/ocr/ocrservice/src/com/googlecode/eyesfree/ocr/client/VersionAlert.java

  1/*
  2 * Copyright (C) 2011 Google Inc.
  3 *
  4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
  5 * use this file except in compliance with the License. You may obtain a copy of
  6 * the License at
  7 *
  8 * http://www.apache.org/licenses/LICENSE-2.0
  9 *
 10 * Unless required by applicable law or agreed to in writing, software
 11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 13 * License for the specific language governing permissions and limitations under
 14 * the License.
 15 */
 16
 17package com.googlecode.eyesfree.ocr.client;
 18
 19import android.app.AlertDialog;
 20import android.content.Context;
 21import android.content.DialogInterface;
 22import android.content.DialogInterface.OnClickListener;
 23import android.content.Intent;
 24import android.net.Uri;
 25
 26/**
 27 * Creates an alert dialog that directs the user to the App Market.
 28 *
 29 * @author alanv@google.com (Alan Viverette)
 30 */
 31public class VersionAlert {
 32    private final static String MARKET_URI = "market://search?q=pname:com.googlecode.eyesfree.ocr";
 33
 34    public static String install = "This application requires the Mobile OCR library for text recognition.";
 35    public static String install_title = "Install OCR Library";
 36    public static String install_positive = "Install";
 37    public static String install_negative = "Do not install";
 38    public static String update = "This application requires a newer version of the Mobile OCR library.";
 39    public static String update_title = "Update OCR Library";
 40    public static String update_positive = "Update";
 41    public static String update_negative = "Do not update";
 42    public static String sdcard = "Please insert an SD card or turn off USB storage.";
 43    public static String sdcard_title = "Insert SD Card";
 44    public static String sdcard_neutral = "OK";
 45    public static String languages = "Please install at least one Mobile OCR language pack.";
 46    public static String languages_title = "Install OCR Languages";
 47    public static String languages_positive = "Select language";
 48    public static String languages_negative = "Do not install";
 49
 50    private VersionAlert() {
 51        // This class is not instantiable.
 52    }
 53
 54    /**
 55     * Returns an install dialog.
 56     *
 57     * @param context
 58     * @param onNegative
 59     * @return An install dialog.
 60     */
 61    public static AlertDialog createInstallAlert(final Context context, OnClickListener onNegative) {
 62        OnClickListener onPositive = new OnClickListener() {
 63            @Override
 64            public void onClick(DialogInterface dialog, int which) {
 65                Uri marketUri = Uri.parse(MARKET_URI);
 66                Intent marketIntent = new Intent(Intent.ACTION_VIEW, marketUri);
 67                context.startActivity(marketIntent);
 68            }
 69        };
 70
 71        AlertDialog alert = new AlertDialog.Builder(context).setMessage(install)
 72                .setTitle(install_title).setPositiveButton(install_positive, onPositive)
 73                .setNegativeButton(install_negative, onNegative).create();
 74
 75        return alert;
 76    }
 77
 78    /**
 79     * Returns an update dialog.
 80     *
 81     * @param context
 82     * @param onNegative
 83     * @return An update dialog.
 84     */
 85    public static AlertDialog createUpdateAlert(final Context context, OnClickListener onNegative) {
 86        OnClickListener onPositive = new OnClickListener() {
 87            @Override
 88            public void onClick(DialogInterface dialog, int which) {
 89                Uri marketUri = Uri.parse(MARKET_URI);
 90                Intent marketIntent = new Intent(Intent.ACTION_VIEW, marketUri);
 91                context.startActivity(marketIntent);
 92            }
 93        };
 94
 95        AlertDialog alert = new AlertDialog.Builder(context).setMessage(update)
 96                .setTitle(update_title).setPositiveButton(update_positive, onPositive)
 97                .setNegativeButton(update_negative, onNegative).create();
 98
 99        return alert;
100    }
101
102    /**
103     * Returns a storage alert dialog.
104     *
105     * @param context
106     * @param onNeutral
107     * @return A storage alert dialog.
108     */
109    public static AlertDialog createStorageAlert(final Context context, OnClickListener onNeutral) {
110        AlertDialog alert = new AlertDialog.Builder(context).setMessage(sdcard)
111                .setTitle(sdcard_title).setNeutralButton(sdcard_neutral, onNeutral).create();
112
113        return alert;
114    }
115
116    /**
117     * Creates an alert requesting that the user install a language.
118     *
119     * @param context
120     * @param onPositive action to perform if the user accepts
121     * @param onNegative action to perform if the user declines
122     * @return alert dialog
123     */
124    public static AlertDialog createLanguagesAlert(final Context context,
125            final OnClickListener onPositive, OnClickListener onNegative) {
126        OnClickListener onRealPositive = new OnClickListener() {
127            @Override
128            public void onClick(DialogInterface dialog, int which) {
129                Intent languagesIntent = new Intent(Intents.Languages.ACTION);
130                context.startActivity(languagesIntent);
131                onPositive.onClick(dialog, which);
132            }
133        };
134
135        AlertDialog alert = new AlertDialog.Builder(context).setMessage(languages)
136                .setTitle(languages_title).setPositiveButton(languages_positive, onRealPositive)
137                .setNegativeButton(languages_negative, onNegative).create();
138
139        return alert;
140    }
141}