[Q] Cannot replace one fragment with a map fragment - Android Q&A, Help & Troubleshooting

Hallo!
It seems that I have a comprehension problem regarding fragments and their use together with map views.
In my app (only für Android >= 4.0.0) I am using a layout with a container. This container shall be filled with either a normal text view, a map view or a settings fragment. The switching between the two first views are done depending on a switch in the settings fragment.
To switch between the fragments I implemented a setView() method in my MainActivity. Switching from Map to Settings works fine. Just as replacing the map view fragment with the text view fragment. But a soon as I try to replace the text view fragment with my map fragment an exception is thrown
I tried a lot of things to avoid this, but now I gave up
Maybe it helps... so here are some sections of my code:
1) setView()
Code:
protected void setView(boolean setMap) {
if (setMap == true) {
Log.i(TAG, "Inflating Google Maps fragment");
this.fragmentMap = new FragmentMap();
if (this.fragmentText != null) {
Log.d(TAG, "Removing text fragment");
getFragmentManager().beginTransaction()
.remove(this.fragmentText).commit();
}
Log.d(TAG, "Replacing container with map fragment");
getFragmentManager().beginTransaction()
.replace(R.id.container, this.fragmentMap).commit();
this.useMap = true;
} else if (setMap == false) {
Log.i(TAG, "Inflating text fragment");
this.fragmentText = new FragmentText();
if (this.fragmentMap != null) {
Log.d(TAG, "Removing map fragment");
getFragmentManager().beginTransaction()
.remove(this.fragmentMap).commit();
}
Log.d(TAG, "Replacing container with text fragment");
getFragmentManager().beginTransaction()
.replace(R.id.container, this.fragmentText).commit();
this.useMap = false;
}
}
The coresponding map fragment class uses this method:
Code:
public class FragmentMap extends Fragment {
private View view;
[...]
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Be sure to inflate only one map view
if (view == null) {
Log.d(TAG, "We need to inflate a new map view...");
view = inflater.inflate(R.layout.layout_map, container, false);
Log.d(TAG, "...ok");
} else {
Log.d(TAG,
"No need to inflate a new map view. We already have one ;)");
}
[...]
return view;
}
From within my settings fragment I call the setView() method inside the MainActivity.
As said it works if I switch from fragmentMap to fragmentText. Switching from text to map throws the following:
10-10 20:12:41.234: D/FragmentMap(5794): onCreate()
10-10 20:12:41.234: D/FragmentMap(5794): We need to inflate a new map view...
10-10 20:12:41.241: D/AndroidRuntime(5794): Shutting down VM
10-10 20:12:41.241: W/dalvikvm(5794): threadid=1: thread exiting with uncaught exception (group=0x40a96300)
10-10 20:12:41.257: E/AndroidRuntime(5794): FATAL EXCEPTION: main
10-10 20:12:41.257: E/AndroidRuntime(5794): android.view.InflateException: Binary XML file line #51: Error inflating class <unknown>
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.view.LayoutInflater.createView(LayoutInflater.java:613)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.view.LayoutInflater.rInflate(LayoutInflater.java:749)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
10-10 20:12:41.257: E/AndroidRuntime(5794): at com.example.fragment5.FragmentMap.onCreateView(FragmentMap.java:69)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:829)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.app.BackStackRecord.run(BackStackRecord.java:635)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1397)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.app.FragmentManagerImpl$1.run(FragmentManager.java:426)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.os.Handler.handleCallback(Handler.java:615)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.os.Handler.dispatchMessage(Handler.java:92)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.os.Looper.loop(Looper.java:137)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.app.ActivityThread.main(ActivityThread.java:4931)
10-10 20:12:41.257: E/AndroidRuntime(5794): at java.lang.reflect.Method.invokeNative(Native Method)
10-10 20:12:41.257: E/AndroidRuntime(5794): at java.lang.reflect.Method.invoke(Method.java:511)
10-10 20:12:41.257: E/AndroidRuntime(5794): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
10-10 20:12:41.257: E/AndroidRuntime(5794): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
10-10 20:12:41.257: E/AndroidRuntime(5794): at dalvik.system.NativeStart.main(Native Method)
10-10 20:12:41.257: E/AndroidRuntime(5794): Caused by: java.lang.reflect.InvocationTargetException
10-10 20:12:41.257: E/AndroidRuntime(5794): at java.lang.reflect.Constructor.constructNative(Native Method)
10-10 20:12:41.257: E/AndroidRuntime(5794): at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
10-10 20:12:41.257: E/AndroidRuntime(5794): at android.view.LayoutInflater.createView(LayoutInflater.java:587)
10-10 20:12:41.257: E/AndroidRuntime(5794): ... 20 more
10-10 20:12:41.257: E/AndroidRuntime(5794): Caused by: java.lang.IllegalStateException: You are only allowed to have a single MapView in a MapActivity
10-10 20:12:41.257: E/AndroidRuntime(5794): at com.google.android.maps.MapActivity.setupMapView(MapActivity.java:397)
10-10 20:12:41.257: E/AndroidRuntime(5794): at com.google.android.maps.MapView.<init>(MapView.java:289)
10-10 20:12:41.257: E/AndroidRuntime(5794): at com.google.android.maps.MapView.<init>(MapView.java:264)
10-10 20:12:41.257: E/AndroidRuntime(5794): at com.google.android.maps.MapView.<init>(MapView.java:247)
10-10 20:12:41.257: E/AndroidRuntime(5794): ... 23 more
Click to expand...
Click to collapse
Does anyone can help me?
Thank you very much!!!