Develop Reference

ScrollView layout or its RelativeLayout parent is possibly useless

I'm developing an Android 4 and above application.
One layer generate this Warning:This ScrollView layout or its RelativeLayout parent is possibly useless; transfer the background attribute to the other view
<?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="fill_parent"
android:background="#000"
android:orientation="vertical" >
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="3dp" >
<WebView
android:id="#+id/about"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layerType="software" />
</ScrollView>
</RelativeLayout>
How can I solve this warning?

This error means that the RelativeLayout is useless, as it only contains one View (the ScrollView). You should make the ScrollView the parent, remembering to move the xmlns:android tag to the ScrollView, as well as the #000 background attribute. This will improve performance and should remove the error. Also remember that a ScrollView should only ever have one subview.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000"
android:layout_marginBottom="3dp" >
<WebView
android:id="#+id/about"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layerType="software" />
</ScrollView>

Usually, you'd want ScrollView on the outside, which allows you to scroll the content you have.
I think this is what you want:
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="3dp" >
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000"
android:orientation="vertical" >
<WebView
android:id="#+id/about"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layerType="software" />
</RelativeLayout>
</ScrollView>

If you really want to use relative or Linear layout you can use ahead of Scrollview provided after linear Layout you will have to use any control(Imageview,Imagebutton etc..) then it will not throw any warning/error.
Happy coding

Android: admob ad at wrong place

I am trying to position my ad banner at bottom of the screen. However, part of the ad is appearing at the top and other part at the bottom. Please take a look at the image below
wrong ad http://img513.imageshack.us/img513/4390/shot000025.png
Below is the code if that helps,
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/maingradient"
android:focusableInTouchMode="true"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/relativelayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/relativeLayout1" >
<ListView
android:id="#android:id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:cacheColorHint="#android:color/transparent"
android:divider="#00ff00"
android:fastScrollEnabled="true"
android:focusable="false"
android:listSelector="#000000"
android:paddingTop="5dp"
android:saveEnabled="true" >
</ListView>
</RelativeLayout>
<com.google.ads.AdView
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:id="#+id/adView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
ads:adSize="SMART_BANNER"
android:layout_alignParentBottom="true"
ads:adUnitId="a14fd64cddd4168"
ads:loadAdOnCreate="true" />
</RelativeLayout>
Can someone help please?
Thx!
Rahul.

Not sure what your exact problem is, but I see a few issues with your layout. First, you have a RelativeLayout nested inside another RelativeLayout, but are trying to place it below a third relative layout not contained in the parent? Also, the root RelativeLayout in your file has the android:orientation attribute, which is for LinearLayouts. It's all a bit confusing.
As for a solution, try making the root RelativeLayout a LinearLayout and keeping the vertical orientation. You can give your nested RelativeLayout a android:layout_height of 0dip and android:layout_weight of 1 (and get rid of the layout_below attribute, I'm not sure why it's there). This will put your ListView above the ad, and cause it to fill all the space not taken up by the Ad. Hope this helps.

try the following code
<?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="fill_parent"
android:background="#android:color/black" >
<com.google.ads.AdView
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:id="#+id/adView"
android:layout_width="fill_parent"
android:layout_height="50dp"
ads:adSize="SMART_BANNER"
android:layout_alignParentBottom="true"
ads:adUnitId="a14fd64cddd4168"
ads:loadAdOnCreate="true" />
<ListView
android:id="#+id/show_locations_list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#android:color/black"
android:layout_above="#+id/adView"
android:scrollbars="none"
android:scrollingCache="false" >
</ListView>
Hope it helps

how to separate layout in android

I not really sure how to describe correctly my problem. My layout contains a top menu with linearlayout, and below it is a tablelayout that is wrapped with a scrollview. My problem is when I scroll up, the content tablelayout moves up and blocks the top menu view. So could anyone know how to solve the problem please point me. Thanks
This is my code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/bg" >
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/menu_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="#drawable/menu_bar" >
</LinearLayout>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scrollbars="none" >
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/myTableLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="140dp"
android:stretchColumns="1" >
</TableLayout>
</ScrollView>
</RelativeLayout>

You have to set your ScrollView to be below your LinearLayout, else it stacks on it.
Hope this helps!

