I used Firebase authentication in my Android application so when I press the button login when the text fields email and password are empty my application crash. I used Firebase version 10.0.1, This my code :
button_login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final String email_et = mail_login_et.getText().toString();
final String password_et = pass_login_et.getText().toString();
mAuth.signInWithEmailAndPassword(email_et, password_et)
.addOnCompleteListener(LoginActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
Log.d("LOGINACT", "signInWithEmail:onComplete:" + task.isSuccessful());
if (task.isSuccessful()) {
startActivity(new Intent(LoginActivity.this, MainActivity.class));
} else {
// startActivity(new Intent(LoginActivity.this, MainActivity.class));*
Log.w("LOGINACT", "signInWithEmail:failed", task.getException());
}
}
});
}
});
and this is the error log:
E/UncaughtException: java.lang.IllegalArgumentException: Given String is empty or null
at com.google.android.gms.common.internal.zzac.zzdv(Unknown Source)
at com.google.firebase.auth.FirebaseAuth.signInWithEmailAndPassword(Unknown Source)
at com.esprit.couverture4g.activities.LoginActivity$1.onClick(LoginActivity.java:83)
at android.view.View.performClick(View.java:5198)
at android.view.View$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)
W/art: Suspending all threads took: 25.358ms
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.esprit.couverture4g, PID: 3127
java.lang.IllegalArgumentException: Given String is empty or null
at com.google.android.gms.common.internal.zzac.zzdv(Unknown Source)
at com.google.firebase.auth.FirebaseAuth.signInWithEmailAndPassword(Unknown Source)
at com.esprit.couverture4g.activities.LoginActivity$1.onClick(LoginActivity.java:83)
at android.view.View.performClick(View.java:5198)
at android.view.View$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$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Related
I have tried everything from tutorials, answers all around, even with examples from https://github.com/facebook/facebook-android-sdk/tree/master/samples. I have tried with test app and normal app in developers.facebook.com/apps
But i always get this error
A valid Facebook app id must be set in the AndroidManifest.xml or set by calling FacebookSdk.setApplicationId before initializing the sdk.
Full error:
05-31 22:19:09.798 2895-2895/jonjon.fb1 I/art: Not late-enabling -Xcheck:jni (already on)
05-31 22:19:09.868 2895-2895/jonjon.fb1 W/System: ClassLoader referenced unknown path: /data/app/jonjon.fb1-1/lib/x86_64
05-31 22:19:09.888 2895-2895/jonjon.fb1 I/FacebookInitProvider: Failed to auto initialize the Facebook SDK
A valid Facebook app id must be set in the AndroidManifest.xml or set by calling FacebookSdk.setApplicationId before initializing the sdk.
at com.facebook.FacebookSdk.sdkInitialize(FacebookSdk.java:275)
at com.facebook.FacebookSdk.sdkInitialize(FacebookSdk.java:231)
at com.facebook.internal.FacebookInitProvider.onCreate(FacebookInitProvider.java:20)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1748)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1723)
at android.app.ActivityThread.installProvider(ActivityThread.java:5153)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4748)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4688)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
at android.os.Handler.dispatchMessage(Handler.java:102)
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$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
05-31 22:19:09.892 2895-2895/jonjon.fb1 D/AndroidRuntime: Shutting down VM
--------- beginning of crash
05-31 22:19:09.892 2895-2895/jonjon.fb1 E/AndroidRuntime: FATAL EXCEPTION: main
Process: jonjon.fb1, PID: 2895
java.lang.RuntimeException: Unable to get provider com.facebook.accountkit.internal.AccountKitInitProvider: 500: Initialization error: 502: The App Id must be specified in the string resource file as com.facebook.sdk.ApplicationId
at android.app.ActivityThread.installProvider(ActivityThread.java:5156)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4748)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4688)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
at android.os.Handler.dispatchMessage(Handler.java:102)
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$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: 500: Initialization error: 502: The App Id must be specified in the string resource file as com.facebook.sdk.ApplicationId
at com.facebook.accountkit.internal.Initializer.getRequiredString(Initializer.java:228)
at com.facebook.accountkit.internal.Initializer.initialize(Initializer.java:113)
at com.facebook.accountkit.internal.AccountKitController.initialize(AccountKitController.java:592)
at com.facebook.accountkit.internal.AccountKitInitProvider.onCreate(AccountKitInitProvider.java:31)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1748)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1723)
at android.app.ActivityThread.installProvider(ActivityThread.java:5153)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4748)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4688)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
at android.os.Handler.dispatchMessage(Handler.java:102)
