滑动ListView项目从右到左显示删除按钮

Question

我有一个自定义ListView显示从数据库中选择的单词列表.当我刷这个listview项目时,我想显示删除按钮,如下图所示.当我按下该按钮时,它将从数据库中删除并刷新列表视图.米

我已在这里查看此示例代码.但它仍然无效.

Answer 1

编辑:在其他选项之间有一个很好的库可以解决您的问题:https: //github.com/daimajia/AndroidSwipeLayout

Answer 2

我已经搜索了很多谷歌,并找到最合适的项目是github上的swipmenulistview https://github.com/baoyongzhang/SwipeMenuListView.

Answer 3

我曾经遇到同样的问题,找到一个好的库来做到这一点.最后,我创建了一个可以做到这一点的库:SwipeRevealLayout

在gradle文件中:

dependencies {
    compile 'com.chauthai.swipereveallayout:swipe-reveal-layout:1.4.0'
}

在您的xml文件中:

<com.chauthai.swipereveallayout.SwipeRevealLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:mode="same_level"
    app:dragEdge="left">

    <!-- Your secondary layout here -->
    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent" />

    <!-- Your main layout here -->
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</com.chauthai.swipereveallayout.SwipeRevealLayout>

然后在你的适配器文件中:

public class Adapter extends RecyclerView.Adapter {
  // This object helps you save/restore the open/close state of each view
  private final ViewBinderHelper viewBinderHelper = new ViewBinderHelper();

  @Override
  public void onBindViewHolder(ViewHolder holder, int position) {
    // get your data object first.
    YourDataObject dataObject = mDataSet.get(position); 

    // Save/restore the open/close state.
    // You need to provide a String id which uniquely defines the data object.
    viewBinderHelper.bind(holder.swipeRevealLayout, dataObject.getId()); 

    // do your regular binding stuff here
  }
}

Answer 4

我在我的github上创建了一个演示,其中包括从右到左滑动时会出现一个删除按钮,然后您可以从ListView中删除您的项目并更新您的ListView.

Answer 5

我只是在ListItem中使用ViewSwitcher工作.

list_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<ViewSwitcher
    android:id="@+id/list_switcher"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:inAnimation="@android:anim/slide_in_left"
    android:outAnimation="@android:anim/slide_out_right"
    android:measureAllChildren="false" >
    <TextView
        android:id="@+id/tv_item_name"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_gravity="center_vertical"
        android:maxHeight="50dp"
        android:paddingLeft="10dp" />

    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:clickable="false"
        android:gravity="center"
        >

    <Button
        android:id="@+id/b_edit_in_list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Edit"
        android:paddingLeft="20dp"
        android:paddingRight="20dp"

         />
    <Button
        android:id="@+id/b_delete_in_list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Delete"
        android:paddingLeft="20dp"
        android:paddingRight="20dp"
        android:background="@android:color/holo_red_dark"
        />
    </LinearLayout>
</ViewSwitcher>

在ListAdapter中:为getView()方法中的Edit和Delete按钮实现OnclickListeners.这里的问题是获取在onClick方法中单击的ListItem的位置.setTag()和getTag()方法用于此目的.

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    final ViewHolder viewHolder;
    if (convertView == null) {
        viewHolder = new ViewHolder();
        convertView = mInflater.inflate(R.layout.list_item, null);
        viewHolder.viewSwitcher=(ViewSwitcher)convertView.findViewById(R.id.list_switcher);
        viewHolder.itemName = (TextView) convertView
                .findViewById(R.id.tv_item_name);
        viewHolder.deleteitem=(Button)convertView.findViewById(R.id.b_delete_in_list);
        viewHolder.deleteItem.setTag(position);
        viewHolder.editItem=(Button)convertView.findViewById(R.id.b_edit_in_list);
        viewHolder.editItem.setTag(position);
        viewHolder.deleteItem.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                fragment.deleteItemList((Integer)v.getTag());
            }
        });

        viewHolder.editItem.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                fragment.editItemList(position);
            }
        });
        convertView.setTag(viewHolder);
} else {
        viewHolder = (ViewHolder) convertView.getTag();
    }

    viewHolder.itemName.setText(itemlist[position]);
return convertView;  
}

在Fragment中,添加一个Gesture Listener来检测Fling手势:

public class MyGestureListener extends SimpleOnGestureListener {
    private ListView list;

    public MyGestureListener(ListView list) {
        this.list = list;
    }

    // CONDITIONS ARE TYPICALLY VELOCITY OR DISTANCE

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        // if (INSERT_CONDITIONS_HERE)

        ltor=(e2.getX()-e1.getX()>DELTA_X);
        if (showDeleteButton(e1))
        {
            return true;
        }
        return super.onFling(e1, e2, velocityX, velocityY);
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2,
            float distanceX, float distanceY) {
        // TODO Auto-generated method stub
        return super.onScroll(e1, e2, distanceX, distanceY);
    }

    private boolean showDeleteButton(MotionEvent e1) {
        int pos = list.pointToPosition((int) e1.getX(), (int) e1.getY());
        return showDeleteButton(pos);
    }

    private boolean showDeleteButton(int pos) {

        View child = list.getChildAt(pos);
        if (child != null) {
            Button delete = (Button) child
                    .findViewById(R.id.b_edit_in_list);
            ViewSwitcher viewSwitcher = (ViewSwitcher) child
                    .findViewById(R.id.host_list_switcher);
            TextView hostName = (TextView) child
                    .findViewById(R.id.tv_host_name);
            if (delete != null) {
                    viewSwitcher.setInAnimation(AnimationUtils.loadAnimation(getActivity(), R.anim.slide_in_left));
                    viewSwitcher.setOutAnimation(AnimationUtils.loadAnimation(getActivity(), R.anim.slide_out_right));
                }

                viewSwitcher.showNext();
                // frameLayout.setVisibility(View.VISIBLE);
            }
            return true;
        }
        return false;
    }
}

在片段的onCreateView方法中,

GestureDetector gestureDetector = new GestureDetector(getActivity(),
            new MyGestureListener(hostList));
    hostList.setOnTouchListener(new View.OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            if (gestureDetector.onTouchEvent(event)) {
                return true;
            } else {
                return false;
            }

        }
    });

这对我有用.应该进一步完善它.