android.text.style.ReplacementSpan class is a supper span class that you can extend to create your customized span class. You can draw anything as you want in your custom span class, and then use it to replace the specified characters in your textview string.
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The android class android.graphics.Color provides some color constants which can be used directly in an android application. For example, BLACK, WHITE, RED, GREEN, BLUE, YELLOW, CYAN, MAGENTA, GRAY, LTGRAY (light gray), DKGRAY (dark gray). But you may find that it is not enough, sometimes you need more colors. So this article will show you how
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android.view.View component acts like JPanel in Swing programming. It’s just a rectangular blank area, the android.view.View component doesn’t have any content. For built-in UI components of Android applications, they all inherit the class android.view.Viewand then render the appearance on the blank areas provided by the View component.
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Android applications can be executing or debugging in either virtual device or real device. But it can be executed or debugged in only one device at the same time. This article will show you how to do that.
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Before debugging and testing the android application, you should create an android virtual device ( AVD ) to start a simulator. You can specify special configurations for your AVD, and then start it for debugging and executing applications.
How To Create Android Virtual Device (AVD) In Android Studio Read More »
Activity is a very important component in android application development. It represents a screen which is used to interact with phone user. Commonly there are three important files for creating and use an activity: an XML layout file, a java class file, and AndroidManifest.xml.
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This article will show you how to Open, Close, or Save android studio projects. It will also show you how to browse the project folder or file’s physical hard disk directory in android studio.
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When developing an android application, you always need to add images to it. This article will show you how to add images to your android application, there is also an example that will show you how to load and use the added images in the android application.
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R.java is very important in android application development. It is used to identify all resource data such as id, layout, image, drawable resource, etc. R.java is generated by android studio automatically. But it is sometimes confused for developers to use it. This article will help you to resolve these problems about R.java you may encounter.
How To Resolve Package R Dose Not Exist Error In Android Studio Read More »
This article will introduce basic user group and file permission concepts and operation commands in Linux. Wish can help you in code development.
Linux User Group And File Permission Introduction Read More »