package com.teigrevena.optikos.if_for;


import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity {

    Button btn1;
    Button btn2;
    Button btn3;

    TextView mytextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn1 = (Button)findViewById(R.id.button1);
        btn2 = (Button)findViewById(R.id.button2);
        btn3 = (Button)findViewById(R.id.button3);
        mytextView= (TextView)findViewById(R.id.textView4);

        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                if (mytextView.isShown()){

                    mytextView.setVisibility(View.GONE);

                }
                else {
                    mytextView.setVisibility(View.VISIBLE);
                }

            }
        });


        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

        btn2.setVisibility(View.VISIBLE);
        btn1.setVisibility(View.GONE);

            }
        });

        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                btn1.setVisibility(View.VISIBLE);
                btn2.setVisibility(View.GONE);

            }
        });


    }
}