package com.hanju.video.app.ui.recent;
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import java.io.FileDescriptor;
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import java.io.PrintWriter;
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import android.content.Context;
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import android.database.Cursor;
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import androidx.loader.content.AsyncTaskLoader;
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import com.mozillaonline.providers.DownloadManager;
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import com.mozillaonline.providers.downloads.Downloads;
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public class DownloadCursorLoader extends AsyncTaskLoader<Cursor> {
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final ForceLoadContentObserver mObserver;
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private DownloadManager mDownloadManager;
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Cursor mCursor;
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public DownloadCursorLoader(Context context, DownloadManager downloadManager) {
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super(context);
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mObserver = new ForceLoadContentObserver();
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mDownloadManager = downloadManager;
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}
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/* Runs on a worker thread */
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@Override
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public Cursor loadInBackground() {
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DownloadManager.Query baseQuery = new DownloadManager.Query()
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.setOnlyIncludeVisibleInDownloadsUi(true)
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.orderBy(DownloadManager.COLUMN_LAST_MODIFIED_TIMESTAMP, DownloadManager.Query.ORDER_DESCENDING);
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Cursor cursor = this.mDownloadManager.query(baseQuery);
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if (cursor != null) {
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// Ensure the cursor window is filled
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cursor.getCount();
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cursor.setNotificationUri(getContext().getContentResolver(), Downloads.CONTENT_URI);
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cursor.registerContentObserver(mObserver);
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}
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return cursor;
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}
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/* Runs on the UI thread */
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@Override
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public void deliverResult(Cursor cursor) {
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if (isReset()) {
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// An async query came in while the loader is stopped
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if (cursor != null) {
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cursor.close();
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}
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return;
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}
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Cursor oldCursor = mCursor;
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mCursor = cursor;
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if (isStarted()) {
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super.deliverResult(cursor);
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}
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if (oldCursor != null && oldCursor != cursor && !oldCursor.isClosed()) {
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oldCursor.close();
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}
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}
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/**
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* Starts an asynchronous load of the contacts list data. When the result is ready the callbacks
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* will be called on the UI thread. If a previous load has been completed and is still valid
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* the result may be passed to the callbacks immediately.
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*
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* Must be called from the UI thread
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*/
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@Override
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protected void onStartLoading() {
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if (mCursor != null) {
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deliverResult(mCursor);
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}
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if (takeContentChanged() || mCursor == null) {
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forceLoad();
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}
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}
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/**
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* Must be called from the UI thread
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*/
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@Override
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protected void onStopLoading() {
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// Attempt to cancel the current load task if possible.
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cancelLoad();
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}
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@Override
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public void onCanceled(Cursor cursor) {
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if (cursor != null && !cursor.isClosed()) {
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cursor.close();
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}
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}
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@Override
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protected void onReset() {
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super.onReset();
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// Ensure the loader is stopped
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onStopLoading();
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if (mCursor != null && !mCursor.isClosed()) {
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mCursor.close();
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}
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mCursor = null;
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}
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@Override
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public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
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super.dump(prefix, fd, writer, args);
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writer.print(prefix); writer.print("mCursor="); writer.println(mCursor);
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}
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}
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