I want to show News(Bengali language) from Rss feeds in Android ListView. When run the app nothing shows in screen. I'm sharing my codes. I will glad, if you guys tell me,if i doing anything wrong here
MainActivity.java
package com.andodev.android.reader;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.andodev.android.reader.data.RssItem;
import com.andodev.android.reader.listeners.ListListener;
import com.andodev.android.reader.util.RssReader;
public class NewsActivity extends Activity {
/**
* This method creates main application view
*/
List<RssItem> listItems = new ArrayList<RssItem>();
CustomAdapter adapt;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set view
setContentView(R.layout.main);
try {
// Create RSS reader
RssReader rssReader = new RssReader("http://www.amaderbarisal.com/feed/");
// Get a ListView from main view
ListView itcItems = (ListView) findViewById(R.id.list);
adapt = new CustomAdapter(this, listItems);
itcItems.setAdapter(adapt);
// Set list view item click listener
itcItems.setOnItemClickListener(new ListListener(rssReader.getItems(), this));
} catch (Exception e) {
Log.e("ITCRssReader", e.getMessage());
}
}
}
CustomAdapter
/**
*
*/
package com.andodev.android.reader;
import java.util.List;
import com.andodev.android.reader.data.RssItem;
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class CustomAdapter extends ArrayAdapter<RssItem> {
List<RssItem> listItems;
Context context;
public CustomAdapter(Context context,List<RssItem> listItems) {
super(context,R.layout.custom);
// TODO Auto-generated constructor stub
this.context = context;
this.listItems = listItems;
}
public RssItem getItem(int position){
return listItems.get(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v = convertView;
RssHolder holder = new RssHolder();
if(convertView == null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.custom, null);
TextView tv = (TextView)v.findViewById(R.id.name);
Typeface myTYpe = Typeface.createFromAsset(context.getAssets(), "solaiman-lipi.ttf");
tv.setTypeface(myTYpe);
holder.RssTitle = tv;
v.setTag(holder);
}
else{
holder = (RssHolder) v.getTag();
RssItem p = listItems.get(position);
holder.RssTitle.setText(p.getTitle());
}
return v;
}
private static class RssHolder{
public TextView RssTitle;
}
}
custom.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/name"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textStyle="bold"
/>
</LinearLayout>
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#b5b5b5"
android:dividerHeight="1dp"/>
</LinearLayout>
You are not setting the text in TextView in case convertView is null.
Instead of:
if(convertView == null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.custom, null);
TextView tv = (TextView)v.findViewById(R.id.name);
Typeface myTYpe = Typeface.createFromAsset(context.getAssets(), "solaiman-lipi.ttf");
tv.setTypeface(myTYpe);
holder.RssTitle = tv;
v.setTag(holder);
}
else{
holder = (RssHolder) v.getTag();
RssItem p = listItems.get(position);
holder.RssTitle.setText(p.getTitle());
}
Use
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.custom, null);
holder = new ViewHolder();
Typeface typeface = Typeface.createFromAsset(context.getAssets(), "solaiman-lipi.ttf")
holder.rssTitle = (TextView) convertView.findViewById(R.id.name);
holder.rssTitle.setTypeface(typeface);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.rssTitle.setText(listItems.get(position).getTitle());
return convertView;
Related
I want to create a ListView in a Fragment for chats just like WhatsApp but the adapter is showing null. Below is my code :
ChatsFragment.java
package com.houssup.userchat;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import java.util.ArrayList;
public class ChatsFragment extends Fragment {
ListView list;
CustomChatAdapter adapter;
public ChatsFragment chatsFragment = null;
public ArrayList<ListModel> CustomListViewValuesArr = new ArrayList<ListModel>();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.customrow_chat, container, false);
ListView lv= ( ListView )view.findViewById( R.id.list ); // List defined in XML ( See Below )
/**************** Create Custom Adapter *********/
setListData();
adapter=new CustomChatAdapter( getContext(), CustomListViewValuesArr);
lv.setAdapter(adapter);
return view;
}
public void setListData()
{
for (int i = 0; i < 11; i++) {
final ListModel sched = new ListModel();
/******* Firstly take data in model object ******/
sched.setName("Swapnil"+i);
sched.setDesignation("Interior Designer"+i);
/******** Take Model Object in ArrayList **********/
CustomListViewValuesArr.add( sched );
}
}
}
CustomChatAdapter.java
package com.houssup.userchat;
import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.content.res.Resources;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import de.hdodenhof.circleimageview.CircleImageView;
/**
* Created by hp on 01-06-2016.
