小编Aks*_*ngh的帖子

我是android ArrayAdapters的新手,我在填充ListView时面临一个空指针异常.我用来填充listview的数据不是null,我已经检查过了.整个事情在第一次加载时工作正常,但是一旦我向下滚动到列表的末尾,应用程序崩溃了.

这是我的堆栈跟踪:

E/AndroidRuntime? FATAL EXCEPTION: main
java.lang.NullPointerException
        at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:394)
        at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
        at android.widget.AbsListView.obtainView(AbsListView.java:2386)
        at android.widget.ListView.makeAndAddView(ListView.java:1769)
        at android.widget.ListView.fillDown(ListView.java:672)
        at android.widget.ListView.fillGap(ListView.java:636)
        at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5201)
        at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4358)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
        at android.view.Choreographer.doCallbacks(Choreographer.java:555)
        at android.view.Choreographer.doFrame(Choreographer.java:524)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
        at android.os.Handler.handleCallback(Handler.java:615)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:5059)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
        at dalvik.system.NativeStart.main(Native Method)

这是我的活动代码:"我已经标记了我填充listView的行"

public class AddPersonActivity extends Activity
    implements
    PlusClient.OnPeopleLoadedListener,
    PlusClient.ConnectionCallbacks,
    PlusClient.OnConnectionFailedListener {

private static final String TAG = "AddPersonActivity";

private static final String STATE_RESOLVING_ERROR = "resolving_error";

private ArrayAdapter sListAdapter; …