Variables In PreferenceActivity

Question

In my android application i want to make a feedback dialog that will show the second time the application is started. How can i do this ? Can i do it by variables in a PreferenceActivity. If the a variable in the preference activity is edit by feks ++; will this be the result of the variable next time the app is started ?

Edit: I dont get any of the suggested answers to work, can i create a text file on the ext or internal store the first time the app is started and check if the file exists ?

Answer 1

Use SharedPreferences:

public class MainActivity extends Activity {
  private SharedPreferences mSharedPrefs;
  private static final String PREF_LAUNCH_COUNTER = "launch_counter";
  private int mLaunchCount = 0;
  @Override
  public void onCreate(Bundle savedState) {
    mSharedPrefs = getPreferences(Context.MODE_PRIVATE);
    if (savedState != null) {
      mLaunchCount = savedState.getInt(PREF_LAUNCH_COUNTER, 1);
    } else {
      mLaunchCount = mSharedPrefs.getInt(PREF_LAUNCH_COUNTER, 1);
      if(mLaunchCount > 1) {
        //code to handle when the app was launched after the first time.
      } else {
        //code for when the app was launched for the first time..
      }
      mSharedPrefs.edit().putInt(PREF_LAUNCH_COUNTER, mLaunchCount++);

    }

  }
  @Override
  protected void onSaveInstanceState(Bundle outState) {
     outState.putInt(PREF_LAUNCH_COUNTER, mLaunchCount);
  }

}