Working with old (Android 4) Eclipse-ADT based Android-Projects

As I'm trying to revive "Wood Games 3D" I obviously need to debug at some point on the device. But how to build it at all? Here the step I took:

1. Install eclipse photon (newer versions might not work with the ADT-plugin)
2. Go to help -> Eclipse Marketplace and search for ADT.
3. Install ADT Android-Plugin
4. Restart eclipse, install the SDKs you need.
5. If you get an error telling you something like:

   Unknown error: Unable to build: the file dx.jar was not loaded from the SDK folder
   

   You can specify build-tools that do fit better your sdk (e.g. 19.1.0 ) in your project.properties-file

   # Project target.
   target=android-15
   # Build tools
   sdk.buildtools=19.1.0
   

   If that does not work you can try to download build-tools 25.0.3 and copy DxConsole.class to your current dx.jar. Like here
   More Read
6. If you try to use "Debug as Android Application" and get an error like:

   Can't bind to local 8600 for debugger
   

   Go to eclipse->window->preferences->android->DDMS:
   1. Set 'debugger port to 8601'
   2. Check 'Use ADBHOST' (leave the value '127.0.0.1')
   3. kill the adb-server:

   adb kill-server
   

   4. restart eclipse
   5. Try to debug again: "Debug as Android Application" (I'm actually not sure if all steps are needed but those made the job for me,... I guess just restart eclipse is already enough... )
      More Read1 More Read2
   6. If you get some "ClassNotFoundException"s make sure all relevant projects and libraries are exported:
      Check here: "Project -> Properties -> Java Build Path -> Order & Export and ensure everything you want to be part of the apk is checked" More read