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How do I change color of selected TextInputEditText inside a Dialog and the positive and negative buttons text?

I am quite new to MaterialAlertDialogBuilder in android and I getting a purple default color for actively selected TextIputEditText. I need to change the color of inputs when active to my own color, say maybe teal or green... and also the color for the action buttons on the dialog.
Here below is some code:
package com.indupendo.landing.ui.dialogs;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.DialogFragment;
import com.google.android.material.dialog.MaterialAlertDialogBuilder;
import com.indupendo.R;
import com.indupendo.databinding.DialogLoginBinding;
import com.indupendo.globals.utilities.Utils;
public class LoginDialog extends DialogFragment {
DialogLoginBinding binding;
View view;
public LoginDialog(View view) {
this.view = view;
}
#NonNull
#Override
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
binding = DialogLoginBinding.inflate(getLayoutInflater());
MaterialAlertDialogBuilder dialogBuilder = new MaterialAlertDialogBuilder(requireActivity(),
R.style.MaterialAlertDialog_rounded);
dialogBuilder.setView(binding.getRoot());
dialogBuilder.setNegativeButton("Cancel", (dialog, which) -> {
Utils.INSTANCE.showLoginCancellationSnackBar(view, getLayoutInflater());
dialog.cancel();
});
dialogBuilder.setPositiveButton("Login", (dialog, which) -> Toast.makeText(
getActivity(),
"Logged In",
Toast.LENGTH_LONG).show());
return dialogBuilder.create();
}
#Override
public void onCancel(#NonNull DialogInterface dialog) {
super.onCancel(dialog);
Utils.INSTANCE.showLoginCancellationSnackBar(view, getLayoutInflater());
dialog.cancel();
}
}
Layout 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"
android:id="#+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/tv_login_dialog_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/login_dialog_title"
android:textAlignment="center"
android:textColor="#color/maroon"
android:textSize="32sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/til_email_user_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
app:boxBackgroundColor="#android:color/transparent"
app:startIconDrawable="#drawable/ic_baseline_email_24"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/tv_login_dialog_title">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/ti_et_email_user_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="bottom"
android:hint="#string/field_hint_email"
android:inputType="textEmailAddress" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/til_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
app:boxBackgroundColor="#android:color/transparent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/til_email_user_id"
app:startIconDrawable="#drawable/ic_baseline_lock_24"
>
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/ti_et_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="bottom"
android:hint="#string/field_hint_password" />
</com.google.android.material.textfield.TextInputLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
And here is the Theme
<!--- Alert Dialog Theme -->
<style name="MaterialAlertDialog_rounded" parent="#style/ThemeOverlay.MaterialComponents.MaterialAlertDialog">
<item name="shapeAppearanceOverlay">#style/DialogCorners</item>
</style>

Inconvertible type: android.view.View to androidtutorial.project.nightclock.Classes.TextClock

I have a text clock in the layout that I initialize here but during initialization, I have a message of (Inconvertible type: android.view.View to androidtutorial.project.nightclock.Classes.TextClock). On line which I mention below No one solves my problem which is present on StackOverflow so please anyone corrects me.
package androidtutorial.project.nightclock.Activities;
import android.app.admin.DevicePolicyManager;
import android.content.Context;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import androidtutorial.project.nightclock.Classes.TextClock;
import androidtutorial.project.nightclock.R;
public class AlwayOnDisplay extends AppCompatActivity {
private TextView dateTimeDisplay;
private SimpleDateFormat dateFormat;
private String date;
private TextClock textClock;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Full flag screen
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_alway_on_display);
textClock=(TextClock)findViewById(R.id.textClock);// error on this line
Calendar calendar=Calendar.getInstance();
dateTimeDisplay=(TextView)findViewById(R.id.date);
dateFormat = new SimpleDateFormat("EEE, MMM d, ''yy");
date = dateFormat.format(calendar.getTime());
dateTimeDisplay.setText(date);
}
#Override
public void onBackPressed() {
super.onBackPressed();
WindowManager wm = (WindowManager) getApplication().getSystemService(Context.WINDOW_SERVICE);
//Lock device
DevicePolicyManager mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
}
}
xml file
<?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="#color/blackColor"
tools:context=".Activities.AlwayOnDisplay">
<TextClock
android:id="#+id/textClock"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/adamina"
android:textStyle="bold"
android:textSize="25sp"
android:gravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/adamina"
android:gravity="center"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#id/textClock"
android:id="#+id/date"
/>
</androidx.constraintlayout.widget.ConstraintLayout>

I have done a change to your xml code. Hopefully it will work
<?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="#color/blackColor"
tools:context=".Activities.AlwayOnDisplay">
<androidtutorial.project.nightclock.Classes.TextClock
android:id="#+id/textClock"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/adamina"
android:gravity="center"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/adamina"
android:gravity="center"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#id/textClock" />
</androidx.constraintlayout.widget.ConstraintLayout>

