Develop Reference

how to make list views like google io 2014 app in android?

I want to create a list view layout with a image and title in it. I want a layout like listview in google io 2014 app. It should be a tiled listview with some colour till the image gets loaded, after the image is loaded it should be shown in the upper half of the listview and title should be shown below with some background colour. I am attaching the screenshot of google io app here.
Updated: If somebody can point me some template custom layout for this listview it would be helpful!

Create a custom list with all the needed controls in separate layout and inflate it using a custom adapter you can find a small example here
you could create a custom layout something like 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" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:background="#drawable/images"
android:layout_height="match_parent"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#862c10">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textSize="15sp"
android:layout_marginLeft="10dip"
android:textStyle="bold"
android:text="HTML5 everywhere how and why android users use the webplatform" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textSize="15sp"
android:layout_marginLeft="10dip"
android:layout_marginTop="10dip"
android:text="Wed 5 2001" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textSize="15sp"
android:layout_marginLeft="10dip"
android:layout_marginTop="10dip"
android:text="Steven roberts and mark robinson " />
</LinearLayout>
</LinearLayout>

(this should not be the answer, but forgive me I could not add a comment, and actually I hope this will give him the answer).
First of all I guess you didn't get on well with using ListView and Adapter in Android. So I suggest you to read the following article first:
ListView tutorial 1
ListView tutorial 2
They will teach you how to use xml to define your custom row view. Then you will know how to use George Thomas's xml. Try how to implement the getView() method.

Using RelativeLayout, LinearLayout and layout_weight at the same time - weird behaviour

I've got an activity layout specified in an XML file - activity_intro.xml - and I'm trying to create another one that is similar but slightly different - that's going to be activity_instructions.xml.
The Intro activity has a 9patch image at the bottom of the screen that is supposed to stay there and only adjust to different widths of the screens.
The Instructions activity is supposed to contain the same image but above 2 more buttons - all three of these views need to be always located at the bottom of the screen.
activity_intro.xml:
<?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" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#drawable/home_background" >
<LinearLayout
style="#style/Activity"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView
android:id="#+id/introAnimationImageView"
android:layout_width="152dip"
android:layout_height="176dip"
android:layout_gravity="center_horizontal"
android:contentDescription="#string/intro_animation_content_description"
android:src="#drawable/animation_intro01" />
<TextView
android:id="#+id/introTextViewTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/intro_title"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/introTextViewSubtitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/intro_subtitle"
android:textAppearance="?android:attr/textAppearanceMedium" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="#+id/introButtonLoginSignup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="#string/intro_button_label_login_signup" />
<Button
android:id="#+id/introButtonInstructions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_alignRight="#+id/introButtonLoginSignup"
android:text="#string/intro_button_label_instructions" />
<Button
android:id="#+id/introButtonReportAnonymously"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/introButtonLoginSignup"
android:layout_centerHorizontal="true"
android:text="#string/intro_button_label_report_anonymously" />
</RelativeLayout>
</LinearLayout>
</ScrollView>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:contentDescription="#null"
android:scaleType="fitXY"
android:src="#drawable/footer_cityscape" />
</LinearLayout>
Result:
Since I've got working code for Intro, I wanted to make Instructions follow its example but the layout_weight property isn't behaving as expected. First of all, I was only trying to put in the 2 buttons and leave out the image:
<?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" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="0.1"
android:background="#drawable/home_background" >
<LinearLayout
style="#style/Activity"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/instructionsTextViewTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/instructions_title_1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold" />
<ImageView
android:id="#+id/instructionsImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/instructions_image_content_description"
android:src="#drawable/forms" />
<TextView
android:id="#+id/instructionsTextViewDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/instructions_description_1"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
</ScrollView>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" >
<Button
android:id="#+id/instructionsButtonPrevious"
style="#style/ButtonPrevious"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:text="#string/instructions_button_label_previous" />
<Button
android:id="#+id/instructionsButtonNext"
style="#style/ButtonNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:text="#string/instructions_button_label_next" />
</RelativeLayout>
</LinearLayout>
This only worked when I set the layout_weight of the bottom RelativeLayout to 1 (instead of 0) and for the ScrollView 0.1 (instead of 1). If I used the original values the RelativeLayout would take up all the screen. Could anyone explain to me why that is?
I also tried googling the issue and noticed people would suggest to set layout_height to 0dip which I tried but it also didn't work as expected.
Secondly, I tried adding the already mentioned ImageView to the bottom RelativeLayout. This, however, basically displays only the ImageView and not the buttons - or one of the buttons is on top of the image (hiding it). Why is that? Don't I specifically set the buttons to be placed below it?
What should the code look like in order for it to be doing what I expect it?
Further explanation:
Below are images that should help indicate what exactly I want to achieve. The green bits are the ScrollViews - I added them because Android devices tend to have diverse screen sizes. Their purpose is to present the content properly independently of the screen size, i.e. if the screen is small, the user will be able to scroll that part to read the entire text and view the image.
The red bit on the left (Intro) shows the ImageView that is supposed to always be at the bottom of the screen; it'll always be there, visible, and it's the green bit above it that will be movable.
If you take a look at the red bit on the right (Instructions), there's a Next button that's covering the image with the lorry/truck that was visible in the Intro screenshot. Now that's wrong - there should be 2 buttons BELOW the image, as seen on the last screenshot (the 2 blue rectangles).

