What i have done:
I am aware of using dependency injection of Roboguice in activity like below
#InjectView(R.id.listView) ListView listView;
Question:
How to use this in a
CODE
From activity I am calling adapter like below::
AdptOrderListHome tickets = new AdptOrderListHome(getActivity(), result.getProducts());
listView.setAdapter(tickets);
AdptOrderListHome.java
public class AdptOrderListHome extends BaseAdapter {
ArrayList<InventoryProductItems> mProducts;
private Context mContext = null;
public AdptOrderListHome(Context context, ArrayList<InventoryProductItems> products) {
super();
mContext = context;
mProducts = products;
Log.d("",mProducts.size()+"");
Log.d("",mProducts.size()+"");
}
public int getCount() {
return mProducts.size();
}
public InventoryProductItems getItem(int position) {
return mProducts.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
final ViewHolder vHolder;
if (convertView == null) {
LayoutInflater layout = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = layout.inflate(R.layout.row_order_list_home, null);
vHolder = new ViewHolder(view);
view.setTag(vHolder);
} else {
vHolder = (ViewHolder) view.getTag();
}
//Set the tag
vHolder.txtProductNameId.setTag(mProducts.get(position).getProduct().getId());
vHolder.txtProductNameId.setText(mProducts.get(position).getProduct().getName());
vHolder.txtInStockId.setText(mProducts.get(position).getCurrent_Product_item_Count()+"");
vHolder.txtRbProductsId.setText(mProducts.get(position).getRB_Product_item_Count()+"");
return view;
}
class ViewHolder {
private TextView txtProductNameId, txtInStockId, txtRbProductsId;
private LinearLayout root;
public ViewHolder(View base) {
txtProductNameId = (TextView) base.findViewById(R.id.txtProductNameId);
txtInStockId = (TextView) base.findViewById(R.id.txtInStockId);
txtRbProductsId = (TextView) base.findViewById(R.id.txtRbProductsId);
root = (LinearLayout) base.findViewById(R.id.root);
}
}
}
EDIT
class ViewHolder {
#InjectView(R.id.txtProductNameId) private TextView txtProductNameId;
#InjectView(R.id.txtInStockId) private TextView txtInStockId;
#InjectView(R.id.txtRbProductsId) private TextView txtRbProductsId;
public ViewHolder(View base) {
RoboGuice.getInjector(base.getContext()).injectViewMembers(mContext);
}
}
error:
mContext giving me error in line
RoboGuice.getInjector(base.getContext()).injectViewMembers(mContext);
Cannot resolve method inject view members
You can look at the source of RoboActivity to see how it is done.
Basically, you need to call RoboInjector.injectViewMembers() in the constructor of your viewholder. Something like this:
class ViewHolder {
#InjectView(R.id.txtView)
private TextView txtView;
#InjectView(R.id.imgView)
private ImageView imgView;
public ViewHolder(View root) {
RoboGuice.getInjector(root.getContext()).injectViewMembers(this);
}
}
Note that this will only View Injection.
If you want to do Dependency Injection (with #Inject fields), you should use RoboInjector.injectMembersWithoutViews().
Related
I'm trying to have my application display a specific layout when the arraylist PinnedSongs is empty.
I've created different viewholders and tried to inflate them depending on the PinnedSongs.size. Meaning, if it's 0, then the onCreateViewHolder should inflate a special layout. If it's different, then inflate another one.
