Android Gridview在滚动后不保存选择内容

Question

[嗨，我需要帮助以找到为什么我的Android gridview中的选择不起作用的原因。我正在尝试在我的应用程序中添加功能，以允许用户突出显示所选项目。它正在工作（即，选中的项目突出显示），但是一旦我滚动，所选内容就会消失。另外，如果我选择6个单元格，则突出显示第8个单元格。

下面是代码：XML

   <TableRow
        android:layout_width="wrap_content"
        android:layout_height="@dimen/student_activity_first_row"
        android:layout_marginTop="10dp">

        <RelativeLayout
            android:id="@+id/relLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginBottom="30dp">

            <!--grid view for students goes here-->


            <GridView xmlns:android="http://schemas.android.com/apk/res/android"
                android:id="@+id/grid_view"
                android:layout_marginTop="90dip"
                android:layout_width="fill_parent"
                android:layout_height="330dp"
                android:numColumns="auto_fit"
                android:horizontalSpacing="20dp"
                android:verticalSpacing="20dp"
                android:gravity="center"
                android:stretchMode="columnWidth"
                android:layout_marginBottom="20dp"
                >

            </GridView>


        </RelativeLayout>


    </TableRow>

下面是GridView的绑定和选择：

private void BindData(String filter) {
    GridView gridView = findViewById(R.id.grid_view);
    CommonUtils utils = new CommonUtils();
    String dropdate = utils.getTodaysDate();

    final Booking h = new Booking();

    bookingsList = new ArrayList<Booking>();

    bookingsList = h.getAllBookingsForClassroom(ASCActivity.this, room_id, dropdate,filter);
    adapter = new BookingGridViewAdapter(ASCActivity.this, bookingsList,true);
    gridView.setAdapter(adapter);
    final SharedPreferences pref =  this.getSharedPreferences(SETTINGS_PREFS_NAME, Context.MODE_PRIVATE);




    // OnClick
    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v,

                                int position, long id) {

            GridView gridView = ASCActivity.this.findViewById(R.id.grid_view);

            final int size = gridView.getChildCount();
            CommonUtils utils = new CommonUtils();

            for(int i = 0; i < size; i++) {
                ViewGroup gridChild = (ViewGroup) gridView.getChildAt(position);

                if (gridChild != null) {
                    LinearLayout tv = (LinearLayout) gridChild.findViewById(R.id.parentPanel);
                    int color = ((ColorDrawable)tv.getBackground()).getColor();
                    if(color == -4591){
                        tv.setBackgroundColor(Color.parseColor("#ffee12"));
                    }else{
                        tv.setBackgroundColor(Color.parseColor("#ffee11"));
                    }
                    break;
                }
            }

    }

}

Answer 1

[BindData()将在您滚动到顶部或底部时被调用，并且视图将重置为初始状态，因此在Booking模型中维护状态数组或状态布尔值，并比较布尔值以检查是否选中]