i am learning 3d game development on android , i was wondering is it possible to add text areas or any thing that allows a user to enter a text in a 3d world ? and how ?
Your problem have a two part answer :
1 : First you have the problem of letting the user input some text. This can be easily done using the virtual keyboard available in Android. Something like this should do the trick.
Of course if you want something with your own look and feel you can create your own input service (look here for more info http://developer.android.com/resources/articles/creating-input-method.html)
2 : Then, you need to give the user some kind of feedback, meaning write the text the user is typing in 3D. To do this, the basic idea is to create one quad per character, and map it to a texture containing your font, and place the quads in 3D where you wan't them to be.
On android, there are many ways to read strings input:
About the second solution:
You can read my old tutorial with code and the phil hassey blogs about porting its game from IOS to Android.
we're talking about JNI (Java bridge with C) because our engines are C/C++ code...