Example usage for android.app LoaderManager restartLoader

Introduction

In this page you can find the example usage for android.app LoaderManager restartLoader.

Prototype

public abstract <D> Loader<D> restartLoader(int id, Bundle args, LoaderManager.LoaderCallbacks<D> callback);

Source Link

Document

Starts a new or restarts an existing android.content.Loader in this manager, registers the callbacks to it, and (if the activity/fragment is currently started) starts loading it.

Usage

From source file:com.tct.mail.ui.AbstractActivityController.java

/**
 * Sets the current folder if it is different from the object provided here. This method does
 * NOT notify the folder observers that a change has happened. Observers are notified when we
 * get an updated folder from the loaders, which will happen as a consequence of this method
 * (since this method starts/restarts the loaders).
 * @param folder The folder to assign//from  ww w.j ava2s .  c  o m
 */
private void updateFolder(Folder folder) {
    if (folder == null || !folder.isInitialized()) {
        LogUtils.e(LOG_TAG, new Error(), "AAC.setFolder(%s): Bad input", folder);
        return;
    }
    if (folder.equals(mFolder)) {
        LogUtils.d(LOG_TAG, "AAC.setFolder(%s): Input matches mFolder", folder);
        return;
    }
    final boolean wasNull = mFolder == null;
    LogUtils.d(LOG_TAG, "AbstractActivityController.setFolder(%s)", folder.name);
    final LoaderManager lm = mActivity.getLoaderManager();
    // updateFolder is called from AAC.onLoadFinished() on folder changes.  We need to
    // ensure that the folder is different from the previous folder before marking the
    // folder changed.
    setHasFolderChanged(folder);
    mFolder = folder;

    // We do not need to notify folder observers yet. Instead we start the loaders and
    // when the load finishes, we will get an updated folder. Then, we notify the
    // folderObservers in onLoadFinished.
    mActionBarController.setFolder(mFolder);
    //TS: junwei-xu 2015-09-02 EMAIL BUGFIX-546917 ADD-S
    mActivity.invalidateOptionsMenu();
    //TS: junwei-xu 2015-09-02 EMAIL BUGFIX-546917 ADD-E

    // Only when we switch from one folder to another do we want to restart the
    // folder and conversation list loaders (to trigger onCreateLoader).
    // The first time this runs when the activity is [re-]initialized, we want to re-use the
    // previous loader's instance and data upon configuration change (e.g. rotation).
    // If there was not already an instance of the loader, init it.
    if (lm.getLoader(LOADER_FOLDER_CURSOR) == null) {
        lm.initLoader(LOADER_FOLDER_CURSOR, Bundle.EMPTY, mFolderCallbacks);
    } else {
        lm.restartLoader(LOADER_FOLDER_CURSOR, Bundle.EMPTY, mFolderCallbacks);
    }
    if (!wasNull && lm.getLoader(LOADER_CONVERSATION_LIST) != null) {
        // If there was an existing folder AND we have changed
        // folders, we want to restart the loader to get the information
        // for the newly selected folder
        lm.destroyLoader(LOADER_CONVERSATION_LIST);
    }
    /// TCT: Fix the empty view will always flash out here. no need show empty view when folde changing,
    // folders, we want to restart the loader to get the information    /// cause loadConversationListData would always destroy loader,and the cursor always be empty when do this. @{
    // for the newly selected folder
    final ConversationListFragment conversationList = getConversationListFragment();
    // TS: zheng.zou 2015-05-8 EMAIL BUGFIX-976970 DEL_S
    //        lm.destroyLoader(LOADER_CONVERSATION_LIST);
    // TS: zheng.zou 2015-05-8 EMAIL BUGFIX-976970 DEL_E
    if (conversationList != null) {
        conversationList.getListView().setEmptyView(null);
    }
    loadConversationListData(true);
}