joehamirbalabadan.com joehamirbalabadan.com - 4 months ago 33
Android Question

How to refresh listview after click imagebutton in listview item from adapter?

please help me.

just want to know how can i refresh listview after i click imagebutton in my item.

here is my button onclick inside adapter..

buttonHeart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (arg0 != null) {
FragmentOne_DbAdapter database=new FragmentOne_DbAdapter(context);
database.open();


if(favorite.matches("0")) {
database.updateItemFavorite(_id,"1");
buttonHeart.setImageResource(R.drawable.heartred);
//Toast.makeText(arg0.getContext(),favorite,Toast.LENGTH_LONG).show();
}else if(favorite.matches("1")){
database.updateItemFavorite(_id, "0");
buttonHeart.setImageResource(R.drawable.heart);
//Toast.makeText(arg0.getContext(),favorite,Toast.LENGTH_LONG).show();
}
}
}
});


here is my complete adapter..

package com.magicstarme.virtualsongbook;

import android.content.Context;
import android.database.Cursor;
import android.media.Image;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;

import java.util.ArrayList;

/**
* Created by Joe on 6/29/2016.
*/
public class FragmentOne_Adapter extends CursorAdapter {

public FragmentOne_Adapter(Context context, Cursor c, int flags) {
super(context, c, flags);
// TODO Auto-generated constructor stub
}

@Override
public void bindView(View view, final Context context, Cursor cursor) {
// TODO Auto-generated method stub
TextView txtTitle = (TextView) view.findViewById(R.id.title);
TextView txtArtist = (TextView) view.findViewById(R.id.artist);
TextView txtVolume = (TextView) view.findViewById(R.id.volume);
TextView txtNumber = (TextView) view.findViewById(R.id.number);

final ImageButton buttonHeart = (ImageButton) view.findViewById(R.id.heart);


final int _id = cursor.getInt(cursor.getColumnIndexOrThrow("_id"));
String title = cursor.getString(cursor.getColumnIndexOrThrow("title"));
String artist = cursor.getString(cursor.getColumnIndexOrThrow("artist"));
String volume = cursor.getString(cursor.getColumnIndexOrThrow("volume"));
final String favorite = cursor.getString(cursor.getColumnIndexOrThrow("favorite"));
String number = cursor.getString(cursor.getColumnIndexOrThrow("number"));

// Populate fields with extracted properties
txtTitle.setText(title);
txtArtist.setText(artist);
txtVolume.setText(volume);
txtNumber.setText(number);

if(favorite.matches("0")) {
buttonHeart.setImageResource(R.drawable.heart);
}else if(favorite.matches("1")){
buttonHeart.setImageResource(R.drawable.heartred);
}

buttonHeart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (arg0 != null) {
FragmentOne_DbAdapter database=new FragmentOne_DbAdapter(context);
database.open();


if(favorite.matches("0")) {
database.updateItemFavorite(_id,"1");
buttonHeart.setImageResource(R.drawable.heartred);
//Toast.makeText(arg0.getContext(),favorite,Toast.LENGTH_LONG).show();
}else if(favorite.matches("1")){
database.updateItemFavorite(_id, "0");
buttonHeart.setImageResource(R.drawable.heart);
//Toast.makeText(arg0.getContext(),favorite,Toast.LENGTH_LONG).show();
}
}
}
});

}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// TODO Auto-generated method stub
return LayoutInflater.from(context).inflate(R.layout.fragment_fragment_one_slview, parent, false);
}

}


and here is my fragment..

package com.magicstarme.virtualsongbook;

import android.content.Context;
import android.database.Cursor;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.FilterQueryProvider;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.SimpleCursorAdapter;
import android.widget.TabHost;
import android.widget.Toast;
import android.widget.ToggleButton;

import java.util.ArrayList;


/**
* A simple {@link Fragment} subclass.
* Activities that contain this fragment must implement the
* {@link FragmentOne.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {@link FragmentOne#newInstance} factory method to
* create an instance of this fragment.
*/
public class FragmentOne extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";

// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;

private OnFragmentInteractionListener mListener;

public FragmentOne() {
// Required empty public constructor
}

/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment FragmentOne.
*/
// TODO: Rename and change types and number of parameters
public static FragmentOne newInstance(String param1, String param2) {
FragmentOne fragment = new FragmentOne();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}

private FragmentOne_DbAdapter dbHelper;
private SimpleCursorAdapter dataAdapter;
private FragmentOne_Adapter FragmentOneAdapter;
ListView listView;
EditText player1ESearch;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_fragment_one, container, false);

TabHost host = (TabHost) rootView.findViewById(R.id.tabHost);
host.setup();

//Tab 1
TabHost.TabSpec spec = host.newTabSpec("SONG LIST");
spec.setContent(R.id.tab1);
spec.setIndicator("SONG LIST");
host.addTab(spec);


player1ESearch = (EditText) rootView.findViewById(R.id.player1Search);
listView = (ListView) rootView.findViewById(R.id.slPlayer1ListView);
dbHelper = new FragmentOne_DbAdapter(getActivity());
dbHelper.open();
//Clean all data
//dbHelper.deleteAllPlayer1();
//Add some data
dbHelper.insertPlayer1Songlist();
//Generate ListView from SQLite Database
displayPlayer1ListView();

ImageButton dplayer1ESearch=(ImageButton) rootView.findViewById(R.id.delete);
dplayer1ESearch.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
player1ESearch.setText("");
}
});


//Tab 2
spec = host.newTabSpec("NEW SONGS");
spec.setContent(R.id.tab2);
spec.setIndicator("NEW SONGS");
host.addTab(spec);

//Tab 3
spec = host.newTabSpec("FAVORITES");
spec.setContent(R.id.tab3);
spec.setIndicator("FAVORITES");
host.addTab(spec);

return rootView;
}

private void displayPlayer1ListView() {
Cursor cursor = dbHelper.fetchAllPlayer1();

FragmentOneAdapter = new FragmentOne_Adapter(getActivity(), cursor, 0);
listView.setAdapter(FragmentOneAdapter);

player1ESearch.addTextChangedListener(new TextWatcher() {

public void afterTextChanged(Editable s) {
}

public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}

public void onTextChanged(CharSequence s, int start,
int before, int count) {
FragmentOneAdapter.getFilter().filter(s.toString());
}
});

FragmentOneAdapter.setFilterQueryProvider(new FilterQueryProvider() {
public Cursor runQuery(CharSequence constraint) {
return dbHelper.fetchPlayer1ByTitle(constraint.toString());
}
});

}

// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}

@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}

@Override
public void onDetach() {
super.onDetach();
mListener = null;
}

/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p/>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}

Answer

Simple call notifyDataSetChanged(); when you click in button for refresh your ListView

buttonHeart.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View arg0) {
         ...
         notifyDataSetChanged();
    }
});