Question

您好，我在启动应用程序时不断遇到此异常：

2019-02-18 16：33：14.735 2080-2080 /？ E / AndroidRuntime：致命异常：main 流程：assus.oumayma.com.firebasekotlinapp，PID：2080 java.lang.RuntimeException：无法启动活动ComponentInfo {assus.oumayma.com.firebasekotlinapp / assus.oumayma.com.firebasekotlinapp.MainActivity}：java.lang.IllegalStateException：默认FirebaseApp在此过程中未初始化为assus.oumayma.com .firebasekotlinapp。确保首先调用FirebaseApp.initializeApp（Context）。在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2725）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2786）在android.app.ActivityThread.-wrap12（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1501）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:173）在android.app.ActivityThread.main（ActivityThread.java:6459）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:938）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:828）由以下原因引起：java.lang.IllegalStateException：在此过程中，assus.oumayma.com.firebasekotlinapp没有初始化默认的FirebaseApp。确保首先调用FirebaseApp.initializeApp（Context）。 com.google.firebase.FirebaseApp.getInstance（com.google.firebase：firebase-common @@ 16.0.2：240）位于com.google.firebase.auth.FirebaseAuth.getInstance（未知来源）在assus.oumayma.com.firebasekotlinapp.MainActivity.onCreate（MainActivity.kt：23）在android.app.Activity.performCreate（Activity.java:6673）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1136）

这是代码：

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        mAuth = FirebaseAuth.getInstance()
        signOut.setOnClickListener {
                view: View? -> mAuth.signOut()
            startActivity(Intent(this, PhoneAuthenfication::class.java))
            Toast.makeText(this, "Logged out Successfully :)", Toast.LENGTH_LONG).show()
        }
    }


    override fun onStart() {
        super.onStart()
        if (mAuth.currentUser == null) {
            startActivity(Intent(this, PhoneAuthenfication::class.java))
        }else {
            Toast.makeText(this, "Already Signed in :)", Toast.LENGTH_LONG).show()
        } 
    }

}



class PhoneAuthenfication : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_phone_authenfication)

        mAuth = FirebaseAuth.getInstance()
        veriBtn.setOnClickListener { view: View? ->
            progress.visibility = View.VISIBLE
            verify()
        }
        authBtn.setOnClickListener { view: View? ->
            progress.visibility = View.VISIBLE
            authenticate()
        }
    }


    private fun verificationCallbacks() {
        mCallbacks = object : PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
            override fun onVerificationCompleted(credential: PhoneAuthCredential) {
                progress.visibility = View.INVISIBLE
                signIn(credential)
            }

            override fun onVerificationFailed(p0: FirebaseException?) {
                TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
            }

            override fun onCodeSent(verfication: String?, p1: PhoneAuthProvider.ForceResendingToken?) {
                super.onCodeSent(verfication, p1)
                verificationId = verfication.toString()
                progress.visibility = View.INVISIBLE
            }

        }
    }

    private fun verify() {

        verificationCallbacks()

        val phnNo = phnNoTxt.text.toString()

        PhoneAuthProvider.getInstance().verifyPhoneNumber(
            phnNo,
            60,
            TimeUnit.SECONDS,
            this,
            mCallbacks
        )
    }

    private fun signIn(credential: PhoneAuthCredential) {
        mAuth.signInWithCredential(credential)
            .addOnCompleteListener { task: Task<AuthResult> ->
                if (task.isSuccessful) {
                    toast("Logged in Successfully :)")
                    startActivity(Intent(this, MainActivity::class.java))
                }
            }
    }

    private fun authenticate() {

        val verifiNo = verifiTxt.text.toString()

        val credential: PhoneAuthCredential = PhoneAuthProvider.getCredential(verificationId, verifiNo)

        signIn(credential)

    }

    private fun toast(msg: String) {
        Toast.makeText(this, msg, Toast.LENGTH_LONG).show()
    }

build.gradle ：

implementation 'com.google.firebase:firebase-auth:16.1.0'
implementation 'com.google.firebase:firebase-core:16.0.7'

Answer 1

您正尝试获取Firebase实例而不对其进行初始化。在尝试获取Firebase实例之前，请添加以下代码行：

FirebaseApp.initializeApp(this);

如果您使用的是Google服务4.1.0

classpath 'com.google.gms:google-services:4.1.0'

然后将版本更新为

classpath 'com.google.gms:google-services:4.2.0'

ava.lang.IllegalStateException：默认FirebaseApp未初始化

1 个答案: