Android应用程序中的SimpleExpandableListAdapter问题

Question

I try to change a source code passing from android 2 to android 4.. The code doesn't gets me error and the application starts. But at the beginning there is a login. When i click on "Login" the app crashes. The logcat displays that there is a problem with SimpleExpandableListAdapter . this is the part of code that use the SimpleExpandableListAdapter:

expListAdapter = new SimpleExpandableListAdapter(_ContactScreen_object,
                _groupSections, // groupData describes the first-level entries
                R.layout.group_row, // Layout for the first-level entries
                new String[] { "sectionName" }, // Key in the groupData maps to
                // display
                new int[] { R.id.groupname }, // Data under "friendName" key
                // goes into this TextView
                _result, // childData describes second-level entries
                R.layout.child_row, // Layout for second-level entries
                new String[] { "friendName", "status" }, // Keys in childData
                // maps to display
                new int[] { R.id.childname, R.id.rgb } // Data under the keys
        // above go into these
        // TextViews
        ) 

logcat:

Do you think that the problem is the code is old? The structure of SimpleExpandableListAdapter is different now? What have i to change?

Answer 1

The Context param _ContactScreen_object is null . Here's line 210 of SimpleExpandableListAdapter.java :

mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

More context (sic) of your code needed to provide further help.