Problems in Android FirebaseRecyclerView Implementing A Search Users Function

I'm looking to implement a search function. When it runs, logcat is telling me:
E/RecyclerView: No adapter attached; skipping layout.
I have searched SO and the net and the answers tell me that I need to set the adapter and the linear layout manager. As you will see with my code, I set both. Alex Mamo's (#AlexMamo) work on here seems to point me in the right direction but I'm still getting the error.
My Activity
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import com.MyApp.Objects.ParticipantsObject;
import com.MyApp.R;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
public class ParticipantsActivity extends AppCompatActivity {
private EditText mSearchField;
private ImageButton mSearchBtn;
private RecyclerView mResultList;
private DatabaseReference mUserDatabase;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_neighbors);
mUserDatabase = FirebaseDatabase.getInstance().getReference().child("Users").child("Participants");
mSearchField = (EditText) findViewById(R.id.search_field);
mSearchBtn = (ImageButton) findViewById(R.id.search_btn);
mResultList = (RecyclerView) findViewById(R.id.result_list);
mResultList.setHasFixedSize(true);
mResultList.setLayoutManager(new LinearLayoutManager(this));
mSearchBtn.setOnClickListener(view -> {
String searchText = mSearchField.getText().toString();
firebaseUserSearch(searchText);
});
}
private void firebaseUserSearch(String searchText) {
Toast.makeText(ParticipantsActivity.this, "Started Search", Toast.LENGTH_LONG).show();
Query firebaseSearchQuery = mUserDatabase.orderByChild("name").startAt(searchText);
FirebaseRecyclerOptions<ParticipantsObject> firebaseRecyclerOptions = new FirebaseRecyclerOptions.Builder<ParticipantsObject>()
.setQuery(firebaseSearchQuery, ParticipantsObject.class)
.build();
class UserHolder extends RecyclerView.ViewHolder {
private TextView imageThumbTextView, nameTextView
UserHolder(View itemView) {
super(itemView);
imageThumbTextView = itemView.findViewById(R.id.profile_image);
nameTextView = itemView.findViewById(R.id.name_text);
}
void setUsers(ParticipantsObject participantsObject) {
String imageThumb = driverObject.getThumb_image();
imageThumbTextView.setText(imageThumb);
String name = participantsObject.getName();
nameTextView.setText(name);
}
}
FirebaseRecyclerAdapter<ParticipantsObject, UserHolder> firebaseRecyclerAdapter;
firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<ParticipantsObject, UserHolder>(firebaseRecyclerOptions) {
#Override
protected void onBindViewHolder(#NonNull UserHolder userHolder, int position, #NonNull ParticipantsObject participantsObject) {
userHolder.setUsers(participantsObject);
}
#Override
public UserHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_layout, parent, false);
return new UserHolder(view);
}
};
mResultList.setAdapter(firebaseRecyclerAdapter);
firebaseRecyclerAdapter.startListening();
}
}
My Activity XML file
<?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="#ffffff"
tools:context="com.MyApp.ParticipantsActivity">
<TextView
android:id="#+id/heading_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="30dp"
android:layout_marginTop="30dp"
android:text="Firebase Search"
android:textColor="#555555"
android:textSize="24sp" />
<EditText
android:id="#+id/search_field"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignStart="#+id/heading_label"
android:layout_below="#+id/heading_label"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
android:layout_toStartOf="#+id/search_btn"
android:background="#drawable/search_layout"
android:ems="10"
android:hint="Search here"
android:inputType="textPersonName"
android:paddingBottom="10dp"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingTop="10dp"
android:textColor="#999999"
android:textSize="16sp" />
<ImageButton
android:id="#+id/search_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/search_field"
android:layout_alignParentEnd="true"
android:layout_alignTop="#+id/search_field"
android:layout_marginRight="30dp"
android:background="#android:color/background_light"
app:srcCompat="#mipmap/search_button" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/result_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/search_field"
android:layout_marginTop="50dp">
</androidx.recyclerview.widget.RecyclerView>
</RelativeLayout>
My list layout
<?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"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/profile_image"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="30dp"
android:layout_marginTop="20dp"
app:srcCompat="#mipmap/ic_default_user" />
<TextView
android:id="#+id/name_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_marginStart="14dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="50dp"
android:layout_marginEnd="213dp"
android:layout_marginRight="20dp"
android:layout_toEndOf="#+id/profile_image"
android:text="Username"
android:textColor="#555555"
android:textSize="16sp" />
</RelativeLayout>
Any ideas or advice would be much appreciated.

Your code is setting the adapter only after a button is pushed. Because you didn't set it before the first time the RecyclerView needed to render itself on screen, it's going to warn you about that with the message you see in the log. The RecyclerView must have an adapter attached at the time of rendering in order for it to display anything.

