I've built an app for user authentication.
My app is crashing when I'm calling a setOnClickListener with Intent filter.
MainActivity.Java:
package com.example.passiveincome;
import android.content.Intent;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
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 MainActivity extends AppCompatActivity {
public EditText emailId, passwd;
Button btnSignUp;
TextView signIn;
FirebaseAuth firebaseAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
firebaseAuth = FirebaseAuth.getInstance();
emailId = findViewById(R.id.ETemail);
passwd = findViewById(R.id.ETpassword);
btnSignUp = findViewById(R.id.btnSignUp);
signIn = findViewById(R.id.TVSignIn);
btnSignUp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String emailID = emailId.getText().toString();
String paswd = passwd.getText().toString();
if (emailID.isEmpty()) {
emailId.setError("Provide your Email first!");
emailId.requestFocus();
} else if (paswd.isEmpty()) {
passwd.setError("Set your password");
passwd.requestFocus();
} else if (emailID.isEmpty() && paswd.isEmpty()) {
Toast.makeText(MainActivity.this, "Fields Empty!", Toast.LENGTH_SHORT).show();
} else if (!(emailID.isEmpty() && paswd.isEmpty())) {
firebaseAuth.createUserWithEmailAndPassword(emailID, paswd).addOnCompleteListener(MainActivity.this, new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
if (!task.isSuccessful()) {
Toast.makeText(MainActivity.this.getApplicationContext(),
"SignUp unsuccessful: " + task.getException().getMessage(),
Toast.LENGTH_SHORT).show();
} else {
startActivity(new Intent(MainActivity.this, RegistrationActivity.class));
}
}
});
} else {
Toast.makeText(MainActivity.this, "Error", Toast.LENGTH_SHORT).show();
}
}
});
signIn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent I = new Intent(MainActivity.this, LoginActivity.class);
startActivity(I);
}
});
}
}
The crash is happening when I'm transitioning from MainActivity class to LoginActivity class.
LoginActivity class:
package com.example.passiveincome;
import android.content.Intent;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
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;
import com.google.firebase.auth.FirebaseUser;
public class LoginActivity extends AppCompatActivity {
public EditText loginEmailId, logInpasswd;
Button btnLogIn;
TextView signup;
FirebaseAuth firebaseAuth;
private FirebaseAuth.AuthStateListener authStateListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
firebaseAuth = FirebaseAuth.getInstance();
loginEmailId = findViewById(R.id.loginEmail);
logInpasswd = findViewById(R.id.loginpaswd);
btnLogIn = findViewById(R.id.btnLogIn);
signup = findViewById(R.id.TVSignIn);
authStateListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
Toast.makeText(LoginActivity.this, "User logged in ", Toast.LENGTH_SHORT).show();
Intent I = new Intent(LoginActivity.this, RegistrationActivity.class);
startActivity(I);
} else {
Toast.makeText(LoginActivity.this, "Login to continue", Toast.LENGTH_SHORT).show();
}
}
};
signup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent I = new Intent(LoginActivity.this, MainActivity.class);
startActivity(I);
}
});
btnLogIn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String userEmail = loginEmailId.getText().toString();
String userPaswd = logInpasswd.getText().toString();
if (userEmail.isEmpty()) {
loginEmailId.setError("Provide your Email first!");
loginEmailId.requestFocus();
} else if (userPaswd.isEmpty()) {
logInpasswd.setError("Enter Password!");
logInpasswd.requestFocus();
} else if (userEmail.isEmpty() && userPaswd.isEmpty()) {
Toast.makeText(LoginActivity.this, "Fields Empty!", Toast.LENGTH_SHORT).show();
} else if (!(userEmail.isEmpty() && userPaswd.isEmpty())) {
firebaseAuth.signInWithEmailAndPassword(userEmail, userPaswd).addOnCompleteListener(LoginActivity.this, new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
if (!task.isSuccessful()) {
Toast.makeText(LoginActivity.this, "Not sucessfull", Toast.LENGTH_SHORT).show();
} else {
startActivity(new Intent(LoginActivity.this, RegistrationActivity.class));
}
}
});
} else {
Toast.makeText(LoginActivity.this, "Error", Toast.LENGTH_SHORT).show();
}
}
});
}
@Override
protected void onStart() {
super.onStart();
firebaseAuth.addAuthStateListener(authStateListener);
}
}
Here is the log file with error only:
2021-09-13 20:24:21.222 11737-11776/com.example.passiveincome E/eglCodecCommon: GoldfishAddressSpaceHostMemoryAllocator: ioctl_ping failed for device_type=5, ret=-1
2021-09-13 20:24:26.961 11737-11737/com.example.passiveincome E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.passiveincome, PID: 11737
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.passiveincome/com.example.passiveincome.LoginActivity}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2005)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1673)
at android.app.Activity.startActivityForResult(Activity.java:4586)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:676)
at android.app.Activity.startActivityForResult(Activity.java:4544)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:663)
at android.app.Activity.startActivity(Activity.java:4905)
at android.app.Activity.startActivity(Activity.java:4873)
at com.example.passiveincome.MainActivity$2.onClick(MainActivity.java:69)
at android.view.View.performClick(View.java:6597)
at android.view.View.performClickInternal(View.java:6574)
at android.view.View.access$3100(View.java:778)
at android.view.View$PerformClick.run(View.java:25885)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
The app crashes before I could see the LoginActivity layout.
Copyright Notice：Content Author:「user16461665」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/69166213/android-app-keeps-crashing-when-performing-user-authentication