public class RecyclerAdapterHome extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public class Viewholder extends RecyclerView.ViewHolder implements View.OnClickListener{
CardView home_cardView;
TextView home_textView;
TextView home_textView_2;
Button home_button;
Button home_button_2;
RelativeLayout parentlayout;
OnNoteListener_2 onNoteListener2;
public Viewholder(#NonNull View itemView, OnNoteListener_2 onNoteListener_2) {
super(itemView);
home_cardView = itemView.findViewById(R.id.cardview_2);
home_textView = itemView.findViewById(R.id.cardview_2_textview);
home_textView_2 = itemView.findViewById(R.id.cardview_2_textview_sub);
home_button = itemView.findViewById(R.id.play_button);
home_button_2 = itemView.findViewById(R.id.push_button);
parentlayout = itemView.findViewById(R.id.home_parentlayout);
home_button.setOnClickListener(this);
this.onNoteListener2 = onNoteListener_2;
}
#Override
public void onClick(View v) {
onNoteListener2.onClick(getAdapterPosition());
}
}
public class Viewholder_2 extends RecyclerView.ViewHolder {
TextView textView_3;
ImageView imageView;
RelativeLayout parentlayout;
public Viewholder_2(#NonNull View itemView) {
super(itemView);
textView_3 = itemView.findViewById(R.id.text_warning);
imageView = itemView.findViewById(R.id.icon);
parentlayout = itemView.findViewById(R.id.home_parentlayout);
}
}
public RecyclerAdapterHome(OnNoteListener_2 mOnNoteListener2, ArrayList<String> pinnedSongs, ArrayList<String> pinnedSongsArtists, Context mContext) {
this.mOnNoteListener2 = mOnNoteListener2;
this.PinnedSongs = pinnedSongs;
this.PinnedSongsArtists = pinnedSongsArtists;
this.mContext = mContext;
}
private ArrayList<String> PinnedSongs = new ArrayList<>();
private ArrayList<String> PinnedSongsArtists = new ArrayList<>();
private Context mContext;
private OnNoteListener_2 mOnNoteListener2;
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = null;
if (PinnedSongs.size()==0){
v = LayoutInflater.from(parent.getContext()).inflate(R.layout.nothing, parent, false);
return new Viewholder_2(v);
}else{
v = LayoutInflater.from(parent.getContext()).inflate(R.layout.homeviewholder,
parent, false);
return new Viewholder(v,mOnNoteListener2 );
}
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
if (PinnedSongs.size()==0){
Viewholder_2 viewholder_2 = (Viewholder_2) holder;
}else{
Viewholder viewholder = (Viewholder) holder;
viewholder.home_textView.setText(PinnedSongs.get(position));
viewholder.home_textView_2.setText(PinnedSongsArtists.get(position));
}
}
#Override
public int getItemCount() {
return PinnedSongs.size();
}
public interface OnNoteListener_2 {
void onClick(int position);
}
}
So far, the recyclerview shows nothing when the PinnedSongs list is at zero. But it shows something when it's above zero. Any idea on how I can fix it?
(I'm using the androidx libraries if it has anything to do with that).
It doesn't work because the getItemCount method returns 0 and the RecyclerView never tries to instantiate a view.
It means that onBindViewHolder is not called when the size=0.
You have different options to do it. One of these is:
#Override
public int getItemCount() {
return PinnedSongs.size() > 0 ? PinnedSongs.size() : 1;
}
#Override
public int getItemViewType(int position) {
if (PinnedSongs.size() == 0) {
return EMPTY_VIEW;
}
return super.getItemViewType(position);
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v;
if (viewType == EMPTY_VIEW) {
v = LayoutInflater.from(parent.getContext()).inflate(R.layout.nothing, parent, false);
EmptyViewHolder emptyViewHolder = new EmptyViewHolder(v);
return emptyViewHolder;
}
//normal case
v = LayoutInflater.from(parent.getContext()).inflate(R.layout.homeviewholder, parent, false);
ViewHolder viewholder = new ViewHolder(v);
return viewholder;
}
public class EmptyViewHolder extends RecyclerView.ViewHolder {
public EmptyViewHolder(View itemView) {
super(itemView);
}
}
private static final int EMPTY_VIEW = 1000;
I am trying to get json with dynamic objects in Android. So I am using Map<> to get the json. I want to use the Map inside BaseAdapter. I am getting the following error
Incompatible types.Required:com.example.EffectList. Found:java.util.Map< java.lang.String,java.util.List< com.example.EffectList >>
This is my BaseAdapter code:
public class MyContactAdapter2 extends BaseAdapter {
List<Map<String, List<EffectList>>> contactList;
Context context;
private LayoutInflater mInflater;
// Constructors
public MyContactAdapter2(Context context, List<Map<String, List<EffectList>>> objects) {
this.context = context;
this.mInflater = LayoutInflater.from(context);
contactList = objects;
}
#Override
public int getCount() {
return contactList.size();
}
#Override
public Map<String, List<EffectList>> getItem(int position) {
return contactList.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final MyContactAdapter2.ViewHolder vh;
if (convertView == null) {
View view = mInflater.inflate(R.layout.get_layout_row_view, parent, false);
vh = MyContactAdapter2.ViewHolder.create((RelativeLayout) view);
view.setTag(vh);
} else {
vh = (MyContactAdapter2.ViewHolder) convertView.getTag();
}
EffectList item = getItem(position); // COMPILE TIME ERROR HERE
vh.textViewName.setText(item.getEffectsId());
vh.textViewEmail.setText(item.getEffectsName());
return vh.rootView;
}
private static class ViewHolder {
public final RelativeLayout rootView;
public final ImageView imageView;
public final TextView textViewName;
public final TextView textViewEmail;
private ViewHolder(RelativeLayout rootView, ImageView imageView, TextView textViewName, TextView textViewEmail) {
this.rootView = rootView;
this.imageView = imageView;
this.textViewName = textViewName;
this.textViewEmail = textViewEmail;
}
public static MyContactAdapter2.ViewHolder create(RelativeLayout rootView) {
ImageView imageView = (ImageView) rootView.findViewById(R.id.imageView);
TextView textViewName = (TextView) rootView.findViewById(R.id.textViewName);
TextView textViewEmail = (TextView) rootView.findViewById(R.id.textViewEmail);
return new MyContactAdapter2.ViewHolder(rootView, imageView, textViewName, textViewEmail);
}
}
}
what's wrong in my code?
