java for android

gistfile1.txt

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

        final Spinner s = (Spinner) findViewById(spinner);


        s.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                if (s.getSelectedItem().toString().equals("Mark Twain"))

                    Toast.makeText(MainActivity.this, ("Books by Mark Twain include: The prince and the pauper, " +
                            "The adventures of Tom Sawyer and the adventures of Huckleberry Finn.").toString(), Toast.LENGTH_LONG).show();



                      else  if (s.getSelectedItem().toString().equals("Toni Morrison"))
                        Toast.makeText(MainActivity.this, "Books by Toni Morrison include: Beloved, The bluest eye and Song of Solomon. ".toString(), Toast.LENGTH_LONG).show();



                   else if (s.getSelectedItem().toString().equals("Ernest Hemingway"))
                        Toast.makeText(MainActivity.this, "Books by Ernest Hemingway include: From whom the bell tolls, The old man and the sea and The sun also rises.".toString(), Toast.LENGTH_LONG).show();


                  else  if (s.getSelectedItem().toString().equals("John Steinbeck"))
                        Toast.makeText(MainActivity.this, "Books by John Steinbeck include: East of Eden, Of mice and men and The grapes of wrath.".toString(), Toast.LENGTH_LONG).show();



                else
                {
                    Toast.makeText(MainActivity.this, "Selected an item".toString(), Toast.LENGTH_LONG).show();
                }

            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
    }
}