Develop Reference

Android app relase - Facebook login button crash

I have a problem with my app where I entered a login button with facebook.
When I use the app and on facebook developer options I have development mode, I have no problems,the app is working properly.
But from the moment I put it in release on facebook developer options, the app crashes as soon as I click on login
I've already put a key release hash on facebook developer, and I've made other attempts, but I can't understand the problem.
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:390)
at android.view.View.performClick(View.java:6663)
at android.view.View.performClickInternal(View.java:6635)
at android.view.View.access$3100(View.java:794)
at android.view.View$PerformClick.run(View.java:26199)
at android.os.Handler.handleCallback(Handler.java:907)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:216)
at android.app.ActivityThread.main(ActivityThread.java:7625)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385)
at android.view.View.performClick(View.java:6663) 
at android.view.View.performClickInternal(View.java:6635) 
at android.view.View.access$3100(View.java:794) 
at android.view.View$PerformClick.run(View.java:26199) 
at android.os.Handler.handleCallback(Handler.java:907) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:216) 
at android.app.ActivityThread.main(ActivityThread.java:7625) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987) 
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'long java.util.Date.getTime()' on a null object reference
at java.util.Calendar.setTime(Calendar.java:1749)
at java.text.SimpleDateFormat.format(SimpleDateFormat.java:984)
at java.text.SimpleDateFormat.format(SimpleDateFormat.java:977)
at java.text.DateFormat.format(DateFormat.java:341)
at com.example.tpistis.tauros.LoginActivity.registra_cliente(LoginActivity.java:270)
at com.example.tpistis.tauros.LoginActivity.apri_app(LoginActivity.java:242)
at java.lang.reflect.Method.invoke(Native Method) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385) 
at android.view.View.performClick(View.java:6663) 
at android.view.View.performClickInternal(View.java:6635) 
at android.view.View.access$3100(View.java:794) 
at android.view.View$PerformClick.run(View.java:26199) 
at android.os.Handler.handleCallback(Handler.java:907) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:216) 
at android.app.ActivityThread.main(ActivityThread.java:7625) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987) 

For those who were looking for an answer, the problem was that on FacebookDevoloper I did not have the privileges to be able to acquire the date of birth, basically you can only acquire name and last name, then the app crashes.

Application crashes when run on other devices

I'm having a problem with Android Studio and testing my application. I'm testing it on two identical One Plus One devices. It works fine on the one I've been using since the start, but today I tested it on the second device and it crashes when it gets to a certain part of the app.
The app in question connects two or more devices using Google Play services real time multiplayer. One the first device, it's searching for peers to play with. The second device was to test that they can connect.
However, when the button is clicked to search for devices, it crashes the app.
I will print the logs below, but I'm wondering is there some other reason why this happens? Why it works on the device I've used from the start, but doesn't on the exact same device?
Any help is GREATLY appreciated. It's really hindering my progress and Google hasn't returned much in the line of helpful results.
Logs:
03-30 17:21:49.330 10436-10436/com.example.anna.pokerapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.anna.pokerapp, PID: 10436
Theme: themes:{default=overlay:system, iconPack:system, fontPkg:system, com.android.systemui=overlay:system, com.android.systemui.navbar=overlay:system}
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:5204)
at android.view.View$PerformClick.run(View.java:21158)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5461)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:5204) 
at android.view.View$PerformClick.run(View.java:21158) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5461) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: java.lang.IllegalStateException: GoogleApiClient must be connected.
at com.google.android.gms.common.internal.zzac.zza(Unknown Source)
at com.google.android.gms.games.Games.zzb(Unknown Source)
at com.google.android.gms.games.Games.zzi(Unknown Source)
at com.google.android.gms.games.internal.api.RealTimeMultiplayerImpl.getSelectOpponentsIntent(Unknown Source)
at com.example.anna.pokerapp.QuickGame.onStartMatchClicked(QuickGame.java:50)
at java.lang.reflect.Method.invoke(Native Method) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java:5204) 
at android.view.View$PerformClick.run(View.java:21158) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5461) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

Trying to run an app using dl4j on Android

I am trying to run a simple app using the deep learning library dl4j.
I am working on Android Studio and using Gradle.
During runtime, I get the following exception:
08-15 13:23:00.601 4868-4868/com.mi.dl E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mi.dl, PID: 4868
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java)
at android.view.View$PerformClick.run(View.java)
at android.os.Handler.handleCallback(Handler.java)
at android.os.Handler.dispatchMessage(Handler.java)
at android.os.Looper.loop(Looper.java)
at android.app.ActivityThread.main(ActivityThread.java)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java) 
at android.view.View$PerformClick.run(View.java) 
at android.os.Handler.handleCallback(Handler.java) 
at android.os.Handler.dispatchMessage(Handler.java) 
at android.os.Looper.loop(Looper.java) 
at android.app.ActivityThread.main(ActivityThread.java) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java) 
Caused by: java.lang.ExceptionInInitializerError
at org.deeplearning4j.nn.conf.NeuralNetConfiguration$Builder.seed(NeuralNetConfiguration.java:485)
at com.mi.dl.MLPClassifierLinear.main(MLPClassifierLinear.java:79)
at com.mi.dl.MyActivity.sendMessage(MyActivity.java:70)
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java) 
at android.view.View$PerformClick.run(View.java) 
at android.os.Handler.handleCallback(Handler.java) 
at android.os.Handler.dispatchMessage(Handler.java) 
at android.os.Looper.loop(Looper.java) 
at android.app.ActivityThread.main(ActivityThread.java) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java) 
Caused by: java.lang.RuntimeException: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html
at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5151)
at org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:169)
at org.deeplearning4j.nn.conf.NeuralNetConfiguration$Builder.seed(NeuralNetConfiguration.java:485) 
at com.mi.dl.MLPClassifierLinear.main(MLPClassifierLinear.java:79) 
at com.mi.dl.MyActivity.sendMessage(MyActivity.java:70) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java) 
at android.view.View$PerformClick.run(View.java) 
at android.os.Handler.handleCallback(Handler.java) 
at android.os.Handler.dispatchMessage(Handler.java) 
at android.os.Looper.loop(Looper.java) 
at android.app.ActivityThread.main(ActivityThread.java) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java) 
Caused by: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html
at org.nd4j.linalg.factory.Nd4jBackend.load(Nd4jBackend.java:178)
at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5148)
at org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:169) 
at org.deeplearning4j.nn.conf.NeuralNetConfiguration$Builder.seed(NeuralNetConfiguration.java:485) 
at com.mi.dl.MLPClassifierLinear.main(MLPClassifierLinear.java:79) 
at com.mi.dl.MyActivity.sendMessage(MyActivity.java:70) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
at android.view.View.performClick(View.java) 
at android.view.View$PerformClick.run(View.java) 
at android.os.Handler.handleCallback(Handler.java) 
at android.os.Handler.dispatchMessage(Handler.java) 
at android.os.Looper.loop(Looper.java) 
at android.app.ActivityThread.main(ActivityThread.java) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java) 
in the build.gradle file, I have the following dependency:
compile 'org.nd4j:nd4j-native-platform:0.5.0'
but I have also tried different backends.
The dl4j team said Android is not supported yet, but I would still like to try to make it work, so any help would be appreciated.

