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To create cool apps it is nessesary to get data from text fields, radio buttons and spinners. You also need to be able to create listeners for buttons and images.
An example of where you need to get text is a log in schema. Here the user will enter the email address and password. You will need to get this data from the user and process it.
When the user has entered the email address and password he or she will click on a button. A listener is needed to know that something will happen when this button is pressed.
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