無法膨脹視圖

Question

每當我嘗試將片段中的視圖膨脹時，我的應用就會崩潰：

...
import android.app.Fragment;

    public class MainFragment extends Fragment{

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.my_layout, parent, false);

            return v;
        }


        ...
    }

例外：

04-29 21:27:30.402: E/AndroidRuntime(3727): FATAL EXCEPTION: main
04-29 21:27:30.402: E/AndroidRuntime(3727): java.lang.RuntimeException: Unable to start activity ComponentInfo{ghang.mimyau.org.bitbucket/ghang.mimyau.org.bitbucket.mainactivity.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2463)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.ActivityThread.access$600(ActivityThread.java:162)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1366)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.os.Looper.loop(Looper.java:158)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.ActivityThread.main(ActivityThread.java:5751)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at java.lang.reflect.Method.invokeNative(Native Method)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at java.lang.reflect.Method.invoke(Method.java:511)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1083)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at dalvik.system.NativeStart.main(Native Method)
04-29 21:27:30.402: E/AndroidRuntime(3727): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at ghang.mimyau.org.bitbucket.mainactivity.MainFragment.onCreateView(MainFragment.java:24)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.Fragment.performCreateView(Fragment.java:1785)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:887)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1059)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.BackStackRecord.run(BackStackRecord.java:682)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1437)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.Activity.performStart(Activity.java:5174)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2436)
04-29 21:27:30.402: E/AndroidRuntime(3727):     ... 11 more
04-29 21:27:30.402: E/AndroidRuntime(3727): Caused by: java.lang.ClassCastException: com.google.android.gms.maps.SupportMapFragment cannot be cast to android.app.Fragment
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.Fragment.instantiate(Fragment.java:617)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.Fragment.instantiate(Fragment.java:592)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.app.Activity.onCreateView(Activity.java:4770)
04-29 21:27:30.402: E/AndroidRuntime(3727):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
04-29 21:27:30.402: E/AndroidRuntime(3727):     ... 22 more

我知道我可以使用android.support.v4.app.Fragment而不是android.app.Fragment解決此問題，但我不想這么做。 誰能解釋為什么僅支持庫在這種情況下起作用以及如何使標准庫起作用？

EDITED

Answer 1

stacktrace告訴您這里是什么問題：

com.google.android.gms.maps.SupportMapFragment無法轉換為android.app.Fragment

您正在嘗試將SupportMapFragment的實例app.Fragment轉換為app.Fragment 。 SupportMapFragment從Fragment的支持版本擴展而來； .v4.app.Fragment 用MapFragment替換SupportMapFragment或使用Fragment的支持版本。

Answer 2

布局名稱不能包含大寫字母，請嘗試將xml文件名更改為my_layout.xml而不是myLayout.xml，然后替換View v = inflater.inflate(R.layout.myLayout, parent, false); 對於View v = inflater.inflate(R.layout.my_layout, parent, false);