Я работаю над своим первым приложением для Android.**
1 - просмотреть этот пустой фрагмент внутри frameLayout восновное действие:
фрагмент_карты.xml (фрагмент XML-файла)
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/hello_blank_fragment" />
</FrameLayout>
2 - FrameLayout находится внутри mainActivity, как это:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<FrameLayout
android:id="@+id/mapPlaceHolder"
android:layout_width="match_parent"
android:layout_height="match_parent"></FrameLayout>
</android.support.constraint.ConstraintLayout>
3- Попытка динамически добавить этот фрагмент в FrameLayout с помощью функции showMap ()
MainActivity class
public class MainActivity extends AppCompatActivity {
boolean activityIsReady= false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onResume() {
super.onResume();
activityIsReady = true;
}
@Override
protected void onPostResume() {
super.onPostResume();
showMap();
}
void showMap(){
if(activityIsReady == true) {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.mapPlaceHolder, new MapFragment());
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
}
4- MapFragment код (я только что создал новый фрагмент, и этот класс Java был создан автоматически)
public class MapFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public MapFragment() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment MapFragment.
*/
// TODO: Rename and change types and number of parameters
public static MapFragment newInstance(String param1, String param2) {
MapFragment fragment = new MapFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_map, container, false);
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
Проблема в том, что приложение вылетает после немедленного запуска.
Я пытался вызвать showMap () в функции OnCreate (). Но это не было выполнено.
LogCast : я нашел эти строки красным, но я не использую AudioFlinger
2018-12-10 13:23:25.747 1496-2985/? E/AudioFlinger: not enough memory for AudioTrack size=131296
2018-12-10 13:23:25.747 1496-2985/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
2018-12-10 13:23:25.748 2732-6423/? E/AudioRecord: AudioFlinger could not create record track, status: -12
2018-12-10 13:23:25.756 2732-6423/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
2018-12-10 13:23:25.756 2732-6423/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.