Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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.example.android.supportv4.app; |
| 18 | |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 19 | import android.content.BroadcastReceiver; |
| 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.content.IntentFilter; |
| 23 | import android.content.pm.ActivityInfo; |
| 24 | import android.content.pm.ApplicationInfo; |
| 25 | import android.content.pm.PackageManager; |
| 26 | import android.content.res.Configuration; |
| 27 | import android.content.res.Resources; |
| 28 | import android.graphics.drawable.Drawable; |
| 29 | import android.os.Bundle; |
| 30 | import android.support.v4.app.FragmentActivity; |
| 31 | import android.support.v4.app.FragmentManager; |
| 32 | import android.support.v4.app.ListFragment; |
| 33 | import android.support.v4.app.LoaderManager; |
| 34 | import android.support.v4.content.AsyncTaskLoader; |
Aurimas Liutikas | 67949f5 | 2016-10-04 11:33:19 -0700 | [diff] [blame] | 35 | import android.support.v4.content.ContextCompat; |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 36 | import android.support.v4.content.Loader; |
Svetoslav Ganov | 109979e | 2011-11-14 16:37:43 -0800 | [diff] [blame] | 37 | import android.support.v4.content.pm.ActivityInfoCompat; |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 38 | import android.text.TextUtils; |
| 39 | import android.util.Log; |
| 40 | import android.view.LayoutInflater; |
| 41 | import android.view.Menu; |
| 42 | import android.view.MenuInflater; |
| 43 | import android.view.MenuItem; |
| 44 | import android.view.View; |
| 45 | import android.view.ViewGroup; |
| 46 | import android.widget.ArrayAdapter; |
| 47 | import android.widget.ImageView; |
| 48 | import android.widget.ListView; |
Aurimas Liutikas | d353bdc | 2017-02-07 08:50:11 -0800 | [diff] [blame] | 49 | import android.widget.SearchView; |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 50 | import android.widget.TextView; |
Svetoslav Ganov | 109979e | 2011-11-14 16:37:43 -0800 | [diff] [blame] | 51 | |
| 52 | import com.example.android.supportv4.R; |
| 53 | |
| 54 | import java.io.File; |
| 55 | import java.text.Collator; |
| 56 | import java.util.ArrayList; |
| 57 | import java.util.Collections; |
| 58 | import java.util.Comparator; |
| 59 | import java.util.List; |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 60 | |
| 61 | /** |
| 62 | * Demonstration of the implementation of a custom Loader. |
| 63 | */ |
| 64 | public class LoaderCustomSupport extends FragmentActivity { |
| 65 | |
| 66 | @Override |
| 67 | protected void onCreate(Bundle savedInstanceState) { |
| 68 | super.onCreate(savedInstanceState); |
| 69 | |
| 70 | FragmentManager fm = getSupportFragmentManager(); |
| 71 | |
| 72 | // Create the list fragment and add it as our sole content. |
| 73 | if (fm.findFragmentById(android.R.id.content) == null) { |
| 74 | AppListFragment list = new AppListFragment(); |
| 75 | fm.beginTransaction().add(android.R.id.content, list).commit(); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | //BEGIN_INCLUDE(loader) |
| 80 | /** |
| 81 | * This class holds the per-item data in our Loader. |
| 82 | */ |
| 83 | public static class AppEntry { |
| 84 | public AppEntry(AppListLoader loader, ApplicationInfo info) { |
| 85 | mLoader = loader; |
| 86 | mInfo = info; |
| 87 | mApkFile = new File(info.sourceDir); |
| 88 | } |
| 89 | |
| 90 | public ApplicationInfo getApplicationInfo() { |
| 91 | return mInfo; |
| 92 | } |
| 93 | |
| 94 | public String getLabel() { |
| 95 | return mLabel; |
| 96 | } |
| 97 | |
| 98 | public Drawable getIcon() { |
| 99 | if (mIcon == null) { |
| 100 | if (mApkFile.exists()) { |
| 101 | mIcon = mInfo.loadIcon(mLoader.mPm); |
| 102 | return mIcon; |
| 103 | } else { |
| 104 | mMounted = false; |
| 105 | } |
| 106 | } else if (!mMounted) { |
| 107 | // If the app wasn't mounted but is now mounted, reload |
