This example will show you how to change the android device screen brightness programmatically. You can only see the effect with this example on a real physical android device, if you run it in an android emulator, it will not take effect.
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When you write an android app, you sometimes may need to change system settings. For example, change the android device screen brightness. But such action needs your app to have android.permission.WRITE_SETTINGS permission, otherwise you may encounter the exception with the message java.lang.SecurityException: com.dev2qa.example was not granted this permission: android.permission.WRITE_SETTINGS.
How To Grant Write Settings Permission In Android Read More »
This example will show you how to dynamically register/unregister broadcast receivers in android activity. You can read the article Android Broadcast Overview to learn basic concepts about android broadcast if you need.
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Android applications use broadcasts to communicate with each other. Broadcasts can be sent by either the android system or other applications. Each android application can register it’s interesting broadcast, then it will only receive the interested broadcasts that have been registered.
Android Broadcast Overview Read More »
FlexboxLayout is a google open source project. It’s aimed to implement a CSS3 Flexbox style sheet which is used to define a scalable box model layout.
Android Flexbox Layout Example Read More »
There are a lot of android devices with different screen sizes and resolutions. This article will tell you how to make an android program load layout files dynamically based on the device’s screen resolution or size at run time.
How To Support Multiple Screen Size In Android Read More »
Fragment can has it’s own menu, the fragment menu items are also displayed in android application action bar. This article will show you how to add menu items in android fragment and how to use fragment menu items with activity menu items.
Android Fragment Menu Example Read More »
The android activity provides a method to save/retrieve instance state data. Please read the article Android Save Retrieve Activity Instance State Example to learn more. The fragment also provides a method for you to save/retrieve related instance state data. This article will show you an example of how to save/retrieve instance state data in android
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Android OS provides a back stack function for Activity, it also provides the back stack function for Fragment. If you add one Fragment into the back stack, when you press the android device back menu, you can find the Fragment that is saved in the back stack popup. Until all the saved Fragments in the
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The fragment is widely used in android app development. You can use it statically or dynamically. Article Android Multiple Fragments In One Activity Example has introduced what it is and how to use Fragment statically. This article will tell you how to use it dynamically in your android app.
Android Add Fragment To Activity Dynamically Example Read More »