I'm new to Android programming and I'm working on my first application "FunFacts" where
there should be more than 100 cool things to learn about nature, science etc.
My question is: How can I switch from one page to another using two buttons "left" and "right"? which method should I use? I don't think that a horizontal scrollview is the solution.
So if I have 2 different layouts, page one and page two, how can I switch from one to other in my application?
Thank you!
It sounds like you might want a ViewPager. Below is a link to the Android tutorial. This creates a slideshow type effect which sounds like what you're going for. You said you will have different layouts which this will use one layout but you can customize the content and I would think you would want one so it all looks relatively the same
Docs
Update
No, you don't have to create 100 layouts or activities. Just one of each. Following will be a link to a post that explains it a little better. That post explains how it is like a listview in that you add the different pages to your view adapter as you would with a list. You can use the same layout for all and just add new data to it (like a list). Probably store them in an ArrayList or possibly a DB if you have that many and want to have a lot of data attached to them. I hope this makes sense and helps a little. I would suggest starting one with just a couple pages to see how it works, following these examples, and if you get stuck then post a more specific question as to what you can't get to work.
Link
Related
I've been searching for a while now how to do some "Advance" lists like the facebook news feed and I don't think I am using the right keywords to search how to do that. I'm still quite new to android environment.
This is what I am trying to achieve:
How would I achieve a kind of list like that? Can I just do somekind of layout with a scrollbar and feed in some custom views? Do I need to do some kind of advance list?
Thank you for refering me to some useful information
For simplicity's sake, I would recommend maybe you should use a ScrollView nesting a Vertical LinearLayout and dynamically add all your child items in there.
I know...it's not the right way, but this is coming from a (somewhat) beginner's point of view here myself. (I've been coding all my life, but I was immediately not a fan of Lists and "Adapters" when I got into Android.)
So, if/when you need to search through/categorize/sort/manage your items I would suggest maybe using View.setTag() to store key information about each child, and either a) loop through all your child elements for deep searching, or b) use View.findViewsWithText() or findViewWithTag() for quick searching/categorizing.
It can get dirty pretty quick if you have to do extensive sorting, but in my head (and maybe yours) I would rather use what I know rather than learn what I don't know.
I didn't intend this to be an rock-solid answer, but it's a lot of info to cover in the comments.
Happy programming
I am new to Android programming, and I need some advice. I want to create an app that teaches children the alphabet and numbers. I want each letter to have their own screen which you can scroll to and from other letters, but each screen will be similar in that it will have the current letter, pictures of objects that start with that letter, and sounds corresponding with the letter and the objects in the background. Should I make one XML layout for these and somehow changed what letter and objects show up in on the layout using Java, make an XML layout per letter, or is there a way to create a base layout in Java and have all of the letters and numbers inherit these qualities and methods. If that is the case, would that require a Java class per letter as well? I am sorry if these seem like stupid questions, but most of my education in Android has come from internet video tutorials. I appreciate any and all help. Thank you for your help in advance!
v> I want each letter to have their own screen which you can scroll to and from other letters, but each screen will be similar
You probably want to check out ViewPager and Fragments for this.
This website usually seems to have pretty good tutorials. The docs and SO usually have good examples of getting started also.
Note These both require API >= 11 or using a compatibility package which you can find a tutorial Here. so that may be something to take into consideration. If that is an issue then you could simply have one layout with TextView, ImageView, etc... which retrieves its data from a DB and load them when a certain event happens such as a click.
Well, if you want a screen for each of the letters that you could swipe to, but each letter is going to have its own set of properties, I recommend you start looking for a ViewPager with custom Fragments. I think that is a good start. Then, you could focus on some other fancy features like sound.
I am trying to build an app in which I want to go to a new page through swipe-say. I have about 10 different pages and I want to go to these pages by swiping. Can I implement these pages as separate activities? Can I swipe from one activity to another? I strongly like to implement these pages in seperate xml files rather than creating everything in a single xml page. But as far as I have searched, there are no proper tutorials or blogs giving an appropriate example of a program implementing swipe. If possible, provide some working codes.
Thanks in advance.
It seems that a FragmentPager is what you want.
Examples and code on the linked page.
If you build for earlier versions of Android, the necessary code is included in the Android Support Package.
In Android, swipe is not identified as a particular gesture.
You can use a OnTouchListener registered on your view, and animate your view if the gesture exeeds a certain threshold.
You can then launch a new activity, or in a simpler way, use a viewFlipper.
Please try the attached link View flow.
I feel it will fit your needs perfectly. You can even create different xmls and inflate them into different view objects and then use the "view flow" to switch between them.
The "view flow" is perfect for handling both simple & complicated views. The flow indicator on the top of the screen is optional.
I hope it helps..
Ive looked into the ViewFlipper, but defining 40 different views in one XML doc just doesn't seem like a bright idea. I know there has to be a better way, I just don't know how. I have spent some time trying to find a answer with no good answer so far.
I have used the Gallery widget (admittedly quite heavily modified) to display 200 fullscreen images in an image viewer for a client.
Alternatively you could use a ViewAimator with either 2 (in this case ViewFlipper) or 3 views (3 if you want to preload both the next and previous images). If you go for this approach then Laurence beat me to suggesting this idea ;) However I'd add that you would want to extend the ViewAnimator/ViewFlipper class to allow it to accept some type of Adapter.
A simple approach would be to simply contain two ImageViews within the ViewFlipper. Then when you request the next or previous view, set the new image resource for the next view and flip.
If you implement a lazy loader using AsyncTask or a Handler this will stop your UI thread from blocking.
Hope this helps!
You could use a ViewPager (included in the Android compatibility library if you need to support pre-Honeycomb devices).
I want to create an activity, which shows a question with 4 answers, and at the bottom of the screen i want to place a timer.
I have already found timer example, and i created a question with the answers. the problem that they are 2 different projects and activities, and i am looking for the best way to implement it. i think i can't show 2 activities on one screen, but i can show 2 views or shell i use the ViewGroup, or maybe to copy-paste one of the activities code to another ( its the easiest way but probably the most ugliest way to implement it).
please tell me what is the best way, that i will study and not to waste time to study all the ways and only then to choose one of them.
welcome to StackOverflow.
You are correct in that you cannot display two activities at once. You must instead look into how layouts work in Android by reading some tutorials on the Android developer guide.
For your layout, I would recommend using a LinearLayout with four TextView objects inside it containing the questions (and perhaps your EditText objects below them) as well as your timer. Make sure they are all inside a ScrollView so the software keyboard doesn't force it all to be squeezed up. This is how I would approach it, but I encourage you to read about how layouts work and use the XML resources.
The Notepad tutorial is an excellent way to get started with views and text entry, as well as using SQLite databases.