*/
public class CustomChatAdapter extends BaseAdapter{
private Context context;
private ArrayList data;
private static LayoutInflater inflater=null;
ListModel tempValues=null;
int i=0;
/************* CustomChatAdapter Constructor *****************/
public CustomChatAdapter(Context context, ArrayList d) {
/********** Take passed values **********/
this.context=context;
data=d;
/*********** Layout inflator to call external xml layout () ***********/
inflater = ( LayoutInflater )context.
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
/******** What is the size of Passed Arraylist Size ************/
public int getCount() {
if(data.size()<=0)
return 1;
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
/********* Create a holder Class to contain inflated xml file elements *********/
public static class ViewHolder{
public TextView name;
public TextView designation;
public CircleImageView image;
}
/****** Depends upon data size called for each row , Create each ListView row *****/
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
ViewHolder holder;
if(convertView==null){
/****** Inflate tabitem.xml file for each row ( Defined below ) *******/
vi = inflater.inflate(R.layout.customrow_chat, null);
/****** View Holder Object to contain tabitem.xml file elements ******/
holder = new ViewHolder();
holder.name = (TextView) vi.findViewById(R.id.name);
holder.designation=(TextView)vi.findViewById(R.id.designation);
holder.image= (CircleImageView) vi.findViewById(R.id.image);
/************ Set holder with LayoutInflater ************/
vi.setTag( holder );
}
else
holder=(ViewHolder)vi.getTag();
if(data.size()<=0)
{
holder.name.setText("No Data");
}
else
{
/***** Get each Model object from Arraylist ********/
tempValues=null;
tempValues = ( ListModel ) data.get( position );
/************ Set Model values in Holder elements ***********/
holder.name.setText( tempValues.getName() );
holder.designation.setText( tempValues.getDesignation() );
holder.image.setImageResource(R.drawable.circuladp);
/******** Set Item Click Listner for LayoutInflater for each row *******/
/* vi.setOnClickListener(new OnItemClickListener( position ));*/
}
return vi;
}
/* #Override
public void onClick(View v) {
Log.v("CustomChatAdapter", "=====Row button clicked=====");
}*/
/********* Called when Item click in ListView ************/
/* private class OnItemClickListener implements View.OnClickListener {
private int mPosition;
OnItemClickListener(int position){
mPosition = position;
}
*//*#Override
public void onClick(View arg0) {
CustomListViewAndroidExample sct = (CustomListViewAndroidExample)activity;
*//**//**** Call onItemClick Method inside CustomListViewAndroidExample Class ( See Below )****//**//*
sct.onItemClick(mPosition);
}*/
}
fragment_chats.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.houssup.userchat.ChatsFragment">
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</FrameLayout>
customrow_chat.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/profile_image"
android:layout_width="60dp"
android:layout_height="60dp"
android:src="#drawable/circuladp"
app:civ_border_width="2dp"
app:civ_border_color="#FF000000"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:orientation="vertical">
<TextView
android:id="#+id/name"
android:layout_below="#id/title"
android:text="Yashvant Rai Bacchhan"
android:layout_marginLeft="50dp"
android:textSize="18dp"
android:textColor="#000000"
android:layout_marginTop="10dp"
android:textStyle="bold"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/designation"
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginTop="6dp"
android:layout_marginLeft="55dp"
android:textSize="14dp"
android:layout_height="wrap_content"
android:text="Designer"/>
</LinearLayout>
</LinearLayout>
This fragment is in a TabActivity.I don't know why it is showing null. Any help will be appreciated !!
The code shows that you inflating the fragment view for the layout 'R.layout.customrow_chat' but the layout name is 'fragment_chats.xml'. Typo?
