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The source code is released under:
GNU General Public License
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/** * Ace Shooting/* w ww . j av a 2 s. c o m*/ * * Copyright (c) 2014 Ace Shooting * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * */ package com.aceshooting.rssapp; import android.app.Activity; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.drawable.BitmapDrawable; import android.os.Handler; import android.util.TypedValue; import android.view.View; import android.widget.ResourceCursorAdapter; import android.widget.TextView; import com.aceshooting.rssapp.provider.FeedData; import java.text.DateFormat; import java.util.Date; import java.util.Vector; public class RSSOverviewListAdapter extends ResourceCursorAdapter { private static final String COUNT_UNREAD = "COUNT(*) - COUNT(readdate)"; private static final String COUNT = "COUNT(*)"; private String COLON; private int nameColumnPosition; private int lastUpdateColumn; private int idPosition; private int linkPosition; private int errorPosition; private int iconPosition; private Handler handler; private SimpleTask updateTask; private boolean feedSort; private Vector<View> sortViews; private DateFormat dateFormat; private DateFormat timeFormat; public RSSOverviewListAdapter(Activity activity) { super(activity, R.layout.feedlistitem, activity.managedQuery(FeedData.FeedColumns.CONTENT_URI, null, null, null, null)); nameColumnPosition = getCursor().getColumnIndex(FeedData.FeedColumns.NAME); lastUpdateColumn = getCursor().getColumnIndex(FeedData.FeedColumns.LASTUPDATE); idPosition = getCursor().getColumnIndex(FeedData.FeedColumns._ID); linkPosition = getCursor().getColumnIndex(FeedData.FeedColumns.URL); errorPosition = getCursor().getColumnIndex(FeedData.FeedColumns.ERROR); iconPosition = getCursor().getColumnIndex(FeedData.FeedColumns.ICON); COLON = activity.getString(R.string.colon); handler = new Handler(); updateTask = new SimpleTask() { @Override public void runControlled() { RSSOverviewListAdapter.super.onContentChanged(); cancel(); // cancel the task such that it does not run more than once without explicit intention } @Override public void postRun() { if (getPostCount() > 1) { // enforce second run even if task is canceled handler.postDelayed(updateTask, 1500); } } }; sortViews = new Vector<View>(); dateFormat = android.text.format.DateFormat.getDateFormat(activity); timeFormat = android.text.format.DateFormat.getTimeFormat(activity); } @Override public void bindView(View view, Context context, Cursor cursor) { TextView textView = ((TextView) view.findViewById(android.R.id.text1)); textView.setSingleLine(); Cursor countCursor = context.getContentResolver().query(FeedData.EntryColumns.CONTENT_URI(cursor.getString(idPosition)), new String[] {COUNT_UNREAD, COUNT}, null, null, null); countCursor.moveToFirst(); int unreadCount = countCursor.getInt(0); int count = countCursor.getInt(1); countCursor.close(); long timestamp = cursor.getLong(lastUpdateColumn); TextView updateTextView = ((TextView) view.findViewById(android.R.id.text2));; if (cursor.isNull(errorPosition)) { Date date = new Date(timestamp); updateTextView.setText(new StringBuilder(context.getString(R.string.update)).append(COLON).append(timestamp == 0 ? context.getString(R.string.never) : new StringBuilder(dateFormat.format(date)).append(' ').append(timeFormat.format(date)).append(Strings.COMMASPACE).append(unreadCount).append('/').append(count).append(' ').append(context.getString(R.string.unread)))); } else { updateTextView.setText(new StringBuilder(context.getString(R.string.error)).append(COLON).append(cursor.getString(errorPosition))); } textView.setEnabled(unreadCount > 0); byte[] iconBytes = cursor.getBlob(iconPosition); if (iconBytes != null && iconBytes.length > 0) { Bitmap bitmap = BitmapFactory.decodeByteArray(iconBytes, 0, iconBytes.length); if (bitmap != null && bitmap.getHeight() > 0 && bitmap.getWidth() > 0) { int bitmapSizeInDip = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 18f, context.getResources().getDisplayMetrics()); if (bitmap.getHeight() != bitmapSizeInDip) { bitmap = Bitmap.createScaledBitmap(bitmap, bitmapSizeInDip, bitmapSizeInDip, false); } textView.setCompoundDrawablesWithIntrinsicBounds(new BitmapDrawable(bitmap), null, null, null); textView.setText(" " + (cursor.isNull(nameColumnPosition) ? cursor.getString(linkPosition) : cursor.getString(nameColumnPosition))); } else { textView.setCompoundDrawablesWithIntrinsicBounds(null, null, null, null); textView.setText(cursor.isNull(nameColumnPosition) ? cursor.getString(linkPosition) : cursor.getString(nameColumnPosition)); } } else { view.setTag(null); textView.setCompoundDrawablesWithIntrinsicBounds(null, null, null, null); textView.setText(cursor.isNull(nameColumnPosition) ? cursor.getString(linkPosition) : cursor.getString(nameColumnPosition)); } View sortView = view.findViewById(R.id.sortitem); if (!sortViews.contains(sortView)) { // as we are reusing views, this is fine sortViews.add(sortView); } sortView.setVisibility(feedSort ? View.VISIBLE : View.GONE); } @Override protected synchronized void onContentChanged() { /* * we delay the second(!) content change by 1.5 second such that it gets called at most once per 1.5 seconds * to take stress away from the UI and avoid not needed updates */ if (!updateTask.isPosted()) { super.onContentChanged(); updateTask.post(2); // we post 2 tasks handler.postDelayed(updateTask, 1500); // waits one second until the task gets unposted updateTask.cancel(); // put the canceled task in the queue to enable it again optionally } else { if (updateTask.getPostCount() < 2) { updateTask.post(); // enables the task and adds a new one } else { updateTask.enable(); } } } public void setFeedSortEnabled(boolean enabled) { feedSort = enabled; /* we do not want to call notifyDataSetChanged as this requeries the cursor*/ int visibility = feedSort ? View.VISIBLE : View.GONE; for (View sortView : sortViews) { sortView.setVisibility(visibility); } } }