Question

在我的代码中，我想实现向左/向右滑动功能

其中一项可以接受，另一项可以拒绝

从左到右快速运行，根本没有问题。您可以看到屏幕截图。

但是当我尝试从右向左显示时，我有一个问题，它什么也没显示。我只是一个白色的屏幕。在此处查看屏幕截图

我应该有这个

我可以将代码放在这里。

public class SwipeToDeleteCallback extends ItemTouchHelper.SimpleCallback {

    private DriverOrderAdapter mAdapter;

    public SwipeToDeleteCallback(final DriverOrderAdapter adapter) {
        super(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT);
        mAdapter = adapter;
    }

    @Override
    public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {
        if (viewHolder != null) {
            final View foregroundView = ((DMBaseAdapter.BaseViewHolder<DriverOrderItemBinding>) viewHolder).binding.llForeground;

            getDefaultUIUtil().onSelected(foregroundView);
        }
    }

    @Override
    public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
        return false;
    }

    @Override
    public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
        int position = viewHolder.getAdapterPosition();
        mAdapter.deleteItem(position);
    }

    @Override
    public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {

        final View foregroundView = ((DMBaseAdapter.BaseViewHolder<DriverOrderItemBinding>) viewHolder).binding.llForeground;

        drawBackground(viewHolder, dX, actionState);

        getDefaultUIUtil().onDraw(c, recyclerView, foregroundView, dX, dY, actionState, isCurrentlyActive);


    }

    @Override
    public void onChildDrawOver(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
        final View foregroundView = ((DMBaseAdapter.BaseViewHolder<DriverOrderItemBinding>) viewHolder).binding.llForeground;

        drawBackground(viewHolder, dX, actionState);

        getDefaultUIUtil().onDrawOver(c, recyclerView, foregroundView, dX, dY, actionState, isCurrentlyActive);
    }

    @Override
    public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
        final View rlBackground = ((DMBaseAdapter.BaseViewHolder<DriverOrderItemBinding>) viewHolder).binding.rlBackground;
        final View foregroundView = ((DMBaseAdapter.BaseViewHolder<DriverOrderItemBinding>) viewHolder).binding.llForeground;

        // TODO: should animate out instead. how?
        rlBackground.setRight(0);

        getDefaultUIUtil().clearView(foregroundView);
    }

    private static void drawBackground(RecyclerView.ViewHolder viewHolder, float dX, int actionState) {
        final View rlBackground = ((DMBaseAdapter.BaseViewHolder<DriverOrderItemBinding>) viewHolder).binding.rlBackground;
        final View rlBackground2 = ((DMBaseAdapter.BaseViewHolder<DriverOrderItemBinding>) viewHolder).binding.rlBackground2;

        if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
            //noinspection NumericCastThatLosesPrecision

            if (dX > 0) {
                rlBackground.setRight((int) Math.max(dX, 0));

                rlBackground.setVisibility(View.VISIBLE);
                rlBackground2.setVisibility(View.GONE);
//                Log.d("myLogs", "1 " + dX);
            } else if (dX < 0) {
                rlBackground.setRight((int) Math.max((-1) * dX, 0));
//                rlBackground2.setRight((int) Math.max(aaa, 0));

                rlBackground.setVisibility(View.GONE);
                rlBackground2.setVisibility(View.VISIBLE);
//                Log.d("myLogs", "2 " + dX);
            } else {
                rlBackground.setVisibility(View.GONE);
                rlBackground2.setVisibility(View.GONE);
//                Log.d("myLogs", "0");

                rlBackground.setRight((int) Math.max(dX, 0));
//                rlBackground2.setRight((int) Math.max(dX, 0));
            }
        }


    }
}

这是我的xml

<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

        <variable
            name="order"
            type="com.core.model.Order" />

        <variable
            name="context"
            type="android.content.Context" />

    </data>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <RelativeLayout
            android:id="@+id/rl_background"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:background="@color/bg_color_9">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginStart="30dp"
                android:gravity="center_horizontal"
                android:orientation="vertical"
                tools:ignore="UselessParent">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/ic_driver_accept"
                    tools:ignore="ContentDescription" />

                <TextView
                    style="@style/text_view_text_size_1"
                    android:layout_marginTop="7dp"
                    android:text="Accept"
                    android:textColor="@color/text_color_8"
                    android:textSize="@dimen/text_view_text_size_3" />

