[英]Swip to delete though ItemTouchHelper RecyclerView?
I am trying to implement swip-to-delete RecyclerView
with ItemTouchHelper onSwiped method. 我正在尝试使用ItemTouchHelper onSwiped方法实现刷卡删除
RecyclerView
。 problem is, it gives us adapter position. 问题是,它给了我们适配器位置。 but how to retrieve items's actual sql id from cursor loader?
但是如何从游标加载器中检索项目的实际SQL ID? I am using
CursorLoader
and ContentProvider
. 我正在使用
CursorLoader
和ContentProvider
。 kindly guide 友善的指导
public class ActivityTaskList extends Activity implements LoaderManager.LoaderCallbacks<Cursor> {
......
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
int pos1 = viewHolder.getAdapterPosition();
deleteData(pos1);
Log.d(TAG,"onSwiped");
};
private void deleteData(long adapterPosition) {
Uri uri = Uri.parse(TaskProviderP.CONTENT_URI + "/"+ (int)adapterPosition);
getContentResolver().delete(uri, null,null);
Log.d(TAG,"deleteData");
}
@Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
Log.d(TAG, "onCreateLoader");
String[] projection = { TaskTableP.COLUMN_ID, TaskTableP.COLUMN_NAME,TaskTableP.COLUMN_DESCRIPTION };
CursorLoader cursorLoader = new CursorLoader(this,
TaskProviderP.CONTENT_URI, projection, null, null, null);
return cursorLoader;
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
Log.d(TAG, "onLoadFinished");
taskAdapterP.setCursor(cursor);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
Log.d(TAG, "onLoaderReset");
taskAdapterP.setCursor(null);
}
}
Attached my Adapter class for reference. 附上我的Adapter类以供参考。 I think Nilesh's solution needs some kind of list or array.
我认为Nilesh的解决方案需要某种列表或数组。 i am new bee and confuse in this.
我是新蜜蜂,对此感到困惑。
public class TaskAdapterP extends RecyclerView.Adapter<TaskAdapterP.TViewHolder> {
private Context context;
public TaskAdapterP(Context context) {
this.context = context;
setHasStableIds(true);
}
private Cursor cursor;
@Override
public long getItemId(int position) {
return super.getItemId(position);
}
public void setCursor(Cursor cursor) {
this.cursor = cursor;
Log.d(TAG, "setCursor");
notifyDataSetChanged();
}
@Override
public TViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View view = layoutInflater.inflate(R.layout.one_task_row, parent, false);
Log.d(TAG, "onCreateViewHolder");
return new TViewHolder(view);
}
@Override
public void onBindViewHolder(TViewHolder holder, int position) {
Log.d(TAG, "onBindViewHolder");
if (cursor != null) {
cursor.moveToPosition(position);
holder.vhTask_Title.setText(cursor.getString(cursor.getColumnIndexOrThrow(TaskTableP.COLUMN_NAME)).replaceAll("\\<[^>]*>", ""));
holder.vhTask_Description.setText(cursor.getString(cursor.getColumnIndexOrThrow(TaskTableP.COLUMN_DESCRIPTION)));
}
}
@Override
public int getItemCount() {
Log.d(TAG, "getItemCount");
return cursor == null ? 0 : cursor.getCount();
}
class TViewHolder extends RecyclerView.ViewHolder {
TextView vhTask_Title, vhTask_Description;
public TViewHolder(View itemView) {
super(itemView);
Log.d(TAG, "TViewHolder Constructor");
vhTask_Title = (TextView) itemView.findViewById(R.id.textview_task_name);
vhTask_Description = (TextView) itemView.findViewById(R.id.textview_task_description);
}
}
}
One Solution is write getID
method in adpter that will return
id of supplied positioin 一种解决方案是在adpter中写入
getID
方法,该方法将return
提供的位置信息的 ID。
public int getID(int positioin) {
return visitingCards.get(positioin).getNo();
}
And call getID
using adapter object like this 然后使用这样的适配器对象调用
getID
mAdapter.getID(viewHolder.getAdapterPosition())
Update for your adapter you can do like 您可以为您的适配器更新
public int getID(int positioin) {
return cursor.moveToPosition(position).cursor.getXXX(YOUR_COLUM_NAME);// so that will return id
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.