Excute URL get, Error when executing urlget

I want to excute a simple url get, I used the code inside this link
http://developer.android.com/reference/java/net/HttpURLConnection.html
I want to run this code inside a click event:
URL url = new URL("http://www.android.com/");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
readStream(in);}
finally {
urlConnection.disconnect();
}
When I run the app I am getting this long error:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.soma.smsserver1, PID: 20664
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:289)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:5198) 
at android.view.View$PerformClick.run(View.java:21147) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)
at java.net.InetAddress.lookupHostByName(InetAddress.java:431)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at com.android.okhttp.internal.Network$1.resolveInetAddresses(Network.java:29)
at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:188)
at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:157)
at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:100)
at com.android.okhttp.internal.http.HttpEngine.createNextConnection(HttpEngine.java:357)
at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:340)
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330)
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:433)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:384)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:231)
at com.example.soma.smsserver1.MainActivity$override.clickMe(MainActivity.java:28)
at com.example.soma.smsserver1.MainActivity$override.access$dispatch(MainActivity.java)
at com.example.soma.smsserver1.MainActivity.clickMe(MainActivity.java:0)
at java.lang.reflect.Method.invoke(Native Method) 
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284) 
at android.view.View.performClick(View.java:5198) 
at android.view.View$PerformClick.run(View.java:21147) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)
you cannot process networking on the main thread, this is a security restriction on Android, try wrapping your call in AsyncTask a background service, or thread.
Please read documentation regarding Processes and Threads

You are doing a network Request on the MainThread, which is prohibited because it would block the UI during this call.
You should use an other Thread to do this call, you have different options : Thread, AsyncTask, etc ...
Some examples here :
http://android-developers.blogspot.com/2010/07/multithreading-for-performance.html

you are handling network on Main Thread which will make your app hang so, you need to handle long running task on background service like AsyncTask
check this link https://www.upwork.com/hiring/mobile/why-you-should-use-asynctask-in-android-development/

Unable to display EditText error in Kotlin code

I have switched my Android development over to Kotlin, but I am dealing with a crash that I can't figure out. I am used to, in Java, being able to display an error on an empty EditText:
if(mEmail.getText().toString().isEmpty()) {
mEmail.setError("Email cannot be blank.");
}
To the best of my knowledge, that could be translated to Kotlin as:
if(email.text.toString().isEmpty()) {
email.error = "Email cannot be blank."
}
However, that doesn't work, and I get the following stack trace:
Process: com.androidessence.capturethetag, PID: 4016
android.view.InflateException: Binary XML file line #17: Error inflating class TextView
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at android.widget.Editor.showError(Editor.java:319)
at android.widget.Editor.setError(Editor.java:355)
at android.widget.TextView.setError(TextView.java:4648)
at android.widget.TextView.setError(TextView.java:4633)
at com.androidessence.capturethetag.activities.LoginActivity.validateInput(LoginActivity.kt:31)
at com.androidessence.capturethetag.activities.LoginActivity.access$validateInput(LoginActivity.kt:12)
at com.androidessence.capturethetag.activities.LoginActivity$onCreate$1.onClick(LoginActivity.kt:19)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.RuntimeException: Failed to resolve attribute at index 24
at android.content.res.TypedArray.getColor(TypedArray.java:401)
at android.widget.TextView.<init>(TextView.java:696)
at android.widget.TextView.<init>(TextView.java:632)
at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:60)
at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:56)
at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:92)
at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:938)
at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:992)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:725)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
at android.widget.Editor.showError(Editor.java:319) 
at android.widget.Editor.setError(Editor.java:355) 
at android.widget.TextView.setError(TextView.java:4648) 
at android.widget.TextView.setError(TextView.java:4633) 
at com.androidessence.capturethetag.activities.LoginActivity.validateInput(LoginActivity.kt:31) 
at com.androidessence.capturethetag.activities.LoginActivity.access$validateInput(LoginActivity.kt:12) 
at com.androidessence.capturethetag.activities.LoginActivity$onCreate$1.onClick(LoginActivity.kt:19) 
at android.view.View.performClick(View.java:4780) 
at android.view.View$PerformClick.run(View.java:19866) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:135) 
at android.app.ActivityThread.main(ActivityThread.java:5254) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
Any ideas why this is crashing in Kotlin?
EDIT
For more information, you can see my content_login.xml file here. I've used Gist to save space.
Also, I never call findViewById(); on my EditText because the Kotlin-Android Extension Plugin can do it, as mentioned here: https://kotlinlang.org/docs/tutorials/android-plugin.html
I have no doubts that it's referencing the right EditText, because logging showed me that it was able to determine the EditText was empty, but is unable to set the error attribute.