单击底部工作表片段中的回收站视图项时如何更新 LinearLayout？

Question

我有一个线性布局视图，当您单击该视图时，它会弹出一个底部对话框片段，该对话框包含一个回收器视图（包含来自数据库的数据），并且当您单击任何回收器视图项时底部的工作表对话框，它应该将其设置为选中并将线性布局更新为选定的回收器项目

这可能听起来令人困惑，所以我添加了我正在努力实现的目标的图片，以及我到目前为止编写的代码

• 从下图中线性布局被标记 (1)

• 单击线性布局 (1) 会打开带有回收器视图的底部工作表片段

• 单击任何回收站视图项应更新线性布局 (1) 与所选项目

AccountPickerDialog.java

public class AccountPickerDialog  extends BottomSheetDialogFragment {

    private RecyclerView mRecyclerView;
    private RecyclerView.Adapter mAdapter;
    private RecyclerView.LayoutManager mLayoutManager;

    private ArrayList<Wallet> userWalletList;

    boolean mIsRequest = false;
    private ShimmerFrameLayout mShimmerViewContainer;

    public AccountPickerDialog() {

    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.account_picker, container, false);

        mShimmerViewContainer = view.findViewById(R.id.shimmer_view_container);
        mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
        mRecyclerView.setHasFixedSize(true);
        mLayoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false);
        mRecyclerView.setLayoutManager(mLayoutManager);
//        mRecyclerView.addItemDecoration(new DividerItemDecoration(getContext(),
//                DividerItemDecoration.VERTICAL));

        //initializing the walletlist
        userWalletList = new ArrayList<>();
        loadUserWallets();

        return view;
    }

    private void loadUserWallets() {

        if(mIsRequest)
            return;
        mIsRequest= true;
        userWalletList.clear();

        User user = SharedPrefManager.getInstance(getContext()).getUser();
        StringRequest stringRequest = new StringRequest(Request.Method.GET, URLs.URL_USER_WALLET_LIST + user.getId(),
                response -> {
                    mIsRequest = false;
                    try {
                        //converting the string to json object
                        JSONObject object=new JSONObject(response);
                        //getting data array from json response object
                        JSONArray array=object.getJSONArray("data");

                        for(int i=0;i<array.length();i++) {

                            //getting wallet object from json array
                            JSONObject userWallets=array.getJSONObject(i);

                            //adding the wallet to wallet list
                            userWalletList.add(new Wallet(
                                    userWallets.getInt("id"),
                                    userWallets.getInt("user_id"),
                                    userWallets.getString("wallet_name"),
                                    userWallets.getInt("wallet_id"),
                                    userWallets.getInt("wallet_type"),
                                    userWallets.getDouble("balance")
                            ));
                        }

                        //creating adapter object and setting it to recyclerview
                        if (!isAdded()) return;
                        AccountPickerAdapter adapter = new AccountPickerAdapter(getActivity(),getChildFragmentManager(), userWalletList);
                        mRecyclerView.setAdapter(adapter);
                        // stop animating Shimmer and hide the layout
                        mShimmerViewContainer.stopShimmerAnimation();
                        mShimmerViewContainer.setVisibility(GONE);
//                            progressDialog.dismiss();
                        adapter.notifyDataSetChanged();
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                },
                error -> {
                    mIsRequest = false;
//                        progressDialog.dismiss();
//                        swipeRefreshLayout.setRefreshing(false);
                    Toast.makeText(getContext(),"No Internet Connection", Toast.LENGTH_SHORT).show();
                });

        //adding our stringrequest to queue
        Volley.newRequestQueue(getContext()).add(stringRequest);
    }

    @Override
    public void onResume() {
        super.onResume();
        mShimmerViewContainer.startShimmerAnimation();
    }

    @Override
    public void onPause() {
        mShimmerViewContainer.stopShimmerAnimation();
        super.onPause();
    }
}

AccountPickerAdapter.java

public class AccountPickerAdapter extends RecyclerView.Adapter<AccountPickerAdapter.DataObjectHolder>  {

    private static String TAG = AccountPickerAdapter.class.getSimpleName();

    private Context mCtx;
    private FragmentManager fragmentManager;

    private ArrayList<Wallet> userWalletList;
    private static AccountPickerAdapter.MyClickListener myClickListener;

    public AccountPickerAdapter(Context mCtx, FragmentManager fragmentManager, ArrayList<Wallet> userWalletList) {
        this.mCtx = mCtx;
        this.fragmentManager = fragmentManager;
        this.userWalletList = userWalletList;
    }

    public static class DataObjectHolder extends RecyclerView.ViewHolder {
        TextView walletname;
        TextView walletbalance;
        TextView walletid, destinationAccount;

        public DataObjectHolder(View itemView) {
            super(itemView);
            walletname = (TextView) itemView.findViewById(R.id.account_picker_name);
            walletbalance = (TextView) itemView.findViewById(R.id.account_picker_balance);
            walletid = (TextView) itemView.findViewById(R.id.wallet_id);
            destinationAccount = (TextView) itemView.findViewById(R.id.destination_account);
//            Log.i(LOG_TAG, "Adding Listener");
//            itemView.setOnClickListener(this);
        }

//        @Override
//        public void onClick(View v) {
//            myClickListener.onItemClick(getAdapterPosition(), v);
//        }
    }

//    public void setOnItemClickListener(MyClickListener myClickListener) {
//        this.myClickListener = myClickListener;
//    }



    @Override
    public AccountPickerAdapter.DataObjectHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mCtx).inflate(R.layout.account_picker_item, parent, false);
        final AccountPickerAdapter.DataObjectHolder dataObjectHolder = new AccountPickerAdapter.DataObjectHolder(view);

        return dataObjectHolder;
    }


    @Override
    public void onBindViewHolder(AccountPickerAdapter.DataObjectHolder holder, final int position) {

