1. ΣΤΟ LAYOUT1
 
     <Button
        android:text="GO TO 1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_marginStart="34dp"
        android:layout_marginTop="91dp"
        android:id="@+id/button1" />


2. ΔΗΛΩΣΗ ΜΕΤΑΒΛΗΤΩΝ SO MAINACTIVITY
		
    Button btn;


	
		
3. ΣΥΝΔΕΣΗ BUTTON ME LAYOUT

       btn = (Button)findViewById(R.id.button1);
		

4. ENTOLH TOY KOYMPIOY
		
		
       btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                startActivity(intent);

            }
        });


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		GIA TO DEYTERO PARAUYRO
		

5. In the Project window, right-click the app folder and select New > Activity > Empty Activity




6. STO LAYOUT2

    <Button
        android:text="GO TO 1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_marginStart="28dp"
        android:layout_marginTop="66dp"
        android:id="@+id/button2" />
		
		
		
		
7. ΔΗΛΩΣΗ ΜΕΤΑΒΛΗΤΩΝ SO MAIN2ACTIVITY
		
    Button btn2;


	
		
8. ΣΥΝΔΕΣΗ BUTTON ME LAYOUT2

        btn2 = (Button)findViewById(R.id.button2);
		

9. ENTOLH TOY KOYMPIOY2
		
		
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent = new Intent(Main2Activity.this, MainActivity.class);
                startActivity(intent);

            }
        });