android - 在 RecyclerView 中获取 EditText 的焦点

Question

我正在实现一个应用程序，用户可以在其中存储借记卡，稍后他们只需输入同一张卡的 CVV 号码即可使用它。我已将 RecyclerView 用于用户存储的所有项目(借记卡)。一切正常， View 渲染一切正常，我使用 LinearLayoutManager 来显示水平滚动。

现在我面临的问题是每当我尝试输入任何卡片的 CVV 时，只要我点击它， View 就会转移到存储卡片列表的最后一项，所以如果我有三张卡片存储在我的列表中，我尝试为第一个输入 CVV， View 直接转移到第三张卡片，但焦点仍然在第一张卡片 EditText 上。我不知道这是怎么回事。我正在为此共享一些代码部分。

设置适配器和定义水平滚动:-

  recyclerAdapter = new RecyclerStoredCardAdapter(mContext, storedCards);
                LinearLayoutManager layoutManager
                        = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
                storedCardListRecycler.setLayoutManager(layoutManager);
                storedCardListRecycler.setVisibility(View.VISIBLE);
                storedCardListRecycler.setAdapter(recyclerAdapter);

与此共享屏幕截图，以便清楚。任何帮助将不胜感激。谢谢。

Answer 1

我使用 ListView 而不是 RecyclerView

但是你也可以用 RecyclerView 来做。

这是我用过的类演示。

SettingItemListViewAdapter.java

---

/**
 * Created by vishalchhodwani on 18/10/16.
 */
public class SettingItemListViewAdapter extends BaseAdapter {

    private final String TAG = "SettingItemListViewAdapter";

    Context context;
    List<SettingListViewItem> settingItemList;
    OnMyClickListeners onMyClickListeners;

    MyDatabaseAdapter myDatabaseAdapter;

    public SettingItemListViewAdapter(Context context, List<SettingListViewItem> settingItemList) {
        this.context = context;
        this.settingItemList = settingItemList;
        myDatabaseAdapter = new MyDatabaseAdapter(context);
    }

    public void setMyClickListener(OnMyClickListeners onMyClickListeners) {

        this.onMyClickListeners = onMyClickListeners;
    }

    @Override
    public int getCount() {
        return settingItemList.size();
    }

    @Override
    public Object getItem(int position) {
        return settingItemList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        final ViewHolder holder;

        if (convertView == null) {
            holder = new ViewHolder();

            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.setting_listview_item, parent, false);
            holder.settingListViewForm = (RelativeLayout) convertView.findViewById(R.id.settingListViewItem_form1);
            holder.vrijeTekst = (EditText) convertView.findViewById(R.id.settingListViewItem_ed_virje_row1);
            holder.kenteken = (EditText) convertView.findViewById(R.id.settingListViewItem_ed_kenketen_row1);

            holder.checkRow = (ImageView) convertView.findViewById(R.id.settingListViewItem_check_row1);
            holder.deleteRow = (ImageView) convertView.findViewById(R.id.settingListViewItem_deleteRow);

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.vrijeTekst.setText(settingItemList.get(position).getItemVrijeTekst());
        holder.kenteken.setText(settingItemList.get(position).getItemKenteken());


        boolean isSelected = settingItemList.get(position).isItemSelected();
        holder.checkRow.setImageResource(isSelected ? R.drawable.checked : R.drawable.uncheked);


        holder.vrijeTekst.setTag(position);
        holder.vrijeTekst.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            public void onFocusChange(final View v, boolean hasFocus) {
                try {
                    if (!hasFocus) {
                        if (settingItemList.size() > 0) {
                            int position = (int) v.getTag();
                            EditText Caption = (EditText) v;
                            settingItemList.get(position).setItemVrijeTekst(Caption.getText().toString());
                        }

                    } else {
                        EditText caption = (EditText) v;
                        caption.setCursorVisible(true);

                    }
                } catch (Exception ex) {
                    ex.printStackTrace();
                }


            }
        });


        holder.kenteken.setTag(position);
        holder.kenteken.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            public void onFocusChange(final View v, boolean hasFocus) {

                try {
                    if (!hasFocus) {
                        if (settingItemList.size() > 0) {
                            int position = (int) v.getTag();
                            EditText Caption = (EditText) v;
                            settingItemList.get(position).setItemKenteken(Caption.getText().toString());
                        }
                    } else {
                        EditText caption = (EditText) v;
                        caption.setCursorVisible(true);
                    }
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });

        holder.checkRow.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (myDatabaseAdapter.isAvailableInTable(settingItemList.get(position).getItemId()))
                    onMyClickListeners.onSelectButtonClicked(position);
            }
        });

        holder.deleteRow.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                onMyClickListeners.onDeleteItemButtonClicked(position);
            }
        });


        if (getCount() == position + 1) {
            holder.vrijeTekst.requestFocus();
            holder.vrijeTekst.performClick();
        }

        return convertView;
    }

    public static class ViewHolder {
        RelativeLayout settingListViewForm;
        EditText vrijeTekst, kenteken;
        ImageView checkRow, deleteRow;
    }
}

