Develop Reference

Use own image as map and mark places using x,y coordinates in android

I need to use my own image as a map and place markers (or a small flag-image) dynamically on the map at different positions (x,y coordinates or l,t,r,b parameters) on the map based on certain criteria. I am having problems implementing it with 'ImageView', 'ImageMap' & 'Drawable' and have searched all questions on stackoverflow. Any help would be appreciated.

I did something similar to this for my very first app. Inside of my activity, I created a custom View class, where I overrode the onDraw method and drew my map image, flags, etc. This is the tutorial I used, I recommend you check it out: Anddev.org (you may not need to implement scrolling, but the rest of it should be relevant).
Alternatively, you can use the Google Maps API to display their map with Overlays but it doesn't sound like that's what you're looking to do.

You have to user Overlays for displaying images on a map. A very good tutorial is given in the official docs.

Add a layer or a background on a mapView

I have a particular need with a mapView and i can't find any good solution.
I have a Mapview with some markers displayed on it, and it works perfectly.
My need is that i want to put a kind of layer/background on the screen, in order to "mask" the map, but i always want to see the markers, and keep all the mapview functionnalities (zoom, move, etc.)
Is there any solution available to do it?
I hope you understand my need.
Many thanks in advance.

Create an overlay that mask (cover) the part of the map that you want to cover. In the onDraw() of this oevrlay just draw something that achive your mask requirements (areas, colors and opacity).
To ensure that markers are always visible, you need to add the overlay with markers after you add the overlay that mask map to the mapView.getOverlays.add().
Enjoy it.

How to draw polygon overlay on Google-Maps in Android? and add the button like this?

I need to finish my thesis.
I want to make like an GIS on my android.
All I need is build android application that can show the map, draw polygon overlay on it, add house button in it, and save as an image.
I'd already know how to show Google-Maps on my android, but I don't know how to draw polygon overlay on it.
All I need seems like this screenshot.
http://i.stack.imgur.com/CcMIE.jpg
thank you.

To overlay the two needed surfaces, you can use the merge tag. take a look at this tutorial

Android MapView: custom animation possible?

Is it possible in Android to animate between two points in a Google MapView in a predefined number of seconds?
I want to write some sort of game where an object is flying from the start point to the end point. But the Object will be centered on the screen and the map shall be moved.
Do you have any idea how to do this? :)
Best,
kiwaque

Call animateTo() on your MapController.

Fit ballon overlay in mapview

I have balloon popups showing in Android MapView when a user tap:s on specific points on the map. Depending on where the user taps the balloon does not always fit insize the MapView. I solve this now by using MapController.animateTo to always have the tapped point in center. However, this is not the way I prefer it to be. I would like to animate the MapView only so much that the balloon layout fits inside MapView.
Any tips on how this can be solved?

One way to fit the balloon overlay is to override the dispatchDraw method, check the bounds of the display using getMeasuredWidth and getMeasuredHeight, and, draw the balloon such that it fits within the display area.
I am not sure if you have seen the Android MapView Balloons project on github. I have been using this code for a while and it is excellent, may be you can find some pointers to your problem from there.
Hope this helps.