I have used phone authentication in my app. While authenticating with phone number which is in same mobile it fails and show error for null pointer exception of Realtime database, but while authenticating with phone number which is in another phone and app in another phone it works perfectly. Why it fails for phone number in same mobile containing app?
Otpverify.kt
package com.bookqueen.bookqueen.Activity
class OtpVerfiy : AppCompatActivity() {
lateinit var auth: FirebaseAuth
lateinit var storedVerificationId: String
lateinit var resendToken: PhoneAuthProvider.ForceResendingToken
private lateinit var callbacks: PhoneAuthProvider.OnVerificationStateChangedCallbacks
lateinit var verify: Button
lateinit var resendotp: TextView
lateinit var numbertext: TextView
lateinit var progressBar: ProgressBar
lateinit var database: FirebaseDatabase
lateinit var databaseReference: DatabaseReference
lateinit var number: String
lateinit var otp: EditText
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_otp_verfiy)
auth = FirebaseAuth.getInstance()
verify = findViewById(R.id.btnverify)
resendotp = findViewById(R.id.resendotp)
progressBar = findViewById(R.id.progressBar)
numbertext = findViewById(R.id.intnumber)
otp = findViewById(R.id.edtotp)
progressBar.visibility = View.GONE
database = FirebaseDatabase.getInstance()
databaseReference = database.getReference("Users")
val mobileNumber = intent.getStringExtra("mobilenumber")
number = "+91" + mobileNumber.toString().trim()
numbertext.text = number
verify.setOnClickListener {
//val otp = findViewById<EditText>(R.id.edtotp).text.toString().trim()
if (TextUtils.isEmpty(otp.text.toString())) {
otp.error = getString(R.string.enterotp)
} else if (otp.length() > 0 || otp.length() == 4) {
progressBar.visibility = View.VISIBLE
val credential: PhoneAuthCredential = PhoneAuthProvider.getCredential(
storedVerificationId.toString(), otp.text.toString().trim()
)
signInWithPhoneAuthCredential(credential)
} else {
Toast.makeText(this, getString(R.string.invalidotp), Toast.LENGTH_SHORT).show()
progressBar.visibility = View.GONE
}
}
resendotp.setOnClickListener {
resendcodeforverification(number, resendToken)
Toast.makeText(this, getString(R.string.otpsent), Toast.LENGTH_SHORT).show()
}
callbacks = object : PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
override fun onVerificationCompleted(credential: PhoneAuthCredential) {
startActivity(Intent(applicationContext, MainActivity::class.java))
finish()
}
override fun onVerificationFailed(e: FirebaseException) {
Toast.makeText(applicationContext, getString(R.string.verificationfailed),
Toast.LENGTH_LONG).show()
}
override fun onCodeSent(
verificationId: String,
token: PhoneAuthProvider.ForceResendingToken
) {
storedVerificationId = verificationId
resendToken = token
}
}
sendVerificationcode(number)
}
private fun sendVerificationcode(number: String) {
val options = PhoneAuthOptions.newBuilder(auth)
.setPhoneNumber(number)
.setTimeout(60L, TimeUnit.SECONDS)
.setActivity(this)
.setCallbacks(callbacks)
.build()
PhoneAuthProvider.verifyPhoneNumber(options)
}
private fun resendcodeforverification(
phone: String,
token: PhoneAuthProvider.ForceResendingToken?
) {
val option = PhoneAuthOptions.newBuilder()
.setPhoneNumber(phone)
.setTimeout(60L, TimeUnit.SECONDS)
.setActivity(this)
.setCallbacks(callbacks)
.setForceResendingToken(token!!)