How to achieve gravity="center_vertical" in a RelativeLayout nested within a LinearLayout?

https://docs.google.com/document/d/1SDDnAG-jkQjC6F85iPgfv3Et1pYl8t03k-TkCN3YcCw/edit
I have an Android preference page containing a mixture of stock, and custom List Items. The custom list items "Mood" and "Mixed Mood" can be seen in the screen shot in the referenced Google Doc, and function in the following way. (The external link is because, without a reputation of at leat 10, I'm not allowed to post images in stackoverflow...)
1) Before a user has chosen a value, they simply display their title. (either Mood or MixedMood)
2) After a user has chosen a value, they display their title AND a custom tool tip (the little colored squares), indicating their choice.
THE PROBLEM: You can see from the screen shot that before a user has chosen a value, the "Mood" text is not centered. I would like for it to be centered, and then dynamically make room for the custom tool tip after a choice is made. In other words, I would like
<TextView android:id="#+android:id/title"
To respond to
android:gravity="center_vertical".
Is this possible?
My layout file looks like this.
<?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:minHeight="60dip"
android:gravity="center_vertical"
android:paddingRight="?android:attr/scrollbarSize">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layout_marginLeft="15dip"
android:layout_marginRight="6dip">
<TextView android:id="#+android:id/title"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="18sp"/>
<!-- This image represents the dropdown arrow -->
<ImageView
android:gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_toRightOf="#android:id/title"
android:scaleType="fitEnd"
android:src="#drawable/ic_btn_round_more_normal_cropped" />
<monarca_rct.client.customcomponents.MoodScalePresentation
android:id="#+android:id/hpmp_mood_scale"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#android:id/title"
android:paddingTop="4.0dp"/>
</RelativeLayout>
</LinearLayout>

If i get your question right:
You can set android:layout_alignWithParentIfMissing="true" in <TextView android:id="#+android:id/title" for more info visit http://developer.android.com/resources/articles/layout-tricks-efficiency.html

I can't exactly try this out but I think it might be something like this:
<?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:minHeight="60dip"
//REMOVED GRAVITY
android:paddingRight="?android:attr/scrollbarSize">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
//REMOVED GRAVITY
android:layout_marginLeft="15dip"
android:layout_marginRight="6dip">
<TextView android:id="#+android:id/title"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center_vertical|left"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="18sp"/>
<!-- This image represents the dropdown arrow -->
<ImageView
android:gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_toRightOf="#android:id/title"
android:scaleType="fitEnd"
android:src="#drawable/ic_btn_round_more_normal_cropped" />
<monarca_rct.client.customcomponents.MoodScalePresentation
android:id="#+android:id/hpmp_mood_scale"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#android:id/title"
android:paddingTop="4.0dp"/>
</RelativeLayout>
</LinearLayout>
The reason to go from center_vertical to center_vertical|left is because your parent layout is like a grid and you can "choose" your position. So if you have:
(1) (2) (3)
(4) (5) (6)
(7) (8) (9)
[Don't mind the white spaces between each line, for some reason if I don't do it like that it gets displayed all in one line.]
The 4 is where you want your text. As you can see, the 4 is on the left but also vertically centered hence the combination:
android:gravity="center_vertical|left"
Quick question, why do you need a RelativeLayout inside a LinearLayout? You could do without the LinearLayout altogether from the looks of it.

using Framelayout for making panel

Hello i am using following xml to create some sort of Transparent panel . The problem i am facing is that the background image ac zoom up , i mean its height get increase , the other thing i would like to know how can i bring this frame in the middle and adjust its width . I have followed this example
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="center"
android:src="#drawable/ac" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="20dip"
android:layout_gravity="center_horizontal|bottom"
android:padding="12dip"
android:background="#AA000000"
android:textColor="#ffffffff"
android:text="test test test" />
</FrameLayout>

For your ImageView have a look at ScaleType
Try:
android:scaleType="fitXY"
If you want to center your Views have a look at Layout Gravity

Align dynamic Image and Text in Android

I have a header where I have the text: "Huidige Locatie" and beneath that I have an image of a country flag.
I declared the TextView and ImageView in the layout as follows:
<LinearLayout
android:id="#+id/locatiebalk"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingTop="5sp"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/vlaggenlocatie"
android:layout_width="105sp"
android:layout_height="fill_parent"
android:paddingLeft="14sp"
android:orientation="vertical">
<TextView
android:id="#+id/huidiglocatie"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Huidige locatie"
android:textColor="#000000"
android:textSize="12sp"/>
<ImageView
android:id="#+id/flag"
android:layout_width="fill_parent"
android:layout_height="46sp"
android:gravity="left"
android:src="#drawable/nl"/>
</LinearLayout>
(I close the tags correctly later on, just showing the relevant part)
In the Graphical Layout of Eclipse it shows it the right way:
But in the Simulator and on my phone it showes it like this:
What is the best way to do this?

Fixed it.
For the ones wondering: android:scaleType="fitStart" did the job.