See you code. you convertView is always null.
change it:
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView==null){
/****** Inflate tabitem.xml file for each row ( Defined below ) *******/
convertView = inflater.inflate(R.layout.customrow_chat, null);
/****** View Holder Object to contain tabitem.xml file elements ******/
holder = new ViewHolder();
holder.name = (TextView) convertView.findViewById(R.id.name);
holder.designation=(TextView)convertView.findViewById(R.id.designation);
holder.image= (CircleImageView) convertView.findViewById(R.id.image);
/************ Set holder with LayoutInflater ************/
convertView.setTag( holder );
}
else
holder=(ViewHolder)convertView.getTag();
if(data.size()<=0)
{
holder.name.setText("No Data");
}
else
{
/***** Get each Model object from Arraylist ********/
tempValues=null;
tempValues = ( ListModel ) data.get( position );
/************ Set Model values in Holder elements ***********/
holder.name.setText( tempValues.getName() );
holder.designation.setText( tempValues.getDesignation() );
holder.image.setImageResource(R.drawable.circuladp);
/******** Set Item Click Listner for LayoutInflater for each row *******/
/* vi.setOnClickListener(new OnItemClickListener( position ));*/
}
return convertView;
}
Hi I'm trying to show text, image alternatively in list view. To load the content into my list view i had three scenarios.
1. Some times i'm getting only the text from json. So, in this case i have to hide the ImageView
2. Some cases i'm getting only the image url from json. So, in this case i have to hide the TextView
3. In other case i'm getting both image url and text from json, so, in this case i don't have to hide anything
By following these scenarios i'm loading all the content correctly at first time but when i'm scrolling top to bottom and bottom to up. All the image views are filled with images (But there is no image url for that particular position)
My adapter code is
package com.app.listviewitemid.adapter;
import java.util.ArrayList;
import com.app.listviewitemid.R;
import com.app.listviewitemid.model.Items;
import com.bumptech.glide.Glide;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class ItemsAdapter extends ArrayAdapter<Items>{
ArrayList<Items> itemsArrayList;
int Resource;
LayoutInflater inflater;
Context context;
ViewHolder holder;
Button btnCheck;
Items globPosition;
public ItemsAdapter(Context context, int resource, ArrayList<Items> objects){
super(context, resource, objects);
this.context = context;
this.Resource = resource;
this.itemsArrayList = objects;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if(v == null){
v = inflater.inflate(Resource, null);
holder = new ViewHolder();
holder.tvPostID = (TextView) v.findViewById(R.id.tv_post_id);
holder.tvPostText = (TextView) v.findViewById(R.id.tv_post_text);
holder.ivPostImage = (ImageView) v.findViewById(R.id.iv_post_img);
btnCheck = (Button) v.findViewById(R.id.btn_check);
v.setTag(holder);
}else{
holder = (ViewHolder) v.getTag();
}
globPosition = itemsArrayList.get(position);
holder.tvPostID.setText(itemsArrayList.get(position).getPostID());
if(globPosition.getPostText().equals(null) || globPosition.getPostText().equals("")){
}else {
holder.tvPostText.setText(globPosition.getPostText());
}
if(globPosition.getPostImage().equals(null) || globPosition.getPostImage().equals("")){
}else {
Glide.with(context).load(globPosition.getPostImage()).placeholder(R.drawable.loading_img).error(R.drawable.bg_480_800).into(holder.ivPostImage);
}
btnCheck.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Log.e("PostID", globPosition.getPostID());
}
});
return v;
}
static class ViewHolder{
TextView tvPostID;
TextView tvPostText;
ImageView ivPostImage;
}
}
adapter layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/tv_post_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/post_id"
android:textColor="#000000"
android:textSize="12sp" />
<TextView
android:id="#+id/tv_post_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:textSize="12sp" />
<ImageView
android:id="#+id/iv_post_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/empty" />
<Button
android:id="#+id/btn_check"
android:layout_width="match_parent"
android:layout_height="35dp"
android:background="#000000"
android:text="#string/check"
android:textColor="#FFFFFF" />
</LinearLayout>
How to get rid of this?
