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

Posted by REINHARD CHEFU
REINHARD CHEFU
5,163 Points

activity lifecycle

Lastly, retrieve the saved value in onCreate and set the state of the CheckBox. If there isn't a saved value, the CheckBox should NOT be checked. Hint: Use the setChecked method.

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

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

  private SharedPreferences.Editor mEditor;
  private SharedPreferences mSharedPreferences;


  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);
      mEditor.apply();


    }

}