I am trying to the exact sample app (https://github.com/googlecast/CastHelloText-android) with my own package name, put the receiver code on my server.
I registered the app, and my device on the chromecast developer console.
When I try to launch the app, I get this error,
03-19 11:33:14.268: D/DeviceFilter(1060): Sending text message to chromecast: (ns=urn:x-cast:com.google.cast.tp.connection, dest=receiver-0) {"origin":{},"package":"gms_cast_mrp","type":"CONNECT"}
03-19 11:33:14.268: D/DeviceFilter(1060): Sending text message to chromecast: (ns=urn:x-cast:com.google.cast.receiver, dest=receiver-0) {"type":"GET_APP_AVAILABILITY","requestId":1,"appId":["69FFFAE0"]}
03-19 11:33:14.268: D/DeviceFilter(1060): onMessageReceived: gms_cast_mrp-21
03-19 11:33:14.268: D/DeviceFilter(1060): Received a protobuf: axm@426978b8
03-19 11:33:14.268: D/DeviceFilter(1060): Sending text message to chromecast: (ns=urn:x-cast:com.google.cast.tp.connection, dest=receiver-0) {"type":"CLOSE"}
03-19 11:33:14.268: D/DeviceFilter(1060): rejected device: "chromecast" (70e0019191420559fedfca4f6129b935)
03-19 11:33:14.278: D/CastSocket(1060): doTeardown with reason=0