Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android Android Activity Lifecycle Introducing SharedPreferences Saving and Retrieving Data with SharedPreferences

Unable to get this question

Do I have to use if-else to identify the true and false cases ?

import android.view.View;
import android.os.Bundle;

public class MainActivity extends Activity {

  public CheckBox mCheckBox;
  private static final String PREFS_FILE = "PREFS_FILE.preferences";
  private static final String KEY_CHECKBOX = "KEY_CHECKBOX";
  private SharedPreferences mSharedPreferences;
  private SharedPreferences.Editor mEditor;

  protected void onCreate(Bundle savedInstanceState) {

    mCheckBox = (CheckBox) findViewById(R.id.checkBox);
    mSharedPreferences = getSharedPreferences(PREFS_FILE,Context.MODE_PRIVATE);
    mEditor = mSharedPreferences.edit();

       Boolean checkBoxBoolean = mSharedPreferences.getBoolean(KEY_CHECKBOX,"");


  protected void onPause() 


1 Answer

Seth Kroger
Seth Kroger
56,412 Points

The main problem is you have the default value for getBoolean as an empty string but a boolean can only be true or false, so the default is the wrong type.

Also you should put the code for getting the saved preferences in onResume(), not onCreate().

Thanks having "false" instead of empty braces helped. Actually I did try the same before and was getting recompile error in the preview Tab. Thanks for guidance though.