I am new to android, i was following some tutorial and at this point, app keeps crashing when i click the login button. When i run the app and click the login button, the app crashes and in the logcat, it shows this error of java RuntimeException. This is my logcat, loginactivity.xml and loginactivity.java.
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ugtunda/com.example.ugtunda.LoginActivity}: java.lang.ClassCastException: androidx.appcompat.widget.AppCompatTextView cannot be cast to com.rey.material.widget.TextView at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2806) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2884) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1614) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6524) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:451) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:888) Caused by: java.lang.ClassCastException: androidx.appcompat.widget.AppCompatTextView cannot be cast to com.rey.material.widget.TextView at com.example.ugtunda.LoginActivity.onCreate(LoginActivity.java:48) at android.app.Activity.performCreate(Activity.java:7044) at android.app.Activity.performCreate(Activity.java:7035) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2759)
Here is my login_activity_XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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/login"
tools:context=".LoginActivity">
<ImageView
android:id="@+id/login_applogo"
android:layout_width="300dp"
android:layout_height="100dp"
android:src="@drawable/applogo"
android:layout_centerHorizontal="true"
android:layout_marginTop="200dp"
/>
<EditText
android:id="@+id/login_phone_number_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/login_applogo"
android:background="@drawable/input_design"
android:padding="20dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:hint="Phone Number"
android:inputType="number"
android:textColor="@color/colorPrimaryDark"
android:textColorHint="@color/colorPrimaryDark"
android:textSize="17sp"
android:textStyle="bold"
/>
<EditText
android:id="@+id/login_password_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/login_phone_number_input"
android:background="@drawable/input_design"
android:padding="20dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="6dp"
android:hint="Password"
android:inputType="textPassword"
android:textColor="@color/colorPrimaryDark"
android:textColorHint="@color/colorPrimaryDark"
android:textSize="17sp"
android:textStyle="bold"
/>
<LinearLayout
android:id="@+id/linear_layout_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="@id/login_password_input"
android:layout_marginTop="5dp"
>
<com.rey.material.widget.CheckBox
android:id="@+id/remember_me_chkb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/Material.Drawable.CheckBox"
android:text="Remember Me"
android:textColor="@color/colorPrimaryDark"
app:cbd_strokeColor="@color/colorPrimaryDark"
android:gravity="center_vertical"
android:textSize="16sp"
android:textStyle="bold"
android:layout_marginLeft="17dp"
/>
<TextView
android:id="@+id/forget_password_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Forget Password"
android:textColor="@color/colorPrimaryDark"
android:textSize="15sp"
android:textStyle="bold"
android:layout_marginLeft="80dp"
/>
</LinearLayout>
<Button
android:id="@+id/login_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/linear_layout_1"
android:layout_marginTop="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:background="@drawable/buttons"
android:padding="17dp"
android:text="Login"
android:textAllCaps="false"
android:textColor="@android:color/white"
android:textSize="18sp" />
<TextView
android:id="@+id/admin_panel_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/login_button"
android:layout_alignParentEnd="true"
android:layout_marginLeft="80dp"
android:layout_marginEnd="23dp"
android:text="I'm an Admin"
android:textAppearance="@android:style/TextAppearance.Material.Small"
android:textColor="@color/colorPrimaryDark"
android:textSize="20sp"
android:textStyle="bold" />
<TextView
android:id="@+id/not_admin_panel_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="I'm not an Admin"
android:layout_alignParentStart="true"
android:layout_below="@+id/login_button"
android:textColor="@color/colorPrimaryDark"
android:textSize="20sp"
android:textStyle="bold"
