Java tutorial
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- * ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Mozilla Android code. * * The Initial Developer of the Original Code is Mozilla Foundation. * Portions created by the Initial Developer are Copyright (C) 2011 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Wes Johnston <wjohnston@mozilla.com> * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ package org.mozilla.gecko; import android.util.Log; import java.lang.String; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.content.DialogInterface.OnCancelListener; import android.content.DialogInterface.OnMultiChoiceClickListener; import android.content.res.Resources; import android.graphics.Color; import android.text.InputType; import android.text.method.PasswordTransformationMethod; import android.util.TypedValue; import android.view.View; import android.view.ViewGroup; import android.view.LayoutInflater; import android.view.ViewGroup.LayoutParams; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.TextView; import android.widget.CheckBox; import android.widget.CheckedTextView; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.Spinner; import android.widget.ArrayAdapter; import android.widget.ListView; import org.json.JSONArray; import org.json.JSONObject; import android.text.InputType; import org.mozilla.fennec_satyanarayan.R; public class PromptService implements OnClickListener, OnCancelListener, OnItemClickListener { private static final String LOGTAG = "GeckoPromptService"; private PromptInput[] mInputs; private AlertDialog mDialog = null; private static LayoutInflater mInflater; private final static int PADDING_SIZE = 32; // in dip units private static int mPaddingSize = 0; // calculated from PADDING_SIZE. In pixel units PromptService() { mInflater = LayoutInflater.from(GeckoApp.mAppContext); Resources res = GeckoApp.mAppContext.getResources(); mPaddingSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, PADDING_SIZE, res.getDisplayMetrics()); } private class PromptButton { public String label = ""; PromptButton(JSONObject aJSONButton) { try { label = aJSONButton.getString("label"); } catch (Exception ex) { } } } private class PromptInput { private String label = ""; private String type = ""; private String hint = ""; private JSONObject mJSONInput = null; private View view = null; public PromptInput(JSONObject aJSONInput) { mJSONInput = aJSONInput; try { label = aJSONInput.getString("label"); } catch (Exception ex) { } try { type = aJSONInput.getString("type"); } catch (Exception ex) { } try { hint = aJSONInput.getString("hint"); } catch (Exception ex) { } } public View getView() { if (type.equals("checkbox")) { CheckBox checkbox = new CheckBox(GeckoApp.mAppContext); checkbox.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); checkbox.setText(label); try { Boolean value = mJSONInput.getBoolean("checked"); checkbox.setChecked(value); } catch (Exception ex) { } view = (View) checkbox; } else if (type.equals("textbox") || this.type.equals("password")) { EditText input = new EditText(GeckoApp.mAppContext); int inputtype = InputType.TYPE_CLASS_TEXT; if (type.equals("password")) { inputtype |= InputType.TYPE_TEXT_VARIATION_PASSWORD | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS; } input.setInputType(inputtype); try { String value = mJSONInput.getString("value"); input.setText(value); } catch (Exception ex) { } if (!hint.equals("")) { input.setHint(hint); } view = (View) input; } else if (type.equals("menulist")) { Spinner spinner = new Spinner(GeckoApp.mAppContext); try { String[] listitems = getStringArray(mJSONInput, "values"); if (listitems.length > 0) { ArrayAdapter<String> adapter = new ArrayAdapter<String>(GeckoApp.mAppContext, android.R.layout.simple_dropdown_item_1line, listitems); spinner.setAdapter(adapter); } } catch (Exception ex) { } view = (View) spinner; } return view; } public String getName() { return type; } public String getValue() { if (this.type.equals("checkbox")) { CheckBox checkbox = (CheckBox) view; return