最新なGoogle Associate-Android-Developer問題集（125題）、真実試験の問題を全部にカバー！

質問 1：
Once your test has obtained a UiObject object, you can call the methods in the UiObject class to perform user interactions on the UI component represented by that object. You can specify such actions as: (Choose four.)
A. dragTo() : Drags this object to arbitrary coordinates.
B. setText() : Sets the text in an editable field, after clearing the field's content. Conversely, the clearTextField() method clears the existing text in an editable field.
C. touch() : Touch the center of the visible bounds of the UI element.
D. moveTo() : Move this object to arbitrary coordinates.
E. click() : Clicks the center of the visible bounds of the UI element.
F. swipeUp() : Performs the swipe up action on the UiObject. Similarly, the swipeDown(), swipeLeft(), and swipeRight() methods perform corresponding actions.
正解：A,B,E,F

質問 2：
With a room database. When performing queries, you'll often want your app's UI to update automatically when the data changes. Can you use a return value of type LiveData in your query method description to achieve this?
A. No
B. Yes
正解：B
解説: (Pass4Test メンバーにのみ表示されます)

質問 3：
In our TeaViewModel class, that extends ViewModel, we have such prorerty:
val tea: LiveData<Tea>
An observer in our Activity (type of mViewModel variable in example is TeaViewModel) is set in this way:
mViewModel!!.tea.observe(this, Observer { tea: Tea? -> displayTea(tea) }) What will be a correct displayTea method definition?
A. private fun displayTea(tea: LiveData?<Tea>)
B. private fun displayTea()
C. private fun displayTea(tea: LiveData?<T>)
D. private fun displayTea(tea: Tea?)
正解：D

質問 4：
For example, our preferences.xml file was added by addPreferencesFromResource (R.xml.preferences). Our preferences.xml file contains such item:
<SwitchPreference android:id="@+id/notification" android:key="@string/pref_notification_key" android:title="@string/pref_notification_title" android:summary="@string/pref_notification_summary" android:defaultValue="@bool/pref_notification_default_value" app:iconSpaceReserved="false"/> In our Fragment, we can dynamically get current notification preference value in this way:
A. boolean isNotificationOn = PreferenceManager.getSharedPreferences(getContext ()).getBoolean( getContext().getResources().getBoolean(R.bool.pref_notification_default_value), getContext().getString(R.string.pref_notification_key) );
B. boolean isNotificationOn = PreferenceManager.getDefaultSharedPreferences(getContext ()).getBoolean( getContext().getString(R.string.pref_notification_key), getContext().getResources().getBoolean(R.bool.pref_notification_default_value) );
C. boolean isNotificationOn = PreferenceManager.getSharedPreferences(getContext ()).getBoolean( getContext().getString(R.string.pref_notification_default_value), getContext().getString(R.string.pref_notification_key) );
正解：B

質問 5：
To run a debuggable build variant you must use a build variant that includes
A. minifyEnabled false in the build configuration
B. debuggable true in the build configuration
C. debuggable true or debuggable false in the build configuration
正解：B

質問 6：
To run your local unit tests, follow these steps:
1. Be sure your project is synchronized with Gradle by clicking Sync Project in the toolbar.
2. Run your test in one of the following ways (select possible): (Choose three.)
A. To test all methods in a class, right-click a class or method in the test file and click Run .
B. To run a single test, open the Project window, and then right-click a test and click Run .
C. To run all tests in Project, open the Project window, and then right-click a test and click Run .
D. To run all tests in a directory, right-click on the directory and select Run tests .
正解：A,B,D

質問 7：
The easiest way of adding menu items (to specify the options menu for an activity) is inflating an XML file into the Menu via MenuInflater. With menu_main.xml we can do it in this way:
A. @Override
public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return true;
}
B. @Override
public boolean onOptionsItemSelected(MenuItem item) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return super.onOptionsItemSelected(item);
}
C. @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.menu.menu_main);
}
正解：A
解説: (Pass4Test メンバーにのみ表示されます)