android:layout_marginLeft="80dp"
android:layout_marginEnd="23dp"
android:layout_marginStart="25dp"
android:visibility="invisible"
/>
</RelativeLayout>
And lastly my loginactivity.java
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
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.Toast;
import com.example.ugtunda.Models.Users;
import com.example.ugtunda.Prevalent.Prevalent;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.rey.material.widget.CheckBox;
import com.rey.material.widget.TextView;
import io.paperdb.Paper;
public class LoginActivity extends AppCompatActivity
{
private EditText InputPhoneNumber, InputPassword;
private Button LoginButton;
private ProgressDialog loadingBar;
private TextView AdminLink, NotAdminLink;
private String parentDbName = "Users";
private CheckBox chkBoxRememberMe;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
LoginButton = findViewById(R.id.login_button);
InputPassword = findViewById(R.id.login_password_input);
InputPhoneNumber = findViewById(R.id.login_phone_number_input);
AdminLink = findViewById(R.id.admin_panel_link);
NotAdminLink = findViewById(R.id.not_admin_panel_link);
loadingBar = new ProgressDialog(this);
chkBoxRememberMe = findViewById(R.id.remember_me_chkb);
Paper.init(this);
LoginButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
LoginUser();
}
});
AdminLink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
LoginButton.setText("Login Admin");
AdminLink.setVisibility(View.INVISIBLE);
NotAdminLink.setVisibility(View.VISIBLE);
parentDbName = "Admins";
}
});
NotAdminLink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
LoginButton.setText("Login");
AdminLink.setVisibility(View.VISIBLE);
NotAdminLink.setVisibility(View.INVISIBLE);
parentDbName = "Users";
}
});
}
private void LoginUser()
{
String phone = InputPhoneNumber.getText().toString();
String password = InputPassword.getText().toString();
if (TextUtils.isEmpty(phone))
{
Toast.makeText(this, "Please write your phone number...", Toast.LENGTH_SHORT).show();
}
else if (TextUtils.isEmpty(password))
{
Toast.makeText(this, "Please write your password...", Toast.LENGTH_SHORT).show();
}
else
{
loadingBar.setTitle("Login Account");
loadingBar.setMessage("Please wait, while we are checking the credentials.");
loadingBar.setCanceledOnTouchOutside(false);
loadingBar.show();
AllowAccessToAccount(phone, password);
}
}
private void AllowAccessToAccount(final String phone, final String password)
{
if(chkBoxRememberMe.isChecked())
{
Paper.book().write(Prevalent.USER_PHONE_KEY, phone);
Paper.book().write(Prevalent.USER_PASSWORD_KEY, password);
}
final DatabaseReference RootRef;
RootRef = FirebaseDatabase.getInstance().getReference();
RootRef.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot)
{
if (dataSnapshot.child(parentDbName).child(phone).exists())
{
Users usersData = dataSnapshot.child(parentDbName).child(phone).getValue(Users.class);
if (usersData.getPhone().equals(phone))
{
if (usersData.getPassword().equals(password))
{
if (parentDbName.equals("Admins"))
{
Toast.makeText(LoginActivity.this, "Welcome Admin, you are logged in Successfully...", Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
Intent intent = new Intent(LoginActivity.this, AdminCategoryActivity.class);
startActivity(intent);
}
else if (parentDbName.equals("Users"))
{
Toast.makeText(LoginActivity.this, "logged in Successfully...", Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
Intent intent = new Intent(LoginActivity.this, HomeActivity.class);
Prevalent.currentOnlineUser = usersData;
startActivity(intent);
}
}
else
{
loadingBar.dismiss();
Toast.makeText(LoginActivity.this, "Password is incorrect.", Toast.LENGTH_SHORT).show();
}
}
}
else
{
Toast.makeText(LoginActivity.this, "Account with this " + phone + " number do not exists.", Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
It looks like you're defining standard Android components in the XML layout, then attempting to inflate them into custom components (the com.rey.material package). Try going into your imports and deleting the com.rey.material lines. Then when your IDE prompts you to import the TextView and Checkbox, make sure you're importing the versions from android.widget, not com.rey.material. Alternatively, you could change your XML file to specify the com.rey.material components if you wanted to be using those instead of the default ones.