It doesn't send the data from Activity to Fragment

I have lots of layouts and activites and fragments. There are tabs in one activity called Hastane1 and it has four tabs in it. They don't have any problem but one of them has. I wanted to send a data from one Activity to a Fragment. They are seperate. Fragment is in Hastane1 activity but Haberlesme1 activity is in another place. It supposed to send the numbers which i entered in the activity called Haberlesme1 to the textView in the fragment called Hastane1Tab3Frag which is a tab of Hastane1.
The Android Studio itself doesn't have any errors but when i run the app on my phone, it stops when i pressed the button called "Gönder" (#id/button8).
Haberlesme1 (Activity):
package com.example.projev021.İllerPackage.KocaeliPackage.GebzePackage.GebzeFragments.Hastane1Fragments;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import com.example.projev021.HaberlesmePackage.Haberlesme1;
import com.example.projev021.R;
public class Hastane1Tab3Frag extends Fragment {
Button goster;
TextView sonucText;
int sayi=0;
Haberlesme1.Ogrenci ogr;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
View v= inflater.inflate(R.layout.hastane1_tab3,container,false);
goster=(Button)v.findViewById(R.id.button13);
sonucText = (TextView)v.findViewById(R.id.textView3);
goster.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
sonucText.setText(sayi);
}
});
return v;
}
public void sendData(int birinciSayi) {
this.sayi=birinciSayi;
}
public void sendOgrenci(Haberlesme1.Ogrenci ogrenci) {
this.ogr=ogrenci;
}
}
haberlesme1.xml:
<?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">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:layout_marginStart="10dp"
android:layout_marginEnd="10dp"
android:fontFamily="#font/lineto_circular_black"
android:text="#string/kackisivar"
android:textSize="50sp"/>
<EditText
android:id="#+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_marginStart="10dp"
android:layout_marginEnd="10dp"
android:ems="10"
android:inputType="number"
android:text="" />
<Button
android:id="#+id/button8"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="50dp"
android:layout_marginEnd="50dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="5dp"
android:background="#drawable/buttonshape"
android:fontFamily="#font/lineto_circular_black"
android:text="#string/gonder"
android:textColor="#FFC107"
android:textSize="30sp"
android:onClick="calistir"/>
</LinearLayout>
Hastane1Tab3Frag (Fragment):
package com.example.projev021.İllerPackage.KocaeliPackage.GebzePackage.GebzeFragments.Hastane1Fragments;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import com.example.projev021.HaberlesmePackage.Haberlesme1;
import com.example.projev021.R;
public class Hastane1Tab3Frag extends Fragment {
Button goster;
TextView sonucText;
int sayi=0;
Haberlesme1.Ogrenci ogr;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
View v= inflater.inflate(R.layout.hastane1_tab3,container,false);
goster=(Button)v.findViewById(R.id.button13);
sonucText = (TextView)v.findViewById(R.id.textView3);
goster.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
sonucText.setText(sayi);
}
});
return v;
}
public void sendData(int birinciSayi) {
this.sayi=birinciSayi;
}
public void sendOgrenci(Haberlesme1.Ogrenci ogrenci) {
this.ogr=ogrenci;
}
}
hastane1tab3.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/container">
<LinearLayout
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:layout_marginStart="10dp"
android:fontFamily="#font/lineto_circular_black"
android:text="#string/kisisayisi_"
android:textSize="50sp" />
<TextView
android:id="#+id/textView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:fontFamily="#font/lineto_circular_black"
android:text=""
android:textSize="100sp"
android:textColor="#000000" />
<Button
android:id="#+id/button13"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="50dp"
android:layout_marginEnd="50dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="5dp"
android:background="#drawable/buttonshape"
android:fontFamily="#font/lineto_circular_black"
android:text="#string/goster"
android:textColor="#FFC107"
android:textSize="30sp"/>
</LinearLayout>
</FrameLayout>
And the screenshots:

How do I get rid of the extra spacing that is appearing at the top of my Android app?

