Develop Reference

android:tabStripEnabled="false" doesn't work

I was using tabhost and trying to disable the tab border line. I used this android:tabStripEnabled="false"
in my XML but it doesn't seem to be working, the line was still there, and I try other way like making changes in the style.xml(which I found from stackoverflow) but it doesn't work either. Any idea?
my tab xml:
<?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" >
<TabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="#android:id/tabs" />
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#FFFFFF"
android:tabStripEnabled="false"
android:layout_gravity="bottom" />
</RelativeLayout>
</TabHost>
</LinearLayout>

You can remove the bottom strip of tabs and divider between tabs by using following statement.
TabHost t;
t.getTabWidget().setStripEnabled(false);
t.getTabWidget().setDividerDrawable(R.drawable.ic_launcher);

It requires minSDK 8 (2.2) at least... Review your manifest.
Be sure that there insn't a line, in your code, setting tab's background (I had this problem ...) ;)

Android Layout - Image taking up extra space

I've added an image to my xml file. This is the code that I am using:
<?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" >
<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="#drawable/topbar_logo2x"
android:scaleType="fitStart" />
<TabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<View
android:layout_width="fill_parent"
android:layout_height="0.5dip"
android:background="#000" />
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="0dip"
android:layout_marginRight="0dip" />
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
</TabHost>
</LinearLayout>
I want my TabHost to be exactly on top of my image. When I checked up some answers in StackOverflow, I got an answer that stated to use
android:scaleType="fitStart"
I want to use both android:scaleType="fitStart" and android:scaleType="fitEnd" on the same ImageView and that is not possible as Sndroid will allow only one declaration of scaleType. How will I be able to attain the same with change in code ? Is there some other command that will help me?

Seems to me the larger black line must come from the image (topbar_logo2x) or the way it is scaled into the ImageView. Try using scaleType="fitXY" to see if the above black line vanishes. If not, then post the image for us to look.
Seems to me the View below LinearLayout causes the smaller black line. Remove it.

Android tabcontent contains scrollview which hides content behind tabs

I have a layout which contains a Tabhost. The tabs are at the bottom of the screen. The first tab starts an ActivityGroup. The first activity in that ActivityGroup contains a scrollview. When the contents are displayed in the scrollview and you scroll all the way down, the bottom of the scrollview is hidden behind the tabs. Any ideas how to fix this?
When I start the activitygroup, I use this code:
Window window = getLocalActivityManager().startActivity(pActivityClass.getName(), intent);
setContentView(window.getDecorView());
Is the decor view the entire screen? I just want the view to be the tabcontent.
Here is the main layout:
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_alignParentTop="true"/>
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
</TabHost>
Here is the view I want in the tabcontent:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/myScrollView"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<RelativeLayout android:id="#+id/myLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView android:id="#+id/title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="16sp"/>
... a bunch of other components ...
</RelativeLayout>
</ScrollView>

Fix your layout so the content view fits above the tab widget, instead of filling the entire parent container, which tells it to lay out as the full size of the RelativeLayout and then lay the TabWidget on top. Something more like this:
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="#android:id/tabs"/>
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
</TabHost>
I also removed some of the unnecessary items like android:orientation which does nothing inside of a RelativeLayout.
HTH

Optimal result.
android:minWidth= Increase the value of...
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<HorizontalScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
android:scrollbars="none" >
<TabWidget
**android:minWidth="480dp"**
android:id="#android:id/tabs"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</TabWidget>
</HorizontalScrollView>
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
</TabHost>

<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="#android:id/tabs"/>
Here, the key line is,
android:layout_above="#android:id/tabs"

I know there might be a "correct" way to do this, but I just added
<LinearLayout android:layout_width="fill_parent"
android:layout_height="50dp"></LinearLayout>
to the bottom of the xml file I was loading into the tab.
Also user1060374 is right the FrameLayout needs to be above the Tabwidget or the scrollview will hide(be on top of) the tabbar if the contents needs scrolled.
But just doing this won't answer your question, so I added the padding.

Linear layout inside TabHost only showing one element

I have this layout file in my android application:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
<TextView
android:id="#+id/textview1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is a tab" />
<TextView
android:id="#+id/textview2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is another tab" />
<LinearLayout
android:id="#+id/layoutSearch"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<TextView
android:id="#+id/textview4"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="Search here" />
<EditText
android:id="#+id/editSearch"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</FrameLayout>
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"/>
</LinearLayout>
</TabHost>
My problem is that LinearLayout android:id="#+id/layoutSearch" shows only one of the elements it contains (the text view, in the code above) If I remove the textview, it shows the EditText.
How do I make it display both (and more) elements?

There's a lot of excess layout there, but it looks like the real issue is that layoutSearch is a vertical LinearLayout with two children, but the first child's height is set to fill_parent, so you naturally never see the second one. Try setting its height to 0px but giving it a layout_weight of 1, and it should expand to take all the available space not taken by the EditText below it.

TabHost NullPointerException in layout

I been following the Tab example provided by Google. I am trying to use the XML layout provided to setup a tab layout.
I use this XML layout # http://developer.android.com/guide/tutorials/views/hello-tabwidget.html
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/textview1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is a tab" />
<TextView
android:id="#+id/textview2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is another tab" />
<TextView
android:id="#+id/textview3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="this is a third tab" />
</FrameLayout>
</LinearLayout>
</TabHost>
When ever I switch the Layout tab in the Eclipse layout designer I get a NullPointerException: null error inside my Eclipse.
This happens also when I try to drag and drop a TabHost, and then a TabWidget into an empty layout file.
What am I doing wrong ? this seems pretty simple.

Found it has been recorded as an issue already
http://code.google.com/p/android/issues/detail?id=2021
Thanks anyway