if(globPosition.getPostText().equals(null) || globPosition.getPostText().equals("")){
holder.tvPostText.setVisibility(View.GONE);
}else {
holder.ivPostImage.setVisibility(View.GONE);
holder.tvPostText.setVisibility(View.VISIBLE);
holder.tvPostText.setText(globPosition.getPostText());
}
if(globPosition.getPostImage().equals(null) || globPosition.getPostImage().equals("")){
holder.ivPostImage.setVisibility(View.GONE);
}else {
holder.ivPostImage.setVisibility(View.GONE);
holder.tvPostText.setVisibility(View.VISIBLE);
Glide.with(context).load(globPosition.getPostImage()).placeholder(R.drawable.loading_img).error(R.drawable.bg_480_800).into(holder.ivPostImage);
}
I got the idea from ankit aggarwal answer (his code is not working properly but he gave me the basic idea). And one more thing, previously i didn't get the correct position, so i changed the adapter code little bit
Code
package com.app.listviewitemid.adapter;
import java.util.List;
import com.app.listviewitemid.R;
import com.app.listviewitemid.model.Items;
import com.bumptech.glide.Glide;
import android.annotation.SuppressLint;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class ItemsAdapter extends BaseAdapter{
List<Items> itemsArrayList;
int Resource;
LayoutInflater inflater;
Context context;
Button btnCheck;
public ItemsAdapter(Context context, List<Items> items) {
this.context = context;
this.itemsArrayList = items;
}
#Override
public int getCount() {
return itemsArrayList.size();
}
#Override
public Object getItem(int location) {
return itemsArrayList.get(location);
}
#Override
public long getItemId(int position) {
return position;
}
#SuppressLint("InflateParams") #Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.adapter_layout, null);
TextView tvPostID = (TextView) convertView.findViewById(R.id.tv_post_id);
TextView tvPostText = (TextView) convertView.findViewById(R.id.tv_post_text);
ImageView ivPostImage = (ImageView) convertView.findViewById(R.id.iv_post_img);
btnCheck = (Button) convertView.findViewById(R.id.btn_check);
final Items items = itemsArrayList.get(position);
tvPostID.setText(items.getPostID());
if(items.getPostText().equals(null) || items.getPostText().equals("")){
tvPostText.setVisibility(View.GONE);
}else {
//ivPostImage.setVisibility(View.GONE);
if(items.getPostImage().equals(null) || items.getPostImage().equals("")){
ivPostImage.setVisibility(View.GONE);
}else {
ivPostImage.setVisibility(View.VISIBLE);
tvPostText.setVisibility(View.GONE);
Glide.with(context).load(items.getPostImage()).placeholder(R.drawable.loading_img).error(R.drawable.bg_480_800).into(ivPostImage);
}
tvPostText.setVisibility(View.VISIBLE);
tvPostText.setText(items.getPostText());
}
if(items.getPostImage().equals(null) || items.getPostImage().equals("")){
ivPostImage.setVisibility(View.GONE);
}else {
ivPostImage.setVisibility(View.VISIBLE);
//tvPostText.setVisibility(View.GONE);
if(items.getPostText().equals(null) || items.getPostText().equals("")){
tvPostText.setVisibility(View.GONE);
}else {
tvPostText.setVisibility(View.VISIBLE);
tvPostText.setText(items.getPostText());
}
Glide.with(context).load(items.getPostImage()).placeholder(R.drawable.loading_img).error(R.drawable.bg_480_800).into(ivPostImage);
}
btnCheck.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Log.e("PostID", items.getPostID());
}
});
return convertView;
}
}
Thanks to ankit aggarwal
I am new to android and facing one very comman problem of listview i googled alot but did'nt found anything usefull for my case.Hope you people show me the right direction.Whenever I am changing my image from "plus" to "tick" on click my last item image also got automatically changed on scroll.
