Deck 12: Using an Existing App: Taking a Photo and Sending an Email

Question 1

An app can access another app.

Answer 1

True

Question 2

We can test whether the device has a given feature, such as a camera, by calling the hasSystemFeature method of the ____________ class, passing a constant of the class that corresponds to that feature.

Answer 2

PackageManager

Question 3

The argb, alpha, red, green, and blue methods of the Color class of the android.graphics package are all static methods.

Answer 3

True

Question 4

The alpha, red, green, and blue methods of the Color class of the android.graphics package all accept one parameter, an int representing a color.

Question 5

To access programmatically a resource named xyz.xml located in the drawable directory, we use the expression ____________.

Question 6

To set the current value of a seek bar to 0 inside an XML layout file, what attribute do we use?

A) android:current
B) android:value
C) android:progress
D) android:seek

Question 7

It is possible to write a method that takes a double parameter and returns that double with a maximum of three significant digits after the decimal point.

Question 8

It is possible for an app to store persistent data on a device.

Question 9

The fromFile static method of the Uri class takes a File parameter and returns a(n) ____________ reference.

Question 10

The createChooser static method of the Intent class returns an Intent reference such that when we start an activity with it, the user is presented with a choice of ____________ that match the Intent.

Question 11

The constant that we can pass to the hasSystemFeature to check whether the device includes a camera is ____________.

Question 12

After having started an Activity for an Intent by calling the ____________ method, we can access the results inside the onActivityResult method.

Question 13

The ____________ of the Bitmap class returns the integer representation of the color of the pixel at coordinate( x, y ) in the Bitmap.

Question 14

The ____________ of the Bitmap class sets the color of a point at some x and y coordinate in the Bitmap.

Question 15

The onStopTrackingTouch method of the SeekBar.OnSeekBarChangeListener interface is called when the user ____________ touching the seek bar.

Question 16

What constant do we pass to the Intent constructor to create an Intent to use a camera app?

A) MediaStore.IMAGE
B) MediaStore.IMAGE_CAPTURE
C) MediaStore.ACTION_IMAGE_CAPTURE
D) MediaStore.CAMERA

Question 17

What is the name of the class that encapsulates a slider?

A) Slider
B) SeekBar
C) Button
D) CheckBox

Question 18

What is the XML attribute that corresponds to the setMax method of the ProgressBar class?

A) android:max
B) max
C) android:maximum
D) android:setMax

Question 19

What is the value of the DIRECTORY_PICTURES constant of the Environment class?

A) Directory
B) Photos
C) Pictures
D) Directory_Pictures

Question 20

What is the data type of the only parameter of the setImageBitmap method of the ImageView class?

A) Bitmap
B) ImageBitmap
C) Image
D) ImageView

Question 21

It is not possible to add data in an Intent in the form of key/value pairs.

Question 22

The ImageView class can be used to display an image.

Question 23

The alpha, red, green, and blue methods of the Color class of the android.graphics package all return an int whose value is between 0 and 255.

Question 24

The constant that we can pass to the hasSystemFeature to check whether the device includes Bluetooth is __________________.

Question 25

The __________________ method of the Bitmap class returns the width of the Bitmap object.

Question 26

The __________________ method of the Bitmap class returns the height of the Bitmap.

Question 27

The onProgressChanged method of the SeekBar.OnSeekBarChangeListener interface is called __________________ as the user moves the seek bar.

Question 28

If we want to assign a unique name to a file, we can incorporate in the file name the time since the last boot in milliseconds, which we can get by calling the __________________ method of the SystemClock class.