为RecyclerView滑动以关闭[关闭]-Java 学习之路

112

我曾经SwipeToDismiss库，但现在我正在尝试迁移到RecyclerView，事情并不那么明显，你知道这个lib的替换吗？任何想法如何从头开始实现它？

5 回答

327

从v22.2.0开始，Android支持团队已经包含了一个 ItemTouchHelper 类，它使刷卡到解除和拖放变得非常简单 . 这可能不像某些库那样功能齐全，但它直接来自Android团队 .

更新build.gradle以导入v22.2 . RecyclerView库的一部分

compile 'com.android.support:recyclerview-v7:22.2.+'

使用适当的SimpleCallback实例化ItemTouchHelper

ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
    [...]
    @Override
    public void onSwiped(RecyclerView.ViewHolder viewHolder, int swipeDir) {
        //Remove swiped item from list and notify the RecyclerView
    }
};

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);

**请注意，SimpleCallback会引导您要启用拖放的方向以及要启用滑动的路线 .

附加到您的RecyclerView

itemTouchHelper.attachToRecyclerView(recyclerView);

回复于 2024-05-15T02:37:52+08:00

ItemTouchHelper.SimpleCallback simpleCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
        @Override
        public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
            return false;
        }

        @Override
        public void onSwiped(final RecyclerView.ViewHolder viewHolder, int direction) {
            final int position = viewHolder.getAdapterPosition(); //get position which is swipe

            if (direction == ItemTouchHelper.LEFT) {    //if swipe left

                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); //alert for confirm to delete
                builder.setMessage("Are you sure to delete?");    //set message

                builder.setPositiveButton("REMOVE", new DialogInterface.OnClickListener() { //when click on DELETE
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        adapter.notifyItemRemoved(position);    //item removed from recylcerview
                        sqldatabase.execSQL("delete from " + TABLE_NAME + " where _id='" + (position + 1) + "'"); //query for delete
                        list.remove(position);  //then remove item

                        return;
                    }
                }).setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {  //not removing items if cancel is done
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        adapter.notifyItemRemoved(position + 1);    //notifies the RecyclerView Adapter that data in adapter has been removed at a particular position.
                        adapter.notifyItemRangeChanged(position, adapter.getItemCount());   //notifies the RecyclerView Adapter that positions of element in adapter has been changed from position(removed element index to end of list), please update it.
                        return;
                    }
                }).show();  //show alert dialog
            }
        }
    };
    ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleCallback);
    itemTouchHelper.attachToRecyclerView(recyclerView); //set swipe to recylcerview

在代码中如果用户向左滑动则显示AlertDialog，如果用户选择REMOVE，则会从数据库中删除item并刷新recyclelerview，如果用户选择CANCEL，则recyclelerview就是这样 .

回复于 2024-05-15T02:37:52+08:00

14

也许你可以尝试这个库：

https://github.com/daimajia/AndroidSwipeLayout

更新：我刚刚发现了另一个可以与RecyclerView一起使用的好库：

https://github.com/hudomju/android-swipe-to-dismiss-undo

回复于 2024-05-15T02:37:52+08:00
2

This library可能会有所帮助 . 您可以在 OnDissmiss 中使用 undo supertoast

回复于 2024-05-15T02:37:52+08:00

我写了SwipeToDeleteRV库，它支持回收器视图上的刷卡到删除 - 撤消功能 . 它基于ItemTouchHelper，非常易于使用 .

希望对面临同样问题的人有所帮助 .

例如，您可以像往常一样在XML布局中定义回收器视图，以及一些可选属性：

...
xmlns:stdrv="http://schemas.android.com/apk/res-auto"
...
<io.huannguyen.swipetodeleterv.STDRecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
stdrv:border_color="@android:color/darker_gray" // specify things like border color, border width, etc.
stdrv:delete_view_background="#cccccc"
stdrv:delete_icon="@drawable/ic_archive"
stdrv:delete_icon_height="24dp"
stdrv:delete_icon_width="24dp"
stdrv:left_delete_icon_margin="32dp"
stdrv:delete_message="@string/delete_message"
stdrv:right_delete_icon_margin="32dp"
stdrv:delete_icon_color="#000000"
stdrv:has_border="true"/>

所有stdrv属性都是可选的 . 如果您不指定它们，将使用默认值 .

然后创建一个子类STDAdapter的适配器，确保调用超类构造函数 . 像这样的东西：

public class SampleAdapter extends STDAdapter<String> {
public SampleAdapter(List<String> versionList) {
    super(versionList);
}

}

接下来确保调用 setupSwipeToDelete 方法来设置滑动到删除功能 .

mRecyclerView.setupSwipeToDelete(your_adapter_instance, swipe_directions);

swipe_directions 是允许滑动项目的方向 .

例：

// Get your recycler view from the XML layout
mRecyclerView = (STDRecyclerView) findViewById(R.id.recycler_view);
LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
mRecyclerView.setLayoutManager(layoutManager);
mAdapter = new SampleAdapter(versions);
// allow swiping in both directions (left-to-right and right-to-left)
mRecyclerView.setupSwipeToDelete(mAdapter, ItemTouchHelper.LEFT|ItemTouchHelper.RIGHT);

而已！对于更高级的设置（即，为不同的项目设置不同的删除消息，暂时和永久删除项目，...），请参阅项目自述页面 .

回复于 2024-05-15T02:37:52+08:00

为RecyclerView滑动以关闭[关闭]

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