checkbox.isChecked() ? "true" : "false"; } else if (type.equals("textbox") || type.equals("password")) { EditText edit = (EditText) view; return edit.getText().toString(); } else if (type.equals("menulist")) { Spinner spinner = (Spinner) view; return Integer.toString(spinner.getSelectedItemPosition()); } return ""; } } public void Show(String aTitle, String aText, PromptButton[] aButtons, PromptListItem[] aMenuList, boolean aMultipleSelection) { AlertDialog.Builder builder = new AlertDialog.Builder(GeckoApp.mAppContext); if (!aTitle.equals("")) { builder.setTitle(aTitle); } if (!aText.equals("")) { builder.setMessage(aText); } int length = mInputs.length; if (aMenuList.length > 0) { int resourceId = android.R.layout.select_dialog_item; if (mSelected != null && mSelected.length > 0) { if (aMultipleSelection) { resourceId = android.R.layout.select_dialog_multichoice; } else { resourceId = android.R.layout.select_dialog_singlechoice; } } PromptListAdapter adapter = new PromptListAdapter(GeckoApp.mAppContext, resourceId, aMenuList); if (mSelected != null && mSelected.length > 0) { if (aMultipleSelection) { adapter.listView = (ListView) mInflater.inflate(R.layout.select_dialog_list, null); adapter.listView.setOnItemClickListener(this); builder.setInverseBackgroundForced(true); adapter.listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); adapter.listView.setAdapter(adapter); builder.setView(adapter.listView); } else { int selectedIndex = -1; for (int i = 0; i < mSelected.length; i++) { if (mSelected[i]) { selectedIndex = i; break; } } mSelected = null; builder.setSingleChoiceItems(adapter, selectedIndex, this); } } else { builder.setAdapter(adapter, this); mSelected = null; } } else if (length == 1) { builder.setView(mInputs[0].getView()); } else if (length > 1) { LinearLayout linearLayout = new LinearLayout(GeckoApp.mAppContext); linearLayout.setOrientation(LinearLayout.VERTICAL); for (int i = 0; i < length; i++) { View content = mInputs[i].getView(); linearLayout.addView(content); } builder.setView((View) linearLayout); } length = aButtons.length; if (length > 0) { builder.setPositiveButton(aButtons[0].label, this); } if (length > 1) { builder.setNeutralButton(aButtons[1].label, this); } if (length > 2) { builder.setNegativeButton(aButtons[2].label, this); } mDialog = builder.create(); mDialog.setOnCancelListener(this); mDialog.show(); } public void onClick(DialogInterface aDialog, int aWhich) { JSONObject ret = new JSONObject(); try { int button = -1; ListView list = mDialog.getListView(); if (list != null || mSelected != null) { button = aWhich; if (mSelected != null) { JSONArray selected = new JSONArray(); for (int i = 0; i < mSelected.length; i++) { selected.put(mSelected[i]); } ret.put("button", selected); } else { ret.put("button", button); } } else { switch (aWhich) { case DialogInterface.BUTTON_POSITIVE: button = 0; break; case DialogInterface.BUTTON_NEUTRAL: button = 1; break; case DialogInterface.BUTTON_NEGATIVE: button = 2; break; } ret.put("button", button); } if (mInputs != null) { for (int i = 0; i < mInputs.length; i++) { ret.put(mInputs[i].getName(), mInputs[i].getValue()); } } } catch (Exception ex) { Log.i(LOGTAG, "Error building return: " + ex); } if (mDialog != null) { mDialog.dismiss(); } finishDialog(ret.toString()); } private boolean[] mSelected = null; public void onItemClick(AdapterView<?> parent, View view, int position, long id) { mSelected[position] = !mSelected[position]; } public void onCancel(DialogInterface aDialog) { JSONObject ret = new JSONObject(); try { ret.put("button", -1); } catch (Exception ex) { } finishDialog(ret.toString()); } public void finishDialog(String aReturn) { mInputs = null; mDialog = null; mSelected = null; try { GeckoAppShell.sPromptQueue.put(aReturn); } catch (Exception ex) { } } public void processMessage(JSONObject geckoObject) { String title = ""; try { title = geckoObject.getString("title"); } catch (Exception ex) { } String text = ""; try { text = geckoObject.getString("text"); } catch (Exception ex) { } JSONArray