        DecimalFormat formatter = new DecimalFormat("###,###,###,###,###.##");
        formatter.setDecimalSeparatorAlwaysShown(true);
        formatter.setMinimumFractionDigits(2);
        Double doubleBalance = userWalletList.get(position).getBalance();
        String numberFormatBalance = formatter.format(doubleBalance);
        holder.walletname.setText(userWalletList.get(position).getWalletName());
        holder.walletbalance.setText(String.valueOf(numberFormatBalance));
        holder.walletid.setText(String.valueOf(userWalletList.get(position).getId()));
        holder.destinationAccount.setText(String.valueOf(userWalletList.get(position).getDestinationAccount()));

    }


    @Override
    public int getItemCount() {
        return userWalletList.size();
    }

    public interface MyClickListener {
        public void onItemClick(int position, View v);
    }
}

包含要更新的线性布局的片段

public class ReceivePageDialog extends BottomSheetDialogFragment {

    View selectAccount; //The layout view to be updated

    public ReceivePageDialog() {

    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.receive_page, container, false);

        selectAccount = view.findViewById(R.id.source_account_spinner); //Linear Layout view to be updated
        selectAccount.setOnClickListener(v -> {
            AccountPickerDialog accountPickerDialog = new AccountPickerDialog(); //This launches the wallet picker bottom sheet
            accountPickerDialog.show(getChildFragmentManager(), accountPickerDialog.getTag());
        });

        return view;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        BottomSheetDialog bottomSheetDialog=(BottomSheetDialog)super.onCreateDialog(savedInstanceState);
        bottomSheetDialog.setOnShowListener(dialog -> {
            BottomSheetDialog dialogc = (BottomSheetDialog) dialog;
            FrameLayout bottomSheet =  dialogc.findViewById(R.id.design_bottom_sheet);

            BottomSheetBehavior bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
            bottomSheetBehavior.setPeekHeight(Resources.getSystem().getDisplayMetrics().heightPixels);
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
        });
        return bottomSheetDialog;
    }
}

问题

是否可以通过选择底部工作表项来更新线性布局？如果是，我该如何实现？

Answer 1

您应该将Listener 初始化为ViewHolder

public class AccountPickerAdapter extends RecyclerView.Adapter<AccountPickerAdapter.DataObjectHolder>  {

    private static String TAG = AccountPickerAdapter.class.getSimpleName();

    private Context mCtx;
    private FragmentManager fragmentManager;

    private ArrayList<Wallet> userWalletList;
    private AccountPickerAdapter.MyClickListener myClickListener;

    public AccountPickerAdapter(Context mCtx, FragmentManager fragmentManager, ArrayList<Wallet> userWalletList) {
        this.mCtx = mCtx;
        this.fragmentManager = fragmentManager;
        this.userWalletList = userWalletList;
    }

    public Wallet getItemByPos(int pos) {
        return userWalletList.get(pos);
    }

    public static class DataObjectHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView walletname;
        TextView walletbalance;
        TextView walletid, destinationAccount;
        private AccountPickerAdapter.MyClickListener myClickListener;

        public DataObjectHolder(View itemView, AccountPickerAdapter.MyClickListener listener;) {
            super(itemView);
            walletname = (TextView) itemView.findViewById(R.id.account_picker_name);
            walletbalance = (TextView) itemView.findViewById(R.id.account_picker_balance);
            walletid = (TextView) itemView.findViewById(R.id.wallet_id);
            destinationAccount = (TextView) itemView.findViewById(R.id.destination_account);
            itemView.setOnClickListener(this);
            myClickListener = listener;
        }

        @Override
        public void onClick(View v) {
            myClickListener.onItemClick(getAdapterPosition(), v);
        }
    }

    public void setOnItemClickListener(MyClickListener myClickListener) {
        this.myClickListener = myClickListener;
    }



    @Override
    public AccountPickerAdapter.DataObjectHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mCtx).inflate(R.layout.account_picker_item, parent, false);
        final AccountPickerAdapter.DataObjectHolder dataObjectHolder = new AccountPickerAdapter.DataObjectHolder(view);

        return dataObjectHolder;
    }


    @Override
    public void onBindViewHolder(AccountPickerAdapter.DataObjectHolder holder, final int position) {

        DecimalFormat formatter = new DecimalFormat("###,###,###,###,###.##");
        formatter.setDecimalSeparatorAlwaysShown(true);
        formatter.setMinimumFractionDigits(2);
        Double doubleBalance = userWalletList.get(position).getBalance();
        String numberFormatBalance = formatter.format(doubleBalance);
        holder.walletname.setText(userWalletList.get(position).getWalletName());
        holder.walletbalance.setText(String.valueOf(numberFormatBalance));
        holder.walletid.setText(String.valueOf(userWalletList.get(position).getId()));
        holder.destinationAccount.setText(String.valueOf(userWalletList.get(position).getDestinationAccount()));

    }


    @Override
    public int getItemCount() {
        return userWalletList.size();
    }

    public interface MyClickListener {
        public void onItemClick(int position, View v);
    }
}

public class AccountPickerDialog  extends BottomSheetDialogFragment implements AccountPickerAdapter.MyClickListener {
        @Override
        public void onItemClick(int position, View v) {
            Wallet wallet = mAdapter.getItemByPos(position)
            View view = ((ReceivePageDialog)getParentFragmen()). selectAccount;
            // find child view and update here
        }
}

收到回复时初始化mAdapter

mAdapter = new AccountPickerAdapter(getActivity(),getChildFragmentManager(), userWalletList);
                        mRecyclerView.setAdapter(adapter);
mAdapter.setOnItemClickListener(AccountPickerDialog.this)