public class MainActivity extends AppCompatActivity{
    ImageView clickAuthor;
    TextView history;
    Button hidehistory;

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

        clickAuthor =(ImageView)findViewById(R.id.imageViewInventor);
        history = (TextView) findViewById(R.id.textViewHistory);
        hidehistory = (Button) findViewById(R.id.buttonHideHistory);

        clickAuthor.setOnClickListener(new ImageView.OnClickListener(){
        public void onClick(View v){
                    history.setVisibility(View.VISIBLE);
                    hidehistory.setVisibility(View.VISIBLE);
                    lowertextfield.setVisibility(View.INVISIBLE);
            }});
        }
}