SeekBar is similar to ProgressBar. The difference is that SeekBar has a slider that can be used by users to adjust the progress value manually. This example will show you how to use and customize the android SeekBar.
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This article will show you two examples. One is a Tab example which is implemented by an android selector and layer-list drawable object. The other is a shadow button implemented by layer-list.
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This example will show you how to use an android selector drawable resource to make a button to show different background colors in different button states(disable, pressed, unpressed).
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The android.graphics.drawable.LayerDrawable is a drawable object that manages arrays of other drawable objects in the desired order. Each drawable object in the layer list is drawn in the order of the list, and the last drawable object in the list is drawn at the top.
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Shape, selector, and layer-list are usually used to create custom drawable resources in android development. Those three XML elements can save a lot of UI resources and time if being used properly. This article will show you how to use them correctly.
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android.widget.ProgressBar is a sub-class of android.view.View. It is the parent class of both AbsSeekBar, RatingBar, SeekBar and ContentLoadingProgressBar. This article will introduce ProgressBar properties and how to customize ProgressBar for your needs.
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Android’s message queue and queue looper are aimed at the specific thread, a thread can have it’s own message queue and queue looper. 1. Android Message Queue And Looper Introduction. If you want to send messages between different threads, you need to add a message object in that thread’s message queue. Then the queue looper
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Android is a message-driven system, it implements the message loop mechanism through Looper and Handler. The message loop of Android is thread-oriented, each thread can have its own message queue and message loop.
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We often need to format numbers, such as taking two decimal places for a number, show only the integer part of a number, etc. Java provides java.text.DecimalFormat class, which can help you to format numbers use your specified pattern as quickly as possible.
Java DecimalFormat Example Read More »
android.os.Handler and android.os.AsyncTask classes all supports asynchronous task in android. To use Handler, you need to create a new child thread object for each task. When a task is finished, it will send a message to the main thread Handler to update UI components. But when multiple tasks are executed simultaneously, it is not easy
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