java - 如何使用 Firebase 身份验证 android studio 使用电子邮件和密码进行注册

Question

我正在尝试使用带有电子邮件和密码的 firebase 进行注册，但是当我在注册按钮上添加 onclicklistner 并尝试注册并运行应用程序时，Gradle 构建已成功运行，但应用程序崩溃了这里的代码中没有错误注册代码活动：

公共类 SignUpActivity 扩展 AppCompatActivity {

ActivitySignUpBinding binding;
private FirebaseAuth mAuth;
FirebaseDatabase database;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    binding = ActivitySignUpBinding.inflate(getLayoutInflater());
    setContentView(binding.getRoot());

    getSupportActionBar().setTitle("Sign Up");
    // Initialize Firebase Auth
    mAuth = FirebaseAuth.getInstance();
    database= FirebaseDatabase.getInstance();


    binding.SignUpBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
         mAuth.createUserWithEmailAndPassword(binding.EmailTv.getText().toString() ,binding.PasswordTv.
                 getText().toString()).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
             @Override
             public void onComplete(@NonNull Task<AuthResult> task) {
                 if(task.isSuccessful()){
                     Toast.makeText(SignUpActivity.this, "User created successfully",
                             Toast.LENGTH_SHORT).show();
                 }
                 else{
                     Toast.makeText(SignUpActivity.this, task.getException().getMessage(),
                             Toast.LENGTH_SHORT).show();
                 }
             }
         });
        }
    });



   binding.alreadyHaveAccount.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent=new Intent(SignUpActivity.this, SignInActivity.class);
            startActivity(intent);
        }
    });

}

}

Gradle 构建应用程序级别：

plugins {
id 'com.android.application'
id 'com.google.gms.google-services'

}

android { compileSdk 30

defaultConfig {
    applicationId "com.example.myapplication"
    minSdk 16
    targetSdk 30
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}
buildFeatures {
    viewBinding true
}
compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

}

依赖{

implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
//implementation 'com.google.firebase:firebase-auth:21.0.1'
    // Import the BoM for the Firebase platform
    implementation platform('com.google.firebase:firebase-bom:28.3.0')
   // Declare the dependency for the Firebase Authentication library
    // When using the BoM, you don't specify versions in Firebase library dependencies
    implementation 'com.google.firebase:firebase-auth'
    implementation 'com.google.firebase:firebase-database'

}

日志代码：

  Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.example.myapplication. Make sure to call FirebaseApp.initializeApp(Context) first.
    at com.google.firebase.FirebaseApp.getInstance(FirebaseApp.java:183)
    at com.google.firebase.auth.FirebaseAuth.getInstance(com.google.firebase:firebase-auth@@21.0.1:1)
    at com.example.myapplication.SignUpActivity.onCreate(SignUpActivity.java:32)
    at android.app.Activity.performCreate(Activity.java:6915)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2746)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2864) 
    at android.app.ActivityThread.-wrap12(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567) 
    at android.os.Handler.dispatchMessage(Handler.java:105) 
    at android.os.Looper.loop(Looper.java:156) 
    at android.app.ActivityThread.main(ActivityThread.java:6523) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:942) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832) 



  

.当我从注册按钮中删除 onclicklistner 时，应用程序启动。请帮我解决这个问题。

标签： javaandroidfirebasefirebase-authentication