Develop Reference

Android: In relativelayout Listview disappears when I try to align it above a linear layout

I'm trying to make a page with a listview that has some textviews and buttons beneath. I don't want it anchored at the bottom unless it would be pushed off otherwise. I was thinking of trying a relative layout with the listview aligned above a linearlayout but for some reason it doesn't show up at all
Code is
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/feet">
</ListView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#id/feet"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/total"
android:textSize="32sp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/funds"
android:textSize="32sp"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/buy"
android:id="#+id/buyB"
android:textSize="32sp"
android:onClick="confirmTrans"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/cancel"
android:id="#+id/canc"
android:textSize="32sp"
android:onClick="cancelTrans"
/>
</LinearLayout>
</RelativeLayout>

That's because by default a RelativeLayout positions its elements at the top-right. You will need to add a property to your LinearLayout such as
android:layout_alignParentBottom="true"
Right now, your LinearLayout will be positioned at the top-right and your ListView above that which there is no more room in the window for the ListView to go above the LinearLayout.

If you have such problem in ListView make sure that you use proper inflation method. Parent view group must be specified for correct inflation.
mLayoutInflater.inflate(R.layout.listitem, parent, false);
Instead of
mLayoutInflater.inflate(R.layout.listitem, null);

Align Relative Layout at bottom of Linear Layout in Parent

I have Linear Layout which acts as the parent of a Relative layout.The Relative layout consists of some buttons and stuff.I want to align the relative layout(panel containing buttons) at the bottom of the linear layout.The linear layout only consists of an ImageView and after that the relative layout should be aligned at the bottom.
But when i try to set android:layout_alignParentBottom="true" in the Relative Layout the IDE Prompts code is wrong.How can i achieve this please help
<?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:gravity="center_horizontal"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="250dp"
android:scaleType="fitStart"
android:src="#drawable/jellyfish" />
<RelativeLayout
android:layout_width="318dp"
android:layout_height="164dp"
android:layout_margin="5dp"
android:background="#drawable/backgrad"
android:orientation="vertical" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="20dp"
android:layout_marginLeft="34dp"
android:onClick="clickme"
android:text="Button" />
<ImageButton
android:id="#+id/imageButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="16dp"
android:layout_toLeftOf="#+id/button1"
android:onClick="textclick"
android:src="#drawable/text" />
<Button
android:id="#+id/button2"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/button1"
android:layout_alignBottom="#+id/button1"
android:layout_centerHorizontal="true"
android:onClick="wmark"
android:text="Save" />
</RelativeLayout>
</LinearLayout>

Possible duplicate : How to achieve alignParentBottom="true" property in LinearLayout
When you set android:layout_alignParentBottom="true", you are trying to use methods of the LinearLayout. But LinearLayout DO NOT provide alignParentBottom.
The answer in the duplicate says to replace
android:layout_alignParentBottom="true"
by
android:gravity="bottom"

Add the following to your parent linear layout xml:
android:gravity="bottom"

I have answered another topic like this, solution is to put a View with weight 1 above your relative layout like this:
<View android:id="#+id/emptySpace"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
/>

Try Enclosing your ImageView in a Linear Layout and add
android:layout_alignParentBottom="true"
in your Relative Layout.

Android ExpandableListAdapter View layout not displaying as desired :-(

I have an XML layout for a view representing one item as displayed by a ExpandableListAdapter. (The XML that is duplicated once for each list item, not the main activity layout). I initially tried a LinearLayout but this hid the final of the three widgets (a image button). I understand why that doesn't work but I then tried a RelativeLayout but the text view does not show.
I'll display the relative layout first along with a screenshot and also append my initial layout and screenshot at the bottom FWIW. Thanks for any help.
<?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="55dip"
android:orientation="horizontal" >
<CheckBox
android:id="#+id/chkParent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:checked="false"/>
<EditText
android:id="#+id/edtParent"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="#id/chkParent"
android:textSize="17dip"
android:inputType="text"
android:hint="#string/strItem"/>
<ImageButton
android:id="#+id/btnExpand"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:layout_toLeftOf="#id/edtParent"
android:src="#drawable/dark_expand"
android:clickable="true"
android:hint="#string/strViewSubItems"
android:contentDescription="#string/strViewSubItems"
android:background="#null"/>
</RelativeLayout>
Original linear layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="55dip"
android:orientation="horizontal" >
<CheckBox
android:id="#+id/chkParent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"/>
<EditText
android:id="#+id/edtParent"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="17dip"
android:inputType="text"
android:hint="#string/strItem"/>
<ImageButton
android:id="#+id/btnExpand"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="#drawable/dark_expand"
android:clickable="true"
android:hint="#string/strViewSubItems"
android:contentDescription="#string/strViewSubItems"
android:background="#null"/>
</LinearLayout>