| 108 | // its icon. |
| 109 | if (mApkFile.exists()) { |
| 110 | mMounted = true; |
| 111 | mIcon = mInfo.loadIcon(mLoader.mPm); |
| 112 | return mIcon; |
| 113 | } |
| 114 | } else { |
| 115 | return mIcon; |
| 116 | } |
| 117 | |
Aurimas Liutikas | 67949f5 | 2016-10-04 11:33:19 -0700 | [diff] [blame] | 118 | return ContextCompat.getDrawable( |
| 119 | mLoader.getContext(), android.R.drawable.sym_def_app_icon); |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | @Override public String toString() { |
| 123 | return mLabel; |
| 124 | } |
| 125 | |
| 126 | void loadLabel(Context context) { |
| 127 | if (mLabel == null || !mMounted) { |
| 128 | if (!mApkFile.exists()) { |
| 129 | mMounted = false; |
| 130 | mLabel = mInfo.packageName; |
| 131 | } else { |
| 132 | mMounted = true; |
| 133 | CharSequence label = mInfo.loadLabel(context.getPackageManager()); |
| 134 | mLabel = label != null ? label.toString() : mInfo.packageName; |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | private final AppListLoader mLoader; |
| 140 | private final ApplicationInfo mInfo; |
| 141 | private final File mApkFile; |
| 142 | private String mLabel; |
| 143 | private Drawable mIcon; |
| 144 | private boolean mMounted; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Perform alphabetical comparison of application entry objects. |
| 149 | */ |
| 150 | public static final Comparator<AppEntry> ALPHA_COMPARATOR = new Comparator<AppEntry>() { |
| 151 | private final Collator sCollator = Collator.getInstance(); |
| 152 | @Override |
| 153 | public int compare(AppEntry object1, AppEntry object2) { |
| 154 | return sCollator.compare(object1.getLabel(), object2.getLabel()); |
| 155 | } |
| 156 | }; |
| 157 | |
| 158 | /** |
| 159 | * Helper for determining if the configuration has changed in an interesting |
| 160 | * way so we need to rebuild the app list. |
| 161 | */ |
| 162 | public static class InterestingConfigChanges { |
| 163 | final Configuration mLastConfiguration = new Configuration(); |
| 164 | int mLastDensity; |
| 165 | |
| 166 | boolean applyNewConfig(Resources res) { |
| 167 | int configChanges = mLastConfiguration.updateFrom(res.getConfiguration()); |
| 168 | boolean densityChanged = mLastDensity != res.getDisplayMetrics().densityDpi; |
| 169 | if (densityChanged || (configChanges&(ActivityInfo.CONFIG_LOCALE |
Svetoslav Ganov | 109979e | 2011-11-14 16:37:43 -0800 | [diff] [blame] | 170 | |ActivityInfoCompat.CONFIG_UI_MODE|ActivityInfo.CONFIG_SCREEN_LAYOUT)) != 0) { |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 171 | mLastDensity = res.getDisplayMetrics().densityDpi; |
| 172 | return true; |
| 173 | } |
| 174 | return false; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Helper class to look for interesting changes to the installed apps |
| 180 | * so that the loader can be updated. |
| 181 | */ |
| 182 | public static class PackageIntentReceiver extends BroadcastReceiver { |
| 183 | final AppListLoader mLoader; |
| 184 | |
| 185 | public PackageIntentReceiver(AppListLoader loader) { |
| 186 | mLoader = loader; |
| 187 | IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED); |
| 188 | filter.addAction(Intent.ACTION_PACKAGE_REMOVED); |
| 189 | filter.addAction(Intent.ACTION_PACKAGE_CHANGED); |
| 190 | filter.addDataScheme("package"); |
| 191 | mLoader.getContext().registerReceiver(this, filter); |
| 192 | // Register for events related to sdcard installation. |
| 193 | IntentFilter sdFilter = new IntentFilter(); |
Aurimas Liutikas | ddffc06 | 2017-02-07 14:56:46 -0800 | [diff] [blame] | 194 | sdFilter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE); |
| 195 | sdFilter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE); |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 196 | mLoader.getContext().registerReceiver(this, sdFilter); |
| 197 | } |
| 198 | |
| 199 | @Override public void onReceive(Context context, Intent intent) { |
| 200 | // Tell the loader about the change. |
