Firebase Database Permission denied with read/write permissions set to true

Question

I\'m having trouble writing to my Firebase database in my simple Android app. I\'ve set my database rules to be public:

{
  \"rules\": {
    \".read\": true,         


        

Answer 1

Okay I have tried all above solution and failed. After a while I found that my Project has 2 modules and I call firebase in the second module instead of the main one, so the solution is to add the second one to the firebase project too, and it works.