Well its quite simple, your getItem method returns an object of the type Map<String, List<EffectList>>, you can not cast this type directly to an EffectList.
Something like this is required to obtain an EffectList item:
EffectList item = getItem(position).get("somekey").get(0);
Solutions
Get something out of the Map and then out of the List which is
inside the Map.
Modify your BaseAdapter getItem method to return an object of the EffectList type, and modify your getCount method to return te correct item count;
A few side notes:
I suggest you rethink and redesign your data structure, do you really need a List which contains a Map which contains a List?
I would personally not use a Map to back a Adapter, the item order within a Map is (often) undefined (unless you use a Map implementation where the order is defined);
This question has been asked previously. Sorry, I am new to Android, those answers didn't helped me.
I am trying to parse the following json using retrofit,Android. In the json below, objects 4 and 1 are Dynamic. So I am using Map to get the data.
{
"effect_list":[
{
"4":[
{
"effects_id":"18",
"effects_name":"Band 1"
},
{
"effects_id":"19",
"effects_name":"Band 2"
}
],
"1":[
{
"effects_id":"1",
"effects_name":"Background Blur"
},
{
"effects_id":"4",
"effects_name":"Blemish Removal"
}
]
}
]
}
Now I want to display the json data inside listview using BaseAdapter.
I tried
MyContactAdapter2.java
public class MyContactAdapter2 extends BaseAdapter {
List<Map<String, List<EffectList>>> contactList;
Context context;
private LayoutInflater mInflater;
// Constructors
public MyContactAdapter2(Context context, List<Map<String, List<EffectList>>> objects) {
this.context = context;
this.mInflater = LayoutInflater.from(context);
contactList = objects;
}
#Override
public int getCount() {
return contactList.size();
}
#Override
public EffectList getItem(int position) {
return (EffectList) contactList.get(position); <----- ERROR HERE DURING RUNTIME
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final MyContactAdapter2.ViewHolder vh;
if (convertView == null) {
View view = mInflater.inflate(R.layout.get_layout_row_view, parent, false);
vh = MyContactAdapter2.ViewHolder.create((RelativeLayout) view);
view.setTag(vh);
} else {
vh = (MyContactAdapter2.ViewHolder) convertView.getTag();
}
EffectList item = getItem(position); <----- ERROR HERE DURING RUNTIME
vh.textViewName.setText(item.getEffectsId());
vh.textViewEmail.setText(item.getEffectsName());
return vh.rootView;
}
private static class ViewHolder {
public final RelativeLayout rootView;
public final ImageView imageView;
public final TextView textViewName;
public final TextView textViewEmail;
private ViewHolder(RelativeLayout rootView, ImageView imageView, TextView textViewName, TextView textViewEmail) {
this.rootView = rootView;
this.imageView = imageView;
this.textViewName = textViewName;
this.textViewEmail = textViewEmail;
}
public static MyContactAdapter2.ViewHolder create(RelativeLayout rootView) {
ImageView imageView = (ImageView) rootView.findViewById(R.id.imageView);
TextView textViewName = (TextView) rootView.findViewById(R.id.textViewName);
TextView textViewEmail = (TextView) rootView.findViewById(R.id.textViewEmail);
return new MyContactAdapter2.ViewHolder(rootView, imageView, textViewName, textViewEmail);
}
}
}
I am getting the following error during Runtime.
java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap cannot be cast to my class
What am I doing wrong here?
Return Map<String,List<EffectList>> from getItem method because contactList contains Map as items:
#Override
public Map<String,List<EffectList>> getItem(int position) {
return contactList.get(position);
}
And in getView use keys to access values from Map:
Map<String,List<EffectList>> map=getItem(position);
List<EffectList> effectList = map.get("KEY_NAME");
// get item from effectList using for loop
I am trying to create a custom adapter for a shop element in my Android app but every time I scroll down the list the images seem to change their position, I have had a look around on here already but suggestions that I have found and tried have been to no avail.
