Java tutorial
/******************************************************************************* * Copyright 2011 The Regents of the University of California * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package org.ohmage.prompt.singlechoicecustom; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.ohmage.R; import org.ohmage.SharedPreferencesHelper; import org.ohmage.Utilities.KVLTriplet; import org.ohmage.activity.SurveyActivity; import org.ohmage.prompt.AbstractPrompt; import org.ohmage.prompt.CustomChoiceListView; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.text.Editable; import android.text.TextWatcher; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.view.ViewGroup.LayoutParams; import android.view.inputmethod.InputMethodManager; import android.widget.AdapterView; import android.widget.CheckedTextView; import android.widget.EditText; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast; import android.widget.AdapterView.OnItemClickListener; import android.widget.SimpleAdapter.ViewBinder; import edu.ucla.cens.systemlog.Log; public class SingleChoiceCustomPrompt extends AbstractPrompt { private static final String TAG = "SingleChoiceCustomPrompt"; private List<KVLTriplet> mChoices; private List<KVLTriplet> mCustomChoices; private int mSelectedIndex; public SingleChoiceCustomPrompt() { super(); mSelectedIndex = -1; mCustomChoices = new ArrayList<KVLTriplet>(); mEnteredText = ""; mIsAddingNewItem = false; } public void setChoices(List<KVLTriplet> choices) { if (choices != null) { mChoices = choices; } else { mChoices = new ArrayList<KVLTriplet>(); } } public List<KVLTriplet> getChoices() { return mChoices; } /** * Returns true if the selected index falls within the range of possible * indices within either the preset list of items or the new list of items. */ @Override public boolean isPromptAnswered() { return ((mSelectedIndex >= 0 && mSelectedIndex < mChoices.size()) || (mSelectedIndex >= 0 && mSelectedIndex < mChoices.size() + mCustomChoices.size())); } @Override protected Object getTypeSpecificResponseObject() { if (mSelectedIndex >= 0 && mSelectedIndex < mChoices.size()) { return Integer.decode(mChoices.get(mSelectedIndex).key); } else if (mSelectedIndex >= 0 && mSelectedIndex < mChoices.size() + mCustomChoices.size()) { return Integer.decode(mCustomChoices.get(mSelectedIndex - mChoices.size()).key); } else { return null; } } /** * The text to be displayed to the user if the prompt is considered * unanswered. */ @Override public String getUnansweredPromptText() { return ("Please select an item or add your own."); } @Override protected void clearTypeSpecificResponseData() { mSelectedIndex = -1; } @Override protected Object getTypeSpecificExtrasObject() { JSONArray jsonArray = new JSONArray(); for (KVLTriplet choice : mChoices) { JSONObject jsonChoice = new JSONObject(); try { jsonChoice.put("choice_id", Integer.decode(choice.key)); jsonChoice.put("choice_value", choice.label); } catch (NumberFormatException e) { Log.e(TAG, "NumberFormatException when trying to parse custom choice key", e); return null; } catch (JSONException e) { Log.e(TAG, "JSONException when trying to generate custom_choices json", e); return null; } jsonArray.put(jsonChoice); } for (KVLTriplet choice : mCustomChoices) { JSONObject jsonChoice = new JSONObject(); try { jsonChoice.put("choice_id", Integer.decode(choice.key)); jsonChoice.put("choice_value", choice.label); } catch (NumberFormatException e) { Log.e(TAG, "NumberFormatException when trying to parse custom choice key", e); return null; } catch (JSONException e) { Log.e(TAG, "JSONException when trying to generate custom_choices json", e); return null; } jsonArray.put(jsonChoice); } return jsonArray; } private View mFooterView; private CustomChoiceListView mListView; private boolean mIsAddingNewItem; private String mEnteredText; private int mLastIndex; private int mLastTop; @Override public View getView(final Context context) { mCustomChoices.clear(); SingleChoiceCustomDbAdapter dbAdapter = new SingleChoiceCustomDbAdapter(context); String surveyId = ((SurveyActivity) context).getSurveyId(); SharedPreferencesHelper prefs = new SharedPreferencesHelper(context); String campaignUrn = ((SurveyActivity) context).getCampaignUrn(); String username = prefs.getUsername(); if (dbAdapter.open()) { Cursor c = dbAdapter.getCustomChoices(username, campaignUrn, surveyId, SingleChoiceCustomPrompt.this.getId()); c.moveToFirst(); for (int i = 0; i < c.getCount(); i++) { //c.getLong(c.getColumnIndex(SingleChoiceCustomDbAdapter.KEY_ID)); int key = c.getInt(c.getColumnIndex(SingleChoiceCustomDbAdapter.KEY_CHOICE_ID)); String label = c.getString(c.getColumnIndex(SingleChoiceCustomDbAdapter.KEY_CHOICE_VALUE)); mCustomChoices.add(new KVLTriplet(String.valueOf(key), null, label)); c.moveToNext(); } c.close(); dbAdapter.close(); } LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); // mListView = (ListView) inflater.inflate(R.layout.prompt_single_choice_custom, null); mListView = new CustomChoiceListView(context); mListView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); mListView.setTextFilterEnabled(false); mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); mListView.