Develop Reference

Android Gallery Full SIze

I am trying to implement scroll type gallery for my app.(Just like the full size image browser we get on default android gallery.)
What I am getting
instead I want the gallery image to be displayed on the entire screen.
main.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"
android:background="#android:color/white"
android:orientation="vertical" >
<ImageView
android:id="#+id/left_arrow_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="15dip"
android:src="#drawable/arrow_left_disabled" />
<Gallery
android:id="#+id/gallery"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dip"
android:layout_toLeftOf="#+id/right_arrow_imageview"
android:layout_toRightOf="#+id/left_arrow_imageview"
android:scaleType="fitXY"
android:spacing="20dip" />
<ImageView
android:id="#+id/right_arrow_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="15dip"
android:src="#drawable/arrow_right_enabled" />
</RelativeLayout>

Try to set the main relative layout to fill_parent and the ImageView to match_parent.

Listview issue with item background

I've got problem with my ListView item's background, it's bigger than should be.
Here is my background resource:
And it's screenshot from my device:
Layout:
<?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"
android:background="#drawable/bg_nocar">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="50dp"
android:layout_marginLeft="6.67dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/reservation"
android:textStyle="bold"
style="#style/reservation_text" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/reservation.1"
style="#style/reservation_text" />
</LinearLayout>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/reservation.selectclass"
style="#style/reservation_selectclass_text"
android:layout_marginTop="33.33dp"
android:layout_marginLeft="6.67dp" />
<ListView
android:id="#id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#00000000"
android:dividerHeight="0.67dp" />
</LinearLayout>
That's my item layout:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/reservation_row"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/car_bg"
android:orientation="horizontal">
<LinearLayout
android:layout_width="93.33dp"
android:layout_height="98.67dp"
android:orientation="vertical"
android:layout_marginLeft="6.67dp"
android:layout_marginTop="13.33dp">
<TextView
android:id="#+id/classname"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
style="#style/reservation_classname" />
<TextView
android:id="#+id/name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
style="#style/reservation_name"
android:layout_marginTop="16.67dp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="98.67dp"
android:orientation="vertical"
android:layout_marginLeft="6.67dp"
android:layout_marginTop="13.33dp">
<ImageView
android:id="#+id/img"
android:layout_width="150dp"
android:layout_height="93.33dp"
android:layout_marginTop="6dp" />
<TextView
android:id="#+id/price"
android:layout_width="30dp"
android:layout_height="20dp"/>
<TextView
android:id="#+id/item"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
</LinearLayout>
</LinearLayout>
Why the background is so big?

Since you dont want your image to scale to the dimensions of the list item, you should not put it as a background.
Instead you can do this. Let the background be white (since your car_bg resource is all white with one logo). Then, your listview layout can look like this:
<RelativeLayout> //background white
<ImageView> //Your car_bg with width and height set as wrap_content
<LinearLayout> //All the content that you previously had
</RelativeLayout>
This way your image will not get scaled and remain as the original one. That said, you must now take car of different screen dimensions yourself. You must have different densitiy images available for your car_bg resource.

Try scaling the ImageView to keep its aspect ratio instead of attempting to set its height/width manually. This is most likely why your ImageView appears to be stretched.

List and image in the same ScrollView

I'm trying to get an image and a list in the same 'scroll' (I don't know how else to put it). My basic (vertical) layout is:
TextView
ImageView
ListView
I'm trying to get the scrolling as if the image is a list item itself. So the textview has to stay in place at the top and everything else has to scroll under it.
At the moment I have the following 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="fill_parent"
android:background="#color/background"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#color/app_purple"
android:orientation="vertical" >
<TextView
android:id="#+id/about_app_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:padding="15dp"
android:text="#string/about_app_label"
android:textColor="#color/background"
android:textSize="20dp"
android:textStyle="bold" />
<ImageView
android:id="#+id/app_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="#drawable/logo" />
</LinearLayout>
<ListView
android:id="#+id/information_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#color/background"
android:divider="#drawable/listdivider"
android:dividerHeight="1dp"
android:fadingEdge="none" >
<!-- Preview: listitem=#layout/row -->
</ListView>
Any help would be greatly appreciated!
EDIT
The custom row layout for the listView:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#color/listview"
android:orientation="horizontal"
android:padding="4dip" >
<ImageView
android:id="#+id/list_icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:adjustViewBounds="true"
android:layout_marginRight="5dp"
android:contentDescription="#string/icon_content_description" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/list_label"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:maxLines="1"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:textColor="#color/result_label"
android:textStyle="bold" />
<TextView
android:id="#+id/list_count"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/list_label"
android:ellipsize="end"
android:gravity="center_vertical"
android:maxLines="1"
android:textColor="#color/text" />
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/list_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:textColor="#color/text"
android:textColorLink="#color/app_purple" />
<ProgressBar
android:id="#+id/list_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:gravity="center_vertical"
android:visibility="gone" />
</RelativeLayout>
</LinearLayout>

