Flutter app bar search widget
As an exercise I decided to reimplement my Buses app in flutter. To do this I need an open street map library, a beautiful soup library, a location library, an OS ref library, and a search widget. All of these are available in pub.dev, except a suitable search widget. All implementations of SearchBar in the docs include an annoying dropdown suggestions feature, which appears to be mandatory. However it is possible to take the SearchBar and include it in an AppBar, change the icons and end up with something which looks and acts very similarly to an android search widget.
Read more →Android Navigation Menu
Android versions from android 5 use a Toolbar as the ActionBar, but there appears to be no obvious API access. However, by traversing the view hierarchy, it can be found and used to set up app navigation. Create a recursive function to traverse the views and find the toolbar. // findToolbar private Toolbar findToolbar(ViewGroup group) { View result = null; final int count = group.getChildCount(); for (int i = 0; i < count; i++) { View view = group.
Read more →Update App Widget
Android app widgets normally can be set up to update periodically, but not repeatedly for a short period. For a bus times app I need the widget to update every 30 seconds for about 5 minutes. I already had a Service set up to update the widget from a suitable web site and using a Handler to reset the progress bar if the background update process failed. public static final int RESET_DELAY = 5 * 1000; public static final int REPEAT_DELAY = 30 * 1000; public static final int STOP_DELAY = 5 * 60 * 1000; private Handler handler; private boolean stopUpdate; // onCreate @Override public void onCreate() { // Get handler handler = new Handler(Looper.
Read more →Create a Word Grid
A popular online puzzle game involves solving a five character word grid in the least number of moves. There are probably several ways of algorithmically generating word grids, Donald Knuth’s Dancing Links paper mentions generating a word grid. I decided to use brute force and a randomised word list. This uses a large number of lists and iterators and can generate a large number of word grids. This algorithm is used in my Gridle android app.
Read more →Read Paywalled Newspaper Articles
Most mainstream newspapers show a teaser front page on their web site, but hide most of their content behind a paywall. As with most things you can think of, there is a browser extension for this – Bypass Paywalls. However this does not work for all newspapers, the extension appears to have dropped support for The Times, for example. It is still possible to read some articles by making use of a search engine to find another source for the text of the item.
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