buttons = new JSONArray(); try { buttons = geckoObject.getJSONArray("buttons"); } catch (Exception ex) { } int length = buttons.length(); PromptButton[] promptbuttons = new PromptButton[length]; for (int i = 0; i < length; i++) { try { promptbuttons[i] = new PromptButton(buttons.getJSONObject(i)); } catch (Exception ex) { } } JSONArray inputs = new JSONArray(); try { inputs = geckoObject.getJSONArray("inputs"); } catch (Exception ex) { } length = inputs.length(); mInputs = new PromptInput[length]; for (int i = 0; i < length; i++) { try { mInputs[i] = new PromptInput(inputs.getJSONObject(i)); } catch (Exception ex) { } } PromptListItem[] menuitems = getListItemArray(geckoObject, "listitems"); mSelected = getBooleanArray(geckoObject, "selected"); boolean multiple = false; try { multiple = geckoObject.getBoolean("multiple"); } catch (Exception ex) { } this.Show(title, text, promptbuttons, menuitems, multiple); } private String[] getStringArray(JSONObject aObject, String aName) { JSONArray items = new JSONArray(); try { items = aObject.getJSONArray(aName); } catch (Exception ex) { } int length = items.length(); String[] list = new String[length]; for (int i = 0; i < length; i++) { try { list[i] = items.getString(i); } catch (Exception ex) { } } return list; } private boolean[] getBooleanArray(JSONObject aObject, String aName) { JSONArray items = new JSONArray(); try { items = aObject.getJSONArray(aName); } catch (Exception ex) { return null; } int length = items.length(); boolean[] list = new boolean[length]; for (int i = 0; i < length; i++) { try { list[i] = items.getBoolean(i); } catch (Exception ex) { } } return list; } private PromptListItem[] getListItemArray(JSONObject aObject, String aName) { JSONArray items = new JSONArray(); try { items = aObject.getJSONArray(aName); } catch (Exception ex) { } int length = items.length(); PromptListItem[] list = new PromptListItem[length]; for (int i = 0; i < length; i++) { try { list[i] = new PromptListItem(items.getJSONObject(i)); } catch (Exception ex) { } } return list; } private class PromptListItem { public String label = ""; public boolean isGroup = false; public boolean inGroup = false; public boolean disabled = false; public int id = 0; PromptListItem(JSONObject aObject) { try { label = aObject.getString("label"); } catch (Exception ex) { } try { isGroup = aObject.getBoolean("isGroup"); } catch (Exception ex) { } try { inGroup = aObject.getBoolean("inGroup"); } catch (Exception ex) { } try { disabled = aObject.getBoolean("disabled"); } catch (Exception ex) { } try { id = aObject.getInt("id"); } catch (Exception ex) { } } } public class PromptListAdapter extends ArrayAdapter<PromptListItem> { public ListView listView = null; private PromptListItem[] mList; private int mResourceId = -1; PromptListAdapter(Context context, int textViewResourceId, PromptListItem[] objects) { super(context, textViewResourceId, objects); mList = objects; mResourceId = textViewResourceId; } public int getCount() { return mList.length; } public PromptListItem getItem(int position) { return mList[position]; } public long getItemId(int position) { return mList[position].id; } public View getView(int position, View convertView, ViewGroup parent) { PromptListItem item = getItem(position); int resourceId = mResourceId; if (item.isGroup) { resourceId = R.layout.list_item_header; } View row = mInflater.inflate(resourceId, null); if (!item.isGroup) { try { CheckedTextView ct = (CheckedTextView) row.findViewById(android.R.id.text1); if (ct != null) { ct.setEnabled(!item.disabled); ct.setClickable(item.disabled); // Apparently just using ct.setChecked(true) doesn't work, so this // is stolen from the android source code as a way to set the checked // state of these items if (mSelected[position] && listView != null) { listView.setItemChecked(position, true); } if (item.inGroup) { ct.setPadding(mPaddingSize, 0, 0, 0); } } } catch (Exception ex) { } } TextView t1 = (TextView) row.findViewById(android.R.id.text1); if (t1 != null) { t1.setText(item.label); } return row; } } }