Develop Reference

Not working Notifydatasetchange on RecyclerView with center selection Horizontal Scrollview?

Auto Scrolling is issue & also move to some specific position using code is difficult.
I am making two recyclerView dependent to each other with the Horizontal Scroll and center selection.
So my problem is using the method of Notifydatasetchanged and reseting recyclerView postion to 0 and it's scrolling selection range because it's returning wrong index...
When i want to get center selection index after changing data.
I am using below example to achieve this with some edits.
Get center visible item of RecycleView when scrolling
I need to change the data on scroll of First recyclerView Adapter to second recyclerView Adapter with data change.
But scrollview set the position in first position
I tried the notifyItemRangeChanged(int, int)
notifyItemRangeInserted(int, int) methods...
Detail Explanation : I am changing the type and reset the value of Look scrollview. I need to change the selected position of bottom scrollview. Specially I can't get the center position by changing data. Means I if i am notifying the adapter than index will remain as it is. I need to do work it like normal adapter after reset data.
Thanks in advance.
public void getRecyclerview_Type() {
final RecyclerView recyclerView_Type = (RecyclerView) findViewById(R.id.recycleView);
if (recyclerView_Type != null) {
recyclerView_Type.postDelayed(new Runnable() {
#Override
public void run() {
setTypeValue();
}
}, 300);
recyclerView_Type.postDelayed(new Runnable() {
#Override
public void run() {
// recyclerView_Type.smoothScrollToPosition(Type_Adapter.getItemCount() - 1);
setTypeValue();
}
}, 5000);
}
ViewTreeObserver treeObserver = recyclerView_Type.getViewTreeObserver();
treeObserver.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
#Override
public boolean onPreDraw() {
recyclerView_Type.getViewTreeObserver().removeOnPreDrawListener(this);
finalWidthDate = recyclerView_Type.getMeasuredWidth();
itemWidthDate = getResources().getDimension(R.dimen.item_dob_width_padding);
paddingDate = (finalWidthDate - itemWidthDate) / 2;
firstItemWidthDate = paddingDate;
allPixelsDate = 0;
final LinearLayoutManager dateLayoutManager = new LinearLayoutManager(getApplicationContext());
dateLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
recyclerView_Type.setLayoutManager(dateLayoutManager);
recyclerView_Type.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
synchronized (this) {
if (newState == RecyclerView.SCROLL_STATE_IDLE) {
calculatePositionAndScroll_Type(recyclerView);
}
}
}
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
allPixelsDate += dx;
}
});
if (mTypeBeanArrayList == null) {
mTypeBeanArrayList = new ArrayList<>();
}
getMedicationType();
Type_Adapter = new Medication_Type_RecyclerAdapter(Add_Reminder_medicationlook_Activity.this, mTypeBeanArrayList, (int) firstItemWidthDate);
recyclerView_Type.setAdapter(Type_Adapter);
Type_Adapter.setSelecteditem(Type_Adapter.getItemCount() - 1);
return true;
}
});
}
private void getMedicationType() {
for (int i = 0; i < mTypeBeanArrayList.size(); i++) {
Medication_TypeBean medication_typeBean = mTypeBeanArrayList.get(i);
Log.print("Image name :" +medication_typeBean.getType_image_name());
if (i == 0 || i == (mTypeBeanArrayList.size() - 1)) {
medication_typeBean.setType(VIEW_TYPE_PADDING);
} else {
medication_typeBean.setType(VIEW_TYPE_ITEM);
}
mTypeBeanArrayList.set(i, medication_typeBean);
}
}
/* this if most important, if expectedPositionDate < 0 recyclerView will return to nearest item*/
