小编use*_*435的帖子

我在ListFragment中使用drag-sort-listview(https://github.com/bauerca/drag-sort-listview).

当我在创建时启用dragsort时,事情正在发挥作用.但是,我希望将其禁用,直到对列表视图中的某个项目进行长按.

所以我想设置

mDslv.setDragEnabled(false);

在3个地方:onCreateView(),DragSortListView.DropListener和DragSortListView.RemoveListener

在我的ListFragment中,我有:

        listView.setOnItemLongClickListener( new AdapterView.OnItemLongClickListener(){ 
            @Override 
            public boolean onItemLongClick(AdapterView<?> av, View v, int pos, long id) {
                mDslv.setDragEnabled(true);
                return true; 
            } 
        });

我希望长按任何项目都会打开DSLV并允许删除或删除该项目,之后将再次禁用DSLV.

但是,在调用setDrageEnabled(true)之后(而不是while),我得到一个NullPointerException:

09-03 00:03:33.749: E/AndroidRuntime(9703): FATAL EXCEPTION: main
09-03 00:03:33.749: E/AndroidRuntime(9703): java.lang.NullPointerException
09-03 00:03:33.749: E/AndroidRuntime(9703):     at com.mobeta.android.dslv.DragSortController.onScroll(DragSortController.java:381)
09-03 00:03:33.749: E/AndroidRuntime(9703):     at android.view.GestureDetector.onTouchEvent(GestureDetector.java:541)
09-03 00:03:33.749: E/AndroidRuntime(9703):     at com.mobeta.android.dslv.DragSortController.onTouch(DragSortController.java:243)
09-03 00:03:33.749: E/AndroidRuntime(9703):     at android.view.View.dispatchTouchEvent(View.java:3881)
09-03 00:03:33.749: E/AndroidRuntime(9703):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:903)
09-03 00:03:33.749: E/AndroidRuntime(9703):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
09-03 00:03:33.749: E/AndroidRuntime(9703):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942)
09-03 00:03:33.749: E/AndroidRuntime(9703):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942) …

我的应用程序在启动时崩溃了所有Android Marshmallow arm64设备.用户以前在同一设备上使用Lollipop上的应用程序,但随后在设备更新为Marshmallow后开始报告这些崩溃.32位设备不受影响.崩溃报告看起来像这样:

ABI: 'arm64'
pid: 3531, tid: 3531, name: ompany.myapp  >>> com.mycompany.myapp <<<
signal 4 (SIGILL), code 1 (ILL_ILLOPC), fault addr 0x7f796d9370
    x0   0000000013087000  x1   0000007f8815da00  x2   0000000000000002  x3   0000000000000004
    x4   b42e90dfe44ab496  x5   b42e90dfe44ab496  x6   0000000000000000  x7   00000000019b7af0
    x8   0000000013087000  x9   0000007f87713000  x10  0000000000000601  x11  000000001308700c
    x12  0000000000002000  x13  0000000000002000  x14  000000006fb18428  x15  00000000013cd010
    x16  0000000000000000  x17  0000000000002000  x18  0000005594f27e90  x19  0000000000000003
    x20  0000000013087000  x21  0000007f75e00098  x22  00000000130d6e20  x23  0000000000000601
    x24  0000000000000000  x25  0000000000000001  x26  0000000000000000  x27  0000000000000000
    x28 …