SharedPreferenceReadWriteActivity.java

package course.examples.DataManagement.SharedPreferences;

import java.util.Random;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class SharedPreferenceReadWriteActivity extends Activity {
	private static String HIGH_SCORE = "high_score";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		final SharedPreferences prefs = getPreferences(MODE_PRIVATE);
		
		setContentView(R.layout.main);

		// High Score
		final TextView highScore = (TextView) findViewById(R.id.high_score_text);
		highScore.setText(String.valueOf(prefs.getInt(HIGH_SCORE, 0)));
		
		//Game Score
		final TextView gameScore = (TextView) findViewById(R.id.game_score_text);
		gameScore.setText(String.valueOf("0"));

		// Play Button 
		final Button playButton = (Button) findViewById(R.id.play_button);
		playButton.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				
				Random r = new Random();
				int val = r.nextInt(1000);
				gameScore.setText(String.valueOf(val));
				
				// Get Stored High Score
				if (val > prefs.getInt(HIGH_SCORE, 0)) {
					
					// Get and edit high score
					SharedPreferences.Editor editor = prefs.edit();
					editor.putInt(HIGH_SCORE, val);
					editor.commit();

					highScore.setText(String.valueOf(val));

				}
			}
		});
		
		// Reset Button
		final Button resetButton = (Button) findViewById(R.id.reset_button);
		resetButton.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
	
				// Set high score to 0
				SharedPreferences.Editor editor = prefs.edit();
					editor.putInt(HIGH_SCORE, 0);
					editor.commit();
					
					highScore.setText(String.valueOf("0"));
					gameScore.setText(String.valueOf("0"));
			
				}
		});
		
	}
}