小编USE*_*762的帖子

我正在准备一个与餐厅管理相关的Android应用程序.我需要在pos软件等其他Windows应用程序中连接应用程序.该Windows应用程序使用Apache Derby数据库.我可以将那个windows pos连接到我的Android应用程序的前端吗？

如何在listView中存储可点击的项目(很多)值并在下一个Activity listView中显示项目.我尝试了但是我只从前一个Activity listView.i获得了一个值(如果我点击了更多的项目,最后一个只显示) used String [] type GlobalVariable myval;

GlobalClass

class GlobalClass extends Application {
     public static String[] myval;
}

HomeActivity

public  class HomeActivity extends Activity {
    String[] Category={"----SELECT---- ","BEVERAGES","BREAKFAST","LUNCH","DINNER","DESSERTS","APPETIZERS & SIDES"};
    String[] Beverage={"PEPSI","COKE","LASSI","FALOODA","BUTTER MILK","GREEN TEA","BADAM MILK","MASALA CHAI" };
    String[] Breakfast={"SIRLOIN & EGG","CFS STEAK & EGG","T-BONE & EGG","TWO EGGS BREAKFAST","2EGG W/MEAT","BEL WAFFLE","BEL WAFFLE W/MEAT","BLUEBERRY CAKE","CAKES","FABULOUS FRENCH TST","MOONS","FRENCH TST"};
    String[] Lunch={" CRAB CAKE SANDWICH","TUSCAN GRILLED CHICKEN PANINI","SOUTHWEST TURKEY CLUB"," LOBSTER ROLL","TUNA MELT"," FRENCH DIP","YOUR OWN SANDWICH"};
    String[] Dinner={"DUBLIN BAY PRAWN","CRAB FROM …

如何在Next Activity.i中使用两列到Custom ListView获取自定义ListView的值,具有select1和select2 String [] variables.Myval是Global Variable.i具有以下异常*

logcat中的异常:

    07-31 10:37:55.470: E/AndroidRuntime(974): FATAL EXCEPTION: main
    07-31 10:37:55.470: E/AndroidRuntime(974): java.lang.NullPointerException
    07-31 10:37:55.470: E/AndroidRuntime(974):  at                android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:394)
     07-31 10:37:55.470: E/AndroidRuntime(974):     at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.AbsListView.obtainView(AbsListView.java:2033)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.ListView.makeAndAddView(ListView.java:1772)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.ListView.fillDown(ListView.java:672)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.ListView.fillFromTop(ListView.java:732)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.ListView.layoutChildren(ListView.java:1625)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.AbsListView.onLayout(AbsListView.java:1863)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.view.View.layout(View.java:11278)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.view.ViewGroup.layout(ViewGroup.java:4224)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
    07-31 10:37:55.470: E/AndroidRuntime(974):  at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
    07-31 10:37:55.470: …