AppBrain published statistics on library usage on Android. This list of libraries is very interesting and to me quite surprising. These stats are presented on three tabs: “Ad networks”, “Social SDKs” and “Development tools”. Here I care about development tools only. For example the two most-used libraries are those of the leading analytics providers, Google [...]
Archive for June, 2012
How Android’s AutoCompleteTextView Nearly Drove me Nuts
June 20th, 2012
2 Comments
AutoCompleteTextView is a nice widget Android provides. It helps the user enter text by presenting him possible selections based on what he has entered so far. Nicolas Klein has written a nice introduction of AutoCompleteTextView. As a short recap: You have to provide a ListAdapter that also must implement the Filterable interface. The filterable adapter [...]
Android’s ContentProviderOperation: “withBackReference” explained
June 15th, 2012
11 Comments
The class ContentProviderOperation.Builder has a method named withValueBackReference(String key, int previousResult). The API states ominously “Add a ContentValues back reference. A column value from the back references takes precedence over a value specified in withValues(ContentValues)”. Now, thank you, Google! That about explains everything! Android’s documentation is never short of surprises. A lot of stuff is [...]
Android Tutorial: Writing your own Content provider
June 12th, 2012
13 Comments
This is the last part of a three part tutorial on content providers. In the first part I covered the common concepts of content providers. In the second part I covered how to use content providers as a client. If you haven’t read the previous posts you might want to do so now. Implementing a [...]
Weird error message in Android’s MergeCursor
June 8th, 2012
No Comments
For an app I am working on I needed a MergeCursor to use search in a meaningful way. I needed to use two combine two cursors from different sources and I was going to merge them. The only major difference between the code for both cursors was the projection map I used to transform the [...]
Android: Getting Notified of Connectivity Changes
June 4th, 2012
4 Comments
In a previous posting I have explained how you can check the device’s current connectivity status. But this is only a temporary snapshot of the status. It might change anytime – and it probably will, given the volatility of a mobile environment. Thus you want to know whenever the connectivity state changes. Thankfully Android’s ConnectivityManager [...]
I'm Wolfram Rittmeyer, a software-developer from Germany.