.build()
PhoneAuthProvider.verifyPhoneNumber(option)
}
private fun signInWithPhoneAuthCredential(credential: PhoneAuthCredential) {
auth.signInWithCredential(credential)
.addOnCompleteListener(this) { task ->
if (task.isSuccessful) {
Toast.makeText(this, getString(R.string.signinsuccess),
Toast.LENGTH_SHORT).show()
databaseReference.orderByChild("Phone").equalTo(number)
.addListenerForSingleValueEvent(object : ValueEventListener {
override fun onDataChange(snapshot: DataSnapshot) {
if (snapshot.value != null) {
startActivity(
Intent(
applicationContext,
MainActivity::class.java
)
)
progressBar.visibility = View.GONE
finish()
} else {
startActivity(
Intent(
applicationContext,
SaveProfile::class.java
)
)
progressBar.visibility = View.GONE
finish()
}
}
override fun onCancelled(error: DatabaseError) {
Toast.makeText(this@OtpVerfiy, error.message, Toast.LENGTH_SHORT)
.show()
}
})
} else {
if (task.exception is FirebaseAuthInvalidCredentialsException) {
Toast.makeText(this, getString(R.string.invalidotp),
Toast.LENGTH_SHORT).show()
progressBar.visibility = View.GONE
}
}
}
.addOnFailureListener { e ->
Toast.makeText(this, e.message.toString(), Toast.LENGTH_SHORT).show()
progressBar.visibility = View.GONE
}
}
}
Error Message
2021-11-19 08:58:35.920 26039-26039/com.bookqueen.bookqueen
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.bookqueen.bookqueen, PID: 26039
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.bookqueen.bookqueen/com.bookqueen.bookqueen
.Activity.MainActivity}: java.lang.NullPointerException at
android.app.ActivityThread.performLaunchActivity
(ActivityThread.java:3534) at
android.app.ActivityThread.handleLaunchActivity
(ActivityThread.java:3689)at
android.app.servertransaction.LaunchActivityItem.execute
(LaunchActivityItem.java:83) at
android.app.servertransaction.TransactionExecutor.executeCallbacks
(TransactionExecutor.java:140)at
android.app.servertransaction.TransactionExecutor.execute
(TransactionExecutor.java:100)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2239)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:227)
at android.app.ActivityThread.main(ActivityThread.java:7822)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run
(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1026)
Caused by: java.lang.NullPointerException at
com.bookqueen.bookqueen.Activity.MainActivity
.onCreate(MainActivity.kt:40)
at android.app.Activity.performCreate(Activity.java:7969)
at android.app.Activity.performCreate(Activity.java:7958)
at android.app.Instrumentation.callActivityOnCreate
(Instrumentation.java:1306)
at android.app.ActivityThread.performLaunchActivity
(ActivityThread.java:3505)
build.gradle(:app)
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 30
buildToolsVersion "30.0.3"
defaultConfig {
applicationId "com.bookqueen.bookqueen"
minSdkVersion 18
targetSdkVersion 30
versionCode 1
versionName "1.0"
multiDexEnabled true
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-
optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation fileTree(dir: "libs", include: ["*.jar"])
implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
implementation 'androidx.core:core-ktx:1.6.0'
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'androidx.coordinatorlayout:coordinatorlayout:1.1.0'
implementation 'com.google.firebase:firebase-auth:21.0.1'
implementation 'com.google.firebase:firebase-analytics-ktx:19.0.0'
implementation 'com.google.firebase:firebase-database-ktx:20.0.1'
implementation 'com.google.firebase:firebase-firestore-ktx:23.0.3'
implementation 'com.google.firebase:firebase-storage-ktx:20.0.0'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
//material design
implementation 'com.google.android.material:material:1.5.0-alpha01'
// Import the BoM for the Firebase platform
implementation platform('com.google.firebase:firebase-bom:28.3.0')
// Declare the dependency for the Firebase Authentication library
// When using the BoM, you don't specify versions in Firebase library
dependencies
implementation 'com.google.firebase:firebase-auth-ktx'
implementation 'com.google.android.material:material:1.1.0'
implementation 'com.squareup.picasso:picasso:2.71828'
implementation 'com.google.android.material:material:1.3.0-alpha03'
implementation 'de.hdodenhof:circleimageview:3.1.0'
implementation 'com.github.smarteist:autoimageslider:1.4.0'
implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.1.0")
}