private void calculatePositionAndScroll_Type(RecyclerView recyclerView) {
int expectedPositionDate = Math.round((allPixelsDate + paddingDate - firstItemWidthDate) / itemWidthDate);
if (expectedPositionDate == -1) {
expectedPositionDate = 0;
} else if (expectedPositionDate >= recyclerView.getAdapter().getItemCount() - 2) {
expectedPositionDate--;
}
scrollListToPosition_Type(recyclerView, expectedPositionDate);
}
/* this if most important, if expectedPositionDate < 0 recyclerView will return to nearest item*/
private void scrollListToPosition_Type(RecyclerView recyclerView, int expectedPositionDate) {
float targetScrollPosDate = expectedPositionDate * itemWidthDate + firstItemWidthDate - paddingDate;
float missingPxDate = targetScrollPosDate - allPixelsDate;
if (missingPxDate != 0) {
recyclerView.smoothScrollBy((int) missingPxDate, 0);
}
setTypeValue();
}
private void setTypeValue() {
int expectedPositionDateColor = Math.round((allPixelsDate + paddingDate - firstItemWidthDate) / itemWidthDate);
int setColorDate = expectedPositionDateColor + 1;
Type_Adapter.setSelecteditem(setColorDate);
mTxt_type_name.setText(mTypeBeanArrayList.get(setColorDate).getMedication_type_name());
mSELECTED_TYPE_ID = setColorDate;
//NotifyLookChangetoType(setColorDate);
}
//Type Adapter
public class Medication_Type_RecyclerAdapter extends RecyclerView.Adapter<Medication_Type_RecyclerAdapter.ViewHolder> {
private ArrayList<Medication_TypeBean> medication_typeBeanArrayList;
private static final int VIEW_TYPE_PADDING = 1;
private static final int VIEW_TYPE_ITEM = 2;
private int paddingWidthDate = 0;
private Context mContext;
private int selectedItem = -1;
public Medication_Type_RecyclerAdapter(Context context, ArrayList<Medication_TypeBean> dateData, int paddingWidthDate) {
this.medication_typeBeanArrayList = dateData;
this.paddingWidthDate = paddingWidthDate;
this.mContext = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == VIEW_TYPE_ITEM) {
final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_medication_type,
parent, false);
return new ViewHolder(view);
} else {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_medication_type,
parent, false);
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view.getLayoutParams();
layoutParams.width = paddingWidthDate;
view.setLayoutParams(layoutParams);
return new ViewHolder(view);
}
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Medication_TypeBean medication_typeBean = mTypeBeanArrayList.get(position);
if (getItemViewType(position) == VIEW_TYPE_ITEM) {
// holder.mTxt_Type.setText(medication_typeBean.getMedication_type_name());
//holder.mTxt_Type.setVisibility(View.VISIBLE);
holder.mImg_medication.setVisibility(View.VISIBLE);
int d = R.drawable.ic_type_pill;
try {
//Due to Offline requirements we do code like this get the images from our res folder
if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_pill")) {
d = R.drawable.ic_type_pill;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_patch")) {
d = R.drawable.ic_type_patch;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_capsule")) {
d = R.drawable.ic_type_capsule;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_ring")) {
d = R.drawable.ic_type_ring;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_inhaler")) {
d = R.drawable.ic_type_inhaler;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_spray")) {
d = R.drawable.ic_type_spray;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_bottle")) {
d = R.drawable.ic_type_bottle;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_drop")) {