| 201 | mLoader.onContentChanged(); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * A custom Loader that loads all of the installed applications. |
| 207 | */ |
| 208 | public static class AppListLoader extends AsyncTaskLoader<List<AppEntry>> { |
| 209 | final InterestingConfigChanges mLastConfig = new InterestingConfigChanges(); |
| 210 | final PackageManager mPm; |
| 211 | |
| 212 | List<AppEntry> mApps; |
| 213 | PackageIntentReceiver mPackageObserver; |
| 214 | |
| 215 | public AppListLoader(Context context) { |
| 216 | super(context); |
| 217 | |
| 218 | // Retrieve the package manager for later use; note we don't |
| 219 | // use 'context' directly but instead the save global application |
| 220 | // context returned by getContext(). |
| 221 | mPm = getContext().getPackageManager(); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * This is where the bulk of our work is done. This function is |
| 226 | * called in a background thread and should generate a new set of |
| 227 | * data to be published by the loader. |
| 228 | */ |
| 229 | @Override public List<AppEntry> loadInBackground() { |
| 230 | // Retrieve all known applications. |
Alan Viverette | ce390fc | 2017-02-28 10:15:48 -0500 | [diff] [blame] | 231 | //noinspection WrongConstant |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 232 | List<ApplicationInfo> apps = mPm.getInstalledApplications( |
Aurimas Liutikas | 67949f5 | 2016-10-04 11:33:19 -0700 | [diff] [blame] | 233 | PackageManager.MATCH_UNINSTALLED_PACKAGES |
| 234 | | PackageManager.MATCH_DISABLED_COMPONENTS); |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 235 | if (apps == null) { |
| 236 | apps = new ArrayList<ApplicationInfo>(); |
| 237 | } |
| 238 | |
| 239 | final Context context = getContext(); |
| 240 | |
| 241 | // Create corresponding array of entries and load their labels. |
| 242 | List<AppEntry> entries = new ArrayList<AppEntry>(apps.size()); |
Aurimas Liutikas | 67949f5 | 2016-10-04 11:33:19 -0700 | [diff] [blame] | 243 | for (int i = 0; i < apps.size(); i++) { |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 244 | AppEntry entry = new AppEntry(this, apps.get(i)); |
| 245 | entry.loadLabel(context); |
| 246 | entries.add(entry); |
| 247 | } |
| 248 | |
| 249 | // Sort the list. |
| 250 | Collections.sort(entries, ALPHA_COMPARATOR); |
| 251 | |
| 252 | // Done! |
| 253 | return entries; |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Called when there is new data to deliver to the client. The |
| 258 | * super class will take care of delivering it; the implementation |
| 259 | * here just adds a little more logic. |
| 260 | */ |
| 261 | @Override public void deliverResult(List<AppEntry> apps) { |
| 262 | if (isReset()) { |
| 263 | // An async query came in while the loader is stopped. We |
| 264 | // don't need the result. |
| 265 | if (apps != null) { |
| 266 | onReleaseResources(apps); |
| 267 | } |
| 268 | } |
| 269 | List<AppEntry> oldApps = apps; |
| 270 | mApps = apps; |
| 271 | |
| 272 | if (isStarted()) { |
| 273 | // If the Loader is currently started, we can immediately |
| 274 | // deliver its results. |
| 275 | super.deliverResult(apps); |
| 276 | } |
| 277 | |
| 278 | // At this point we can release the resources associated with |
| 279 | // 'oldApps' if needed; now that the new result is delivered we |
| 280 | // know that it is no longer in use. |
| 281 | if (oldApps != null) { |
| 282 | onReleaseResources(oldApps); |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * Handles a request to start the Loader. |
| 288 | */ |
| 289 | @Override protected void onStartLoading() { |
| 290 | if (mApps != null) { |
| 291 | // If we currently have a result available, deliver it |
| 292 | // immediately. |
| 293 | deliverResult(mApps); |
| 294 | } |
| 295 | |
| 296 | // Start watching for changes in the app data. |
| 297 | if (mPackageObserver == null) { |
| 298 | mPackageObserver = new PackageIntentReceiver(this); |