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$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
05-31 22:41:18.585 3969-3969/jonjon.fb1 D/AndroidRuntime: Shutting down VM
05-31 22:41:18.585 3969-3969/jonjon.fb1 E/AndroidRuntime: FATAL EXCEPTION: main
Process: jonjon.fb1, PID: 3969
java.lang.RuntimeException: Unable to get provider com.facebook.accountkit.internal.AccountKitInitProvider: 500: Initialization error: 503: The Client Token must be specified in the string resource file as com.facebook.accountkit.ClientToken
at android.app.ActivityThread.installProvider(ActivityThread.java:5156)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4748)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4688)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
at android.os.Handler.dispatchMessage(Handler.java:102)
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$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: 500: Initialization error: 503: The Client Token must be specified in the string resource file as com.facebook.accountkit.ClientToken
at com.facebook.accountkit.internal.Initializer.getRequiredString(Initializer.java:228)
at com.facebook.accountkit.internal.Initializer.initialize(Initializer.java:118)
at com.facebook.accountkit.internal.AccountKitController.initialize(AccountKitController.java:592)
at com.facebook.accountkit.internal.AccountKitInitProvider.onCreate(AccountKitInitProvider.java:31)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1748)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1723)
at android.app.ActivityThread.installProvider(ActivityThread.java:5153)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4748)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4688)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
at android.os.Handler.dispatchMessage(Handler.java:102)
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)
Add
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//initialize Facebook SDK
FacebookSdk.setClientToken("XXXXXXXXXXXXX");
FacebookSdk.sdkInitialize(getApplicationContext());
if (BuildConfig.DEBUG) {
FacebookSdk.setIsDebugEnabled(true);
FacebookSdk.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
} }
Add
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//initialize Facebook SDK
FacebookSdk.sdkInitialize(getApplicationContext());
if (BuildConfig.DEBUG) {
FacebookSdk.setIsDebugEnabled(true);
FacebookSdk.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
}
setContentView(R.layout.activity_main); }
It fails to initialize the library.
I think the solution as said in the logcat is to add a string in strings.xml with the name
com.facebook.sdk.ApplicationId
As value you must put the token
Then you can call
FacebookSdk.sdkInitialize(this);
In onCreate
Since FacebookSdk.sdkInitialize(getApplicationContext()); is deprecated. You can use these methods to initialize facebookSDK
FacebookSdk.fullyInitialize();
AppEventsLogger.activateApp(application);
It works fine
Currently trying out Google's Places API and meanwhile trying to push a Place to my Firebase database. The code below tries to do that but errors out when it is called.
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PLACE_PICKER_REQUEST) {
if (resultCode == RESULT_OK) {
Place place = PlacePicker.getPlace(this, data);
String toastMsg = String.format("Place: %s", place.getName());
Toast.makeText(this, toastMsg, Toast.LENGTH_LONG).show();
String userUid = FirebaseAuth.getInstance().getCurrentUser().getUid();
DatabaseReference userRef = database.getReference("users/" + userUid);
userRef.setValue(place);
}
}
}
The error I get is as follows:
11-23 18:34:24.874 13155-13155/io.app.roomie E/AndroidRuntime: FATAL EXCEPTION: main
Process: io.app.roomie, PID: 13155
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { (has extras) }} to activity {io.app.roomie/io.app.roomie.MainActivity}: com.google.firebase.database.DatabaseException: Found conflicting getters for name: getAddress
at android.app.ActivityThread.deliverResults(ActivityThread.java:4089)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4132)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1533)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: com.google.firebase.database.DatabaseException: Found conflicting getters for name: getAddress
at com.google.android.gms.internal.zzamy$zza.<init>(Unknown Source)
at com.google.android.gms.internal.zzamy.zzj(Unknown Source)
at com.google.android.gms.internal.zzamy.zzca(Unknown Source)
at com.google.android.gms.internal.zzamy.zzbz(Unknown Source)
at com.google.firebase.database.DatabaseReference.zza(Unknown Source)
at com.google.firebase.database.DatabaseReference.setValue(Unknown Source)
at io.app.roomie.MainActivity.onActivityResult(MainActivity.java:81)
at android.app.Activity.dispatchActivityResult(Activity.java:6932)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4085)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4132)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1533)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Sorry about the code formatting. I couldn't get it to work otherwise.
The class com.google.android.gms.location.places.Place is not meant to be directly saved into Firebase.
You should write a simple POJO class that contains only the fields you need from Place, copy the data, and save this simple object into the database.
