How to custom graphics of DRTLS Application

I’m using DRTLS application with four anchors and one tag. I would like to change the image (size and colors) of the anchors and the tag in the view of network grid because they are too little and not really visible with our floor plan.

Is it possible ? if yes, can I make it by mylself ?

Thanks at all for your help

Hi @Sebastien
the Android application is opensource -
Android Application (source code)

So yes you can do it by yourself.


Great, thks for your answer!

Thks again but during building I obtain this error message:

Gradle sync failed: Plugin with id ‘me.tatarka.retrolambda’ not found.

There something missing ?

Finally I’ve found the missing element in the file. :wink:

But it remains a bug concerning the “compile” method:

Gradle sync failed: Could not find method compile() for arguments [directory ‘libs’] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

It appears in the “build.gradle” file at the line 50:

dependencies {
compile fileTree(dir: ‘libs’, include: [‘*.jar’])
androidTestCompile(‘’, {
exclude group: ‘’, module: ‘support-annotations’

it seems something for you ?

Hi @Sebastien
unfortunately the Android/Java/Java tools are moving ahead quickly so what was OK few months ago is not supported anymore. I got a report that from current point of view the DRTLS app uses very obsolete tools and it will need update gradle, Android libraries and remove which is now Firebase.

Unfortunately you need to this by yourself. Check the forum, I recall that someone did this some time ago.


Hi JK,

thks for your answer. It’s too difficult for me :wink:

For the moment I’ve install an old version of Android Studio (3.0.1) and it works.

Just in case, is there a documentation of the code somewhere :smiley:


Hi @Sebastien
Im glad to hear that you can compile it.

I have no other documentation that I can share. But I believe that somewhere should be some brief app documentation.


OK, so I’m going to create a new topic :wink:

Thks again