Each item has a title, an image (being loading via an AsyncTask or retrieved from the LRUCache) and a price of the item below is the code I use to generate the adapter.
public class ShopAdapter extends BaseAdapter {
public Context context;
public ArrayList<ShopItem> shopItemList;
public ImageCache imageCache;
String imageToLoad;
Bitmap shopImage;
public ShopAdapter(Context context, ArrayList<ShopItem> shopItemList) {
this.context = context;
this.shopItemList = shopItemList;
imageCache = new ImageCache(this.context);
}
#Override
public int getCount() {
return shopItemList.size();
}
#Override
public Object getItem(int position) {
return shopItemList.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView == null){
LayoutInflater vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.shop_list, null);
holder = new ViewHolder();
holder.title = (TextView) convertView.findViewById(R.id.textView3);
holder.image =(ImageView) convertView.findViewById(R.id.imageView);
holder.price = (TextView) convertView.findViewById(R.id.textView4);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.title.setText(shopItemList.get(position).getTitle());
shopImage = imageCache.getBitmapFromMemoryCache(shopItemList.get(position).getImage());
if(shopImage != null) {
holder.image.setImageBitmap(shopImage);
} else {
new LoadImage(context, holder.image).execute(imageToLoad);
}
holder.price.setText(shopItemList.get(position).getPrice());
return convertView;
}
static class ViewHolder {
TextView title;
ImageView image;
TextView price;
}
}
Any help would be very much appreciated!
in my android application I am displaying the contact list of phone in a list view and a check box in each row for selecting contacts. But when I am selecting a particular row about tenth row is also getting selected automatically. I am giving my code below, if any one knows please help..
public class ContactsAdapter extends BaseAdapter
{
private Context context;
private ArrayList<Contact> contacts;
public ContactsAdapter(Context context, ArrayList<Contact> contacts)
{
this.context = context;
this.contacts = contacts;
}
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View gridView;
final ViewHolder mHolder;
if (convertView == null)
{
// gridView = new View(context);
// get layout from mobile.xml
//gridView = inflater.inflate(R.layout.contact, null);
convertView = inflater.inflate(R.layout.contact, null);
mHolder = new ViewHolder();
mHolder.textName =(TextView) convertView.findViewById(R.id.name);
mHolder.textMobile =(TextView) convertView.findViewById(R.id.mobile);
mHolder.textSelector =(CheckBox) convertView.findViewById(R.id.selected);
convertView.setTag(mHolder);
));
}
else
{
mHolder = (ViewHolder) convertView.getTag();
mHolder.textSelector.setOnCheckedChangeListener(null);
}
mHolder.textMobile.setText(contacts.get(position).getMobile());
mHolder.textName.setText(contacts.get(position).getName());
mHolder.textSelector.setFocusable(false);
return convertView;
}
private class ViewHolder {
private TextView textMobile,textName;
private CheckBox textSelector;
}
#Override
public int getCount() {
return contacts.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
}
Well Thats because ViewHolder will recycle the Views everytime you Scroll
i suggest you to Use onCLick on ListItem instead checkbox
To overcome this Declare a SparseBooleanArray
SparseBooleanArray sba=new SparseBooleanArray();//this should be global
Then set the items checked state as soon as you render it
mHolder.textSelector =(CheckBox) convertView.findViewById(R.id.selected);
mHolder.textSelector.setChecked(sba.get(position));
Then write a onClickListener to you convertView and check it manually
convertView.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
mHolder.textSelector.setChecked(isChecked);
sba.put(position,isChecked); //storing the state
}
}
);
**Well Now the sba has list items checked and you can use that for further Actions**
# Jocheved... edit your code like this...
public class ContactsAdapter extends BaseAdapter
{
private Context context;
private ArrayList<Contact> contacts;
SparseBooleanArray sba=new SparseBooleanArray();
public ContactsAdapter(Context context, ArrayList<Contact> contacts)
{
this.context = context;
this.contacts = contacts;
}
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final ViewHolder mHolder;
if (convertView == null)
{
convertView = inflater.inflate(R.layout.contact, null);
mHolder = new ViewHolder();
mHolder.textName =(TextView) convertView.findViewById(R.id.name);
mHolder.textMobile =(TextView) convertView.findViewById(R.id.mobile);
mHolder.textSelector =(CheckBox) convertView.findViewById(R.id.selected);
convertView.setTag(mHolder);
}
else
{
mHolder = (ViewHolder) convertView.getTag();
}
mHolder.textMobile.setText(contacts.get(position).getMobile());
mHolder.textName.setText(contacts.get(position).getName());
mHolder.textName.setSelected(true);
mHolder.textSelector.setChecked(sba.get(position));
mHolder.textSelector.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
if(mHolder.textSelector.isChecked())
{
sba.put(position, true);
}
else
{
sba.put(position, false);
}
}
});
return convertView;
}
private class ViewHolder
{
private TextView textMobile,textName;
private CheckBox textSelector;
}
#Override
public int getCount() {
return contacts.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
}