My list_comapare_product XMl :-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white_color"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:background="#color/white_color"
android:gravity="center_vertical" >
<ImageView
android:id="#+id/img_product"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/crane" />
<com.mss.skyjack.custom.views.SkyjackCustomTextview
android:id="#+id/tv_product_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center"
android:text="test"
android:textAppearance="?android:attr/textAppearanceMedium" />
<ImageView
android:id="#+id/img_plus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/plus" />
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:background="#color/black_color" />
</LinearLayout>
Here is my Adapter :-
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class ComapreProductSelectionAdapter extends BaseAdapter {
Activity activity;
List<SelectorTest> listSelector;
private LayoutInflater mLayoutInflater;
public ComapreProductSelectionAdapter(Activity activity,
List<SelectorTest> listSelector) {
this.activity = activity;
this.listSelector = listSelector;
mLayoutInflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return listSelector.size();
}
#Override
public SelectorTest getItem(int position) {
return listSelector.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
final int i = position;
final SelectorTest listItem = listSelector.get(position);
if (convertView == null) {
convertView = mLayoutInflater.inflate(
R.layout.list_comapare_product, parent, false);
viewHolder = new ViewHolder();
viewHolder.tvProductName = (TextView) convertView
.findViewById(R.id.tv_product_name);
viewHolder.imgProduct = (ImageView) convertView
.findViewById(R.id.img_product);
viewHolder.imgadd = (ImageView) convertView
.findViewById(R.id.img_plus);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.imgadd.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (viewHolder.imgadd.getDrawable().getConstantState() == activity
.getResources().getDrawable(R.drawable.plus)
.getConstantState()) {
viewHolder.imgadd.setImageResource(R.drawable.tick);
} else {
viewHolder.imgadd.setImageResource(R.drawable.plus);
}
}
});
return convertView;
}
static class ViewHolder {
TextView tvProductName;
ImageView imgProduct, imgadd;
View viewRightLine;
}
}
Thanks.
You need to keep track of which items have been "ticked". I copied your adapter and made necessary changes. You can just copy-paste the code and it should work.
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class ComapreProductSelectionAdapter extends BaseAdapter {
Activity activity;
List<SelectorTest> listSelector;
private LayoutInflater mLayoutInflater;
private ArrayList<Integer> tickedItems = new ArrayList<Integer>();
public ComapreProductSelectionAdapter(Activity activity,
List<SelectorTest> listSelector) {
this.activity = activity;
this.listSelector = listSelector;
mLayoutInflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return listSelector.size();
}
#Override
public SelectorTest getItem(int position) {
return listSelector.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
final int i = position;
final SelectorTest listItem = listSelector.get(position);
if (convertView == null) {
convertView = mLayoutInflater.inflate(
R.layout.list_comapare_product, parent, false);
viewHolder = new ViewHolder();
viewHolder.tvProductName = (TextView) convertView
.findViewById(R.id.tv_product_name);
viewHolder.imgProduct = (ImageView) convertView
.findViewById(R.id.img_product);
viewHolder.imgadd = (ImageView) convertView
.findViewById(R.id.img_plus);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.imgadd.setTag(position);
viewHolder.imgadd.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(tickedItems.contains((Integer)v.getTag()) {
//Already ticked, set to plus
viewHolder.imgadd.setImageDrawable(activity.getResources().getDrawable(R.drawable.plus));
tickedItems.remove((Integer)v.getTag());
} else {
tickedItems.add((Integer)v.getTag());
viewHolder.imgadd.setImageDrawable(activity.getResources().getDrawable(R.drawable.tick));
}
}
});
if(tickedItems.contains(position))
viewHolder.imgadd.setImageDrawable(activity.getResources().getDrawable(R.drawable.tick));
else
viewHolder.imgadd.setImageDrawable(activity.getResources().getDrawable(R.drawable.plus));
return convertView;
}
static class ViewHolder {
TextView tvProductName;
ImageView imgProduct, imgadd;
View viewRightLine;
}
}
As an extra, don't use ImageView.setImageResource() as it is inefficient.
Quote from Android docs about ImageView.setImageReource()
This does Bitmap reading and decoding on the UI thread, which can cause a latency hiccup. If that's a concern, consider using setImageDrawable(android.graphics.drawable.Drawable) or setImageBitmap(android.graphics.Bitmap) and BitmapFactory instead.