I'm building a homepage for an Android app for one of my college classes. My group is using Android Studio. I've got the layout that I was but I have this random extra space at the top above where it says Welcome.
I cannot figure out how to get rid of that random spacing at the top and it's pushing the rest of my objects down (reports list disappears below nav bar)
Here's my fragment_home.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"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/editText"
android:layout_width="365dp"
android:layout_height="wrap_content"
android:text="#string/home_welcome"
android:textAlignment="center"
android:textSize="20pt"
app:layout_constraintBottom_toTopOf="#+id/text_appts"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/text_appts"
android:layout_width="365dp"
android:layout_height="55dp"
android:ems="10"
android:text="#string/title_appointments"
android:textSize="14pt"
app:layout_constraintBottom_toTopOf="#+id/recycler_appts"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/editText" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_appts"
android:layout_width="360dp"
android:layout_height="125dp"
app:layout_constraintBottom_toTopOf="#+id/text_chats"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.484"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/text_appts"
app:layout_constraintVertical_bias="0.226" />
<EditText
android:id="#+id/text_chats"
android:layout_width="365dp"
android:layout_height="55dp"
android:ems="10"
android:text="#string/title_chats"
android:textSize="14pt"
app:layout_constraintBottom_toTopOf="#+id/recycler_chats"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/recycler_appts" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_chats"
android:layout_width="360dp"
android:layout_height="125dp"
app:layout_constraintBottom_toTopOf="#+id/text_reports"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.484"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/text_chats"
app:layout_constraintVertical_bias="0.226" />
<EditText
android:id="#+id/text_reports"
android:layout_width="365dp"
android:layout_height="55dp"
android:ems="10"
android:text="#string/title_reports"
android:textSize="14pt"
app:layout_constraintBottom_toTopOf="#+id/recycler_reports"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/recycler_chats" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_reports"
android:layout_width="360dp"
android:layout_height="125dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.424"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/text_reports"
app:layout_constraintVertical_bias="0.226" />
</androidx.constraintlayout.widget.ConstraintLayout>
Here's my HomeFragment.java
package com.example.telemedicine.ui.home;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.Nullable;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProviders;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.example.telemedicine.R;
import com.example.telemedicine.ui.utilities.RecyclerItem;
public class HomeFragment extends Fragment {
private HomeViewModel homeViewModel;
private RecyclerView recyclerView_appt, recyclerView_chat, recyclerView_report;
private RecyclerView.Adapter mAdapter_appt, mAdapter_chat, mAdapter_report;
private RecyclerView.LayoutManager layoutManager_appt, layoutManager_chat, layoutManager_report;
private String[] apptData = {"Physical - 9/29 # 10:00am", "Vaccination - 10/4 # 1:30pm", "Check-Up - 10/19 # 9:00am"};
private String[] chatData = {"Dr. Jane Smith", "Dr. Hayden Lee", "Dr. Michael Dean"};
private String[] reportData = {"Blood Work 9/10", "Vaccination Summary 9/1", "Physical 8/23"};
//Activity activity = (Activity)getContext();
public View onCreateView(#NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
homeViewModel =
ViewModelProviders.of(this).get(HomeViewModel.class);
View root = inflater.inflate(R.layout.fragment_home, container, false);
final TextView textView = root.findViewById(R.id.editText);
homeViewModel.getText().observe(this, new Observer<String>() {
#Override
public void onChanged(#Nullable String s) {
textView.setText(s);
}
});
recyclerView_appt = (RecyclerView)root.findViewById(R.id.recycler_appts);
layoutManager_appt = new LinearLayoutManager(this.getActivity());
recyclerView_appt.setLayoutManager(layoutManager_appt);
mAdapter_appt = new RecyclerItem(apptData);
recyclerView_appt.setAdapter(mAdapter_appt);
recyclerView_chat = (RecyclerView)root.findViewById(R.id.recycler_chats);
layoutManager_chat = new LinearLayoutManager(this.getActivity());
recyclerView_chat.setLayoutManager(layoutManager_chat);
mAdapter_chat = new RecyclerItem(chatData);
recyclerView_chat.setAdapter(mAdapter_chat);
recyclerView_report = (RecyclerView)root.findViewById(R.id.recycler_reports);
layoutManager_report = new LinearLayoutManager(this.getActivity());
recyclerView_report.setLayoutManager(layoutManager_report);
mAdapter_report = new RecyclerItem(reportData);
recyclerView_report.setAdapter(mAdapter_report);
return root;
}
}
Here's my HomeViewModel.java
package com.example.telemedicine.ui.home;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;
public class HomeViewModel extends ViewModel {
private MutableLiveData<String> mText;
public HomeViewModel() {
mText = new MutableLiveData<>();
}
public LiveData<String> getText() {
return mText;
}
}
And my 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"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorBackground"
android:paddingTop="?attr/actionBarSize">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/nav_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
android:background="?android:attr/windowBackground"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/bottom_nav_menu" />
<fragment
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="#id/nav_view"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>
I don't know what other files to include but hopefully the problem is in those four files. I've tried so many things to get rid of that spacing, but I cannot figure out how to get rid of it.
Thanks in advance!!

In your activity_main.xml file, try removing the android:paddingTop="?attr/actionBarSize" line in the ConstraintLayout since there is no actionBar.

in your activity_main.xml change 'fragment' (nav_host_fragment) layout_width and layout_height to 0dp. that is the correct form of using constraints.
<fragment
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="0dp"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="#id/nav_view"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/mobile_navigation" />