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我正在做一个ToDo列表应用程序，并且在测试它时，出于某种原因，每当我尝试向下滚动时，项目之间会形成巨大的空白。无论何时拖放项目，总是会发生这种情况，但我看不到我的ItemTouchHelper适配器和回调类出现任何错误。如果你能帮助我，那将是非常棒的。RecyclerView项目向下滚动时出现大的间隙形式
前： 
后： 
RecyclerAdapter.java
public class RecyclerAdapter extends
RecyclerView.Adapter<RecyclerAdapter.RecyclerVH> implements ItemTouchHelperAdapter{
private LayoutInflater layoutInflater;
ArrayList<Info> data;
Context context;
public RecyclerAdapter(Context context) {
layoutInflater = LayoutInflater.from(context);
this.context = context;
}
public void setData(ArrayList<Info> data) {
this.data = data;
notifyDataSetChanged();
}
@Override
public RecyclerVH onCreateViewHolder(ViewGroup viewGroup, int position) {
View view = layoutInflater.inflate(R.layout.custom_row, viewGroup, false);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("R.A onClick Owen", "onClick method triggered");
}
});
RecyclerVH recyclerVH = new RecyclerVH(view);
return recyclerVH;
}
@Override
public void onBindViewHolder(RecyclerVH recyclerVH, int position) {
Log.d("RecyclerView", "onBindVH called: " + position);
final Info currentObject = data.get(position);
// Current Info object retrieved for current RecyclerView item - USED FOR DELETE
recyclerVH.listTitle.setText(currentObject.title);
recyclerVH.listContent.setText(currentObject.content);
/*recyclerVH.listTitle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Open new Activity containing note content
Toast.makeText(this, "Opening: " + currentObject.title, Toast.LENGTH_LONG).show();
}
});*/
}
public void deleteItem(int position) {
DBInfo dbInfo = new DBInfo(context);
dbInfo.deleteNote(data.get(position));
// Deletes RV item/position's Info object
data.remove(position);
// Removes Info object at specified position
notifyItemRemoved(position);
// Notifies the RV that item has been removed
}
@Override
public int getItemCount() {
return data.size();
}
// This is where the Swipe and Drag-And-Drog methods come into place
@Override
public boolean onItemMove(int fromPosition, int toPosition) {
// Swapping positions
// ATTEMPT TO UNDERSTAND WHAT IS GOING ON HERE
Collections.swap(data, fromPosition, toPosition);
notifyItemMoved(fromPosition, toPosition);
return true;
}
@Override
public void onItemDismiss(int position) {
// Deleting item from RV and DB
deleteItem(position);
}
class RecyclerVH extends RecyclerView.ViewHolder implements View.OnClickListener{
// OnClickListener is implemented here
// Can also be added at onBindViewHolder above
TextView listTitle, listContent;
public RecyclerVH(View itemView) {
super(itemView);
listTitle = (TextView) itemView.findViewById(R.id.title);
listContent = (TextView) itemView.findViewById(R.id.content);
listTitle.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Toast.makeText(context, "Opening: Note" + getLayoutPosition(), Toast.LENGTH_SHORT).show();
// PS NEVER ADD listTitle VARIABLE AS PUBLIC VARIABLE ABOVE WHICH IS GIVEN VALUE AT ONBINDVH
// THIS IS BECAUSE THE VALUE WILL CHANGE IF ITEM IS ADDED OR DELETED
}
}
}
activity_main.xml中
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fab="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical"
android:weightSum="1">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/rounded_corners" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerList"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.melnykov.fab.FloatingActionButton
android:id="@+id/fab_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_marginBottom="16dp"
android:layout_marginRight="16dp"
android:layout_marginEnd="16dp"
android:gravity="bottom|end"
android:onClick="addNote"
android:src="@drawable/fab_ic_add"
fab:fab_colorNormal="@color/colorPrimary"
fab:fab_colorPressed="@color/colorPrimaryDark"
fab:fab_colorRipple="@color/colorPrimaryDark" />
</RelativeLayout>
</FrameLayout>
</LinearLayout>
custom_row.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/main"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:padding="8dp"
android:text="@string/test"
android:textSize="18sp"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/main"
android:paddingLeft="8dp">
<TextView
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/test"
android:textSize="15sp" />
</LinearLayout>
</RelativeLayout>
非常感谢任何能够帮助我的人。我在打字时拉出头发。
编辑：我已确认它不是我的ItemTouchHelper类是问题所在。 （尝试运行时没有被调用，问题仍然存在。） 此外，似乎当显示对话框并且键盘出现时，后台的RecyclerView会自行解决问题。删除对话框后，问题重复（即滚动放置项目之间的巨大空间）
这可能与您的代码无关。这是关于你的布局。显示您在此使用的布局。 –
@DougStevenson尽管我很怀疑这是我的布局，但在发生此问题之前，我根本没有触及它们。不过，我仍然会感激您提供的任何见解。 –
也许这是原因http://stackoverflow.com/questions/35728179/recyclerview-items-with-big-empty-space-after-23-2-0 – Luksprog