I'm getting a null pointer exception
Following is the code of the GridAdaper.java used:
package com.example.toggle;
import java.util.ArrayList;
import java.util.List;
import com.example.toggle.R;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Toast;
import android.widget.ToggleButton;
public class GridAdapter extends ArrayAdapter{
private Context context;
private int layoutResourceId;
private ArrayList<String> data = new ArrayList();
public GridAdapter(Context context, int textViewResourceId, ArrayList<String> objects) {
super(context, textViewResourceId, objects);
// TODO Auto-generated constructor stub
this.context= context;
this.layoutResourceId = textViewResourceId;
this.data = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View gridItem = convertView;
ViewHolder holder = null;
if(gridItem == null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
gridItem = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.toggle = (ToggleButton) gridItem.findViewById(R.id.togglebutton);
gridItem.setTag(holder);
}
else
holder = (ViewHolder) gridItem.getTag();
String item = (String) data.get(position);
data.add("add");
if(item == "add")
holder.toggle.setBackgroundResource(R.drawable.add_grid);
return gridItem;
}
}
class ViewHolder
{
ToggleButton toggle;
}
The code for MainActivity.java is:
public class MainActivity extends Activity {
ArrayList<String> al;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView grid = (GridView) findViewById(R.id.gridView);
al.add("add");
GridAdapter ada = new GridAdapter(MainActivity.this, R.layout.grid_item, al);
grid.setAdapter(ada);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
The main_activity.xml is :
<GridView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/gridView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="90dp"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center"
>
</GridView>
and the griditem.xml is :
<?xml version="1.0" encoding="utf-8"?>
<ToggleButton xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/togglebutton"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</ToggleButton>
The add_grid.xml works fine I've checked it!
Please help me out. Thanks in advance!
Initializing the arrayList in the onCreate method:
arrayList = new ArrayList<String>();
last days I was browsing one of the apps in Android
and I found out an amazing list.
I Found that Custom ListView Interesting.
When we click on the Text it shows me some Activity and when we click on the Arrow on Right it shows me a dialog.
I want to learn this. Can anybody go through some Tutorials where this Custom List is explained. Please Friends. guide me.. Thanks alot
Hi Below Is Custom ListView Example
First Create test.Java File below is code
package com.test;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
public class test extends Activity {
/** Called when the activity is first created. */
ArrayList<String> arrayString = new ArrayList<String>();
test_adapter adapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
arrayString.add("TextView1");
arrayString.add("TextView2");
arrayString.add("TextView3");
arrayString.add("TextView4");
arrayString.add("TextView5");
ListView list = (ListView) findViewById(R.id.LIST);
adapter = new test_adapter(this, arrayString);
list.setAdapter(adapter);
}
}
Also Used below Class file test_adapter.java
package com.test;
import java.util.ArrayList;
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
public class test_adapter extends BaseAdapter {
private Activity activity;
ArrayList<String> data = new ArrayList<String>();
private static LayoutInflater inflater = null;
public test_adapter(Activity a, ArrayList<String> d) {
activity = a;
data = d;
inflater = LayoutInflater.from(activity);
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public static class ViewHolder {
public TextView txt1;
public Button btn1;
public RelativeLayout rel1;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
final ViewHolder holder;
if (convertView == null) {
vi = inflater.inflate(R.layout.listview, null);
holder = new ViewHolder();
holder.txt1 = (TextView) vi.findViewById(R.id.txt1);
holder.btn1 = (Button) vi.findViewById(R.id.btn1);
holder.rel1 = (RelativeLayout) vi.findViewById(R.id.rel1);
vi.setTag(holder);
} else
holder = (ViewHolder) vi.getTag();
holder.txt1.setText(data.get(position));
holder.rel1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast
.makeText(activity, "Click On TextView",
Toast.LENGTH_LONG).show();
}
});
holder.btn1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(activity, "Click On Button", Toast.LENGTH_LONG)
.show();
}
});
return vi;
}
}
Used below layout files main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<ListView android:layout_width="fill_parent" android:id="#+id/LIST"
android:layout_height="fill_parent" />
</LinearLayout>
Used listview.xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:orientation="horizontal">
<RelativeLayout android:id="#+id/rel1" android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content" android:id="#+id/txt1"
android:text="Test Description"></TextView>
</RelativeLayout>
<RelativeLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button android:id="#+id/btn1" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="ClickHere"
android:layout_alignParentRight="true"></Button>
</RelativeLayout>
</LinearLayout>
Used Above Code and you will get display toast message and you can changed as per you requirement.