java - Like counter Firebase Android -


i made app button, add counter...but i'm confused. can me? how can add counter? have 2 functions:

first

viewholder.mlikebtn.setonclicklistener(new view.onclicklistener() {                 @override                 public void onclick(view v) {                      mprocesslike = true;                      if(mprocesslike){                          mdatabaselike.addvalueeventlistener(new valueeventlistener() {                             @override                             public void ondatachange(datasnapshot datasnapshot) {                                  if (mprocesslike) {                                      if (datasnapshot.child(post_key).haschild(mauth.getcurrentuser().getuid())) {                                          mdatabaselike.child(post_key).child(mauth.getcurrentuser().getuid()).removevalue();                                         mprocesslike=false;                                       } else {                                          mdatabaselike.child(post_key).child(mauth.getcurrentuser().getuid()).setvalue("randomvalue");                                          mprocesslike=false;                                     }                                  }                              }                              @override                             public void oncancelled(databaseerror databaseerror) {                              }                         });                      }                  }             }

second (it's change colour of button)

public void setlikebtn(final string post_key){          mdatabaselike.addvalueeventlistener(new valueeventlistener() {             @override             public void ondatachange(datasnapshot datasnapshot) {                  if(datasnapshot.child(post_key).haschild(mauth.getcurrentuser().getuid())){                      mlikebtn.setimageresource(r.mipmap.likepieno);                  }else{                     mlikebtn.setimageresource(r.mipmap.likevuoto);                 }              }              @override             public void oncancelled(databaseerror databaseerror) {              }         });      }


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