通过电子邮件和密码使用firebase注册用户?

我使用Firebase授权创建了注册活动,并试图注册新用户,但当我按下注册按钮时,我的代码出现异常

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_register);
    etUsername = (EditText) findViewById(R.id.etUserName);
    etEmail = (EditText) findViewById(R.id.etEmailRegiter);
    etPassword = (EditText) findViewById(R.id.etPasswordRegiter);
    etPasswordRe = (EditText) findViewById(R.id.etPasswordRegiterRe);

    register = (Button) findViewById(R.id.btnRegister);

    passwordRule = (LinearLayout) findViewById(R.id.password_rule);

    etPassword.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            passwordRule.setVisibility(View.VISIBLE);
        }
    });

    mAuth = FirebaseAuth.getInstance();
    register.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            createAccount(etUsername.getText().toString(), etPassword.getText().toString());
        }
    });

}

private void createAccount(String email, String password) {
    Log.d(LOG_TAG, "createAccount:" + email);
//        if (!validateForm()) {
//            return;
//        }

    mAuth.createUserWithEmailAndPassword(email, password)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        Log.d(LOG_TAG, "createUserWithEmail:success");
                        FirebaseUser user = mAuth.getCurrentUser();

                        Log.d(LOG_TAG, ":" + mDatabase.child(PATH_TO_DATA_USERS));

//                            sendEmailVerification();
//                            Intent intent = new Intent(getContext(), MainActivity.class);
//                            intent.putExtra("user", user.getUid());
//                            startActivity(intent);
                        }
                         else {
                            try {
                                throw task.getException();
                            } catch(FirebaseAuthWeakPasswordException e) {
                                etPassword.setError("weak password");
                                etPassword.requestFocus();
                            } catch(FirebaseAuthInvalidCredentialsException e) {
                                etEmail.setError("invalid credential exception");
                                etEmail.requestFocus();
                            } catch(FirebaseAuthUserCollisionException e) {
                                etEmail.setError("collision exception");
                                etEmail.requestFocus();
                            } catch(Exception e) {
                                Log.e(LOG_TAG, e.getMessage());
                            }
                            Log.w(LOG_TAG, "createUserWithEmail:failure", task.getException());
                            Log.d(LOG_TAG, ":" + (mAuth == null));
                            Toast.makeText(RegisterActivity.this, "Authentication failed.",
                                    Toast.LENGTH_SHORT).show();
                        }

                    }
                });
    }

xml代码:

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_marginTop="50dp"
        >
        <EditText
            android:id="@+id/etUserName"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_width="match_parent"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:hint="@string/hint_user_name"/>
        <EditText
            android:id="@+id/etEmailRegiter"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_width="match_parent"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:hint="@string/hint_email"/>
        <EditText
            android:id="@+id/etPasswordRegiter"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_width="match_parent"
            android:layout_weight="1"
            android:hint="@string/hint_password"
            android:inputType="textPassword"
            android:layout_height="wrap_content"/>
        <EditText
            android:id="@+id/etPasswordRegiterRe"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_width="match_parent"
            android:layout_weight="1"
            android:hint="@string/hint_password_re"
            android:inputType="textPassword"
            android:layout_height="wrap_content"/>

    </LinearLayout>
    <LinearLayout
        android:id="@+id/password_rule"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:visibility="gone">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/password_rule"
            android:layout_marginLeft="17dp"
            android:layout_marginRight="17dp"
            android:layout_marginTop="5dp"
            android:textSize="17sp"/>
    </LinearLayout>
    <Button
        android:id="@+id/btnRegister"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:text="@string/button_register"/>

</LinearLayout>

在日志中得到这样的错误

E/Volley: [187] BasicNetwork.performRequest: Unexpected response code 400 for https://www.googleapis.com/identitytoolkit/v3/relyingparty/signupNewUser?key=AIzaSyAPBVdM4hZpPBvTZrvE9gBjld0otb202Lg
I/AuthChimeraService: Error description received from server: {
  "error": {
   "errors": [
    {
     "domain": "global",
     "reason": "invalid",
     "message": "INVALID_EMAIL"
    }
   ],
   "code": 400,
   "message": "INVALID_EMAIL"
  }
 }

这是我的gradle依存关系

compile 'com.google.firebase:firebase-database:10.0.1'
compile 'com.google.firebase:firebase-core:10.0.1'
compile 'com.google.firebase:firebase-auth:10.0.1'