SettingN_New.java(是一个 fragment )

---

public class SettingN_New extends Fragment implements OnClickListener, OnMyClickListeners {

    private final String TAG = "SettingN_New";

    Context context;

    private TextView tv_demo;
    ToggleButton togglebtn_save;
    Button btn_save, btn_add;

    ListView settingItemListView;
    List<SettingListViewItem> settingItemList;
    SettingItemListViewAdapter settingItemListViewAdapter;

    MyDatabaseAdapter myDatabaseAdapter;

    TinyDB loginpref;

    boolean isNewRowAdded = true;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        //This line of code will stay focus on selected edittext in list
        getActivity().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST);

        ActionBar bar = getActivity().getActionBar();
        bar.show();

        View rootView = inflater.inflate(R.layout.setting_new, container, false);

        initializeViews(rootView);

        setUI();

        getListOfItems();

        return rootView;
    }

    private void setUI() {

        try {
            if (loginpref.getBoolean(ConstantLib.PREF_AUTO_LOGIN)) {
                togglebtn_save.setChecked(true);
            } else {
                togglebtn_save.setChecked(false);
            }
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
    }

    private void initializeViews(View rootView) {
        context = getActivity();

        LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View headerView = inflater.inflate(R.layout.setting_listview_header, null);

        btn_save = (Button) headerView.findViewById(R.id.btn_save);
        btn_add = (Button) headerView.findViewById(R.id.btn_add);
        togglebtn_save = (ToggleButton) headerView.findViewById(R.id.togglebtn_save);
        tv_demo = (TextView) headerView.findViewById(R.id.tv_demo);

        settingItemList = new ArrayList<>();
        settingItemListView = (ListView) rootView.findViewById(R.id.setting_listView);
        settingItemListView.setClickable(true);
        settingItemListView.refreshDrawableState();
        settingItemListView.addHeaderView(headerView);
        settingItemListView.setItemsCanFocus(true);
        settingItemListViewAdapter = new SettingItemListViewAdapter(context, settingItemList);
        settingItemListViewAdapter.setMyClickListener(this);
        settingItemListView.setAdapter(settingItemListViewAdapter);


        myDatabaseAdapter = new MyDatabaseAdapter(context);
        loginpref = new TinyDB(getActivity());

        btn_save.setOnClickListener(this);
        btn_add.setOnClickListener(this);
        tv_demo.setOnClickListener(this);

        togglebtn_save.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView,
                                         boolean isChecked) {
                // TODO Auto-generated method stub

                loginpref.putBoolean(ConstantLib.PREF_AUTO_LOGIN, isChecked);
            }
        });
    }


    private void getListOfItems() {

        settingItemList.clear();
        settingItemList.addAll(myDatabaseAdapter.getAllData());

        if (settingItemList.size() == 0) {
            isNewRowAdded = true;
            SettingListViewItem settingListViewItem = new SettingListViewItem();
            settingListViewItem.setItemId(settingItemList.size() + "");
            settingListViewItem.setItemVrijeTekst("");
            settingListViewItem.setItemKenteken("");
            settingListViewItem.setItemSelected(false);

            settingItemList.add(settingListViewItem);
        } else {
            isNewRowAdded = false;
        }
        notifyDataSetChanged();
    }

    private void hideKeyboard() {
        // Check if no view has focus:
        View view = getActivity().getCurrentFocus();
        if (view != null) {
            InputMethodManager inputManager = (InputMethodManager) getActivity()
                    .getSystemService(Context.INPUT_METHOD_SERVICE);
            inputManager.hideSoftInputFromWindow(view.getWindowToken(),
                    InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_save:

                clearFocus();

                hideKeyboard();

                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {

                        if (isValidationSuccess())
                            saveAllData();
                    }
                }, 200);
                break;
            case R.id.btn_add:
                addAnotherRow();
                break;
            case R.id.tv_demo:
                clickedOnTvDemo();
                break;
        }
    }

    private void clickedOnTvDemo() {

        try {
            Intent i = new Intent(getActivity(), Setting_exp_activity.class);
            startActivity(i);

