小贝子编程

登录页面不会重定向到主活动页面



以下是与登录页面相关的代码，但由于某种原因，登录后它会将我重定向到注册页面，而不是代码中所述的主要活动。我还注意到；new View.OnClickListener(("以及"；new OnCompleteListener((&；变灰了，但我不确定会有什么影响。提前感谢您的协助。登录.java：

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
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 Login extends AppCompatActivity {
EditText mEmail,mPassword;
Button mLoginBtn;
TextView mCreateBtn;
ProgressBar progressBar;
FirebaseAuth fAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
mEmail = findViewById(R.id.Email);
mPassword = findViewById(R.id.Password);
progressBar = findViewById(R.id.progressBar);
fAuth = FirebaseAuth.getInstance();
mLoginBtn = findViewById(R.id.loginBtn);
mCreateBtn = findViewById(R.id.createText);
mLoginBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String email = mEmail.getText().toString().trim();
String password = mPassword.getText().toString().trim();
if(TextUtils.isEmpty(email)){
mEmail.setError("Email is Required");
return;
}
if(TextUtils.isEmpty(password)){
mPassword.setError("Password is Required");
return;
}
if(password.length() < 6){
mPassword.setError("Password Must be Greater Than 6 Characters");
return;
}
progressBar.setVisibility(View.VISIBLE);
//authenticate the user
fAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
Toast.makeText(Login.this, "Logged in Successfully", Toast.LENGTH_SHORT).show();
startActivity(new Intent(getApplicationContext(), MainActivity.class));
} else {
Toast.makeText(Login.this, "Error ! " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
}
}
});
}
});

mCreateBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), Register.class));
}
});
}
}

activity_login.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/gradient_background"
tools:context=".Login">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/abril_fatface"
android:text="Team D.4"
android:textColor="#0C0C0C"
android:textSize="25sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.13" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:fontFamily="@font/abril_fatface"
android:text="Sign in to your Account"
android:textColor="#0E0E0E"
android:textSize="15sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<EditText
android:id="@+id/Email"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:background="@color/white"
android:ems="10"
android:fontFamily="sans-serif-medium"
android:hint="Email"
android:inputType="textEmailAddress"
android:padding="10dp"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView2"
app:layout_constraintVertical_bias="0.17000002" />
<EditText
android:id="@+id/Password"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:background="@color/white"
android:ems="10"
android:fontFamily="sans-serif-medium"
android:hint="Password"
android:inputType="textPassword"
android:padding="10dp"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Email" />
<Button
android:id="@+id/loginBtn"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="32dp"
android:layout_marginEnd="16dp"
android:text="Login"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Password" />
<TextView
android:id="@+id/createText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="New Here? Create Account"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/loginBtn" />
<ProgressBar
android:id="@+id/progressBar2"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/createText" />
</androidx.constraintlayout.widget.ConstraintLayout>

activity_registration.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/gradient_background"
tools:context=".Register">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/abril_fatface"
android:text="Team D.4"
android:textColor="#0C0C0C"
android:textSize="25sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.13" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:fontFamily="@font/abril_fatface"
android:text="Create New Account"
android:textColor="#0E0E0E"
android:textSize="15sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<EditText
android:id="@+id/fullName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:background="@color/white"
android:ems="10"
android:fontFamily="sans-serif-medium"
android:hint="Full Name"
android:inputType="textPersonName"
android:padding="10dp"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView2"
app:layout_constraintVertical_bias="0.17000002" />
<EditText
android:id="@+id/Email"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:background="@color/white"
android:ems="10"
android:fontFamily="sans-serif-medium"
android:hint="Email"
android:inputType="textEmailAddress"
android:padding="10dp"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/fullName" />
<EditText
android:id="@+id/Password"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:background="@color/white"
android:ems="10"
android:fontFamily="sans-serif-medium"
android:hint="Password"
android:inputType="textPassword"
android:padding="10dp"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Email" />
<EditText
android:id="@+id/Phone"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:background="@color/white"
android:ems="10"
android:fontFamily="sans-serif-medium"
android:hint="Phone"
android:inputType="textPhonetic"
android:padding="10dp"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Password" />
<Button
android:id="@+id/registerBtn"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="32dp"
android:layout_marginEnd="16dp"
android:text="Register"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Phone" />
<TextView
android:id="@+id/createText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="Already Registered? Login Here"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/registerBtn" />
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/createText" />
</androidx.constraintlayout.widget.ConstraintLayout>

