使用android的Firebase电子邮件和密码认证-用户注册

Question

最近为我的应用程序创建了一个简单的注册页面，该页面接受电子邮件和密码这两个值，检查它们是否有效，然后将它们传递给firebase函数来创建用户。值被正确传递，然而，我总是得到消息说“注册失败”。firebase连接是活动的，我已经允许用户使用电子邮件和密码认证注册。

我觉得这是我的build.gradle文件的一个问题，可能有错误的依赖关系，但是，我是Firebase的新手，无法解决这个问题。

下面是我的注册表单，build.gradle文件和控制台错误日志。任何帮助都将不胜感激。

注册表

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
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.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;

public class RegisterPage extends AppCompatActivity {


private EditText userEmail,userPassword;
private Button regButton;
private FirebaseAuth firebaseAuth;



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

    firebaseAuth = FirebaseAuth.getInstance();

    regButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if (validate()){

                //Upload Data to the database

                String user_email = userEmail.getText().toString().trim();
                String user_password = 
 userPassword.getText().toString().trim();

                firebaseAuth.createUserWithEmailAndPassword(user_email,user_password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                public void onComplete(@NonNull Task<AuthResult> task) {

                       if(task.isSuccessful()){
                        Toast.makeText(RegisterPage.this, "Registration Complete", Toast.LENGTH_SHORT).show();
                       startActivity(new Intent(RegisterPage.this,MainActivity.class));
                    }



                   else {

                          // FirebaseAuthException e = (FirebaseAuthException)task.getException();
                      // Toast.makeText(RegisterPage.this,"Failed Registation: "+e.getMessage(),Toast.LENGTH_SHORT).show();


                            Toast.makeText(RegisterPage.this, "Registration Failed", Toast.LENGTH_SHORT).show();
                        }

                   }
                });
            }

        }
    });

}


private void setUpUIViews(){

    userEmail = (EditText)findViewById(R.id.Email_Register);
    userPassword = (EditText)findViewById(R.id.Password_Register);
    regButton = (Button)findViewById(R.id.Register_btn);
}

private Boolean validate(){

    Boolean result = false;

    String email = userEmail.getText().toString();
    String password = userPassword.getText().toString();

    if (email.isEmpty() && password.isEmpty()){

        Toast.makeText(this,"Please enter all your details correctly", Toast.LENGTH_SHORT).show();

    }

    else {

        result = true;


    }

    return result;

}


}

repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.0.1'



    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
    classpath 'com.google.gms:google-services:3.1.0'
}
}

allprojects {
repositories {
    google()
    jcenter()

    //added maven
    maven {
        url "https://maven.google.com" // Google's Maven repository
    }
}
}

 task clean(type: Delete) {
delete rootProject.buildDir
}

apply plugin: 'com.android.application'

android {
compileSdkVersion 26
defaultConfig {
    applicationId "com.example.bradwaterhouse.discovernottingham"
    minSdkVersion 15
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.google.firebase:firebase-database:11.0.4'
implementation 'com.google.firebase:firebase-auth:11.0.4'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
//added in
compile 'com.google.firebase:firebase-auth:11.0.4'
}


apply plugin: 'com.google.gms.google-services'

这是如果在else循环中替换“登录失败”文本时得到的错误消息。

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.example.bradwaterhouse.discovernottingham, PID: 4473
              java.lang.ClassCastException: com.google.firebase.FirebaseException cannot be cast to com.google.firebase.auth.FirebaseAuthException
                  at com.example.bradwaterhouse.discovernottingham.RegisterPage$1$1.onComplete(RegisterPage.java:59)
                  at com.google.android.gms.tasks.zzf.run(Unknown Source:23)
                  at android.os.Handler.handleCallback(Handler.java:789)
                  at android.os.Handler.dispatchMessage(Handler.java:98)
                  at android.os.Looper.loop(Looper.java:164)
                  at android.app.ActivityThread.main(ActivityThread.java:6541)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Application terminated.

Answer 1

在与OP交谈后，错误是：

为了解决这个问题，他必须启用google identity toolkit API。

此外，最好加上下面的内容，以便能够知道到底是什么问题：

在你的else中加上这个，你会得到更清楚的错误：

Toast.makeText(RegisterPage.this, "User Authentication Failed: " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();

或将其添加到日志中：

Log.i("error is :", task.getException().getMessage());