        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
    }

    private boolean isValidationSuccess() {
        Log.e(TAG, "isValidationSuccess() called : settingItemList.size()==" + settingItemList.size());

        for (int i = 0; i < settingItemList.size(); i++) {
            if (settingItemList.get(i).getItemVrijeTekst().equalsIgnoreCase("") || settingItemList.get(i).getItemKenteken().equalsIgnoreCase("")) {
                showToast("Veld mag niet leeg zijn");// showToast("Fields should not be empty!!");
                return false;
            }
        }

        return true;
    }

    private void saveAllData() {
        Log.e(TAG, "saveAllData() called");

        myDatabaseAdapter.clearTable();

        for (int i = 0; i < settingItemList.size(); i++) {
            isNewRowAdded = false;
            SettingListViewItem settingListViewItem = new SettingListViewItem();
            settingListViewItem.setItemId(i + "");
            settingListViewItem.setItemVrijeTekst(settingItemList.get(i).getItemVrijeTekst());
            settingListViewItem.setItemKenteken(settingItemList.get(i).getItemKenteken());
            settingListViewItem.setItemSelected(settingItemList.get(i).isItemSelected());

            myDatabaseAdapter.insertDataToTable(settingListViewItem);
        }

        DialogUtils.showInfoDialog(getActivity(),
                "Instellingen opgeslagen");
    }

    private void addAnotherRow() {
        Log.e(TAG, "addAnotherRow() called");
        if (settingItemList.size() > 0 && !isNewRowAdded) {
            if (!settingItemList.get(settingItemList.size() - 1).getItemVrijeTekst().equalsIgnoreCase("") && !settingItemList.get(settingItemList.size() - 1).getItemKenteken().equalsIgnoreCase("")) {
                isNewRowAdded = true;
                Log.e(TAG, "addAnotherRow() called check 1");

                SettingListViewItem settingListViewItem = new SettingListViewItem();
                settingListViewItem.setItemId(settingItemList.size() + "");
                settingListViewItem.setItemVrijeTekst("");
                settingListViewItem.setItemKenteken("");
                settingListViewItem.setItemSelected(false);
                settingItemList.add(settingListViewItem);

                notifyDataSetChanged();
            } else {
                Log.e(TAG, "addAnotherRow() called check 2");
                showToast("Al toegevoegd");// showToast("Already Added!!");
            }
        } else {
            if (!isNewRowAdded) {
                isNewRowAdded = true;
                Log.e(TAG, "addAnotherRow() called check 3");
                SettingListViewItem settingListViewItem = new SettingListViewItem();
                settingListViewItem.setItemId("0");
                settingListViewItem.setItemVrijeTekst("");
                settingListViewItem.setItemKenteken("");
                settingListViewItem.setItemSelected(false);
                settingItemList.add(settingListViewItem);

                notifyDataSetChanged();
            } else {
                Log.e(TAG, "addAnotherRow() called check 4");
                showToast("Al toegevoegd");// showToast("Already Added!!");
            }
        }

        settingItemListView.setSelection(settingItemList.size());

        Log.e(TAG, "addAnotherRow() called check 5");
        Log.e(TAG, "after settingItemList.size()==" + settingItemList.size());
    }

    @Override
    public void onDeleteItemButtonClicked(int position) {

        Log.e(TAG, "onDeleteItemButtonClicked() position==" + position);

        if (myDatabaseAdapter.getAllData().size() > 0)
            showAlertForDeleteItem(position);
        else
            showToast("Er is geen item te verwijderen"); //  showToast("No item to Delete");
    }

    @Override
    public void onSelectButtonClicked(int position) {
        Log.e(TAG, "onSelectButtonClicked() position==" + position);

        for (int i = 0; i < settingItemList.size(); i++) {
            Log.e(TAG, "onSelectButtonClicked() called check 3");
            settingItemList.get(i).setItemSelected(false);
        }

        settingItemList.get(position).setItemSelected(true);

        notifyDataSetChanged();
    }

    private void showAlertForDeleteItem(final int position) {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
        alertDialog.setMessage("Weet je zeker dat je dit item wilt wissen?");//alertDialog.setMessage("Are you sure you want to delete this item?");

        // ja==yes
        alertDialog.setPositiveButton("Ja", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {

                myDatabaseAdapter.deleteTableRow(settingItemList.get(position).getItemId() + "");
                settingItemList.remove(position);
                settingItemListViewAdapter.notifyDataSetChanged();

                if (settingItemList.size() == position + 1) {
                    isNewRowAdded = false;
                }

                if (settingItemList.size() == 0) {
                    isNewRowAdded = false;
                    addAnotherRow();
                }
            }
        });

        //Annuleer==cancel
        alertDialog.setNegativeButton("Annuleer", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {


            }
        });

        alertDialog.show();
    }

    private void notifyDataSetChanged() {
        settingItemListViewAdapter.notifyDataSetChanged();
    }

    private void showToast(String message) {
        Toast.makeText(context, message, Toast.LENGTH_LONG).show();
    }

    public void clearFocus() {
        if (getActivity().getWindow().getCurrentFocus() != null) {
            getActivity().getWindow().getCurrentFocus().clearFocus();
        }
    }
}

我正在给你我的整个类(class)。为什么？因为它会让您更加了解我如何将它与 ListView 一起使用。

测试它并告诉我。 :)

注意事项

• 这行代码非常重要 - getActivity().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_MASK_ADJUST);