d = R.drawable.ic_type_drop;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_pessaries")) {
d = R.drawable.ic_type_pessaries;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_sachets")) {
d = R.drawable.ic_type_sachets;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_tube")) {
d = R.drawable.ic_type_tube;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_suppository")) {
d = R.drawable.ic_type_suppository;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_injaction")) {
d = R.drawable.ic_type_injaction;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_spoon")) {
d = R.drawable.ic_type_spoon;
} else if (medication_typeBean.getType_image_name().equalsIgnoreCase("ic_type_powder")) {
d = R.drawable.ic_type_powder;
} else {
d = R.drawable.ic_type_pill;
}
Bitmap icon = BitmapFactory.decodeResource(mContext.getResources(),
d);
holder.mImg_medication.setImageBitmap(icon);
} catch (Exception e) {
Log.print(e);
}
// BitmapDrawable ob = new BitmapDrawable(mContext.getResources(), icon);
// img.setBackgroundDrawable(ob);
// holder.mImg_medication.setBackground(ob);
// Log.print("Type Adapter", "default " + position + ", selected " + selectedItem);
if (position == selectedItem) {
Log.print("Type adapter", "center" + position);
// holder.mTxt_Type.setTextColor(Color.parseColor("#76FF03"));
//holder.mImg_medication.setColorFilter(Color.GREEN);
// holder.mTxt_Type.setTextSize(35);
holder.mImg_medication.getLayoutParams().height = (int) mContext.getResources().getDimension(R.dimen.item_dob_width) + 10;
holder.mImg_medication.getLayoutParams().width = (int) mContext.getResources().getDimension(R.dimen.item_dob_width) + 10;
} else {
holder.mImg_medication.getLayoutParams().height = (int) mContext.getResources().getDimension(R.dimen.item_dob_width) - 10;
holder.mImg_medication.getLayoutParams().width = (int) mContext.getResources().getDimension(R.dimen.item_dob_width) - 10;
// holder.mTxt_Type.setTextColor(Color.WHITE);
//holder.mImg_medication.setColorFilter(null);
// holder.mTxt_Type.setVisibility(View.INVISIBLE);
// holder.mTxt_Type.setTextSize(18);
// holder.mImg_medication.getLayoutParams().height = 70;
// holder.mImg_medication.getLayoutParams().width = 70;
}
} else {
holder.mImg_medication.getLayoutParams().height = (int) mContext.getResources().getDimension(R.dimen.item_dob_width) - 10;
holder.mImg_medication.getLayoutParams().width = (int) mContext.getResources().getDimension(R.dimen.item_dob_width) - 10;
// holder.mTxt_Type.setVisibility(View.INVISIBLE);
holder.mImg_medication.setVisibility(View.INVISIBLE);
}
}
public void setSelecteditem(int selecteditem) {
this.selectedItem = selecteditem;
notifyDataSetChanged();
if (medication_lookBeanArrayList != null && Look_Adapter != null) {
NotifyLookChangetoType(selecteditem);
}
}
public int getSelecteditem() {
return selectedItem;
}
#Override
public int getItemCount() {
return medication_typeBeanArrayList.size();
}
#Override
public int getItemViewType(int position) {
Medication_TypeBean medication_typeBean = medication_typeBeanArrayList.get(position);
if (medication_typeBean.getType() == VIEW_TYPE_PADDING) {
return VIEW_TYPE_PADDING;
} else {
return VIEW_TYPE_ITEM;
}
}
public class ViewHolder extends RecyclerView.ViewHolder {
//public TextView mTxt_Type;
public ImageView mImg_medication;
public ViewHolder(View itemView) {
super(itemView);
// mTxt_Type = (TextView) itemView.findViewById(R.id.mTxt);
mImg_medication = (ImageView) itemView.findViewById(R.id.mImg_medication);
}
}
}
//Type Adapter ends ************************************************

