I am working on a chat aaplication.In which i have to chat window through which i am sending message.
!![For this image i am using sending message.You can see in this window i have a showall button if a person talking with no one that on show all button i have to show nothing but if a person is talking with 1,2 or more then i have to show winodw like image2 given below.][1]!
![In case of image 1 when user click on image 1 showall button if there is going chatting then i have to show image like that if more than one person is chatting then image2 will show list of chat winodow as in image1 if click any of them then chat related to that winodow will be open. ][2]
As I said you need to check how to use TabHost in Android : here you can see how you can set TabHost in bottom of your page as in your attached screenshot.
Here is another tutorial how to use TabHost with icons and etc.
Check
RelativeLayoutwhich you will need to set done button at the bottom of your page : RelativeLayout. About the chat views which are in your screenshot you can useViewFlowto implement this kind of preview : Android ViewFlow.
Hope this information helps you. If you have any other questions, just ask : )