我正在设计具有向后兼容性的应用程序，因此我实现了支持和设计库，以使用导航抽屉和其他与新Android版本相关的效果。
导航抽屉管理总共5个片段。其中一个片段包含一个地图：
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="300dp"
class="com.google.android.gms.maps.MapFragment" />
-
public class LocationFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_location, container, false);
/*Try to obtain the map from the SupportMapFragment*/
mMap = ((MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map)).getMap();
这就是我在mainActivity上管理导航抽屉中片段的方式：
public class MainActivity extends AppCompatActivity implements DrawerLayout.DrawerListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
navView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override public boolean onNavigationItemSelected(MenuItem menuItem) {
menuItem.setChecked(true);
displayFragment(menuItem.getItemId());
drawerLayout.closeDrawers();
return true;
}
});
private void displayFragment(int itemId) {
Fragment fragment = null;
String title = getString(R.string.app_name);
switch (itemId) {
case R.id.navigation_item_1:
fragment = new StatusFragment();
title = getString(R.string.title_status);
break;
case R.id.navigation_item_2:
fragment = new LocationFragment();
title = getString(R.string.title_location);
break;
case R.id.navigation_item_3:
fragment = new SetupFragment();
title = getString(R.string.title_setup);
break;
case R.id.navigation_item_4:
fragment = new ProfileFragment();
title = getString(R.string.title_profile);
break;
case R.id.navigation_item_5:
fragment = new AboutFragment();
title = getString(R.string.title_about);
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment);
fragmentTransaction.commit();
/*set the toolbar title*/
toolbar.setTitle(title);
}
}
问题是，如果我打开这个地图片段，它工作正常，但如果我转到另一个片段，然后回到地图片段，应用程序崩溃显示在logcat中：
android.view.InflateException: Binary XML file line #11: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.masmr.detgprs.LocationFragment.onCreateView(LocationFragment.java:102)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1789)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:955)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:458)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5146)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: Binary XML file line #11: Duplicate id 0x7f0c0090, tag null, or parent id 0xffffffff with another fragment for com.google.android.gms.maps.MapFragment
at android.app.Activity.onCreateView(Activity.java:4791)
at
android.support.v7.app.AppCompatDelegateImplV11.callActivityOnCreateView(AppCompatDelegateImplV11.java:41)
at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:826)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:172)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:684)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.masmr.detgprs.LocationFragment.onCreateView(LocationFragment.java:102)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1789)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:955)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:458)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5146)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
at dalvik.system.NativeStart.main(Native Method)
102行是指地图片段的onCreateView（）的第一行，我在那里给map_layout充气。
答案 0 :(得分：5)
只需在Fragment
@Override
public void onDestroyView ()
{
try{
MapFragment fragment = ((MapFragment) getFragmentManager().findFragmentById(R.id.map));
FragmentTransaction ft = getActivity().getFragmentManager().beginTransaction();
ft.remove(fragment);
ft.commit();
}catch(Exception e){
}
super.onDestroyView();
}
答案 1 :(得分：0)
你可以这样做：
fragment_map.xml ：
<com.google.android.gms.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<强> MyMapFragment.java ：
private GoogleMap mMap;
private MapView mapView;
片段的 onCreaeView（）：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
initializaMap(rootView, savedInstanceState);
}
private void initializaMap(View rootView, Bundle savedInstanceState){
MapsInitializer.initialize(getActivity());
switch (GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity())) {
case ConnectionResult.SUCCESS:
mapView = (MapView) rootView.findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
if (mapView != null) {
mMap = mapView.getMap();
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
UiSettings mUiSettings = mMap.getUiSettings();
mMap.setMyLocationEnabled(true);
mMap.animateCamera(CameraUpdateFactory.zoomTo(7.0f));
mUiSettings.setCompassEnabled(true);
mUiSettings.setMyLocationButtonEnabled(false);
}
break;
case ConnectionResult.SERVICE_MISSING:
break;
case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED:
break;
default:
}
}
on onResume（）：
@Override
public void onResume() {
super.onResume();
if(mapView!=null){
mapView.onResume();
}
}
@Override
public void onDestroy() {
super.onDestroy();
if(mapView!=null){
mapView.onDestroy();
}
}
@Override
public void onLowMemory() {
super.onLowMemory();
if(mapView!=null){
mapView.onLowMemory();
}
}
完成