| 299 | } |
| 300 | |
| 301 | // Has something interesting in the configuration changed since we |
| 302 | // last built the app list? |
| 303 | boolean configChange = mLastConfig.applyNewConfig(getContext().getResources()); |
| 304 | |
| 305 | if (takeContentChanged() || mApps == null || configChange) { |
| 306 | // If the data has changed since the last time it was loaded |
| 307 | // or is not currently available, start a load. |
| 308 | forceLoad(); |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * Handles a request to stop the Loader. |
| 314 | */ |
| 315 | @Override protected void onStopLoading() { |
| 316 | // Attempt to cancel the current load task if possible. |
| 317 | cancelLoad(); |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Handles a request to cancel a load. |
| 322 | */ |
| 323 | @Override public void onCanceled(List<AppEntry> apps) { |
| 324 | super.onCanceled(apps); |
| 325 | |
| 326 | // At this point we can release the resources associated with 'apps' |
| 327 | // if needed. |
| 328 | onReleaseResources(apps); |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * Handles a request to completely reset the Loader. |
| 333 | */ |
| 334 | @Override protected void onReset() { |
| 335 | super.onReset(); |
| 336 | |
| 337 | // Ensure the loader is stopped |
| 338 | onStopLoading(); |
| 339 | |
| 340 | // At this point we can release the resources associated with 'apps' |
| 341 | // if needed. |
| 342 | if (mApps != null) { |
| 343 | onReleaseResources(mApps); |
| 344 | mApps = null; |
| 345 | } |
| 346 | |
| 347 | // Stop monitoring for changes. |
| 348 | if (mPackageObserver != null) { |
| 349 | getContext().unregisterReceiver(mPackageObserver); |
| 350 | mPackageObserver = null; |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * Helper function to take care of releasing resources associated |
| 356 | * with an actively loaded data set. |
| 357 | */ |
| 358 | protected void onReleaseResources(List<AppEntry> apps) { |
| 359 | // For a simple List<> there is nothing to do. For something |
| 360 | // like a Cursor, we would close it here. |
| 361 | } |
| 362 | } |
| 363 | //END_INCLUDE(loader) |
| 364 | |
| 365 | //BEGIN_INCLUDE(fragment) |
| 366 | public static class AppListAdapter extends ArrayAdapter<AppEntry> { |
| 367 | private final LayoutInflater mInflater; |
| 368 | |
| 369 | public AppListAdapter(Context context) { |
| 370 | super(context, android.R.layout.simple_list_item_2); |
| 371 | mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| 372 | } |
| 373 | |
| 374 | public void setData(List<AppEntry> data) { |
| 375 | clear(); |
| 376 | if (data != null) { |
Svetoslav Ganov | 109979e | 2011-11-14 16:37:43 -0800 | [diff] [blame] | 377 | for (AppEntry appEntry : data) { |
| 378 | add(appEntry); |
| 379 | } |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 380 | } |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * Populate new items in the list. |
| 385 | */ |
| 386 | @Override public View getView(int position, View convertView, ViewGroup parent) { |
| 387 | View view; |
| 388 | |
| 389 | if (convertView == null) { |
| 390 | view = mInflater.inflate(R.layout.list_item_icon_text, parent, false); |
| 391 | } else { |
| 392 | view = convertView; |
| 393 | } |
| 394 | |
| 395 | AppEntry item = getItem(position); |
| 396 | ((ImageView)view.findViewById(R.id.icon)).setImageDrawable(item.getIcon()); |
| 397 | ((TextView)view.findViewById(R.id.text)).setText(item.getLabel()); |
| 398 | |
| 399 | return view; |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | public static class AppListFragment extends ListFragment |
Svetoslav Ganov | 109979e | 2011-11-14 16:37:43 -0800 | [diff] [blame] | 404 | implements LoaderManager.LoaderCallbacks<List<AppEntry>> { |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 405 | |
| 406 | // This is the Adapter being used to display the list's data. |
| 407 | AppListAdapter mAdapter; |
| 408 | |
| 409 | // If non-null, this is the current filter the user has provided. |
| 410 | String mCurFilter; |
| 411 | |
| 412 | @Override public void onActivityCreated(Bundle savedInstanceState) { |
| 413 | super.onActivityCreated(savedInstanceState); |
| 414 | |
| 415 | // Give some text to display if there is no data. In a real |
| 416 | // application this would come from a resource. |
| 417 | setEmptyText("No applications"); |
| 418 | |
| 419 | // We have a menu item to show in action bar. |
| 420 | setHasOptionsMenu(true); |
| 421 | |
| 422 | // Create an empty adapter we will use to display the loaded data. |
| 423 | mAdapter = new AppListAdapter(getActivity()); |
| 424 | setListAdapter(mAdapter); |
| 425 | |
| 426 | // Start out with a progress indicator. |
| 427 | setListShown(false); |
| 428 | |
| 429 | // Prepare the loader. Either re-connect with an existing one, |
| 430 | // or start a new one. |
| 431 | getLoaderManager().initLoader(0, null, this); |
| 432 | } |
| 433 | |
| 434 | @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { |
| 435 | // Place an action bar item for searching. |
| 436 | MenuItem item = menu.add("Search"); |
| 437 | item.setIcon(android.R.drawable.ic_menu_search); |
Aurimas Liutikas | 458543f | 2017-02-13 15:13:22 -0800 | [diff] [blame] | 438 | item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM |
| 439 | | MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW); |
Aurimas Liutikas | d353bdc | 2017-02-07 08:50:11 -0800 | [diff] [blame] | 440 | final SearchView searchView = new SearchView(getActivity()); |
| 441 | searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { |
| 442 | @Override |
| 443 | public boolean onQueryTextChange(String newText) { |
| 444 | // Called when the action bar search text has changed. Since this |
| 445 | // is a simple array adapter, we can just have it do the filtering. |
| 446 | mCurFilter = !TextUtils.isEmpty(newText) ? newText : null; |
| 447 | mAdapter.getFilter().filter(mCurFilter); |
| 448 | return true; |
| 449 | } |
Aurimas Liutikas | 9c76e95 | 2016-08-24 17:12:11 -0700 | [diff] [blame] | 450 | |
Aurimas Liutikas | d353bdc | 2017-02-07 08:50:11 -0800 | [diff] [blame] | 451 | @Override |
| 452 | public boolean onQueryTextSubmit(String query) { |
| 453 | return false; |
| 454 | } |
| 455 | }); |
| 456 | |
| 457 | searchView.setOnCloseListener(new SearchView.OnCloseListener() { |
| 458 | @Override |
| 459 | public boolean onClose() { |
| 460 | if (!TextUtils.isEmpty(searchView.getQuery())) { |
| 461 | searchView.setQuery(null, true); |
| 462 | } |
| 463 | return true; |
| 464 | } |
| 465 | }); |
| 466 | |
Aurimas Liutikas | 458543f | 2017-02-13 15:13:22 -0800 | [diff] [blame] | 467 | item.setActionView(searchView); |
Dianne Hackborn | aefd281 | 2011-06-13 13:48:13 -0700 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | @Override public void onListItemClick(ListView l, View v, int position, long id) { |
| 471 | // Insert desired behavior here. |
| 472 | Log.i("LoaderCustom", "Item clicked: " + id); |
| 473 | } |
| 474 | |
| 475 | @Override public Loader<List<AppEntry>> onCreateLoader(int id, Bundle args) { |
| 476 | // This is called when a new Loader needs to be created. This |
| 477 | // sample only has one Loader with no arguments, so it is simple. |
| 478 | return new AppListLoader(getActivity()); |
| 479 | } |
| 480 | |
| 481 | @Override public void onLoadFinished(Loader<List<AppEntry>> loader, List<AppEntry> data) { |
| 482 | // Set the new data in the adapter. |
| 483 | mAdapter.setData(data); |
| 484 | |
| 485 | // The list should now be shown. |
| 486 | if (isResumed()) { |
| 487 | setListShown(true); |
| 488 | } else { |
| 489 | setListShownNoAnimation(true); |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | @Override public void onLoaderReset(Loader<List<AppEntry>> loader) { |
| 494 | // Clear the data in the adapter. |
| 495 | mAdapter.setData(null); |
| 496 | } |
| 497 | } |
| 498 | //END_INCLUDE(fragment) |
| 499 | } |