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

Posted by dlpuxdzztg
dlpuxdzztg
8,243 Points

Stuck on challenge 4/4

Hello

I'm having trouble passing this challenge, i'm doing what it tells me to do but it still tells me that the CheckBox object needs to return 'false':

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

public class MainActivity extends Activity {
  private static final String PREFS_FILE = "com.sharedpreferencesapp.preferences";
  private static final String KEY_CHECKBOX = "KEY_CHECKBOX";
  public CheckBox mCheckBox;

  private SharedPreferences mSharedPreferences;
  private SharedPreferences.Editor mEditor;

  @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();

    if (mSharedPreferences.getBoolean(KEY_CHECKBOX, true)) {
      mCheckBox.setChecked(true);
    } else if (mSharedPreferences.getBoolean(KEY_CHECKBOX, false)) {
      mCheckBox.setChecked(false);
    }
  }

  @Override
  protected void onPause() {
    super.onPause();

    mEditor.putBoolean(KEY_CHECKBOX, mCheckBox.isChecked());
    mEditor.apply();
  }
}

Please help!

1 Answer

Judah Devasahayam
.a{fill-rule:evenodd;}techdegree seal-36
Judah Devasahayam
Full Stack JavaScript Techdegree Graduate 22,610 Points

Why are you using else if? just use if else and your code should look like this

 if (mSharedPreferences.getBoolean(KEY_CHECKBOX, false)) {
      mCheckBox.setChecked(true);
    } else {
      mCheckBox.setChecked(false);
    }

or just use 

mCheckBox.setChecked(mSharedPreferences.getBoolean(KEY_CHECKBOX, false));
Ryan Lentz
Ryan Lentz
9,191 Points

The first solution works. The second recommendation won't work because the value of mCheckBox should remain true if it was already true.