Android validating a url

The following exercise demonstrates the usage of intents to start a sub-activities and how exchange data between them.It assume that you are either capable of creating activities or that you have finished the exercise described in If you send such an intent to your system, the Android system determines all registered Android components for this intent.If several components have registered for this intent, the user can select which one should be used.In this component you select a photo and return to your application to use the selected photo.Explicit intents explicitly define the component which should be called by the Android system, by using the Java class as identifier. Android studio installs the app on your AVD and starts it and if everything is fine with your setup and application, it will display following Emulator window − Type anything in the username and password field, and then press the login button.

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Introduction In this article you will learn how to validate edit text in Android.You can register your Android components via intent filters for certain events.If a component does not define one, it can only be called by explicit intents.If only one component is found, Android starts this component directly.If several components are identified by the Android system, the user will get a selection dialog and can decide which component should be used for the intent.

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