Question

我在活动A，B，C中有3个片段

片段A

public class fragmentA extends Fragment{
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup 
container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_a,container,false);
next = (TextView)view.findViewById(R.id.textView29);

 next.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
         Fragment fr = new fragmentB();
         FragmentManager fm = getFragmentManager();
         ragmentTransaction fragmentTransaction = fm.beginTransaction();
         fragmentTransaction.replace(R.id.fragment_place, fr);
         fragmentTransaction.addToBackStack(null);
         fragmentTransaction.commit();
   }
    });

   }}

在片段B内，我将PlaceAutocompleteFragment与地图视图一起使用 xml

     <fragment
        android:id="@+id/place_autocomplete"

  android:name="com.google.android.gms.location.places.ui.PlaceAutocompleteFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginEnd="20dp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginStart="20dp" />

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="130dp"
    android:layout_marginEnd="20dp"
    android:layout_marginLeft="20dp"
    android:layout_marginRight="20dp"
    android:layout_marginStart="20dp">

    <com.google.android.gms.maps.MapView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </com.google.android.gms.maps.MapView>
    <!-- Image View that acts as map marker notice centerInParent-->
    <ImageView
        android:id="@+id/map_custom_marker"
        android:layout_width="25dp"
        android:layout_height="25dp"
        android:layout_centerInParent="true"
        android:src="@drawable/map_marker_new" />


</RelativeLayout>

片段B

public class fragmentB extends Fragment{
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup 
container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_b,container,false);
next = (TextView)view.findViewById(R.id.textView29);

 MapView mMapView = (MapView) view.findViewById(R.id.mapView);
    MapsInitializer.initialize(getActivity());
    mMapView.onCreate(savedInstanceState);
    mMapView.onResume();

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        placeAutoComplete = (PlaceAutocompleteFragment)getChildFragmentManager().findFragmentById(R.id.place_autocomplete);
        AutocompleteFilter typeFilter = new AutocompleteFilter.Builder()
                .setTypeFilter(AutocompleteFilter.TYPE_FILTER_ADDRESS)
                .build();
        placeAutoComplete.setFilter(typeFilter);
    }


    mMapView.getMapAsync(new OnMapReadyCallback() {
        @Override
        public void onMapReady(final GoogleMap googleMap) {
            LatLng posisiabsen;
            posisiabsen = new LatLng(user_lat, user_lng); ////your lat lng

            googleMap.moveCamera(CameraUpdateFactory.newLatLng(posisiabsen));
            googleMap.getUiSettings().setZoomControlsEnabled(true);
            googleMap.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);

            placeAutoComplete.setOnPlaceSelectedListener(new PlaceSelectionListener() {
                @Override
                public void onPlaceSelected(Place place) {
                    // TODO: Get info about the selected place.
                    LatLng posisiabsen = place.getLatLng(); ////your lat lng
                    Log.e("lar",place.getLatLng().latitude+" "+place.getLatLng().longitude );
                    lat = place.getLatLng().latitude;
                    lng = place.getLatLng().longitude;
                    if(googleMap != null) {
                        googleMap.moveCamera(CameraUpdateFactory.newLatLng(posisiabsen));
                        googleMap.getUiSettings().setZoomControlsEnabled(true);
                        googleMap.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
                        Log.e("pl", "Place: " + place.getName());//get place details here
                    }

                }

                @Override
                public void onError(Status status) {
                    // TODO: Handle the error.
                    Log.e("pl", "An error occurred: " + status);
                }
            });

            googleMap.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
                @Override
                public void onCameraIdle() {
                    LatLng midLatLng = googleMap.getCameraPosition().target;
                    lat = midLatLng.latitude;
                    lng = midLatLng.longitude;
                    Log.e("location",midLatLng.latitude+" "+midLatLng.longitude);
                }
            });
        }



 next.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
         Fragment fr = new fragmentC();
         FragmentManager fm = getFragmentManager();
         ragmentTransaction fragmentTransaction = fm.beginTransaction();
         fragmentTransaction.replace(R.id.fragment_place, fr);
         fragmentTransaction.addToBackStack(null);
         fragmentTransaction.commit();
   }
    });

   public void onDestroyView() {
    super.onDestroyView();
    if (getActivity() != null) {
        FragmentManager fragmentManager = getActivity().getFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.remove(placeAutoComplete);
        fragmentTransaction.commit();
    }
}

   }}

和片段C

public class fragmentC extends Fragment{
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup 
container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_c,container,false);



   }}

主要活动

 public class Add_Main extends AppCompatActivity {

  @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add);

    if (Build.VERSION.SDK_INT >= 21) {
        try {
            getWindow().setStatusBarColor(ContextCompat.getColor(Add_Main.this, R.color.scolor));
        }
        catch (Exception e)
        {
        }
    }
}


@Override
public void onBackPressed() {
    Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.fragment_place);
    if (fragment != null && fragment.getChildFragmentManager().getBackStackEntryCount() > 0){
        try {
            fragment.getFragmentManager().popBackStack();
        }catch (Exception e){
            Log.e("error",e.getMessage().toString());
        }

    }else {
        super.onBackPressed();
    }
}

}

程序运行良好，但是我有一个问题是当我从片段B移到片段C时然后我按设备上的“主页”按钮，活动将进入“暂停”状态将引发以下错误

java.lang.IllegalStateException：保存失败状态：活动的PlaceAutocompleteFragment {98d9b08}已清除索引：-1

我猜是因为从片段B移到C后在ondestory调用时我要删除PlaceAutocompleteFragment

所以我尝试了它来更新这样的代码

FragmentManager fragmentManager = getActivity().getFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();

似乎出错了，但是当我使用onbackprssed从片段C返回到B时出现了问题

将引发另一个错误，我在PlaceAutocompleteFragment的xml中有重复的ID

android.view.InflateException：二进制XML文件第62行：二进制XML文件第62行：夸大类片段的错误原因：android.view.InflateException：二进制XML文件行＃62：错误夸大了类片段引起原因：java.lang.IllegalArgumentException：二进制XML文件第62行：重复的ID 0x7f1200e8，标记为null，o

知道我该如何处理吗？我需要保持碎片状态，但似乎我没有正确处理PlaceAutocompleteFragment状态，因此会导致错误

片段失败保存状态活动片段内的PlaceAutocompleteFragment已清除索引

0 个答案: