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

Posted by Susan Jensen
Susan Jensen
15,190 Points

Android Activity Lifecycle -checkbox? putBoolean? isChecked? isOverWhelmed(this.me)

Android Activity Lifecycle - Challenge Task 3 of 4

Override the onPause method. Then save the value of the CheckBox. Hint: Use isChecked() to get the value of the CheckBox, and use 'putBoolean' to store the value.

https://teamtreehouse.com/library/android-activity-lifecycle/introducing-sharedpreferences/saving-and-retrieving-data-with-sharedpreferences-2

I passed tasks 1 & 2, and was able to add the override, but I have tried about 8 different things to add and save a checkbox... and am so tangled up in it now that I got a bad headace. I left a comment at the code that isn't passing.

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

public class MainActivity extends Activity {

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


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

    mCheckBox = (CheckBox) findViewById(R.id.checkBox);
     mSharedPreferences = getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE);
        mEditor = mSharedPreferences.edit();
  }
  @Override
    protected void onPause() {
        super.onPause();
//I am lost around here
boolean checked = mCheckBox.isChecked();
  mEditor.putBoolean("key_checkbox",true);


    }
}

2 Answers

Jacob Bergdahl
Jacob Bergdahl
29,118 Points
Jacob Bergdahl
Jacob Bergdahl
29,118 Points

In mEditor.putBoolean("key_checkbox",true); you add true instead of the value checked. Try switching it to checked and see if it helps!

Susan Jensen
Susan Jensen
15,190 Points

Thanks, that worked.

Ben Deitch
STAFF
Ben Deitch
Treehouse Teacher
Ben Deitch
Ben Deitch
Treehouse Teacher

Also don't forget to call apply on the editor object to save your changes.

mEditor.apply();
Susan Jensen
Susan Jensen
15,190 Points

Thank you too. I actually had this in my answer at some point, but took it back out.