You would have a vertical LinearLayout holding the fixed TextView and the ListView. Your ImageView would be a header on the ListView, added via addHeaderView(). Headers, despite their name, scroll with the contents of the ListView.

to make custom list views you need to create a single_list_item.xml file to arrange everything you want to scroll for example the image with a description text next to it. Also you need to add a ListView on your Xml file so the program can process the view. And them, you can process everything on your java file using an adapter. and the the list will appear at the bottom of the text.
There is a great example of how to do it here

it's not clear what exactly are you trying to do. ScrolView can have only ONE child. so I guess you should put the ImageView and the Listview in a LinearLayout.
but any way - it's a bad idea to put a Listview inside a ScrollView - how would the OS now what are you trying to scroll? the ListItem or the whole list. if you can be more specific - I can try help more...

Relative Layout is causing issues with formatting

I have been working on an app for my school recently and wanted to clean it up a bit before possibly publishing it. On the scheduling portion of the app, I have 5 buttons that perform actions on a ListView that is also on the screen at the same time. However, I have the issue when I have around 6 or more events on the screen as once the list view takes over the screen and pushes the buttons off the screen, making it so that I cannot delete the events, make new ones, and so on.
I tried setting the list view to a static size (400px) which worked for normal screen orientation, but if the phone is set to landscape view you cannot see the buttons either. With my current code it would appear to work in the XML viewer but in practice is not the case.
This is the code without the static size setting:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#551A8B"
android:textColor="#FFD700"
>
<Button android:text="#string/New"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="#+id/button3">
</Button>
<Button android:text="#string/Edit"
android:id="#+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/button3"
android:layout_alignTop="#id/button3">
</Button>
<Button android:text="#string/delete"
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/button4"
android:layout_alignTop="#id/button4">
</Button>
<Button android:layout_height="wrap_content"
android:id="#+id/button7"
android:layout_width="wrap_content"
android:text="#string/Previousweek"
android:layout_below="#id/button3">
</Button>
<Button android:layout_height="wrap_content"
android:id="#+id/button6"
android:layout_width="wrap_content"
android:text="#string/Next"
android:layout_below = "#id/button3"
android:layout_toRightOf = "#id/button7">
</Button>
<ListView android:id="#+id/listView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textColor="#FFD700"
android:layout_below="#id/button7"
android:textSize="10sp" >
</ListView>
</RelativeLayout>
The XML viewer for this code is:
Which would lead me to believe it would work fine. I tested it on my emulator and got the following result after entering a bunch of silly events however:
This result is consistent with multiple versions of the emulator.
How I can fix this problem without using static size constraints that cause landscape orientation issues?

Separate the buttons into a separate RelativeLayout and enclose this and the ListView in a vertical LinearLayout.
Then:
<LinearLayout android:id="#+id/linearLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<RelativeLayout [...]
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<!-- Your buttons -->
</RelativeLayout>
<ListView android:id="#+id/listView1"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1" />
</LinearLayout
The key point here is the height and weight on the ListView. This means that it fills the remaining space in the LinearLayout after space has been correctly allocated for the buttons.

Add a android:weigth in your listView tag and set the android:weigth value to 1. This will work when your list view height and width is set to fill_parent and your list view is covering entire layout. So try it, it will work.

One simple solution would be to separate the buttons in their own relative layout and put the whole thing in a linear layout, eg:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#551A8B"
android:textColor="#FFD700">
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#551A8B"
android:textColor="#FFD700">
<!-- your buttons -->
</RelativeLayout>
<ListView
android:id="#+id/listView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textColor="#FFD700"
android:layout_below="#id/button7"
android:textSize="10sp">
</ListView>
</LinearLayout>