I am not sure I get you properly but you want to change the data of one recyclerview and reset the value of other recyclerview
Try using recyclerView.scrollToPosition(INDEX_YOU_WANT_TO_SCROLL_TO);
IF YOU WANT TO ACHIEVE THE CENTER POSTION OF THE DATA USE
recyclerview.scrollToPosition(arraylist.size()/2);
arrayList in which your drawable data is stored

Dynamically add items in listview

I have an adapter which loads items from the List<> tempList.
At first, the tempList has 10 items. When users scroll to the bottom, 10 more items are added to tempList automatically, by getting items from another List propertyDetailsList.
for (int i = 0; i < 10; i++) {
tempList.add(propertyDetailsList.get(i));
}
propertyDetailsInstantAdapter.notifyDataSetChanged();
However, the result is that only the item at 0 (propertyDetailsList.get(0)) is added to tempList, and it is added 10 times instead....
Whats wrong with my code?
More code:
private ListView propertyList;
private List<PropertyDetails> tempList;
private List<PropertyDetails> propertyDetailsList;
......
propertyDetailsList = getList();
tempList = propertyDetailsList.subList(0, 10);
......
public void showPropertyList() {
propertyList.setAdapter(buildPropertyList());
mIsLoading = false;
propertyList.setOnScrollListener(new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (!mIsLoading && mMoreDataAvailable) {
if (totalItemCount - visibleItemCount - AUTOLOAD_THRESHOLD <= firstVisibleItem) {
mIsLoading = true;
for (int i = 0; i < 10; i++) {
tempList.add(propertyDetailsList.get(10 + i));
}
propertyDetailsInstantAdapter.notifyDataSetChanged();
mIsLoading = false;
}
}
}
});
}
public InstantAdapter<PropertyDetails> buildPropertyList() {
propertyDetailsInstantAdapter = new InstantAdapter<PropertyDetails>(
this, R.layout.property_list_item, PropertyDetails.class, tempList) {
#Override
public View getView(int position, View convertView, ViewGroup parent) {
PropertyListItem propertyListItem;
Context context = parent.getContext();
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.property_list_item, parent, false);
propertyListItem = new PropertyListItem();
propertyListItem.propertyImage = (ImageView) convertView.findViewById(R.id.propertyListImage);
propertyListItem.propertyAddress = (TextView) convertView.findViewById(R.id.propertyListAddress);
propertyListItem.propertyName = (TextView) convertView.findViewById(R.id.propertyListName);
propertyListItem.propertyDetails = this.getItem(position);
convertView.setTag(propertyListItem);
} else {
propertyListItem = (PropertyListItem) convertView.getTag();
}
final PropertyDetails propertyDetails = this.getItem(position);
Transformation transformation = new Transformation() {
#Override
public Bitmap transform(Bitmap source) {
int targetWidth = sp.getInt("deviceWidth", 0);
double aspectRatio = (double) source.getHeight() / (double) source.getWidth();
int targetHeight = (int) (targetWidth * aspectRatio);
Bitmap result = Bitmap.createScaledBitmap(source, targetWidth, targetHeight, false);
if (result != source) {
// Same bitmap is returned if sizes are the same
source.recycle();
}
return result;
}
#Override
public String key() {
return "transformation" + " desiredWidth";
}
};
if (propertyDetails.getImg_link() != null) {
Picasso.with(context)
.load(Uri.parse(propertyDetails.getImg_link()))
.transform(transformation)
.into(propertyListItem.propertyImage);
}
propertyListItem.propertyAddress.setText(propertyDetails.getPropertyAddress());
propertyListItem.propertyName.setText(propertyDetails.getPropertyName());
return convertView;
}
};
return propertyDetailsInstantAdapter;
}

