Firebase Auth在android stuio中使应用程序崩溃[副本]

Question

03-29 19:26:37.449 176 02-17602/com.developerillusion.hive e/androidruntime：致命异常：main process：com.developerillusion.hive,pid：17602 java.lang.runtimeexception：无法启动活动ComponentInfo{com.developerillusion.hive/com.developerillusion.hive.registeractivity}：java.lang.IllegalStateException：Default FirebaseApp在此进程中未初始化。确保首先调用FirebaseApp.InitializeApp（上下文）。在Android.app.activitythread.performLaunchActivity（activitythread.java:2339)在Android.app.activitythread.java:2413)在Android.app.activitythread.access$800(activitythread.java:155)在Android.app.activitythread.java:1317)在Android.app.activitythread.dispatchmessage（activitythread.java:1317)在Android.os.handler.loop（looper.java:135)，在java.lang.reflect.Method.invoke(Method.java:372)，com.android.internal.os.zygoteinit.main(zygoteinit.java:700)的java.lang.reflect.Method.invoke(Method.java:372)，methodandargscaller.run(zygoteinit.java:905)，java.lang.IllegalStateException：默认FirebaseApp在此进程中未初始化com.developerIllusion.hive。确保首先调用FirebaseApp.InitializeApp（上下文）。在com.google.firebase.firebase.firebaseapp.getinstance（sourceFile:218)在com.google.firebase.auth.firebaseAuth.getinstance（未知来源）在com.developerillusion.hive.registeractivity.oncreate（registeractivity.java:35)在Android.app.activity.performcreate（activity.java:6010)在Android.app.instrumentation.callactivity.create（在Android.app.activitythread.access$800(activitythread.java:155) 在Android.app.activitythread$h.handleMessage(activitythread.java:1317) 在Android.os.handler.DispatchMessage(Handler.java:102) 在Android.os.looper.loop(looper.java:135) 在Android.app.activitythread.main（activitythread.java:5343) 在java.lang.reflect.Method.invoke（本机方法） 在java.lang.reflect.method.invoke(Method.java:372) 在com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:905) 在com.android.internal.os.zygoteinit.main(zygoteinit.java:700) 

        package com.developerillusion.hive;

import android.app.ProgressDialog;
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
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 RegisterActivity extends AppCompatActivity
{
    private Button CreateAccountButton;
    private EditText UserEmail, UserPassword;
    private TextView AlreadyHaveAccountLink;

    private FirebaseAuth mAuth;

    private ProgressDialog loadingBar;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        mAuth = FirebaseAuth.getInstance();


        InitializeFields();


        AlreadyHaveAccountLink.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                SendUserToLoginActivity();
            }
        });




        CreateAccountButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                CreateNewAccount();

            }
        });

    }

    private void CreateNewAccount()
    {
        String email = UserEmail.getText().toString();
        String password = UserPassword.getText().toString();


        if (TextUtils.isEmpty(email))
        {
            Toast.makeText(this, "Please enter your Email", Toast.LENGTH_SHORT).show();
        }

        if (TextUtils.isEmpty(password))
        {
            Toast.makeText(this, "Please enter your Password", Toast.LENGTH_SHORT).show();
        }
        else
        {
            loadingBar.setTitle("Creating New Account");
            loadingBar.setMessage("Please wait, while we are creating new account for you");
            loadingBar.setCanceledOnTouchOutside(true);
            loadingBar.show();

            mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task)
                {
                    if (task.isSuccessful())
                    {
                        SendUserToLoginActivity();
                        Toast.makeText(RegisterActivity.this, "Account Created Successfully", Toast.LENGTH_SHORT).show();
                        loadingBar.dismiss();
                    }
                    else
                    {
                        String message = task.getException().toString();
                        Toast.makeText(RegisterActivity.this, "Error: " + message, Toast.LENGTH_SHORT).show();
                        loadingBar.dismiss();
                    }

                }
            });
        }

    }

    private void InitializeFields()
    {
        CreateAccountButton = (Button) findViewById(R.id.register_button);
        UserEmail = (EditText) findViewById(R.id.register_email);
        UserPassword = (EditText) findViewById(R.id.register_password);
        AlreadyHaveAccountLink = (TextView) findViewById(R.id.already_have_account_link);

        loadingBar = new ProgressDialog(this);

    }

    private void SendUserToLoginActivity()
    {
        Intent loginIntent = new Intent(RegisterActivity.this, LoginActivity.class);
        startActivity(loginIntent);
    }
}

Answer 1

@Override
public void onCreate() {
super.onCreate();
FirebaseApp.initializeApp(this);

//rest of the code
}