
Thanks in advance
Layout code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/alap"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ScrollView
android:id="#+id/scrollView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/imageView3"
android:layout_alignParentLeft="true"
android:layout_below="#+id/imageView4" >
<LinearLayout
android:layout_width="197dp"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/lewis" />
<Button
android:id="#+id/first"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/first" />
<Button
android:id="#+id/second"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/second" />
</LinearLayout>
</ScrollView>
<ImageView
android:id="#+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:scaleType="center"
android:src="#drawable/cpr1" />
<ImageView
android:id="#+id/imageView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:scaleType="center"
android:src="#drawable/epizodok" />
<LinearLayout
android:id="#+id/def"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/imageView3"
android:layout_alignParentRight="true"
android:layout_alignTop="#+id/scrollView2"
android:layout_toRightOf="#+id/scrollView2"
android:orientation="vertical"
android:visibility="visible" >
<ImageView
android:id="#+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/lewis"
android:visibility="gone" />
<ImageView
android:id="#+id/image2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher"
android:visibility="gone" />
</LinearLayout>
</RelativeLayout>

Please try this...
<LinearLayout
android:id="+id/ll"
android:layout_width="197dp"
android:layout_height="match_parent"
android:orientation="vertical" >
<!-- All content which you hide/show put here -->
</LinearLayout>
now in your class file you read this.
LinearLayout ll = (LinearLayout) findViewById(R.id.ll);
after that as per your requirement you hide/show this Layout with their all contents.
like:
For Hide.
ll.setVisibility(View.GONE);
For Show.
ll.setVisibility(View.VISIBLE);
when you hide/show LinearLayout all content with this Layout also hide/show automatically.

Simply, Just take another Linear Layout with vertical layout within your "def" Linear layout..Nd change its visibility as per your need.
<LinearLayout
android:id="#+id/def"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/imageView3"
android:layout_alignParentRight="true"
android:layout_alignTop="#+id/scrollView2"
android:layout_toRightOf="#+id/scrollView2"
android:orientation="vertical"
android:visibility="visible" >
<LinearLayout
android:id="#+id/Subdef"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/lewis"
android:visibility="gone" />
<ImageView
android:id="#+id/image2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher"
android:visibility="gone" />
</LinearLayout>
</LinearLayout>

No need to hide views instead of that just use ViewFlipper concept.
Just declare view flipper in your xml file with your two linearlayouts like this
<Viewflipper android:id="#+id/myViewFlipper" android:layout_height="wrap_content" android:layout_width="match_parent">
<LinearLayout android:id="#+id/layout1" android:layout_height="wrap_content" android:layout_width="match_parent"></LinearLayout>
<LinearLayout android:id="#+id/layout2" android:layout_height="wrap_content" android:layout_width="match_parent"></LinearLayout>
</Viewflipper>
And get viewflipper reference in your java code like this
Viewflipper mFlipper = (Viewflipper)findViewById(R.id.myViewFlipper);
use mFlipper.showNext(), use mFlipper.showPrevious() methods to hide and show your layouts thats it.

Is there a way to offset a view from center?

I'm trying to possition my button not exactly in center, but let's say in the 2/5s of the screen height, I was looking for attribute unsuccessfully, so I tried this approach
<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="#drawable/background"
android:padding="20dp" >
<ImageButton
android:id="#+id/flashlight_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_above="#+id/fakeView"
android:background="#null"
android:contentDescription="#string/flashlight_button_description"
android:src="#drawable/freeml_bright" />
<View
android:id="#+id/fakeView"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_centerInParent="true"
android:background="#FFAABB" />
</RelativeLayout>
However it does not work, even if I set margin on the fake view.
Padding attribute works, however as it is a big image and if I want it to start at 2/5ths of screen height, it covers the center point of screen, so if I use padding attribute it works but it pushes it away from center and does not allow it to cover it.
Alhough, I made it work using LinearLayout, which I wanted to avoid because there are more Views on top and bottom next to each other so it would lead to nested views using linear layout. Unfortunately I think its the only option.
It basically it uses another linear layout that fills the remaining space left unused by top and bottom views with height=0dp and weight=1 and sets its gravity to center.
<?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"
android:padding="20dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/application_logo_description"
android:src="#drawable/mylight" />
<ImageButton
android:id="#+id/settings_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:background="#null"
android:contentDescription="#string/settings_button_description"
android:src="#drawable/settings_button" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical" >
<ImageButton
android:id="#+id/flashlight_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#null"
android:contentDescription="#string/flashlight_button_description"
android:src="#drawable/flashlight_button_selector" />
<View
android:id="#+id/fakeView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="60dp"
android:background="#FFAABB" />
</LinearLayout>
<ImageView
android:id="#+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:contentDescription="#string/powered_by_description"
android:src="#drawable/powered_by" />
<ImageButton
android:id="#+id/ad_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:background="#null"
android:contentDescription="#string/ad_button_description"
android:src="#drawable/freeml" />
</LinearLayout>

