android-RecyclerView每秒更新一次，并有一个longPressListener
我有一个android-RecyclerView每秒更新一次，并有一个longPressListener,android,android-recyclerview,notifydatasetchanged,long-press,Android,Android Recyclerview,Notifydatasetchanged,Long Press,我有一个RecyclerView，每个列表项中都有一个计数器，当调用计数器回调时，它会更新相关字段并调用nottifyDataSetChanged 它工作得很好，但问题是，我也有一个很长的新闻侦听器连接到它，因为数据是更新的，而用户按项目，新闻是丢失的 我怎么办 更新程序代码： public void setCountDown(int countDown){ mCountDown = countDown; notifyDataSetChanged(); } holder
RecyclerViewnottifyDataSetChangedpublic void setCountDown(int countDown){
mCountDown = countDown;
notifyDataSetChanged();
}
holder.container.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
FragmentManager fm = ((AppCompatActivity)activity).getSupportFragmentManager();
EditAccountFragment editAccountFragmentDialog = EditAccountFragment.newInstance(_id);
editAccountFragmentDialog.show(fm, "fragment_edit_account");
return false;
}
});
public void setCountDown(int countDown){
mCountDown = countDown;
notifyDataSetChanged();
}
holder.container.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
FragmentManager fm = ((AppCompatActivity)activity).getSupportFragmentManager();
EditAccountFragment editAccountFragmentDialog = EditAccountFragment.newInstance(_id);
editAccountFragmentDialog.show(fm, "fragment_edit_account");
return false;
}
});
public class AccountAdapter extends RecyclerView.Adapter<AccountAdapter.ItemViewHolder> {
private static final String TAG = "ITEM_ADAPTER";
private Cursor itemCursor;
private Activity activity;
private ItemColumnIds feedColumnIds;
private int mCountDown;
private boolean ignoreDatasetChange = false;
/**
* initilaizer for recycler view adapter, takes in activity although better way is to handle
* activity related tasks within activiyt, but this is just done to speed up the overall process
* @param activity
*/
public AccountAdapter(Activity activity){
this.activity = activity;
}
@Override
public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(activity).inflate(R.layout.account_item,
parent, false);
feedColumnIds = new ItemColumnIds();
if (itemCursor != null){
// initilize column indices information
feedColumnIds.colId = itemCursor.getColumnIndex(
AuthContract.AccountEntry._ID);
feedColumnIds.colAcctId = itemCursor.getColumnIndex(
AuthContract.AccountEntry.COLUMN_USERNAME);
feedColumnIds.colPin = itemCursor.getColumnIndex(
AuthContract.AccountEntry.COLUMN_PIN);
feedColumnIds.colIssuer = itemCursor.getColumnIndex(
AuthContract.AccountEntry.COLUMN_ISSUER);
}
return new ItemViewHolder(view);
}
@Override
public void onBindViewHolder(final ItemViewHolder holder, int position) {
if(itemCursor == null)
return;
if(!itemCursor.moveToPosition(position))
return;
//get values from cursor
String pin = itemCursor.getString(feedColumnIds.colPin);
String email = itemCursor.getString(feedColumnIds.colAcctId);
String issuer = itemCursor.getString(feedColumnIds.colIssuer);
final long _id = itemCursor.getLong(feedColumnIds.colId);
//set view values
holder.tvEmail.setText(email);
holder.tvPin.setText(pin);
holder.tvIssuer.setText(issuer);
holder.apCountDown.setProgress(mCountDown);
holder.container.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String pin = holder.tvPin.getText().toString();
ClipboardManager clipboard = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Secret Key", pin);
clipboard.setPrimaryClip(clip);
Toast.makeText(activity, "OTP code "+ pin +" copied to clipboard", Toast.LENGTH_SHORT).show();
}
});
holder.container.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
FragmentManager fm = ((AppCompatActivity)activity).getSupportFragmentManager();
EditAccountFragment editAccountFragmentDialog = EditAccountFragment.newInstance(_id);
editAccountFragmentDialog.show(fm, "fragment_edit_account");
return false;
}
});
}
@Override
public int getItemCount() {
if(itemCursor == null)
return 0;
return itemCursor.getCount();
}
/**
* close previurous cursor if any and replace that with the new on from host class
* @param cursor
*/
public void swapCursor(Cursor cursor) {
if(itemCursor != null) {
itemCursor.close();
itemCursor = null;
}
itemCursor = cursor;
notifyDataSetChanged();
}
public void setCountDown(int countDown){
mCountDown = countDown;
if(!ignoreDatasetChange)
notifyDataSetChanged();
}
/**
* View golder for auction item entry
*/
public class ItemViewHolder extends RecyclerView.ViewHolder {
TextView tvEmail;
TextView tvPin;
TextView tvIssuer;
// TextView tvCountDown;
ArcProgress apCountDown;
View container;
public ItemViewHolder(View itemView) {
super(itemView);
tvEmail = (TextView) itemView.findViewById(R.id.tv_email);
tvPin = (TextView) itemView.findViewById(R.id.tv_pin);
tvIssuer = (TextView) itemView.findViewById(R.id.tv_issuer);
apCountDown = (ArcProgress) itemView.findViewById(R.id.arc_progress);
container = itemView.findViewById(R.id.container);
}
}
/**
* databse column id holder for auction item
*/
class ItemColumnIds {
public int colId;
public int colPin;
public int colAcctId;
public int colIssuer;
}
}
> p>我认为当用户触摸视图时，应该考虑停止快速刷新。 要做到这一点，您只需实现
onTouchEvent...
if (event.getAction()==MotionEvent.ACTION_DOWN) isUserTouching = true;
if (event.getAction()==MotionEvent.ACTION_UP) isUserTouching = false;
...
public void setCountDown(int countDown){
if (!isUserTouching) {
mCountDown = countDown;
notifyDataSetChanged();
}
}
<>我想你应该考虑在用户触摸视图时停止快速刷新。 要做到这一点，您只需实现
onTouchEvent...
if (event.getAction()==MotionEvent.ACTION_DOWN) isUserTouching = true;
if (event.getAction()==MotionEvent.ACTION_UP) isUserTouching = false;
...