            </LinearLayout>

        </RelativeLayout>

        <RelativeLayout
            android:id="@+id/rl_background_2"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:background="@color/bg_color_10">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_centerVertical="true"
                android:layout_marginEnd="30dp"
                android:gravity="center_horizontal"
                android:orientation="vertical"
                tools:ignore="UselessParent">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/ic_driver_decline"
                    tools:ignore="ContentDescription" />

                <TextView
                    style="@style/text_view_text_size_1"
                    android:layout_marginTop="7dp"
                    android:text="Decline"
                    android:textColor="@color/text_color_9"
                    android:textSize="@dimen/text_view_text_size_3" />

            </LinearLayout>

        </RelativeLayout>

        <LinearLayout
            android:id="@+id/ll_foreground"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:paddingStart="@dimen/activity_horizontal_margin_for_content"
                android:paddingEnd="@dimen/activity_horizontal_margin_for_content">

                <ImageView
                    android:id="@+id/iv_right_arrow"
                    android:layout_width="9dp"
                    android:layout_height="9dp"
                    android:layout_alignParentEnd="true"
                    android:layout_centerVertical="true"
                    android:src="@drawable/ic_arrow_right"
                    tools:ignore="ContentDescription" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:layout_marginStart="@dimen/activity_horizontal_margin_for_content"
                    android:layout_marginTop="15dp"
                    android:layout_toStartOf="@id/iv_right_arrow"
                    android:orientation="vertical">

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="horizontal">

                        <LinearLayout
                            android:layout_width="24dp"
                            android:layout_height="24dp"
                            android:layout_gravity="center_vertical"
                            android:gravity="center_vertical"
                            android:orientation="vertical">

                            <View
                                android:layout_width="6dp"
                                android:layout_height="6dp"
                                android:layout_gravity="center_horizontal"
                                android:background="@drawable/shape_circle_1" />

                        </LinearLayout>


                        <TextView
                            android:id="@+id/tv_from"
                            style="@style/text_view_text_size_1"
                            android:layout_gravity="center_vertical"
                            android:layout_marginStart="16dp"
                            android:text="@{order.point_a}"
                            android:textStyle="bold" />

                    </LinearLayout>

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="5dp"
                        android:orientation="horizontal">

                        <LinearLayout
                            android:layout_width="24dp"
                            android:layout_height="24dp"
                            android:layout_gravity="center_vertical"
                            android:gravity="center_vertical"
                            android:orientation="vertical">

                            <View
                                android:layout_width="6dp"
                                android:layout_height="6dp"
                                android:layout_gravity="center_horizontal"
                                android:background="@drawable/shape_circle_2" />

                        </LinearLayout>

                        <TextView
                            android:id="@+id/tv_to"
                            style="@style/text_view_text_size_1"
                            android:layout_marginStart="16dp"
                            android:text="@{order.point_b}" />

                    </LinearLayout>

                </LinearLayout>


            </RelativeLayout>

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="56dp"
                android:paddingStart="@dimen/activity_horizontal_margin_for_content"
                android:paddingEnd="@dimen/activity_horizontal_margin_for_content">

                <TextView
                    android:id="@+id/tv_price_and_payment_type"
                    style="@style/text_view_text_size_1"
                    android:layout_width="match_parent"
                    android:layout_marginEnd="10dp"
                    android:layout_toStartOf="@id/tv_time"
                    android:singleLine="true" />

                <TextView
                    android:id="@+id/tv_time"
                    style="@style/text_view_text_size_1"
                    android:layout_alignParentEnd="true"
                    android:singleLine="true"
                    android:text="@{order.direction_duration}"
                    android:textColor="@color/text_color_4"
                    android:textSize="@dimen/text_view_text_size_3" />

            </RelativeLayout>

            <TextView
                android:id="@+id/tv_text"
                style="@style/text_view_text_size_1"
                android:layout_marginStart="56dp"
                android:layout_marginTop="7dp"
                android:paddingStart="@dimen/activity_horizontal_margin_for_content"
                android:paddingEnd="@dimen/activity_horizontal_margin_for_content"
                android:text="@{order.comment}"
                android:textColor="@color/text_color_4"
                android:textSize="@dimen/text_view_text_size_3" />

            <View
                android:layout_width="match_parent"
                android:layout_height="1dp"
                android:layout_marginTop="12dp"
                android:background="@color/bg_color_3" />

        </LinearLayout>

    </FrameLayout>


</layout>

我知道问题来自rlBackground.setRight((int) Math.max((-1) * dX, 0));这行。

谁能告诉我该在哪里显示我被拒绝的观点？我尝试了很多方法。我也尝试了setLeft方法-没有结果

请有人可以帮我还是给我一个例子？

RecylerView向左/向右滑动ui问题

0 个答案: