Android Dialogs Ch 12

Front 1

What Dialog subclass will we use most often?

Back 1

AlertDialog

Front 2

What's the supposed problem with DatePickerDialog?

Back 2

a few bugs

Front 3

Benefit of wrapping AlertDialog in a DialogFragment as opposed to just using AlertDialog

Back 3

recommended procedure by Android

if you don't wrap in DialogFragment, dialog will vanish if device is rotated

Front 4

create a DialogFragment

Back 4

1. create a new fragment class that extends DialogFragment

2. public Dialog onCreateDialog(Bundle onSavedInstanceState){

return new AlertDialog.Builder(getActivity()).setTitle(R.string.date_picker_title) .setPositiveButton(android.R.string.ok, null).create();}

Front 5

Three general categories of buttons you can add to a dialog

Back 5

positive button

negative button

neutral button

Front 6

What two methods can you call to get a DialogFragment added to the FragmentManager and then put on screen?

Back 6

public void show(FragmentManager manager, String tag)

public void show(FragmentTransaction transaction, String tag)

Front 7

How do you add a DatePicker widget to an AlertDialog?

Back 7

public AlertDialog.Builder setView(View v)

Front 8

Example of adding DatePicker

Back 8

public Dialog onCreateDialog(Bundle onSavedInstanceState){ View v = getActivity().getLayoutInflater().inflate(R.layout.dialog_date, null); return new AlertDialog.Builder(getActivity()).setTitle(R.string.date_picker_title) .setView(v).setPositiveButton(android.R.string.ok, null).create();}

Front 9

How do you pass data between two fragments?

Back 9

create a newInstance(...) method and make the data and argument from the first fragment for the second fragment to use, and then add it as an extra on an Intent in onActivityResult(....)

Front 10

How do you initialize DatePicker?

Back 10

Use a Calendar object to get integers for day, month, year from a Date

Front 11

How do you track the relationship between two fragments in order to receive data back from a fragment?

Back 11

public void setTargetFragment(Fragment fragment, int requestCode);

then call getTargetFragment() and getTargetRequestCode() to get the data