Question

我正在使用Firebase开发一个Android应用程序，但是该应用程序在没有Firebase的情况下也可以正常工作，最糟糕的是android studio没有显示错误，但是在添加Firebase身份验证后该应用程序崩溃了。有什么问题吗？任何帮助表示赞赏。

我尝试更改firebase的版本，尝试更改Gradle文件，并在firebase中创建了其他项目，以查看是否有任何改变

package com.example.manual;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.widget.EditText;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class MainActivity extends AppCompatActivity {
EditText e1,e2;

FirebaseAuth mAuth ;
FirebaseUser currentUser;

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


    //e1 = (EditText) findViewById(R.id.edit)
    mAuth = FirebaseAuth.getInstance();
    currentUser = mAuth.getCurrentUser();

}

@Override
public void onStart() {
    super.onStart();
    // Check if user is signed in (non-null) and update UI accordingly.

    if(currentUser == null){


        Intent startIntent = new 
 Intent(MainActivity.this,RegisterActivity.class);
        startActivity(startIntent);
        finish();
    }

    }



}


Gradele file 
apply plugin: 'com.android.application'

android {
compileSdkVersion 28
defaultConfig {
    applicationId "com.example.manual"
    minSdkVersion 15
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner 
 "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android- 
optimize.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.google.firebase:firebase-core:16.0.1'
implementation 'com.google.firebase:firebase-auth:16.0.1'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-

核心：3.0.2' }

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




Project manual file

// Top-level build file where you can add configuration options common to 
all sub-projects/modules.

buildscript {
repositories {
    google()
    jcenter()

}
dependencies {
    classpath 'com.android.tools.build:gradle:3.3.0'
    classpath 'com.google.gms:google-services:4.1.0'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
  }
}

allprojects {
repositories {
    google()
    jcenter()
    maven { url 'https://maven.google.com' }

}
}

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

在Firebase助手窗口中，

表示已连接，但仍然每次尝试在真实设备上运行应用程序时，应用程序崩溃？请帮忙不要判断我，我只是开始自学。

Answer 1

尝试在gradle文件中升级到'com.google.firebase:firebase-core:16.0.7'和'com.google.firebase:firebase-auth:16.1.0'。

如果您注释掉startActivity(startIntent); finish();，应用程序还会崩溃吗？

添加Firebase身份验证后，Android应用崩溃

1 个答案: