TextView and EditText view is not getting displayed

Here are the problems that I have :

1. My TextViews are not getting displayed

2. My EditText Views margins are also not getting displayed

3. As the user inputs userName and Password into EditText Field, the cursor keeps moving ahead but no letters are displayed on the screen

   This is what I expect from my code
   

   

   This is what I get as output
   

Here is my XML file

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#3dcc24">

<include

layout="@layout/log_toolbar" />

<Button
    android:id="@+id/button6"
    android:layout_width="150dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="20dp"
    android:layout_marginRight="20dp"
    android:background="#089da2"
    android:text="Register Later"
    android:textAlignment="center"
    android:textSize="18sp"
    android:layout_alignBaseline="@+id/RegisterButton"
    android:layout_alignBottom="@+id/RegisterButton"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true" />

<Button
    android:id="@+id/RegisterButton"
    android:layout_width="150dp"
    android:layout_height="wrap_content"
    android:layout_marginLeft="30dp"
    android:layout_marginStart="30dp"
    android:background="#089da2"
    android:text="Register Now"
    android:textAlignment="center"
    android:textSize="18sp"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_marginBottom="16dp" />

<TextView
    android:id="@+id/textView7"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/button6"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="25dp"
    android:fontFamily="serif"
    android:text="Not Registered?"
    android:textAlignment="center"
    android:textSize="24sp"
    android:textStyle="italic" />

<RelativeLayout
    android:layout_width="250dp"
    android:layout_height="300dp"
    android:background="#FFFFFF"
    android:id="@+id/relativeLayout2"
    android:layout_marginBottom="44dp"
    android:layout_above="@+id/textView7"
    android:layout_centerHorizontal="true">

<EditText
        android:id="@+id/editText4"
        style="@android:style/Widget.DeviceDefault.EditText"

        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/textView3"
        android:layout_marginTop="13dp"
        android:ems="10"
        android:inputType="textEmailAddress"
        android:textColor="@color/colorPrimary" />

<EditText
        android:id="@+id/editText5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="146dp"
        android:ems="10"
        android:inputType="textPassword" />

<TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="13dp"
        android:fontFamily="serif"
        android:text="@string/username"
        android:textAlignment="center"
        android:textColor="@color/colorPrimary"
        android:textSize="18sp"
        android:textStyle="bold" />

<TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_alignLeft="@+id/textView3"
        android:layout_alignStart="@+id/textView3"
        android:layout_below="@+id/editText4"
        android:layout_marginTop="11dp"
        android:text="@string/password"
        android:textColor="@color/colorPrimary"
        android:fontFamily="serif"
        android:textSize="18sp"
        android:textStyle="bold" />

<Button
        android:id="@+id/LogButton"
        android:layout_width="130dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="25dp"
        android:backgroundTint="#535de2"
        android:lineSpacingExtra="10sp"
        android:text="LOG IN"
        android:textAlignment="center"
        android:textSize="18sp"
        android:textStyle="bold"
        android:layout_below="@+id/editText5"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

<Button
    android:id="@+id/button2"
    android:layout_width="90dp"
    android:layout_height="35dp"
    android:background="#FFFFFF"
    android:fontFamily="serif"
    android:text="@string/forgot"
    android:layout_alignBottom="@+id/relativeLayout2"
    android:layout_alignLeft="@+id/button6"
    android:layout_alignStart="@+id/button6"
    android:layout_alignRight="@+id/relativeLayout2"
    android:layout_alignEnd="@+id/relativeLayout2" />

</RelativeLayout>

Here is my Java file

public class First extends AppCompatActivity {


int Flag = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.first);
    Toolbar t = (Toolbar) findViewById(R.id.toolbarL) ;
    setSupportActionBar(t);
    getSupportActionBar().setDisplayShowTitleEnabled(false);
    Button RegButton = (Button) findViewById(R.id.RegisterButton);
    Button  logButton = (Button) findViewById(R.id.LogButton);
    EditText UserName = (EditText) findViewById(R.id.editText4);
    EditText Password = (EditText) findViewById(R.id.editText5);

    RegButton.setOnClickListener(new OnClickListener(){
        public void onClick(View view) {
            Intent i2 = new Intent(getApplicationContext(), LogInForm.class);

            startActivity(i2);
        }
    });

    logButton.setOnClickListener(new OnClickListener(){
        public void onClick(View view) {


        }
    });

}


}

Any help appreciated!