ListView taking up all space, when trying to use an Admob Adview in Android

I am trying to get Google Admob advertisements to display on the main screen of an app that consists of a ListView. Unfortunately, the ListView is taking up all of the space on the screen, and then the advertisement appears over the top of it. I have tried putting the ListView at the top, followed by an AdView, and I've also tried putting the AdView at the top, followed by the ListView, but nothing works.
If I set the size of the LinearLayout enclosing the ListView to a fixed height (eg, 200px) then it it limits the size and fixes the problem, but I don't want to do this, because screen heights of Android devices vary so much. Is there no way to tell the ListView to not take up all the space without setting a fixed size?
My code is below, I'd be grateful 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="fill_parent"
android:orientation="vertical">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:layout_alignParentTop="true"
android:id="#+id/ad_layout"
android:orientation="vertical"
android:gravity="top"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.google.ads.AdView android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adUnitId="AD_UNIT_ID"
ads:adSize="BANNER"
ads:loadAdOnCreate="true"/>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_alignParentBottom="true"
android:layout_below="#+id/ad_layout"
android:orientation="vertical"
android:gravity="bottom"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView android:id="#id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<TextView android:id="#+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/no_hosts"/>
</LinearLayout>
</RelativeLayout>

Both of your LinearLayouts have height of fill_parent. That means that they'll both be the full height of their parent. Clearly not what you want. Try this:
<?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">
<com.google.ads.AdView android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adUnitId="AD_UNIT_ID"
ads:adSize="BANNER"
ads:loadAdOnCreate="true"/>
<ListView android:id="#id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<TextView android:id="#+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/no_hosts"/>
</LinearLayout>

You have a relative layout. you need to set the listview property to layout_below="yourAdLayout" or rename the parent layout to linear layout. the orientation flag is not used in a relative layout, only in linear.

Adding Admob into ScrollView -> AdBanner disappears

Hey folks
I managed to implement Admob into a normal linear layout so far.
Now I added a additional scrollview and the adbanner disappeared. I don´t know what I can do against it.
Follows the code from the .xml where I added the scrollview:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/linearLayout"
android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="match_parent">
<ScrollView android:id="#+id/scrollView1" android:layout_height="wrap_content" android:layout_width="match_parent">
<LinearLayout android:id="#+id/linearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">
[whole bunch of layout elements whoch shouldn´t affect the adbanner]
</LinearLayout>
</ScrollView>
In my linear layout ,where the adbanner still works, the whole adbanner position was done in the main activitiy.java file (did this with help of the tutorial at taiic.com)
// Lookup R.layout.main
LinearLayout layout = (LinearLayout)findViewById(R.id.linearLayout);
// Create the adView
// Please replace MY_BANNER_UNIT_ID with your AdMob Publisher ID
String pubID = "xxxxxxxxxxxxxxxxxx";
AdView adView = new AdView(this, AdSize.BANNER, pubID);
// Add the adView to it
layout.addView(adView);
// Initiate a generic request to load it with an ad
AdRequest request = new AdRequest();
request.setTesting(true);
adView.loadAd(request);
Can anybody tell me what to change or what code to add when implementing an admob banner into a scrollview?
edit:
i tried to add
<com.admob.android.ads.AdView
android:id="#+id/ad"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
myapp:backgroundColor="#000000"
myapprimaryTextColor="#FFFFFF"
myapp:secondaryTextColor="#CCCCCC"
android:alignParentBottom="true"/>
between last two lines in the .xml
</LinearLayout>
[here]
</ScrollView>
but then im getting the error "error: Error parsing XML: unbound prefix"
cheers

About the parsing error:
Is this a typo in the question? myapprimaryTextColor="#FFFFFF" instead of myapp:primaryTextColor="#FFFFFF" . This would give you the xml parse error.
About the layouts:
Use a RelativeLayout. The working code is at the end of the post. First, some theory :)
Your ScrollView is taking the whole screen, that's why you don't see the admob view. When the scrollview is defined, all the screen is availabel to it, so it takes it. The admob view is actually drawn below your screen. It can be reproduced in this example:
non-working layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/linearLayout"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ScrollView android:id="#+id/scrollView1"
android:layout_height="wrap_content"
android:layout_width="fill_parent">
<LinearLayout android:id="#+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<EditText
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="Test1"
/>
<EditText
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="Test2"
/>
<EditText
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="Test3"
/>
</LinearLayout>
</ScrollView>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Test4"
/>
</LinearLayout>
If you use a RelativeLayout instead, you can set it up so the admob is aligned to the bottom of the screen, and the scrollview above it, taking the rest of the available space.
working layout
<?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="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Test4"
android:id="#+id/test4"
android:layout_alignParentBottom="true"
/>
<ScrollView android:id="#+id/scrollView1"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_above="#id/test4"
>
<LinearLayout android:id="#+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<EditText
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="Test1"
/>
<EditText
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="Test2"
/>
<EditText
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="Test3"
/>
</LinearLayout>
</ScrollView>
</RelativeLayout>

I used the admob xml version and that is what I use and it works. The ad is at the top. Just copy and paste and you will be scrolling along shortly.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res/com.yourproject.here"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.google.ads.AdView android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adUnitId="a14dc1c9d6xxxxx"
ads:adSize="BANNER" />
<ScrollView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true" >
[whole bunch of layout elements whoch shouldn´t affect the adbanner]
</ScrollView>
</LinearLayout>