How to update the recyclerView after updating data via dialog

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How to update the recyclerView after updating data via dialog

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#1 by (3 votes)
#2 by (1 votes)

1

My application works something like this.

Within a fragment I have a RecyclerView composed of cardviews, fed by a database.

On each card, there is an edit button (imageView) that opens a dialog (alertDialog) with a form. editing. Everything is working, except the reclyclerview update.

Below the recyclerview adapter

import android.content.Context;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SwitchCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AutoCompleteTextView;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast; 

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.RecyclerViewHolder> {

private Context context;
private List<RunData> dataList = new ArrayList<>();
private LayoutInflater inflater;
private RunDbHelper runDbHelper; // db model helper class 

RecyclerViewAdapter(Context context, List<RunData> dataList1) {

    this.context = context;
    this.dataList = dataList1;
    this.runDbHelper = RunDbHelper.getInstance(this.context);
    inflater = LayoutInflater.from(context);
}

@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View inflateView = inflater.inflate(R.layout.fragment_recycler_row, parent, false);
    return new RecyclerViewHolder(inflateView);
}

// Parse data from dataList to holder and setup all Views
// Here is part of the magic
@Override
public void onBindViewHolder(final RecyclerViewHolder holder, final int position) {

    holder.runID.setText(dataList.get(position).run_id);
    holder.collectAddress.setText(dataList.get(position).collect_address);
    holder.collectPerson.setText(dataList.get(position).collect_person);
    holder.runParcel.setText(dataList.get(position).run_parcel);
    holder.deliveryAddress.setText(dataList.get(position).delivery_address);
    holder.deliveryPerson.setText(dataList.get(position).delivery_person);        

    holder.ivEdit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            RunData runData = new RunData(); // helper class to deal with one data row mirrors model
            runData.collect_address = holder.collectAddress.getText().toString();
            runData.collect_person = holder.collectPerson.getText().toString();
            runData.delivery_address = holder.deliveryAddress.getText().toString();
            runData.delivery_person = holder.deliveryPerson.getText().toString();
            runData.run_id = holder.runID.getText().toString();
            dialogEditRun(runData);
        }

    });

}

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

public void dialogEditRun(RunData runData) {

    // Get the Activity for layout inflater as this dialog runs inside a fragment
    LayoutInflater inflater = LayoutInflater.from(context);
    final View inflaterView = inflater.inflate(R.layout.dialog_edit_run, null);
    // Data entry field objects
    final EditText runParcelEditText = (EditText) inflaterView.findViewById(R.id.editRunParcel);
    final AutoCompleteTextView collectAddressACTV = (AutoCompleteTextView) inflaterView.findViewById(R.id.actvEditCollectAddress);
    final EditText collectPersonEditText = (EditText) inflaterView.findViewById(R.id.editCollectPerson);
    final AutoCompleteTextView deliveryAddressACTV = (AutoCompleteTextView) inflaterView.findViewById(R.id.actvEditDeliveryAddress);
    final EditText deliveryPersonEditText = (EditText) inflaterView.findViewById(R.id.editDeliveryPerson);
    final String mRunID;
    // get values from database and set edit values
    runParcelEditText.setText(runData.run_parcel);
    collectAddressACTV.setText(runData.collect_address);
    deliveryAddressACTV.setText(runData.delivery_address);
    collectPersonEditText.setText(runData.collect_person);
    deliveryPersonEditText.setText(runData.delivery_person);
    mRunID = runData.run_id;

    // Dialog Builder
    AlertDialog.Builder editRunDialog = new AlertDialog.Builder(context);
    editRunDialog.setTitle(R.string.dialog_update_run_title)
        .setView(inflaterView);

    editRunDialog.setPositiveButton(R.string.button_positive, new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int id) {

            RunData runData = new RunData();
            runData.run_parcel = getStringOrEmpty(runParcelEditText);
            runData.collect_address = getStringOrEmpty(collectAddressACTV);
            runData.delivery_address = getStringOrEmpty(deliveryAddressACTV);
            runData.collect_person = getStringOrEmpty(collectPersonEditText);
            runData.delivery_person = getStringOrEmpty(deliveryPersonEditText);
            runData.run_id = mRunID;



            if (!(runData.collect_address.isEmpty() && runData.delivery_address.isEmpty())){
                // try to update, if success update recycler.
                if (runDbHelper.updateRun(runData, context)){ 
                // when true, update successfull
                // now, update recyclerview

                } else {
                    Toast.makeText(context, "Record not updated. try again", Toast.LENGTH_SHORT).show();
                }
            } else {
                Toast.makeText(context, R.string.dialog_insert_run_toast_nowhere, Toast.LENGTH_SHORT).show();
            }
        }
    });

    editRunDialog.setNegativeButton(R.string.button_negative, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            dialog.cancel();
        }
    });

    editRunDialog.create();
    editRunDialog.show();

}

private String getStringOrEmpty(EditText editText) {
    String mString = editText.getText().toString();
    mString = (mString.isEmpty() ? "" : mString);
    return mString;
}

class RecyclerViewHolder extends RecyclerView.ViewHolder {
    TextView runID, collectPerson, collectAddress, deliveryPerson, deliveryAddress, runParcel;
    ImageView ivEdit;


    RecyclerViewHolder(View rowView) {
        super(rowView);
        runID = (TextView) rowView.findViewById(R.id.runId);
        collectAddress = (TextView) rowView.findViewById(R.id.collectAddress);
        collectPerson = (TextView) rowView.findViewById(R.id.collectPerson);
        runParcel = (TextView) rowView.findViewById(R.id.runParcel);
        deliveryAddress = (TextView) rowView.findViewById(R.id.deliveryAddress);
        deliveryPerson = (TextView) rowView.findViewById(R.id.deliveryPerson);
        ivEdit = (ImageView) rowView.findViewById(R.id.ivEdit);
    }
}

}

What now? Who can save us?

java android android-recyclerview

asked by anonymous 24.01.2017 / 03:24

2 answers

1

Its structure is confusing, it would be interesting to have the adapter from RecyclerView to complement the response, but the idea goes something like this:

On your RecyclerView adapter you pass through the builder a list of elements that make up the cards, correct? Well, to update the RecyclerView, all you need is:

Take the data you are collecting in Dialog (from what I saw you already do this)

Instantiate the class you use as List element with these new data

Switch in the position that was clicked, the old element with the new

Prompt for your recyclerView that the list has changed, through recyclerView.notifyDataSetChanged()

Ready!

Without your code it is difficult to give a more precise answer, but this is the step by step to update it, I took into consideration that you make the adapter as documentation suggests, but if you are using it in a different way, edit your answer with the adapter code that I try to be more explicit.

I think it was clear but for the sake of the no, good luck: P

24.01.2017 / 04:33

How to convert numeric value to boolean? Center a div with absolute position and text in the center of the parent div

score 3 · Accepted Answer

If you want to insert or remove items within the adapter , you will need to explicitly state that there has been a change. This is slightly different from notifyDataSetChanged() . Just create two methods of insertion and removal.

public void add(RunData item, int position) {
    items.add(position, item);
    notifyItemInserted(position);
}

public void remove(RunData item) {
    int position = items.indexOf(item);
    items.remove(position);
    notifyItemRemoved(position);
}

Using this way, it will be more efficient than using mAdapter.notifyDataSetChanged() for change checking throughout your list.

See in the documentation all methods dealing with RecycleView.Adapter .