Android Open Source - Android-Wizard-Framework Sesame Street

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License

The source code is released under:
MIT License
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Java Source Code

package com.hps.wizard.sample.states;
/* w w  w .  j a v a 2 s  . c  om*/
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

import com.hps.wizard.StateFragment;
import com.hps.wizard.AbstractWizardActivity;
import com.hps.wizard.sample.R;

/**
 * A state offering a single multiple choice question. The answer supplied and whether it is right or wrong is stored in {@link SharedPreferences} when the user
 * moves forward and cleared if they go back.
 */
public class SesameStreet extends StateFragment {

  private static final String CHECKED_BUTTON_ID = "checkedId";
  private static final String TAG = "SesameStreet";
  private RadioGroup choiceGroup;

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View v = inflater.inflate(R.layout.fragment_state_sesame_street, container, false);

    choiceGroup = (RadioGroup) v.findViewById(R.id.choiceGroup);

    /**
     * Set up a listener to enable or disable the next button.
     */
    OnCheckedChangeListener thingListener = new OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(RadioGroup group, int checkedId) {
        if (getWizardActivity() != null) {
          getWizardActivity().enableButton(AbstractWizardActivity.NEXT_BUTTON,
              choiceGroup.getCheckedRadioButtonId() != -1, SesameStreet.this);
        }
      }
    };
    choiceGroup.setOnCheckedChangeListener(thingListener);

    /**
     * Check the correct radio button if we're rebuilding the screen after orientation change.
     */
    if (getArguments() != null) {
      int checkedId = getArguments().getInt(CHECKED_BUTTON_ID, -1);
      if (checkedId != -1) {
        choiceGroup.check(checkedId);
      }
    }

    return v;
  }

  @Override
  public String getTitle() {
    return "Brought to You by the Letter S";
  }

  @Override
  public boolean canGoForward() {
    /**
     * We can go forward only if the user has selected an answer.
     */
    return choiceGroup != null && choiceGroup.getCheckedRadioButtonId() != -1;
  }

  @Override
  public StateDefinition getNextState() {
    /**
     * The next state is always the results.
     */
    StateDefinition def = new StateDefinition(Results.class, null);
    return def;
  }

  @Override
  public void onAdded() {
    Log.i(TAG, "onAdded, getArguments = " + getArguments());
    super.onAdded();

    /**
     * Always disable the next button when we first start.
     */
    getWizardActivity().enableButton(AbstractWizardActivity.NEXT_BUTTON, false, SesameStreet.this);
  }

  @Override
  public Bundle getSavedInstanceState() {
    Bundle bundle = new Bundle();
    /**
     * Store off which radio button was checked (if any).
     */
    if (choiceGroup != null) {
      bundle.putInt(CHECKED_BUTTON_ID, choiceGroup.getCheckedRadioButtonId());
    }
    return bundle;
  }

  @Override
  public void onForward() {
    super.onForward();

    /**
     * When the user moves forward, store their answer.
     */
    int id = choiceGroup.getCheckedRadioButtonId();
    RadioButton btn = (RadioButton) choiceGroup.findViewById(id);
    String label = btn.getText().toString();
    SharedPreferences prefs = getWizardActivity().getSharedPreferences("answers", Context.MODE_PRIVATE);
    prefs.edit().putString("sesame_answer", label).putBoolean("sesame_correct", label.equals("Mr. Hooper")).commit();
  }

  @Override
  public void onBack() {
    super.onBack();

    /**
     * When the user moves back, clear any stored answer.
     */
    SharedPreferences prefs = getWizardActivity().getSharedPreferences("answers", Context.MODE_PRIVATE);
    prefs.edit().remove("sesame_answer").remove("sesame_correct").commit();
  }

}
Java Source Code List
