The Android ProgressBar is a useful UI component that most developers will quickly find need of. Displaying progress, even an indeterminate “loading” indicator, provides crucial feedback to a user, eliminating frustration and confusion while your app is churning away in the background.
Today I’ll demonstrate using an indeterminate ProgressBar within a ListView while loading web content. I’ll be modifying the TweetView project from my previous post.
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Last week I demonstrated designing and implementing customized layouts for Android ListView items, including some simple example code. Today i’ll expand on that code to make something a little closer to an actual app: a Twitter feed reader for Android. I’ll use this exercise to illustrate some new tools and concepts in the process such as working with JSON data and the Android BitmapFactory.
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Today I’m going to go step by step through an example of using a ListView, and customizing the visual layout of items within.
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