Depending on the screen size of the target device, padding by X dp might move it more than just a fifth of the height.
You might have to code this movement yourself. However, nothing prevents you from doing:
<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="#drawable/background"
android:padding="20dp" >
<View
android:id="#+id/fakeView"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_centerInParent="true"
android:background="#FFAABB" />
<ImageButton
android:id="#+id/flashlight_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_above="#+id/fakeView"
android:marginBottom="50dp"
android:background="#null"
android:contentDescription="#string/flashlight_button_description"
android:src="#drawable/freeml_bright" />
</RelativeLayout>

Don't use margin, use padding (top), like so:
<View
android:id="#+id/fakeView"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_centerInParent="true"
android:paddingTop="80dp"
android:background="#FFAABB" />
That should work, though I've not tested it!

try using attribute android:layout_toLeftOf="#+id/fakeView"

Button on the left of a frame layout?

In a vertical linear layout, I have 2 textviews, then a button and then a frame layout.
I would like the button to be on the left of the frame layout. I tried putting the button in a relative layout, but how do I tell the frame layout to be on the right?
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#drawable/content_container_white"
android:orientation="vertical" >
<TextView
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="30dp"
android:text="#string/t0"
android:textColor="#color/black"
android:textSize="30dp" />
<TextView
android:id="#+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/t1"
android:textColor="#color/black" />
<RelativeLayout
android:id="#+id/RelativeLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/buybtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_marginLeft="30dp"
android:text="#string/buy_button" />
</RelativeLayout>
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|right"
android:layout_marginTop="10dp" >
<ImageButton
android:id="#+id/videothumb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:src="#drawable/button_play_on" />
<ImageView
android:id="#+id/videothumbimage"
android:layout_width="380dp"
android:layout_height="170dp"
android:scaleType="centerCrop"
android:src="#drawable/demo_thumb_home" />
</FrameLayout>
</LinearLayout>

You can do it by simply telling your FrameLayout android:layout_toRightOf="#+id/#+id/buybtn", but your FrameLayout must be inside a RelativeLayout too.
<RelativeLayout
android:id="#+id/RelativeLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/buybtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_marginLeft="30dp"
android:text="#string/buy_button" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|right"
android:layout_marginTop="10dp"
android:layout_toRightOf="#+id/#+id/buybtn" >
<ImageButton
android:id="#+id/videothumb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:src="#drawable/button_play_on" />
<ImageView
android:id="#+id/videothumbimage"
android:layout_width="380dp"
android:layout_height="170dp"
android:scaleType="centerCrop"
android:src="#drawable/demo_thumb_home" />
</FrameLayout>
</RelativeLayout>

Push FrameLayout into RelativeLayout or just put button and frame together in horizontal LinearLayout - what would be more simple
ps - kepp your code clean, use ctrl+shift+F (if using Eclipse) to auto-arrange it

Put your framelayout within Relativelayout and then set property align parent right.

The question makes no sense. From the documentation:
FrameLayout is designed to block out an area on the screen to display a single item.
Emphesis mine.
If you want your layout to contain more than one item, do not use a frame layout. Use something else.
Shachar