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS); mFooterView = inflater.inflate(R.layout.custom_choice_footer, null); EditText mEditText = (EditText) mFooterView.findViewById(R.id.new_choice_edit); ImageButton mButton = (ImageButton) mFooterView.findViewById(R.id.ok_button); ImageButton mCancelButton = (ImageButton) mFooterView.findViewById(R.id.cancel_button); showAddItemControls(context, mIsAddingNewItem); mButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (mEnteredText != null && !mEnteredText.equals("")) { SingleChoiceCustomDbAdapter dbAdapter = new SingleChoiceCustomDbAdapter(context); String surveyId = ((SurveyActivity) context).getSurveyId(); SharedPreferencesHelper prefs = new SharedPreferencesHelper(context); String campaignUrn = ((SurveyActivity) context).getCampaignUrn(); String username = prefs.getUsername(); int choiceId = 100; ArrayList<String> keys = new ArrayList<String>(); for (KVLTriplet choice : mChoices) { keys.add(choice.key.trim()); } for (KVLTriplet choice : mCustomChoices) { keys.add(choice.key.trim()); } while (keys.contains(String.valueOf(choiceId))) { choiceId++; } if (dbAdapter.open()) { dbAdapter.addCustomChoice(choiceId, mEnteredText, username, campaignUrn, surveyId, SingleChoiceCustomPrompt.this.getId()); dbAdapter.close(); } showAddItemControls(context, false); mSelectedIndex = mListView.getCount() - 1; ((SurveyActivity) context).reloadCurrentPrompt(); } else { Toast.makeText(context, "Please enter some text", Toast.LENGTH_SHORT).show(); } } }); mCancelButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // EditText edit = (EditText) mFooterView.findViewById(R.id.new_choice_edit); showAddItemControls(context, false); } }); mEditText.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { // TODO Auto-generated method stub } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable s) { // TODO Auto-generated method stub mEnteredText = s.toString(); // mListView.setSelectionFromTop(mLastIndex, mLastTop); // EditText editText = (EditText) mFooterView.findViewById(R.id.new_choice_edit); // editText.requestFocus(); } }); mListView.addFooterView(mFooterView); String[] from = new String[] { "value" }; int[] to = new int[] { android.R.id.text1 }; List<HashMap<String, String>> data = new ArrayList<HashMap<String, String>>(); for (int i = 0; i < mChoices.size(); i++) { HashMap<String, String> map = new HashMap<String, String>(); map.put("key", mChoices.get(i).key); map.put("value", mChoices.get(i).label); data.add(map); } for (int i = 0; i < mCustomChoices.size(); i++) { HashMap<String, String> map = new HashMap<String, String>(); map.put("key", mCustomChoices.get(i).key); map.put("value", mCustomChoices.get(i).label); data.add(map); } SimpleAdapter adapter = new SimpleAdapter(context, data, R.layout.single_choice_list_item, from, to); adapter.setViewBinder(new ViewBinder() { @Override public boolean setViewValue(View view, Object data, String textRepresentation) { ((CheckedTextView) view).setText((String) data); return true; } }); mListView.setAdapter(adapter); if (mSelectedIndex >= 0 && mSelectedIndex < mChoices.size() + mCustomChoices.size()) { mListView.setItemChecked(mSelectedIndex, true); } mListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (position == mListView.getCount() - 1) { showAddItemControls(context, true); mSelectedIndex = -1; mLastIndex = mListView.getLastVisiblePosition(); View v = mListView.getChildAt(mLastIndex); mLastTop = (v == null) ? 0 : v.getTop(); mListView.setSelectionFromTop(mLastIndex, mLastTop); } else { //Map<String, String> map = (HashMap<String, String>) parent.getItemAtPosition(position); //mSelectedKey = map.get("key"); mSelectedIndex = position; //((SurveyActivity)context).setResponse(index, id, value) } } }); mListView.setSelectionFromTop(mLastIndex, mLastTop); return mListView; } private void showAddItemControls(Context context, boolean show) { ImageView imageView = (ImageView) mFooterView.findViewById(R.id.image); TextView textView = (TextView) mFooterView.findViewById(R.id.text); EditText editText = (EditText) mFooterView.findViewById(R.id.new_choice_edit); ImageButton mButton = (ImageButton) mFooterView.findViewById(R.id.ok_button); ImageButton mCancelButton = (ImageButton) mFooterView.findViewById(R.id.cancel_button); //editText.setText(""); InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); if (show) { editText.setText(mEnteredText); mIsAddingNewItem = true; imageView.setVisibility(View.GONE); textView.setVisibility(View.GONE); editText.setVisibility(View.VISIBLE); mButton.setVisibility(View.VISIBLE); mCancelButton.setVisibility(View.VISIBLE); editText.requestFocus(); imm.showSoftInput(editText, 0); } else { mEnteredText = ""; mIsAddingNewItem = false; imageView.setVisibility(View.VISIBLE); textView.setVisibility(View.VISIBLE); editText.setVisibility(View.GONE); mButton.setVisibility(View.GONE); mCancelButton.setVisibility(View.GONE); imm.hideSoftInputFromWindow(editText.getWindowToken(), 0); } } @Override public void handleActivityResult(Context context, int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub } }