我正在开发一个启动器应用程序，目前我将此启动器作为外部库包含在内。
启动器适用于Android API级别16-23。我测试了三星手机的每个Android API级别的启动器，21的阿尔卡特和21到23的nexus。我在平板电脑（联想和三星）上进行了测试，它运行良好。
虽然在摩托罗拉手机上发射器未能安装，但它会出现错误'appWidgetProvider'不存在。如果我尝试使用低于API级别19的nexus创建模拟器，则会出现相同的错误。
我的问题是为什么会发生这种情况，我该怎么做才能解决它？
（我想到的第一件事是我目前没有找到在摩托罗拉的主屏幕上添加小部件的选项，所以它不存在。在这种情况下，什么是最好的方法测试并禁用它。
logcat的
04-06 05:41:51.383 1915-1929/com.arlind.catapulttesting2 E/AndroidRuntime: FATAL EXCEPTION: launcher-loader
Process: com.arlind.catapulttesting2, PID: 1915
java.lang.IllegalArgumentException: column 'appWidgetProvider' does not exist
at android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java:303)
at android.database.CursorWrapper.getColumnIndexOrThrow(CursorWrapper.java:78)
at com.android.launcher3.LauncherModel$LoaderTask.loadWorkspace(LauncherModel.java:2146)
at com.android.launcher3.LauncherModel$LoaderTask.loadAndBindWorkspace(LauncherModel.java:1646)
at com.android.launcher3.LauncherModel$LoaderTask.run(LauncherModel.java:1751)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.os.HandlerThread.run(HandlerThread.java:61)
04-06 05:41:51.393 1252-1464/system_process W/ActivityManager:
Force finishing activity com.arlind.catapulttesting2/com.android.launcher3.Launcher
发生的应用程序部分
private boolean loadWorkspace() {
// Log to disk
Launcher.addDumpLog(TAG, "11683562 - loadWorkspace()", true);
final long t = DEBUG_LOADERS ? SystemClock.uptimeMillis() : 0;
final Context context = mContext;
final ContentResolver contentResolver = context.getContentResolver();
final PackageManager manager = context.getPackageManager();
final AppWidgetManager widgets = AppWidgetManager.getInstance(context);
final boolean isSafeMode = manager.isSafeMode();
final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(context);
final boolean isSdCardReady = context.registerReceiver(null,
new IntentFilter(StartupReceiver.SYSTEM_READY)) != null;
LauncherAppState app = LauncherAppState.getInstance();
DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
int countX = (int) grid.numColumns;
int countY = (int) grid.numRows;
boolean shouldResize = ((mFlags & LOADER_FLAG_RESIZE_GRID) != 0);
if ((mFlags & LOADER_FLAG_CLEAR_WORKSPACE) != 0) {
Launcher.addDumpLog(TAG, "loadWorkspace: resetting launcher database", true);
LauncherAppState.getLauncherProvider().deleteDatabase();
}
if ((mFlags & LOADER_FLAG_MIGRATE_SHORTCUTS) != 0) {
// append the user's Launcher2 shortcuts
Launcher.addDumpLog(TAG, "loadWorkspace: migrating from launcher2", true);
LauncherAppState.getLauncherProvider().migrateLauncher2Shortcuts();
} else {
// Make sure the default workspace is loaded
Launcher.addDumpLog(TAG, "loadWorkspace: loading default favorites", false);
LauncherAppState.getLauncherProvider().loadDefaultFavoritesIfNecessary();
}
// This code path is for our old migration code and should no longer be exercised
boolean loadedOldDb = false;
// Log to disk
Launcher.addDumpLog(TAG, "11683562 - loadedOldDb: " + loadedOldDb, true);
synchronized (sBgLock) {
clearSBgDataStructures();
final HashSet<String> installingPkgs = PackageInstallerCompat
.getInstance(mContext).updateAndGetActiveSessionCache();
final ArrayList<Long> itemsToRemove = new ArrayList<Long>();
final ArrayList<Long> restoredRows = new ArrayList<Long>();
final Uri contentUri = LauncherSettings.Favorites.getContentUri(false,context);
if (DEBUG_LOADERS) Log.d(TAG, "loading model from " + contentUri);
final Cursor c = contentResolver.query(contentUri, null, null, null, null);
// +1 for the hotseat (it can be larger than the workspace)
// Load workspace in reverse order to ensure that latest items are loaded first (and
// before any earlier duplicates)
final HashMap<Long, ItemInfo[][]> occupied = new HashMap<Long, ItemInfo[][]>();
try {
final int idIndex = c.getColumnIndexOrThrow(LauncherSettings.Favorites._ID);
final int intentIndex = c.getColumnIndexOrThrow
(LauncherSettings.Favorites.INTENT);
final int titleIndex = c.getColumnIndexOrThrow
(LauncherSettings.Favorites.TITLE);
final int iconTypeIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.ICON_TYPE);
final int iconIndex = c.getColumnIndexOrThrow(LauncherSettings.Favorites.ICON);
final int iconPackageIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.ICON_PACKAGE);
final int iconResourceIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.ICON_RESOURCE);
final int containerIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.CONTAINER);
final int itemTypeIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.ITEM_TYPE);
final int appWidgetIdIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.APPWIDGET_ID);
final int appWidgetProviderIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.APPWIDGET_PROVIDER);
final int screenIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.SCREEN);
final int cellXIndex = c.getColumnIndexOrThrow
(LauncherSettings.Favorites.CELLX);
final int cellYIndex = c.getColumnIndexOrThrow
(LauncherSettings.Favorites.CELLY);
final int spanXIndex = c.getColumnIndexOrThrow
(LauncherSettings.Favorites.SPANX);
final int spanYIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.SPANY);
final int restoredIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.RESTORED);
final int profileIdIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.PROFILE_ID);
//final int uriIndex = c.getColumnIndexOrThrow(LauncherSettings.Favorites.URI);
//final int displayModeIndex = c.getColumnIndexOrThrow(
final int hiddenIndex = c.getColumnIndexOrThrow(
LauncherSettings.Favorites.HIDDEN);
//final int uriIndex = c.getColumnIndexOrThrow(LauncherSettings.Favorites.URI);
//final int displayModeIndex = c.getColumnIndexOrThrow(
// LauncherSettings.Favorites.DISPLAY_MODE);
ShortcutInfo info;
String intentDescription;
LauncherAppWidgetInfo appWidgetInfo;
int container;
long id;
Intent intent;
UserHandleCompat user;