public static void displayShare(){
    // show share options
    CharSequence selections[] = new CharSequence[] {"Email","SMS","Tweet","Phone Call","Cancel"};
    final AlertDialog.Builder builder = new AlertDialog.Builder(CommonVariables.mContext);
    builder.setTitle("Share your location via...");
    builder.setItems(selections,new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog,int which) {
            switch(which){
                case 0: // Email
                   callEmailMethod();
                    break;
                case 1: // SMS
                    callSMSMethod();
                    break;
                case 2: // Tweet
                    callTwitterMethod();
                    break;
                case 3: // Phone Call
                    callNumberMethod();
                    break;
                case 4:
                    dialog.cancel();
                    break;
            }
        }
    });
    builder.show();
}

在以下行收到以下错误：builder.show();

FATAL EXCEPTION: main
Process: com.au.ewn.melbwater,PID: 2839
android.content.res.Resources$NotFoundException: Resource ID #0x0
    at android.content.res.Resources.getValue(Resources.java:1351)
    at android.content.res.Resources.loadXmlResourceParser(Resources.java:2774)
    at android.content.res.Resources.getLayout(Resources.java:1165)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:421)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
    at android.support.v7.app.AlertController$AlertParams.createListView(AlertController.java:879)
    at android.support.v7.app.AlertController$AlertParams.apply(AlertController.java:856)
    at android.support.v7.app.AlertDialog$Builder.create(AlertDialog.java:899)
    at android.support.v7.app.AlertDialog$Builder.show(AlertDialog.java:917)
    at com.au.ewn.activities.MainFragment.displayShare(MainFragment.java:1081)
    at com.au.ewn.activities.HelpMeScreen$2.onClick(HelpMeScreen.java:257)
    at android.view.View.performClick(View.java:5198)
    at android.view.View$PerformClick.run(View.java:21147)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5417)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

我已经尝试了一切(除了正确的解决方案,似乎).任何帮助表示赞赏,谢谢.

注意：CommonVariables.mContext是FragmentActivity的上下文,不是null：CommonVariables.mContext = FragmentAct.this;