android NullPointerException 上的 SMS 身份验证

Question

我收到了这个错误

更新错误：

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: xxx.com.xxx, PID: 4963
                  java.lang.NullPointerException: Attempt to invoke virtual method 'com.google.android.gms.tasks.Task
com.google.android.gms.common.api.GoogleApi.zzb(com.google.android.gms.common.api.internal.zzdf)'
on a null object reference
                      at com.google.android.gms.internal.zzdtp.zzb(Unknown Source)
                      at com.google.android.gms.internal.zzdtw.zza(Unknown Source)
                      at com.google.firebase.auth.FirebaseAuth.zza(Unknown Source)
                      at com.google.firebase.auth.PhoneAuthProvider.zza(Unknown Source)
                      at com.google.firebase.auth.PhoneAuthProvider.verifyPhoneNumber(Unknown
Source)
                      at xxx.com.xxx.PhoneNumberActivity.onClick(PhoneNumberActivity.java:110)
                      at android.view.View.performClick(View.java:5265)
                      at android.view.View$PerformClick.run(View.java:21534)
                      at android.os.Handler.handleCallback(Handler.java:815)
                      at android.os.Handler.dispatchMessage(Handler.java:104)
                      at android.os.Looper.loop(Looper.java:207)
                      at android.app.ActivityThread.main(ActivityThread.java:5728)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)

当我尝试运行这段代码时

PhoneAuthProvider.getInstance().verifyPhoneNumber(
            phoneNumber,        // Phone number to verify
            60,                 // Timeout duration
            TimeUnit.SECONDS,   // Unit of timeout
            this,               // Activity (for callback binding)
            mCallbacks);        // OnVerificationStateChangedCallbacks

在应用程序 build.gradle 中

implementation 'com.google.firebase:firebase-database:11.6.0'
implementation 'com.google.firebase:firebase-auth:11.6.0'

为什么说它是空的？什么是空？我在 android 设备 Android 6.0 版上运行它。是因为手机上没有sim卡吗？我已经在控制台中启用了电话身份验证，并且它在 iOS 上运行。

更新：

更新firebase-core和firebasse-auth版本后，应用不再崩溃。

implementation 'com.google.firebase:firebase-core:16.0.5'
implementation 'com.google.firebase:firebase-auth:16.0.5'

发现它是由我正在测试的手机的 8.3.01 (2385995-434) 版 Google Play 服务引起的。任何解决方案使其适用于 8.3.01？

错误：

" W/GooglePlayServicesUtil：Google Play 服务已过期。 需要 12451000 但找到 8301434"

问题：

如何控制最低 Google Play 服务版本？

Answer 1

你可以看看这个工作代码。

build.gradle（应用级）

dependencies {
    implementation 'com.google.firebase:firebase-core:16.0.5'
    implementation 'com.google.firebase:firebase-auth:16.0.5'
}

build.gradle（项目级）

buildscript {
    dependencies {
        classpath 'com.google.gms:google-services:4.1.0'
    }
}

活动：

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.FirebaseException;
import com.google.firebase.FirebaseTooManyRequestsException;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseAuthInvalidCredentialsException;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.auth.PhoneAuthCredential;
import com.google.firebase.auth.PhoneAuthProvider;
import java.util.concurrent.TimeUnit;

public class FCMsmsTest extends AppCompatActivity {

    private EditText editText;
    private String mVerificationId = "";
    PhoneAuthProvider.OnVerificationStateChangedCallbacks mCallbacks = new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {

        @Override
        public void onVerificationCompleted(PhoneAuthCredential phoneAuthCredential) {
            Toast.makeText(FCMsmsTest.this, "onVerificationCompleted " + phoneAuthCredential.toString(), Toast.LENGTH_SHORT).show();
            signInWithPhoneAuthCredential(phoneAuthCredential);
        }

        @Override
        public void onVerificationFailed(FirebaseException e) {
            Toast.makeText(FCMsmsTest.this, "onVerificationFailed " + e.toString(), Toast.LENGTH_SHORT).show();

            if (e instanceof FirebaseAuthInvalidCredentialsException) {
                Toast.makeText(FCMsmsTest.this, "Invalid Request " + e.toString(), Toast.LENGTH_SHORT).show();
            } else if (e instanceof FirebaseTooManyRequestsException) {
                Toast.makeText(FCMsmsTest.this, "The SMS quota for the project has been exceeded " + e.toString(), Toast.LENGTH_SHORT).show();
            }
        }

        @Override
        public void onCodeSent(String verificationId,
                               PhoneAuthProvider.ForceResendingToken token) {
            Toast.makeText(FCMsmsTest.this, "onCodeSent " + verificationId, Toast.LENGTH_SHORT).show();
            editText.setText("");

            mVerificationId = verificationId;
            PhoneAuthProvider.ForceResendingToken mResendToken = token;

            showDialog();

        }

    };

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fcm_sms_test);

        editText = findViewById(R.id.edit_text);
        findViewById(R.id.btn_send_sms).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (editText.getText().toString().trim().length() > 9) {
                    sendSMS("+91" + editText.getText().toString().trim());
                } else {
                    Toast.makeText(FCMsmsTest.this, "Enter Valid PhoneNumber", Toast.LENGTH_SHORT).show();
                }

            }
        });
    }

    private void sendSMS(String phoneNumber) {
        PhoneAuthProvider.getInstance().verifyPhoneNumber(
                phoneNumber,        // Phone number to verify
                60,                 // Timeout duration
                TimeUnit.SECONDS,   // Unit of timeout
                this,               // Activity (for callback binding)
                mCallbacks);
    }

    private void signInWithPhoneAuthCredential(PhoneAuthCredential credential) {
        FirebaseAuth mAuth = FirebaseAuth.getInstance();
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            Toast.makeText(FCMsmsTest.this, "signInWithCredential:success", Toast.LENGTH_SHORT).show();
                            FirebaseUser user = task.getResult().getUser();
                        } else {
                            Toast.makeText(FCMsmsTest.this, "signInWithCredential:failure", Toast.LENGTH_SHORT).show();
                            if (task.getException() instanceof FirebaseAuthInvalidCredentialsException) {
                                Toast.makeText(FCMsmsTest.this, "The verification code entered was invalid", Toast.LENGTH_SHORT).show();
                            }
                        }
                    }
                });
    }

    private void showDialog() {
        AlertDialog.Builder alert = new AlertDialog.Builder(this);
        final EditText edittextCode = new EditText(FCMsmsTest.this);
        alert.setMessage("Enter Your Message");
        alert.setTitle("Enter Your Title");

        alert.setView(edittextCode);

        alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                String YouEditTextValueString = edittextCode.getText().toString();

                PhoneAuthCredential credential = PhoneAuthProvider.getCredential(mVerificationId, YouEditTextValueString);
                signInWithPhoneAuthCredential(credential);

            }
        });
        alert.show();
    }
}

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="50dp">

    <TableRow
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="+91" />

        <EditText
            android:id="@+id/edit_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="phone" />
    </TableRow>

    <Button
        android:id="@+id/btn_send_sms"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:text="Send OTP" />

</LinearLayout>

相应地更新您的项目。