Code for creating a simple Android counter app

CounterApp.java

//Xml code for creating the count TextView
<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:textSize="120sp"
    android:id="@+id/count"
    android:text="0" />

//Java code for increasing the count and displaying it
int count = 0;

//Note: in this video, https://www.youtube.com/watch?v=DeutHs8Bz5w, 
//I initialize countText in the displayCount method, 
//but it's actually better to do it outside the method
TextView countText = (TextView) findViewById(R.id.count);

public void displayCount(int count) {
    countText.setText(String.valueOf(count));
}

public void increaseCount (View view) {
    count +=1;
    displayCount(count);
}

//Java code to put inside the Floating Action Button's onClick method
//This will increase the count everytime the button is tapped
increaseCount(view);