Use a vertical LinearLayout with two rows of Buttons (each row as a LinearLayout), then give the ListView a layout_weight value of "1". In fact, use layout_weight to clean up the size of your buttons too.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<Button android:text="#string/New"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_weight="1"
android:id="#+id/button3" />
<Button android:text="#string/Edit"
android:id="#+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
<Button android:text="#string/Delete"
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<Button android:layout_height="wrap_content"
android:id="#+id/button7"
android:layout_width="wrap_content"
android:layout_weight="1"
android:text="#string/Previousweek" />
<Button android:layout_height="wrap_content"
android:id="#+id/button6"
android:layout_width="wrap_content"
android:layout_weight="1"
android:text="#string/Next" />
</LinearLayout>
<ListView android:id="#+id/listView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:textColor="#FFD700"
android:textSize="10sp" >
</ListView>

How to avoid space between imageview and gridview in linearlayout

I have a image view and grid view in my .xml file. When I am executing this file its getting some space between grid view and image view. How to avoid this space...can any one help me to solve this problem.
thanks in advance...
my xml code is:
android:layout_width="0px"
android:layout_height="0px">
</Button>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/prevMonth"
android:src="#drawable/cal_left_arrow_off2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
<Button
android:id="#+id/currentMonth"
android:layout_weight="0.6"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="#drawable/calendar_bar2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</Button>
<ImageView
android:id="#+id/nextMonth"
android:src="#drawable/cal_right_arrow_off2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
</LinearLayout>
<LinearLayout
android:layout_gravity="bottom|center_horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/calendarheader"
android:src="#drawable/blue_bg_with_text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
</ImageView>
</LinearLayout>
<GridView
android:id="#+id/calendar"
android:numColumns="7"
android:layout_gravity="top"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</GridView>

You should try setting the android:gravity attribute correctly, and it has to work:
<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:gravity="bottom|center_horizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content">
<ImageView android:id="#+id/calendarheader" android:src="#color/blue_start"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:minWidth="250dp" android:minHeight="30dp">
</ImageView>
</LinearLayout>
<GridView android:id="#+id/calendar" android:numColumns="7"
android:layout_gravity="top"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:background="#color/blue_start">
</GridView>
</LinearLayout>
i'm using here simple color background, and there is no gap:
If you still having the problem, then you should see your blue_bg_with_text2 image, whether it has any empty pixels at the bottom.
ps: ignore the android:minWidth="250dp" android:minHeight="30dp" part, it is there to imitate an image with that size.
Update
Here is the same view using RelativeLayout (it's a bit clearer at least for me):
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:id="#+id/selectedDayMonthYear"
android:textColor="#000000" android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="0px" android:layout_height="0px" />
<ImageView android:id="#+id/prevMonth" android:src="#drawable/cal_left_arrow_off2"
android:layout_width="wrap_content" android:layout_height="wrap_content" />
<ImageView android:id="#+id/nextMonth" android:src="#drawable/cal_right_arrow_off2"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_alignParentRight="true" />
<Button android:id="#+id/currentMonth" android:layout_weight="0.6"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="#drawable/calendar_bar2" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/prevMonth"
android:layout_toLeftOf="#id/nextMonth"
android:layout_alignBottom="#id/prevMonth"
android:layout_alignTop="#id/prevMonth" />
<ImageView android:id="#+id/calendarheader" android:src="#drawable/calendarheader"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="25dp"
android:layout_centerInParent="true"
android:layout_below="#id/currentMonth"
android:layout_margin="0dp"
android:scaleType="fitXY" />
<GridView android:id="#+id/calendar" android:numColumns="7"
android:layout_gravity="top" android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/calendarheader"
android:layout_margin="0dp"
android:background="#color/white_fader_end">
</GridView>
</RelativeLayout>
I've added to it my resources as background (two of them are actually screenshots from yours).
What i observed is, you must
either use a static image for your
calendar header background, or,
if you use an xml drawable, you have
to drop the stroke element from it / set its android:width to 0
otherwise it will add an unnecessary gap around your view's drawable, that is as wide as the stroke width you've specified.
my output using static images as backgrounds looks this way:
Update 2
The problem is not between your calendar header and gridView, but inside your gridView.
It has a 'padding' of 5 px inside (not real padding, see how it gets there):
The default selector for the GridView is a 9x9 patch rectangle with a border of 5px.
That 5 px is visible all around your gridView.
You can specify a different listSelector for this grid either by xml:
android:listSelector="#drawable/grid_selector"
or from code (onCreate):
gridView.setSelector(R.drawable.grid_selector);
Now if your grid_selector is an image or is a drawable xml without any margins, then the gap that causes the problem is gone.
You can also hide that gap, by setting a background color to your gridView, that matches or grandients the calendar header's background color.