Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of 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, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.calendar; |
| 18 | |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 19 | import com.android.calendar.event.EditEventHelper.AttendeeItem; |
| 20 | |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 21 | import android.content.Context; |
| 22 | import android.graphics.drawable.Drawable; |
| 23 | import android.net.Uri; |
| 24 | import android.os.Handler; |
| 25 | import android.os.HandlerThread; |
| 26 | import android.os.Looper; |
| 27 | import android.os.Message; |
| 28 | import android.provider.ContactsContract.Contacts; |
| 29 | import android.util.Log; |
| 30 | import android.view.View; |
| 31 | import android.widget.ImageView; |
| 32 | |
| 33 | import java.io.InputStream; |
| 34 | |
| 35 | /** |
| 36 | * Helper class for async access of images. |
| 37 | */ |
| 38 | public class ContactsAsyncHelper extends Handler { |
| 39 | |
| 40 | private static final boolean DBG = false; |
| 41 | private static final String LOG_TAG = "ContactsAsyncHelper"; |
| 42 | |
Erik | a7694ee | 2010-12-07 15:46:18 -0800 | [diff] [blame] | 43 | private static ContactsAsyncHelper mInstance = null; |
| 44 | |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 45 | /** |
| 46 | * Interface for a WorkerHandler result return. |
| 47 | */ |
| 48 | public interface OnImageLoadCompleteListener { |
| 49 | /** |
| 50 | * Called when the image load is complete. |
| 51 | * |
| 52 | * @param imagePresent true if an image was found |
| 53 | */ |
| 54 | public void onImageLoadComplete(int token, Object cookie, ImageView iView, |
| 55 | boolean imagePresent); |
| 56 | } |
| 57 | |
| 58 | // constants |
| 59 | private static final int EVENT_LOAD_IMAGE = 1; |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 60 | private static final int EVENT_LOAD_DRAWABLE = 2; |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 61 | private static final int DEFAULT_TOKEN = -1; |
| 62 | |
| 63 | // static objects |
| 64 | private static Handler sThreadHandler; |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 65 | |
| 66 | private static final class WorkerArgs { |
| 67 | public Context context; |
| 68 | public ImageView view; |
| 69 | public Uri uri; |
| 70 | public int defaultResource; |
| 71 | public Object result; |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 72 | public AttendeeItem item; |
| 73 | public Runnable callback; |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Thread worker class that handles the task of opening the stream and loading |
| 78 | * the images. |
| 79 | */ |
| 80 | private class WorkerHandler extends Handler { |
| 81 | public WorkerHandler(Looper looper) { |
| 82 | super(looper); |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public void handleMessage(Message msg) { |
| 87 | WorkerArgs args = (WorkerArgs) msg.obj; |
| 88 | |
| 89 | switch (msg.arg1) { |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 90 | case EVENT_LOAD_DRAWABLE: |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 91 | case EVENT_LOAD_IMAGE: |
| 92 | InputStream inputStream = null; |
| 93 | try { |
| 94 | inputStream = Contacts.openContactPhotoInputStream( |
| 95 | args.context.getContentResolver(), args.uri); |
| 96 | } catch (Exception e) { |
| 97 | Log.e(LOG_TAG, "Error opening photo input stream", e); |
| 98 | } |
| 99 | |
| 100 | if (inputStream != null) { |
| 101 | args.result = Drawable.createFromStream(inputStream, args.uri.toString()); |
| 102 | |
| 103 | if (DBG) Log.d(LOG_TAG, "Loading image: " + msg.arg1 + |
| 104 | " token: " + msg.what + " image URI: " + args.uri); |
| 105 | } else { |
| 106 | args.result = null; |
| 107 | if (DBG) Log.d(LOG_TAG, "Problem with image: " + msg.arg1 + |
| 108 | " token: " + msg.what + " image URI: " + args.uri + |
| 109 | ", using default image."); |
| 110 | } |
| 111 | break; |
| 112 | default: |
| 113 | } |
| 114 | |
| 115 | // send the reply to the enclosing class. |
| 116 | Message reply = ContactsAsyncHelper.this.obtainMessage(msg.what); |
| 117 | reply.arg1 = msg.arg1; |
| 118 | reply.obj = msg.obj; |
| 119 | reply.sendToTarget(); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Private constructor for static class |
| 125 | */ |
| 126 | private ContactsAsyncHelper() { |
| 127 | HandlerThread thread = new HandlerThread("ContactsAsyncWorker"); |
| 128 | thread.start(); |
| 129 | sThreadHandler = new WorkerHandler(thread.getLooper()); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Start an image load, attach the result to the specified CallerInfo object. |
| 134 | * Note, when the query is started, we make the ImageView INVISIBLE if the |
| 135 | * placeholderImageResource value is -1. When we're given a valid (!= -1) |
| 136 | * placeholderImageResource value, we make sure the image is visible. |
| 137 | */ |
| 138 | public static final void updateImageViewWithContactPhotoAsync(Context context, |
Daniel Lehmann | 8fa3111 | 2012-02-07 14:37:19 -0800 | [diff] [blame] | 139 | ImageView imageView, Uri contact, int placeholderImageResource) { |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 140 | |
| 141 | // in case the source caller info is null, the URI will be null as well. |
