Android Lab: Shared References - Write a MainActivity program

gistfile1.java

package com.example.androidlab;

import android.os.Bundle;
import android.app.Activity;
import android.content.SharedPreferences;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
  public static final String PREFS_NAME = "AndroidPrefs";
	SharedPreferences settings;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		final EditText txtName = (EditText) findViewById(R.id.editTextName);
		settings = getSharedPreferences(PREFS_NAME, 0);

		View.OnClickListener handler = new View.OnClickListener() {
			public void onClick(View v) {
				switch (v.getId()) {
				case R.id.buttonSave:
					String strName = txtName.getText().toString();
					txtName.setText("");

					SharedPreferences.Editor editor = settings.edit();
					editor.putString("name", strName);
					editor.commit();

					Toast.makeText(MainActivity.this,"You entered: " + strName, Toast.LENGTH_SHORT).show();
					break;

				case R.id.buttonShow:
					String name = settings.getString("name", null);
					Toast.makeText(MainActivity.this, "Saved Name is: " + name,Toast.LENGTH_LONG).show();
					break;
				}
			}
		};
		findViewById(R.id.buttonSave).setOnClickListener(handler);
		findViewById(R.id.buttonShow).setOnClickListener(handler);
	}
}