I wrote a code to get the current position of the device every time the user clicks on a button. But when I call the listener, the app just crashes. Can anyone give me an insight of what I did wrong? Thanks in advance.
public void onStartService()
{
addListenerLocation();
}
#SuppressLint("NewApi")
private void addListenerLocation()
{
mLocationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
LocationListener mLocationListener = new LocationListener()
{
public void onLocationChanged(Location location)
{
currentLat = location.getLatitude();
InstanciaObjetos.setPEDLAT(currentLat);
currentLon = location.getLongitude();
InstanciaObjetos.setPEDLON(currentLon);
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
//TODO -- Barney says what should happen
}
public void onProviderEnabled(String provider)
{
Location lastKnownLocation = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(lastKnownLocation!=null)
{
currentLat = lastKnownLocation.getLatitude();
currentLon = lastKnownLocation.getLongitude();
}
}
public void onProviderDisabled(String provider)
{
}
};
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 0, 0, mLocationListener);
}
to start the service I just call onStartService(). Is there anything else I need to do?
I've just attached the logcat. Now I realized what needs to be done (I guess).
09-21 23:17:41.209 8861-8861/br.com.appvendasfs E/AndroidRuntime: FATAL EXCEPTION: main
Process: br.com.appvendasfs, PID: 8861
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.view.View$DeclaredOnClickListener.onClick(View.java:4452)
at android.view.View.performClick(View.java:5198)
at android.view.View$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$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4447)
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.IllegalStateException: System services not available to Activities before onCreate()
at android.app.Activity.getSystemService(Activity.java:5253)
at appVendasFS.DAO.PedidosDAO.addListenerLocation(PedidosDAO.java:47)
at appVendasFS.DAO.PedidosDAO.onStartService(PedidosDAO.java:40)
at appVendasFS.DAO.PedidosDAO.Inserir(PedidosDAO.java:97)
at appVendasFS.UI.TelaVenda.Inserir_Pedido(TelaVenda.java:813)
at appVendasFS.UI.TelaVenda.onClick_botao(TelaVenda.java:593)
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4447)
at android.view.View.performClick(View.java:5198)
at android.view.View$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)
Call addListenerLocation(); in the service's onCreate() method instead.
I have Firebase fully installed into Android Studio, and I've tested it with a couple 1 activity applications, but on the only application with more than one activity, it's not working.
When I try to do the following in my 'Sign up' code:
private void makeStudent(String email, String password) {
Student s = new Student(email, password);
Firebase ref = new Firebase("MYAPP.firebaseio.com/");
//took out my app name
Firebase studentlocation = ref.child("Student");
studentlocation.setValue(s); //this is the line on which I get the error
//also, when I go on my firebase site, it hasn't created the Student
//directory
}
The Firebase page said:
If your Android app has multiple activities, add this code to your Application Class. Otherwise add it in your main activity.
So, I looked around, and this is what I created:
I made a MyApplication.java file, which contained:
import com.firebase.client.Firebase;
public class MyApplication extends android.app.Application {
#Override
public void onCreate() {
super.onCreate();
Firebase.setAndroidContext(this);
}
}
Then I placed the following into AndroidManifest.xml:
android:name=".MyApplication"
Yet, I still receive an error on the exact same line.
How do I fix this Firebase issue? I appreciate any help I can get, please!
ERROR RECEIVED (scroll to the right in the code box):
FATAL EXCEPTION: main
Process: professionalgrader.professionalgrader, PID: 3827
com.firebase.client.FirebaseException: Failed to parse to snapshot
at com.firebase.client.Firebase.setValueInternal(Firebase.java:347)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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.IllegalArgumentException: length=0; index=0 (through reference chain: professionalgrader.professionalgrader.Student["listofTermClasses"])
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:2615)
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:2542)
at com.firebase.client.Firebase.setValueInternal(Firebase.java:336)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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: com.fasterxml.jackson.databind.JsonMappingException: length=0; index=0 (through reference chain: professionalgrader.professionalgrader.Student["listofTermClasses"])
at com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:184)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:605)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:142)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:118)
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:2593)
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:2542)
at com.firebase.client.Firebase.setValueInternal(Firebase.java:336)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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.ArrayIndexOutOfBoundsException: length=0; index=0
at professionalgrader.professionalgrader.Student.getListofTermClasses(Student.java:252)
at java.lang.reflect.Method.invoke(Native Method)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.get(BeanPropertyWriter.java:679)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:534)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:597)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:142)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:118)
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:2593)
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:2542)
at com.firebase.client.Firebase.setValueInternal(Firebase.java:336)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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)
