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Question
You can create a customview by extending class ________ or one of its subclasses.Answer
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When a View needs to be redrawn, its onDraw method is called. The first argument is the Bitmap to draw, the next two arguments are the x-y coordinates where the upper-left corner of the Bitmap should be placed on the View and the last argument is the ________ object that specifies the drawing characteristics.
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(True/False) You set a line's width using Paint's setLineWidth method.
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You register to receive accelerometer events using SensorManager's registerListener method. One of its arguments is the rate at which sensor events should be delivered to the app. Why would you specify SENSOR_DELAY_NORMAL to receive sensor events at the default rate, instead of choosing a faster rate?
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(True/False) Like an Activity, a Fragment can place items in the app's action bar and options menu. To do so, the Fragment must call its setHasOptionsMenu method with the argument true.
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(True/False) A GestureDetector allows an app to react to user interactions such as flings, single taps, double taps, long presses and scrolls by implementing the methods of interfaces GestureDetector.OnGestureListener and Gesture-Detector.On-Double-Tap-Listener interfaces.
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You use the type of a ________ to determine whether the user has touched the screen, dragged across the screen or lifted a finger from the screen.
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(True/False) You process touch events by overriding the View method on Touch Event.
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The last Fragment lifecycle method called when a Fragment is about to be detached from a parent Activity is ________.
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(True/False) A FrameLayout is designed to display many Views.
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(True/False) The DialogFragment's onCreateDialog method uses an ________ to configure and create an AlertDialog, then returns it.
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(True/False) Activity is an indirect subclass of Context.
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We use the WindowManager to get a Display object that contains the screen's current width and height, which changes based on the ________.
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(True/False) You typically provide images and other visual resources in the highest available resolution so Android can scale each appropriately for each particular device's pixel density.
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(True/False) Unlike an app's drawable folders, which require their image contents to be at the root level in each folder, the assets folder may contain files of any type and they can be organized in subfolders.
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An Intent includes a Bundle of ________additional information that's passed to the Activity that handles the Intent. For example, an e-mail Activity can receive the e-mail's subject, CC and BCC addresses, and the body text.
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When you create an app project, the IDE generates ________ as a subclass of Activity and provided the shell of an overridden onCreate method, which every Activity subclass must override.