Awaria aplikacji przy użyciu fragmentów

Question

Pracuję z fragmentami i ..

Mam problem w moim kodzie, którego nie mogę znaleźć.

Punkty logcat tego kawałka kodu w jednym z moich fragmentów:

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    return inflater.inflate(R.layout.activity_main, container, false); 
} 

Moje główne klasy (The FragmentActivity):

import android.app.Activity; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentActivity; 
import android.support.v4.app.FragmentTransaction; 
import android.view.View; 

public class Fragments extends FragmentActivity { 

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

     MainActivity fragment = new MainActivity(); 
     FragmentTransaction transaction = getSupportFragmentManager() 
       .beginTransaction(); 
     transaction.add(R.id.fragment_place, fragment); 
     transaction.commit(); 
    } 

    public void onSelectFragment(View view) { 

     Fragment newFragment; 

     if (view == findViewById(R.id.add)) { 
      newFragment = new Add(); 
     } else if (view == findViewById(R.id.map)) { 
      newFragment = new MainActivity(); 
     } else { 
      newFragment = new MainActivity(); 
     } 

     FragmentTransaction transaction = getSupportFragmentManager() 
       .beginTransaction(); 
     transaction.replace(R.id.fragment_place, newFragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 
    } 

} 

i LogCat:

09-30 00:02:52.363: E/AndroidRuntime(32284): FATAL EXCEPTION: main 
09-30 00:02:52.363: E/AndroidRuntime(32284): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.free/com.example.free.Fragments}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2185) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2210) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.ActivityThread.access$600(ActivityThread.java:142) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1208) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.os.Handler.dispatchMessage(Handler.java:99) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.os.Looper.loop(Looper.java:137) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.ActivityThread.main(ActivityThread.java:4931) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at java.lang.reflect.Method.invokeNative(Native Method) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at java.lang.reflect.Method.invoke(Method.java:511) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at dalvik.system.NativeStart.main(Native Method) 
09-30 00:02:52.363: E/AndroidRuntime(32284): Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class fragment 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at com.example.free.MainActivity.onCreateView(MainActivity.java:124) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:556) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1163) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.Activity.performStart(Activity.java:5018) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
09-30 00:02:52.363: E/AndroidRuntime(32284): ... 11 more 
09-30 00:02:52.363: E/AndroidRuntime(32284): Caused by: java.lang.ClassCastException: com.google.android.gms.maps.MapFragment cannot be cast to android.support.v4.app.Fragment 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.Fragment.instantiate(Fragment.java:402) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.Fragment.instantiate(Fragment.java:377) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:277) 
09-30 00:02:52.363: E/AndroidRuntime(32284): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676) 
09-30 00:02:52.363: E/AndroidRuntime(32284): ... 24 more 

Klasa "MainActivity" jest bardzo długa, więc wkleiłem ją za pomocą pasebin:

http://pastebin.com/Lt3wbNzD

Dzięki za pomoc!

Edit:

private GoogleMap map; 

FragmentTransaction transaction = getChildFragmentManager().beginTransaction(); 
     transaction.add(R.id.map, map).commit(); 

pokazuje błąd:

The method add(int, Fragment) in the type FragmentTransaction is not applicable for the arguments (int, GoogleMap)

Answer 1

Caused by: java.lang.ClassCastException: com.google.android.gms.maps.MapFragment cannot be cast to android.support.v4.app.Fragment 

nie można utworzyć fragmentu wewnątrz fragmentu za pomocą XML. Nie opublikowałeś xml dla fragmentu, ale domyślam się, że masz tam fragment mapy. Nadal można je dodać, ale trzeba je dodać dynamicznie przy użyciu getChildFragmentManager()

Answer 2

Musisz użyć tego

return inflater.inflate(R.layout.activity_main,null);

nie masz rodziców, jak to Fragment Transakcji ..

Answer 3

Z biblioteki wsparcia należy używać FrameLayout w xml jako uchwyt fragmentu zamiast fragmentu takiego jak ten:

<FrameLayout android:id="@+id/fragment_place" ... />