注册.java：

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.google.firebase.auth.FirebaseAuth;
public class Register extends AppCompatActivity {
EditText mFullName, mEmail, mPassword, mPhone;
Button mRegisterBtn;
TextView mLoginBtn;
FirebaseAuth fAuth;
ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
mFullName = findViewById(R.id.fullName);
mEmail = findViewById(R.id.Email);
mPassword = findViewById(R.id.Password);
mPhone = findViewById(R.id.Phone);
mRegisterBtn = findViewById(R.id.registerBtn);
mLoginBtn = findViewById(R.id.createText);
fAuth = FirebaseAuth.getInstance();
progressBar = findViewById(R.id.progressBar);
if(fAuth.getCurrentUser() !=null){
startActivity(new Intent(getApplicationContext(), MainActivity.class));
finish();
}
mRegisterBtn.setOnClickListener(v -> {
String email = mEmail.getText().toString().trim();
String password = mPassword.getText().toString().trim();
if(TextUtils.isEmpty(email)){
mEmail.setError("Email is Required");
return;
}
if(TextUtils.isEmpty(password)){
mPassword.setError("Password is Required");
return;
}
if(password.length() < 6){
mPassword.setError("Password Must be Greater Than 6 Characters");
return;
}
progressBar.setVisibility(View.VISIBLE);
//register the user in firebase
fAuth.createUserWithEmailAndPassword(email,password).addOnCompleteListener(task -> {
if(task.isSuccessful()){
Toast.makeText(Register.this, "User Created", Toast.LENGTH_SHORT).show();
startActivity(new Intent(getApplicationContext(), MainActivity.class));
}else {
Toast.makeText(Register.this, "Error ! " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
}
});
});

mLoginBtn.setOnClickListener(v -> startActivity(new Intent(getApplicationContext(), Login.class)));
}
}

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Logout"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
android:onClick="logout"/>
</androidx.constraintlayout.widget.ConstraintLayout>

主要活动.java：

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import com.google.firebase.auth.FirebaseAuth;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void logout(View view) {
FirebaseAuth.getInstance().signOut(); //logout user
startActivity(new Intent(getApplicationContext(), Login.class));
finish();
}
}

因此，首先，您登录的方式本身不起作用。[1] 如果您添加了密码长度为n的条件，那么在else语句中所有这些条件之后，您应该登录您的用户。同时，对寄存器活动也要执行同样的操作。[2] 接下来，我在意图中添加了一些标志，这样可以清除所有以前的活动，这些活动可能会阻止你的应用程序在点击登录后注册活动。如果不起作用，请告诉我。

public class Login extends AppCompatActivity {
EditText mEmail,mPassword;
Button mLoginBtn;
TextView mCreateBtn;
ProgressBar progressBar;
FirebaseAuth fAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
mEmail = findViewById(R.id.Email);
mPassword = findViewById(R.id.Password);
progressBar = findViewById(R.id.progressBar);
fAuth = FirebaseAuth.getInstance();
mLoginBtn = findViewById(R.id.loginBtn);
mCreateBtn = findViewById(R.id.createText);
mLoginBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String email = mEmail.getText().toString().trim();
String password = mPassword.getText().toString().trim();
if(TextUtils.isEmpty(email)){
mEmail.setError("Email is Required");
return;
}
if(TextUtils.isEmpty(password)){
mPassword.setError("Password is Required");
return;
}
if(password.length() < 6){
mPassword.setError("Password Must be Greater Than 6 Characters");
return;
} else{                   //[1]
loginuser();
progressBar.setVisibility(View.VISIBLE);  
}
});



mCreateBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), Register.class));
}
});
}
private void loginuser(String email, String password){
[2]
fAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
Toast.makeText(Login.this, "Logged in Successfully", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Login.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
} else {
Toast.makeText(Login.this, "Error ! " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
}
}
});
}
}

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