尝试在Android Studio中使用Firebase使用电子邮件和密码进行注册时出错 [英] Error while trying to sign up using email and password using firebase in android studio

问题描述

尝试在android studio中运行此代码时遇到此错误:

I am having this error while trying to run this code in android studio:

错误:

2019-02-07 20:16:50.708 30406-30406/? E/Zygote: isWhitelistProcess - Process is Whitelisted
2019-02-07 20:16:50.708 30406-30406/? E/libpersona: scanKnoxPersonas
2019-02-07 20:16:50.709 30406-30406/? E/libpersona: Couldn't open the File - /data/system/users/0/personalist.xml - No such file or directory
2019-02-07 20:17:05.426 30406-30406/com.example.servicees E/ViewRootImpl: sendUserActionEvent() returned.
2019-02-07 20:17:25.789 30406-30406/com.example.servicees E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.servicees, PID: 30406
    java.lang.IllegalArgumentException: Given String is empty or null
        at com.google.android.gms.common.internal.Preconditions.checkNotEmpty(Unknown Source:5)
        at com.google.firebase.auth.FirebaseAuth.createUserWithEmailAndPassword(Unknown Source:232)
        at com.example.servicees.MainActivity$1.onClick(MainActivity.java:78)
        at android.view.View.performClick(View.java:6909)
        at android.widget.TextView.performClick(TextView.java:12693)
        at android.view.View$PerformClick.run(View.java:26199)
        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:6944)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

代码:

package com.example.servicees;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
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;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.hbb20.CountryCodePicker;

public class MainActivity extends AppCompatActivity {


    EditText etName, etService, etDes, etCost, etContact, etPass, etEmail;
    Button offer;
    CountryCodePicker ccp;
    private FirebaseAuth mAuth;

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

        etName = findViewById(R.id.enterName);
        etService = findViewById(R.id.enterService);
        etDes = findViewById(R.id.enterDescription);
        etCost = findViewById(R.id.enterCost);
        etContact = findViewById(R.id.enterContact);
        etPass = findViewById(R.id.enterPassword);
        etEmail = findViewById(R.id.enterEmail);
        ccp = findViewById(R.id.ccpLogin);

        /*final String putName=etName.getText().toString();
        final String putService=etService.getText().toString();
        final String putDes=etDes.getText().toString();
        final String putCost=etCost.getText().toString();
        //final String putPass=etPass.getText().toString();
        final String putEmail=etEmail.getText().toString();
        final String putPass=etPass.getText().toString();*/


        ccp.registerCarrierNumberEditText(etContact);

        //final String fullNumber = ccp.getFullNumberWithPlus();

        offer = findViewById(R.id.offerBtn);

        mAuth=FirebaseAuth.getInstance();

        offer.setOnClickListener(new View.OnClickListener() {
             String putName=etName.getText().toString().trim();
             String putService=etService.getText().toString().trim();
             String putDes=etDes.getText().toString().trim();
             String putCost=etCost.getText().toString().trim();
             String putEmail=etEmail.getText().toString().trim();
             String putPass=etPass.getText().toString().trim();
             //ccp.registerCarrierNumberEditText(etContact);

             String fullNumber = ccp.getFullNumberWithPlus();

            @Override
            public void onClick(View v) {
                if(notEmpty()){
                mAuth.createUserWithEmailAndPassword(putEmail, putPass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful())
                        {
                            User user = new User(putName, putService, putDes, putCost, fullNumber, putPass, putEmail);
                            FirebaseDatabase.getInstance().getReference("Users").child(putEmail).setValue(user);
                            Toast.makeText(MainActivity.this, "Registered", Toast.LENGTH_LONG).show();
                        }
                        else
                            Toast.makeText(MainActivity.this, "Failed", Toast.LENGTH_LONG).show();
                    }
                });
                }
                else
                    Toast.makeText(MainActivity.this, "All Fields Are Required", Toast.LENGTH_LONG).show();
            }
        });
    }


    public boolean notEmpty() {
        Boolean checker;
        String checkEmName = etName.getText().toString();
        String checkEmService = etService.getText().toString();
        String checkEmDes = etDes.getText().toString();
        String checkEmCost = etCost.getText().toString();
        String fullNumberCh = ccp.getFullNumberWithPlus();
        String checkEmEmail = etEmail.getText().toString();
        String checkEmPass = etPass.getText().toString();
        if (checkEmName.isEmpty() || checkEmService.isEmpty() || checkEmDes.isEmpty() || checkEmCost.isEmpty() || fullNumberCh.isEmpty() || checkEmEmail.isEmpty() || checkEmPass.isEmpty())
            checker = false;
        else
            checker = true;
        return checker;
    }
}

推荐答案

您需要将每个 getText().toString()都移到 onClick 中.

You need to move each of those getText().toString() into the onClick.

否则，在将点击侦听器附加到按钮时(即在您键入任何文本之前)，您会得到空字符串

Otherwise, you are getting empty strings upon attaching the click listener to the button (i.e. before you type any text)

此外，您可能希望查看 Android TextUtils isEmpty与String.isEmpty

Also, you might want to see Android TextUtils isEmpty vs String.isEmpty

这篇关于尝试在Android Studio中使用Firebase使用电子邮件和密码进行注册时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！