| 142 | // just update using the placeholder image in this case. |
Daniel Lehmann | 8fa3111 | 2012-02-07 14:37:19 -0800 | [diff] [blame] | 143 | if (contact == null) { |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 144 | if (DBG) Log.d(LOG_TAG, "target image is null, just display placeholder."); |
| 145 | imageView.setVisibility(View.VISIBLE); |
| 146 | imageView.setImageResource(placeholderImageResource); |
| 147 | return; |
| 148 | } |
| 149 | |
| 150 | // Added additional Cookie field in the callee to handle arguments |
| 151 | // sent to the callback function. |
| 152 | |
| 153 | // setup arguments |
| 154 | WorkerArgs args = new WorkerArgs(); |
| 155 | args.context = context; |
| 156 | args.view = imageView; |
Daniel Lehmann | 8fa3111 | 2012-02-07 14:37:19 -0800 | [diff] [blame] | 157 | args.uri = contact; |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 158 | args.defaultResource = placeholderImageResource; |
| 159 | |
Erik | a7694ee | 2010-12-07 15:46:18 -0800 | [diff] [blame] | 160 | if (mInstance == null) { |
| 161 | mInstance = new ContactsAsyncHelper(); |
| 162 | } |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 163 | // setup message arguments |
| 164 | Message msg = sThreadHandler.obtainMessage(DEFAULT_TOKEN); |
| 165 | msg.arg1 = EVENT_LOAD_IMAGE; |
| 166 | msg.obj = args; |
| 167 | |
| 168 | if (DBG) Log.d(LOG_TAG, "Begin loading image: " + args.uri + |
| 169 | ", displaying default image for now."); |
| 170 | |
| 171 | // set the default image first, when the query is complete, we will |
| 172 | // replace the image with the correct one. |
| 173 | if (placeholderImageResource != -1) { |
| 174 | imageView.setVisibility(View.VISIBLE); |
| 175 | imageView.setImageResource(placeholderImageResource); |
| 176 | } else { |
| 177 | imageView.setVisibility(View.INVISIBLE); |
| 178 | } |
| 179 | |
| 180 | // notify the thread to begin working |
| 181 | sThreadHandler.sendMessage(msg); |
| 182 | } |
| 183 | |
| 184 | /** |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 185 | * Start an image load, attach the result to the specified CallerInfo object. |
| 186 | * Note, when the query is started, we make the ImageView INVISIBLE if the |
| 187 | * placeholderImageResource value is -1. When we're given a valid (!= -1) |
| 188 | * placeholderImageResource value, we make sure the image is visible. |
| 189 | */ |
| 190 | public static final void retrieveContactPhotoAsync(Context context, |
Daniel Lehmann | 8fa3111 | 2012-02-07 14:37:19 -0800 | [diff] [blame] | 191 | AttendeeItem item, Runnable run, Uri photoUri) { |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 192 | |
| 193 | // in case the source caller info is null, the URI will be null as well. |
| 194 | // just return as there's nothing to do. |
Daniel Lehmann | 8fa3111 | 2012-02-07 14:37:19 -0800 | [diff] [blame] | 195 | if (photoUri == null) { |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 196 | return; |
| 197 | } |
| 198 | |
| 199 | // Added additional Cookie field in the callee to handle arguments |
| 200 | // sent to the callback function. |
| 201 | |
| 202 | // setup arguments |
| 203 | WorkerArgs args = new WorkerArgs(); |
| 204 | args.context = context; |
| 205 | args.item = item; |
Daniel Lehmann | 8fa3111 | 2012-02-07 14:37:19 -0800 | [diff] [blame] | 206 | args.uri = photoUri; |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 207 | args.callback = run; |
| 208 | |
Erik | a7694ee | 2010-12-07 15:46:18 -0800 | [diff] [blame] | 209 | if (mInstance == null) { |
| 210 | mInstance = new ContactsAsyncHelper(); |
| 211 | } |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 212 | // setup message arguments |
| 213 | Message msg = sThreadHandler.obtainMessage(DEFAULT_TOKEN); |
| 214 | msg.arg1 = EVENT_LOAD_DRAWABLE; |
| 215 | msg.obj = args; |
| 216 | |
| 217 | if (DBG) Log.d(LOG_TAG, "Begin loading drawable: " + args.uri); |
| 218 | |
| 219 | |
| 220 | // notify the thread to begin working |
| 221 | sThreadHandler.sendMessage(msg); |
| 222 | } |
| 223 | |
| 224 | /** |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 225 | * Called when loading is done. |
| 226 | */ |
| 227 | @Override |
| 228 | public void handleMessage(Message msg) { |
| 229 | WorkerArgs args = (WorkerArgs) msg.obj; |
| 230 | switch (msg.arg1) { |
| 231 | case EVENT_LOAD_IMAGE: |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 232 | // if the image has been loaded then display it, otherwise set default. |
| 233 | // in either case, make sure the image is visible. |
| 234 | if (args.result != null) { |
| 235 | args.view.setVisibility(View.VISIBLE); |
| 236 | args.view.setImageDrawable((Drawable) args.result); |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 237 | } else if (args.defaultResource != -1) { |
| 238 | args.view.setVisibility(View.VISIBLE); |
| 239 | args.view.setImageResource(args.defaultResource); |
| 240 | } |
| 241 | break; |
Erik | d845fbe | 2010-08-12 11:20:01 -0700 | [diff] [blame] | 242 | case EVENT_LOAD_DRAWABLE: |
| 243 | if (args.result != null) { |
| 244 | args.item.mBadge = (Drawable) args.result; |
| 245 | if (args.callback != null) { |
| 246 | args.callback.run(); |
| 247 | } |
| 248 | } |
| 249 | break; |
Michael Chan | 037c069 | 2010-02-09 13:32:22 -0800 | [diff] [blame] | 250 | default: |
| 251 | } |
| 252 | } |
| 253 | } |