THE SECOND ERROR:
06-15 04:13:34.902 3089-3089/professionalgrader.professionalgrader E/AndroidRuntime: FATAL EXCEPTION: main
Process: professionalgrader.professionalgrader, PID: 3089
com.firebase.client.FirebaseException: Failed to parse to snapshot
at com.firebase.client.Firebase.setValueInternal(Firebase.java:347)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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.IllegalArgumentException: Attempt to invoke virtual method 'double professionalgrader.professionalgrader.Class.getGPA()' on a null object reference (through reference chain: professionalgrader.professionalgrader.Student["totalGPA"])
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:2615)
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:2542)
at com.firebase.client.Firebase.setValueInternal(Firebase.java:336)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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: com.fasterxml.jackson.databind.JsonMappingException: Attempt to invoke virtual method 'double professionalgrader.professionalgrader.Class.getGPA()' on a null object reference (through reference chain: professionalgrader.professionalgrader.Student["totalGPA"])
at com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:184)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:605)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:142)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:118)
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:2593)
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:2542)
at com.firebase.client.Firebase.setValueInternal(Firebase.java:336)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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.NullPointerException: Attempt to invoke virtual method 'double professionalgrader.professionalgrader.Class.getGPA()' on a null object reference
at professionalgrader.professionalgrader.Student.getTotalGPA(Student.java:199)
at java.lang.reflect.Method.invoke(Native Method)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.get(BeanPropertyWriter.java:679)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:534)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:597)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:142)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:118)
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:2593)
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:2542)
at com.firebase.client.Firebase.setValueInternal(Firebase.java:336)
at com.firebase.client.Firebase.setValue(Firebase.java:238)
at professionalgrader.professionalgrader.SignUp.makeStudent(SignUp.java:94)
at professionalgrader.professionalgrader.SignUp.access$500(SignUp.java:16)
at professionalgrader.professionalgrader.SignUp$1.onClick(SignUp.java:45)
at android.view.View.performClick(View.java:5198)
at android.view.View$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)
Possible source of error because it told me it couldn't obtain the Snapshot at the line in makeStudent(), but makeStudent() doesn't use Snapshot. Only userExists() does. Note: The variable 'exists' is defined as a static boolean in the SignUp class.
private boolean userExists() {
Firebase ref = new Firebase("MYAPPNAME.firebaseio.com");
ref.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot snapshot) {
for (DataSnapshot postSnapShot: snapshot.getChildren()) {
Student s = postSnapShot.getValue(Student.class);
if(s.getEmail().equals(mEmailView.getText().toString())) {
exists = true;
}
}
}
#Override
public void onCancelled(FirebaseError firebaseError) {
exists = true;
}
});
return exists;
}
SOLUTION TO MY ISSUE:
I realized that Snapshot was never used in makeStudent(), and that was where the error started. Thus, I looked in the only place it was used... userExists(), and it turned out that I was correct! The error was produced by trying to identify Student s as a nonexistent student! Thus, I actually needed a try like such:
private boolean userExists() {
Firebase ref = new Firebase("MYAPPNAME.firebaseio.com");
ref.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot snapshot) {
Student s;
for (DataSnapshot postSnapShot: snapshot.getChildren()) {
try {
s = postSnapShot.getValue(Student.class);
if(s.getEmail().equals(mEmailView.getText().toString())) {
System.out.println(snapshot.getValue());
exists = true;
}
} catch(Exception e) {
exists = false;
}
}
}
#Override
public void onCancelled(FirebaseError firebaseError) {
exists = true;
}
});
return exists;
}
I'm getting an Exception when I'm executing this code:
public void onClick(View view){
(...)
CharSequence text1 = "Please insert a number.";
int id= view.getId();
(...)
else if(id== R.id.buttonOK){
if(editText.getText().toString().matches(""))
{
Toast.makeText(view.getContext(), text1, Toast.LENGTH_SHORT).show();
}
The exception is when Toast.makeText is executed. I've already tried as 1st argument:
getApplicationContext()
this
MyActivity.this
view.getContext()
and I always get this error. Can you please help me?
Exception:
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:4007)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
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:5221)
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:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
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.view.View$1.onClick(View.java:4002)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
at android.os.Handler.handleCallback(Handler.java:739)
You can use the instance of Activity, for example:
MainActivity.this
In your case:
Toast.makeText(MainActivity.this, text1, Toast.LENGTH_SHORT).show();
If the error is in the code that you had given is then :
//make sure that you had declared and defined editext properly
else if(id== R.id.buttonOK){
if(editText.getText().toString().equals(""))
{
Toast.makeText(view.getContext(), "String", Toast.LENGTH_SHORT).show();
}