Pretty sure your toLeftOf attributes should be toRightOf attributes. Give that a shot and see what happens.
Actually, your EditText should be set toRightOf="#id/chkParent" and toLeftOf="#id/btnExpand. Your ImageButton doesn't even need the toRightOf modifier, the alignParentRight attribute should cover it.

layout_centerHorizontal is not centering

I have a relative layout, and inside it i place 3 items, 2 imageviews and one scrollview.
My layout is 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="fill_parent"
android:layout_gravity="center"
android:gravity="center"
android:orientation="horizontal"
android:baselineAligned="true"
android:background="#drawable/background">
<RelativeLayout
android:id="#+id/logosLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_weight="1"
android:layout_margin="16dp"
android:gravity="center">
<!-- An image will be placed here -->
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_weight="1"
android:background="#33ffffff"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="#drawable/up" />
<ScrollView
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_margin="8dp"
android:fadingEdgeLength="32dp"
android:scrollbars="none" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<ImageButton
android:id="#+id/hotelBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:background="#drawable/button_background"
android:contentDescription="#string/hotelBtnDesc"
android:gravity="center"
android:src="#drawable/icon1" />
<TextView
android:id="#+id/hotelBtnDescTxtVw"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:gravity="center"
android:text="#string/hotelBtnDesc"
android:textColor="#ffffff"
android:textSize="14sp" />
<!-- more scrollview items -->
</LinearLayout>
</ScrollView>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:src="#drawable/down" />
</RelativeLayout>
</LinearLayout>
The above code produces the view shown here:
You may note that the arrows are not aligned in the center, but are slightly moved to the right. Why is that, and how can I fix it ? Note that i have already used android:layout_centerHorizontal="true" to my imageviews.
Thank you in advance

Its problem with your
android:layout_margin="8dp"
remove it from both scrollview and imageView
and pass it to RelativeLayout direct.
or add
android:layout_marginTop="8dip"
android:layout_marginBottom="8dip"
in your RelativeLayout.
and pass
android:layout_centerHorizontal="true"
to your scrollview

they are aligned to the center if you put the marginRight into consideration, try adding android:layout_margin="8dp" to the arrows.

u need to set image view that is under the Relative layout set this image view width fill parent.

Try removing android:layout_weight="1" from your RelativeLayout and see if it works.
In your LinearLayout, the attribute android:orientation="horizontal" causing your display to be aligned horizontaly. Therefore your RelativeLayout is in center but since its shared with another layout thats why you cant note the difference. If you completely remove the first RelativeLayout (the one with id logosLayout) then i hope you'll see the second layout in center.
So, first you need to define the hierarchy of layout you require and then adjust your views accordingly.

It seems problem with your android:layout_margin="8dp" for your scrollview only and pass it to RelativeLayout direct but instead of using margin use padding = "8dp".

display the elments in grid view in only one row

I want to display the grid view elements in only one row that means i want horizontal scrolling in grid view.Each time i want to display only 5 elements only in one row.For this give me some suggestions.Thanks in advance.
below is the my layout code
<?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"
>
<ImageView
android:id="#+id/ImageViewlarge"
android:layout_width="wrap_content" android:layout_height="wrap_content">
</ImageView>
<TextView
android:id="#+id/TextViewImageName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:editable="false">
</TextView>
<LinearLayout
android:layout_width="fill_parent"
android:orientation="horizontal"
android:gravity="bottom" android:layout_height="fill_parent">
<ImageView
android:id="#+id/ImageViewLeft"
android:clickable="true"
android:focusable="true"
android:layout_alignParentLeft="true"
android:src="#drawable/leftarrow" android:layout_height="50sp" android:layout_width="30sp" android:layout_gravity="bottom|left">
</ImageView>
<GridView
android:id="#+id/GridView01"
android:scrollbars="horizontal"
android:layout_height="wrap_content"
android:fadingEdge="horizontal"
android:scrollbarAlwaysDrawHorizontalTrack="true"
android:scrollbarAlwaysDrawVerticalTrack="false"
android:numColumns="5" android:layout_gravity="center_horizontal" android:layout_width="260sp">
</GridView>
<ImageView
android:id="#+id/ImageViewRight"
android:clickable="true"
android:focusable="true"
android:src="#drawable/rightarrow" android:layout_width="30sp" android:layout_height="50sp" android:layout_gravity="right"/>
</LinearLayout>
</LinearLayout>
in that above code now i want to remove the that 2 image view and set the horizontal scroll to that grid view elements.For this give me some suggestions,Thanks in advance

I believe the same effect could be achieved by using a LinearLayout with the orientation set to horizontal. The LinearLayout can be embedded in a HorizontalScrollView
The documentation on HorizontalScrollView actually says this:
A HorizontalScrollView is a
FrameLayout, meaning you should place
one child in it containing the entire
contents to scroll; this child may
itself be a layout manager with a
complex hierarchy of objects. A child
that is often used is a LinearLayout
in a horizontal orientation,
presenting a horizontal array of
top-level items that the user can
scroll through.