Google Associate Android Developer Google Developers Certification – Associate Android Developer (Kotlin and Java Exam) Online Training
Google Associate Android Developer Online Training
The questions for Associate Android Developer were last updated at Feb 10,2025.
- Exam Code: Associate Android Developer
- Exam Name: Google Developers Certification - Associate Android Developer (Kotlin and Java Exam)
- Certification Provider: Google
- Latest update: Feb 10,2025
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 . val isNotificationOn = PreferenceManager.getDefaultSharedPreferences (context).getBoolean( context!!.getString(R.string.pref_notification_key), context!!.resources.getBoolean(R.bool.pref_notification_default_value)
) - B . val isNotificationOn = PreferenceManager.getSharedPreferences (context).getBoolean( context!!.getString(R.string.pref_notification_default_value), context!!.getString(R.string.pref_notification_key),
) - C . val isNotificationOn = PreferenceManager.getSharedPreferences (context).getBoolean( context!!.resources.getBoolean(R.bool.pref_notification_default_value), context!!.getString(R.string.pref_notification_key)
)
For example, our preferences.xml file was added by addPreferencesFromResource (R.xml.preferences).
Our preferences.xml file contains such item:
<ListPreference android:id="@+id/order_by" android:key="@string/pref_sort_key"
android:title="@string/pref_sort_title" android:summary="@string/pref_sort_summary"
android:dialogTitle="@string/pref_sort_dialog_title" android:entries="@array/sort_oder"
android:entryValues="@array/sort_oder_value"
android:defaultValue="@string/pref_default_sort_value" app:iconSpaceReserved="false" />
In our Fragment, we can dynamically get current notification preference value in this way:
- A . val sortBy = PreferenceManager.getDefaultSharedPreferences(context).getString( context!!.getString(R.string.pref_sort_key), context!!.resources.getBoolean(R.bool.pref_default_sort_value)
) - B . val sortBy = PreferenceManager.getSharedPreferences(context).getString( context!!.getString(R.string.pref_default_sort_value), context!!.getString(R.string.pref_sort_key),
) - C . val sortBy = PreferenceManager.getSharedPreferences(context).getBoolean( context!!.resources.getBoolean(R.bool.pref_default_sort_value), context!!.getString(R.string.pref_sort_key)
) - D . val sortBy = PreferenceManager.getDefaultSharedPreferences(context).getString( context!!.getString(R.string.pref_sort_key), context!!.getString(R.string.pref_default_sort_value)
)
For example, we have a file in our raw folder app/src/main/res/raw/sample_teas.json.
To get an InputStream for reading it, from out Context context, we can do this:
- A . val input = context!!.openRawResource(R.raw.sample_teas)
- B . val input = context!!.getRawResource(R.raw.sample_teas)
- C . val input = context!!.resources.openRawResource(R.raw.sample_teas)
For example, we have a BufferedReader reader, associated with the json file through InputStreamReader.
To get a file data we can do this:
- A . var line: String? try {
while (reader.readLine().also { line = it } != null) { builder.append(line)
}
val json = JSONObject(builder.toString())
return json
} catch (exception: IOException) { exception.printStackTrace()
} catch (exception: JSONException) { exception.printStackTrace()
} - B . var line: JSONObject ? try {
while (reader.readJSONObject ().also { line = it } != null) {
builder.append(line)
}
val json = JSONObject(builder.toString())
return json
} catch (exception: IOException) { exception.printStackTrace()
} catch (exception: JSONException) { exception.printStackTrace()
} - C . var line: String? try {
while (reader.readLine().also { line = it } != null) { builder.append(line)
}
val json = JSONObject(builder.toString()) return json
} catch (exception: RuntimeException) {
exception.printStackTrace()
} catch (exception: ArrayIndexOutOfBoundsException) { exception.printStackTrace()
}
For example, we have a file in our assets folder app/src/main/assets/sample_teas.json.
To get an InputStream for reading it, from out Context context, we can try do this:
- A . val input = context!!.resources.openRawResource(R.raw.sample_teas)
- B . val input = context!!.assets.open("sample_teas.json")
- C . val input = context!!.resources.assets.open("sample_teas.json")
An example. In our ViewModelFactory (that implements ViewModelProvider.Factory) we have an instance of our Repository, named mRepository. Our ViewModel has such constructor: class MyViewModel(private val mRepository: MyRepository) : ViewModel()…
Next, in our ViewModelFactory create ViewModel method (overriden) looks like this:
override fun <T : ViewModel?> create(modelClass: Class<T>): T {
return try {
//MISSED RETURN VALUE HERE”
} catch (e: InstantiationException) {
throw RuntimeException("Cannot create an instance of $modelClass", e)
} catch (e: IllegalAccessException) {
throw RuntimeException("Cannot create an instance of $modelClass", e)
} catch (e: NoSuchMethodException) {
throw RuntimeException("Cannot create an instance of $modelClass", e)
} catch (e: InvocationTargetException) {
throw RuntimeException("Cannot create an instance of $modelClass", e)
}
}
What should we write instead of “//MISSED RETURN VALUE HERE”?
- A . modelClass.getConstructor()
.newInstance(mRepository) - B . modelClass.getConstructor(MyRepository::class.java)
.newInstance() - C . modelClass.getConstructor(MyRepository::class.java)
.newInstance(mRepository)
What is demonstrated by the code below?
// RawDao.kt
@Dao
interface RawDao { @RawQuery
fun getUserViaQuery(query: SupportSQLiteQuery?): User?
}
// Usage of RawDao
…
val query =
SimpleSQLiteQuery("SELECT * FROM User WHERE id = ? LIMIT 1", arrayOf<Any>(sortBy))
val user = rawDao.getUserViaQuery(query)
…
- A . A method in a Dao annotated class as a raw query method where you can pass the query as a SupportSQLiteQuery.
- B . A method in a Dao annotated class as a query method.
- C . A method in a RoomDatabase class as a query method.
What happens when you create a DAO method and annotate it with @Insert?
Example:
@Dao
interface MyDao {
@Insert(onConflict = OnConflictStrategy.REPLACE)
fun insertUsers(vararg users: User)
}
- A . Room generates an implementation that inserts all parameters into the database in a single transaction.
- B . Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.
- C . Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.
What do you want from Room when you create a DAO method and annotate it with @Update?
Example:
@Dao
interface MyDao {
@Update
fun updateUsers(vararg users: User)
}
- A . Room generates an implementation that inserts all parameters into the database in a single transaction.
- B . Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.
- C . Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.
What do you want from Room when you create a DAO method and annotate it with @Delete?
Example:
@Dao
interface MyDao {
@Delete
fun deleteUsers(vararg users: User)
}
- A . Room generates an implementation that inserts all parameters into the database in a single transaction.
- B . Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.
- C . Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.
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