Java tutorial
/* * Copyright (C) 2009 University of Washington * * 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.odk.collect.android.widgets; import org.javarosa.core.model.SelectChoice; import org.javarosa.core.model.data.IAnswerData; import org.javarosa.core.model.data.SelectMultiData; import org.javarosa.core.model.data.helper.Selection; import org.javarosa.form.api.FormEntryCaption; import org.javarosa.form.api.FormEntryPrompt; import org.javarosa.xpath.expr.XPathFuncExpr; import org.odk.collect.android.application.Collect; import org.odk.collect.android.external.ExternalDataUtil; import org.odk.collect.android.external.ExternalSelectChoice; import org.odk.collect.android.views.MediaLayout; import android.annotation.SuppressLint; import android.app.Activity; import android.content.Context; import android.graphics.Color; import android.graphics.Point; import android.util.TypedValue; import android.view.inputmethod.InputMethodManager; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.GridLayout; import android.widget.GridLayout.Spec; import android.widget.ImageView; import android.widget.LinearLayout; import android.graphics.Point; import android.graphics.drawable.GradientDrawable.Orientation; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.Display; import android.view.Gravity; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.GridLayout; import android.widget.GridLayout.Spec; import android.widget.TextView; import java.util.ArrayList; import java.util.Vector; /** * SelctMultiWidget handles multiple selection fields using checkboxes. * * @author Carl Hartung (carlhartung@gmail.com) * @author Yaw Anokwa (yanokwa@gmail.com) */ @SuppressLint("NewApi") public class SelectMultiWidgetGridLayout extends QuestionWidget { private boolean mCheckboxInit = true; Vector<SelectChoice> mItems; private ArrayList<CheckBox> mCheckboxes; private GridLayout glayout; @SuppressWarnings("unchecked") public SelectMultiWidgetGridLayout(Context context, FormEntryPrompt prompt) { super(context, prompt); mPrompt = prompt; mCheckboxes = new ArrayList<CheckBox>(); // SurveyCTO-added support for dynamic select content (from .csv files) XPathFuncExpr xPathFuncExpr = ExternalDataUtil.getSearchXPathExpression(prompt.getAppearanceHint()); if (xPathFuncExpr != null) { mItems = ExternalDataUtil.populateExternalChoices(prompt, xPathFuncExpr); } else { mItems = prompt.getSelectChoices(); } setOrientation(LinearLayout.VERTICAL); Vector<Selection> ve = new Vector<Selection>(); if (prompt.getAnswerValue() != null) { ve = (Vector<Selection>) prompt.getAnswerValue().getValue(); } WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); Display display = wm.getDefaultDisplay(); Point size = new Point(); display.getSize(size); int screenWidth = size.x; int height = size.y; int halfScreenWidth = (int) (screenWidth * 0.5); int quarterScreenWidth = (int) (halfScreenWidth * 0.5); glayout = new GridLayout(getContext()); glayout.setOrientation(0); glayout.setColumnCount(2); //glayout.setRowCount(2); int row_index = 0; int col_index = 0; if (mItems != null) { for (int i = 0; i < mItems.size(); i++) { // no checkbox group so id by answer + offset CheckBox c = new CheckBox(getContext()); c.setTag(Integer.valueOf(i)); c.setId(QuestionWidget.newUniqueId()); c.setText(prompt.getSelectChoiceText(mItems.get(i))); c.setTextSize(TypedValue.COMPLEX_UNIT_DIP, mAnswerFontsize); c.setFocusable(!prompt.isReadOnly()); c.setEnabled(!prompt.isReadOnly()); for (int vi = 0; vi < ve.size(); vi++) { // match based on value, not key if (mItems.get(i).getValue().equals(ve.elementAt(vi).getValue())) { c.setChecked(true); break; } } mCheckboxes.add(c); // when clicked, check for readonly before toggling c.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (!mCheckboxInit && mPrompt.isReadOnly()) { if (buttonView.isChecked()) { buttonView.setChecked(false); Collect.getInstance().getActivityLogger().logInstanceAction(this, "onItemClick.deselect", mItems.get((Integer) buttonView.getTag()).getValue(), mPrompt.getIndex()); } else { buttonView.setChecked(true); Collect.getInstance().getActivityLogger().logInstanceAction(this, "onItemClick.select", mItems.get((Integer) buttonView.getTag()).getValue(), mPrompt.getIndex()); } } } }); String audioURI = null; audioURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), FormEntryCaption.TEXT_FORM_AUDIO); String imageURI; if (mItems.get(i) instanceof ExternalSelectChoice) { imageURI = ((ExternalSelectChoice) mItems.get(i)).getImage(); } else { imageURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), FormEntryCaption.TEXT_FORM_IMAGE); } String videoURI = null; videoURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), "video"); String bigImageURI = null; bigImageURI = prompt.getSpecialFormSelectChoiceText(mItems.get(i), "big-image"); MediaLayout mediaLayout = new MediaLayout(getContext()); mediaLayout.setAVT(prompt.getIndex(), "." + Integer.toString(i), c, audioURI, imageURI, videoURI, bigImageURI); // mediaLayout.setAVT(index, selectionDesignator, text, audioURI, imageURI, videoURI, bigImageURI); // addView(mediaLayout); row_index = i / 2 + 1; col_index = i % 2; int orientation = display.getOrientation(); if (orientation == 1) { halfScreenWidth = height / 2; } else { halfScreenWidth = screenWidth / 2; } Spec row = GridLayout.spec(row_index); Spec col = GridLayout.spec(col_index); GridLayout.LayoutParams first = new GridLayout.LayoutParams(row, col); first.width = halfScreenWidth; // first.height = quarterScreenWidth * 2; glayout.addView(mediaLayout, first); // Last, add the dividing line between elements (except for the last element) ImageView divider = new ImageView(getContext()); divider.setBackgroundResource(android.R.drawable.divider_horizontal_bright); if (i != mItems.size() - 1) { if (col_index == 0) glayout.addView(divider); } } } addView(glayout); mCheckboxInit = false; } @Override public void clearAnswer() { for (CheckBox c : mCheckboxes) { if (c.isChecked()) { c.setChecked(false); } } } @Override public IAnswerData getAnswer() { Vector<Selection> vc = new Vector<Selection>(); for (int i = 0; i < mCheckboxes.size(); ++i) { CheckBox c = mCheckboxes.get(i); if (c.isChecked()) { vc.add(new Selection(mItems.get(i))); } } if (vc.size() == 0) { return null; } else { return new SelectMultiData(vc); } } @Override public void setFocus(Context context) { // Hide the soft keyboard if it's showing. InputMethodManager inputManager = (InputMethodManager) context .getSystemService(Context.INPUT_METHOD_SERVICE); inputManager.hideSoftInputFromWindow(this.getWindowToken(), 0); } @Override public void setOnLongClickListener(OnLongClickListener l) { for (CheckBox c : mCheckboxes) { c.setOnLongClickListener(l); } } @Override public void cancelLongPress() { super.cancelLongPress(); for (CheckBox c : mCheckboxes) { c.cancelLongPress(); } } }