Activity类：
private String[] mStrings2={"Title 01","Title 02"};
private String[] mStrings = {"Link to the image1", "Link to the image2"};
MyAdapter adapter;
mainList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
adapter=new LazyAdapter(this, mStrings, mStrings2);
subList.setAdapter(adapternew);
}
});
MyAdapter class (MyAdapter.java)
private Activity activity;
private String[] data;
private String[] data2;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
//Constructor
public LazyAdapter(Activity a, String[] d, String[] mStrings2) {
activity = a;
data=d;
data2=mStrings2;
inflater = LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
当我点击第一个 List Item，我想把元素加载到第二个数组中。但是当执行程序后，获得NullPointerException异常。就是说ListView中OnItemClickListener事件不能执行。大家能指导下哪出错了吗？
12-04 14:21:42.499: E/AndroidRuntime(1429): java.lang.NullPointerException
12-04 14:21:42.499: E/AndroidRuntime(1429): at com.java.hotelapp.Item_List$1.onItemClick(Item_List.java:106)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.widget.AdapterView.performItemClick(AdapterView.java:282)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.widget.AbsListView.performItemClick(AbsListView.java:1037)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2449)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.widget.AbsListView$1.run(AbsListView.java:3073)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.os.Handler.handleCallback(Handler.java:587)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.os.Handler.dispatchMessage(Handler.java:92)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.os.Looper.loop(Looper.java:132)
12-04 14:21:42.499: E/AndroidRuntime(1429): at android.app.ActivityThread.main(ActivityThread.java:4123)
12-04 14:21:42.499: E/AndroidRuntime(1429): at java.lang.reflect.Method.invokeNative(Native Method)
12-04 14:21:42.499: E/AndroidRuntime(1429): at java.lang.reflect.Method.invoke(Method.java:491)
12-04 14:21:42.499: E/AndroidRuntime(1429): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
12-04 14:21:42.499: E/AndroidRuntime(1429): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
12-04 14:21:42.499: E/AndroidRuntime(1429): at dalvik.system.NativeStart.main(Native Method)
