Can anyone help me fix this problem? Everything seems fine. My xml and java looks normal but I can't seem to find what is wrong with the error. I already tried invalidating my cache and cleaning the project but the error is still there. Is there anyway I can fix this problem?
My Problem: Cannot resolve symbol 'activity_main'
MainActivity
package com.example.machineproblem2;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.app.Activity;
import android.view.ContextMenu;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.os.Bundle;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lbl_msg"
android:textAppearance="?android:attr/textAppearanceLarge"/>
<EditText
android:id="@+id/etMsg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/lbl_msg">
<requestFocus/>
</EditText>
<Button
android:id="@+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/btn_send"
android:onClick="doNextActivity"/>
<TextView
android:id="@+id/tvContext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/msg"
android:textAppearance="?android:attr/textAppearanceLarge"
/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