android spilit listview into two columns

public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolderList holder;
if (convertView == null) {
holder = new ViewHolderList();
convertView = LayoutInflater.from(context)
.inflate(R.layout.children_row_list, null);
position=position+2;
Log.d("list position::", ""+position);
holder.img_children_view=(ImageView)convertView.findViewById(R.id.image_children);
holder.text_child_name=(TextView)convertView.findViewById(R.id.text_children_name);
holder.text_child_month=(TextView)convertView.findViewById(R.id.text_children_month);
holder.text_group_name=(TextView)convertView.findViewById(R.id.text_children_group);
holder.img_children_view1=(ImageView)convertView.findViewById(R.id.image_children1);
holder.text_child_name1=(TextView)convertView.findViewById(R.id.text_children_name1);
holder.text_child_month1=(TextView)convertView.findViewById(R.id.text_children_month1);
holder.text_group_name1=(TextView)convertView.findViewById(R.id.text_children_group1);
Resources r = getResources();
float pixels = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 90, r.getDisplayMetrics());
int pixel_height = (int) pixels;
holder.img_children_view.setLayoutParams(new LinearLayout.LayoutParams(80 , 80));
holder.img_children_view1.setLayoutParams(new LinearLayout.LayoutParams(80 , 80));
convertView.setTag(holder);
}
else{
holder = (ViewHolderList) convertView.getTag();
}
if(position %2 == 0){
// System.out.println(position + " is even number.");
holder.text_child_name.setText(children_list.get(position).getFirst_name());
holder.text_child_name.setText(children_list.get(position).getFirst_name());
holder.text_child_month.setText(display_month);
holder.text_group_name.setText(children_list.get(position).getGroup_name());
Bitmap bitmap = decodeFile(new File( Environment.getExternalStorageDirectory()+"/com.x/y/"+children_list.get(position).getPhoto()), ConfigurationData.staffImageSize,ConfigurationData.staffImageSize);
//holder.img_children_view.setImageBitmap(bitmap);
}
else{
// System.out.println(position+ " is odd number.");
holder.text_child_name1.setText(children_list.get(position).getFirst_name());
holder.text_child_name1.setText(children_list.get(position).getFirst_name());
holder.text_child_month1.setText(display_month);
holder.text_group_name1.setText(children_list.get(position).getGroup_name());
Bitmap bitmap1 = decodeFile(new File( Environment.getExternalStorageDirectory()+"/com.x/y/"+children_list.get(position).getPhoto()), ConfigurationData.staffImageSize,ConfigurationData.staffImageSize);
//holder.img_children_view1.setImageBitmap(bitmap1);
}
return convertView;
} //closing getview
}

I suggest using android's GridView with parameter numColumns equals 2
GridView # developer.android.com

Create Gridview with number of columns 2 android:numColumns="2".
In xml:
<GridView
android:id="#+id/sdcard"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_vertical|center_horizontal"
android:gravity="center_vertical|center_horizontal"
android:numColumns="2">
</GridView>
And in java code :
public View getView(int position, View convertView,
ViewGroup parent) {
final ViewHolderList holder;
if (convertView == null) {
holder = new ViewHolderList();
convertView = LayoutInflater.from(context)
.inflate(R.layout.children_row_list, null);
position=position+2;
Log.d("list position::", ""+position);
holder.img_children_view=(ImageView)convertView.findViewById(R.id.image_children);
holder.text_child_name=(TextView)convertView.findViewById(R.id.text_children_name);
holder.text_child_month=(TextView)convertView.findViewById(R.id.text_children_month);
holder.text_group_name=(TextView)convertView.findViewById(R.id.text_children_group);
holder.img_children_view1=(ImageView)convertView.findViewById(R.id.image_children1);
holder.text_child_name1=(TextView)convertView.findViewById(R.id.text_children_name1);
holder.text_child_month1=(TextView)convertView.findViewById(R.id.text_children_month1);
holder.text_group_name1=(TextView)convertView.findViewById(R.id.text_children_group1);
Resources r = getResources();
float pixels = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 90, r.getDisplayMetrics());
int pixel_height = (int) pixels;
holder.img_children_view.setLayoutParams(new LinearLayout.LayoutParams(80 , 80));
holder.img_children_view1.setLayoutParams(new LinearLayout.LayoutParams(80 , 80));
convertView.setTag(holder);
}
else{
holder = (ViewHolderList) convertView.getTag();
}
// System.out.println(position + " is even number.");
holder.text_child_name.setText(children_list.get(position).getFirst_name());
holder.text_child_name.setText(children_list.get(position).getFirst_name());
holder.text_child_month.setText(display_month);
holder.text_group_name.setText(children_list.get(position).getGroup_name());
Bitmap bitmap = decodeFile(new File( Environment.getExternalStorageDirectory()+"/com.x/y/"+children_list.get(position).getPhoto()), ConfigurationData.staffImageSize,ConfigurationData.staffImageSize);
//holder.img_children_view.setImageBitmap(bitmap);
return convertView;
} //closing getview
}

Gridview wrong image when scrolling

I am developing an Android application for tablet which will be used as a catalog of many products (around 10 000).
I display them in a gridview, I only display the 250 first, and if I reach the end of these 250 I load 250 more.
My problem is the pictures. My application seems to work when I scroll not quickly, it is smooth, and there is no problems but it can use 300 or 400 MB of RAM, so I guess I'm doing something badly. I heard that I'm supposed to use WeakReferences but I'm not sure how to use them... That was for the first "problem". (It is not really important since the user may only use this application, and if it works very well... But yes, if I can improve it I will try)
The other big problem here is that when I do something like :
Scroll fast to the bottom
Immediately scroll fast to the top
Some pictures of the "bottom" are displayed on the pictures of the "top" (and not temporarly, they change again only if I scroll and come back at them).
What I know actually :
The mechanism of the griview reuse the views. If I have 10 views visibles, When the 5 first are not visibles, they are used for the 5 next ones that will be visible. I don't know how many view are in this "recycler".
This means that when I scroll to the bottom I see the 5 views which were not visible in the place of the 5 next ones for a few moment then the good views are loaded. To not have this bad effect, I set a picture white (the color of my background) using the method setRecyclerListener().
I don't "recycle" / use the good way to load my pictures and recycle them but don't know how to make it better
I use animations, I don't think there is any link with my problem due to them
I load the pictures in AsyncTask, that seems to work, but the picures are always loaded (in fast scroll too) which is not really a good thing
When scrolling bottom then top quickly sometimes I have the wrong pictures displayed. It may happen in other cases.
public class ProduitsAdapter extends ArrayAdapter<Article> {
private final Activity context;
private ArrayList<Article> params;
private Resources res;
static class ViewHolder {
public TextView numero;
public TextView design;
public ImageView image;
public ImageSwitcher imgSwitcher;
public ImageView codeBarre;
public TextView codeBarreText;
public TextView colisage;
public TextView col3;
public TextView col4;
public TextView col5;
public String image_string = "";
public boolean found = true;
public ImageView nouveaute;
}
public ProduitsAdapter(Activity context, ArrayList<Article> params) {
super(context, R.layout.list_single, params);
res = Catalogue.activity.getResources();
this.context = context;
this.params = params;
}
public int getCount() {
return params.size();
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = convertView;
if (rowView == null) {
LayoutInflater inflater = context.getLayoutInflater();
ViewHolder viewHolder = new ViewHolder();
if (Catalogue.type_aff.equals("list")) {
rowView = inflater.inflate(R.layout.list_single, null);
viewHolder.numero = (TextView) rowView
.findViewById(R.id.numero);
viewHolder.design = (TextView) rowView
.findViewById(R.id.designation);
viewHolder.col3 = (TextView) rowView.findViewById(R.id.col3);
viewHolder.col4 = (TextView) rowView.findViewById(R.id.col4);
viewHolder.col5 = (TextView) rowView.findViewById(R.id.col5);
} else {
rowView = inflater.inflate(R.layout.fragment_grid_item, null);
viewHolder.numero = (TextView) rowView
.findViewById(R.id.numero);
viewHolder.design = (TextView) rowView
.findViewById(R.id.designation);
viewHolder.colisage = (TextView) rowView
.findViewById(R.id.grid_colisage);
viewHolder.codeBarre = (ImageView) rowView
.findViewById(R.id.code_barre);
viewHolder.codeBarreText = (TextView) rowView
.findViewById(R.id.code_barre_text);
viewHolder.nouveaute = (ImageView) rowView
.findViewById(R.id.img_nouveaute);
}
viewHolder.image = (ImageView) rowView.findViewById(R.id.img);
rowView.setTag(viewHolder);
}
ViewHolder holder = (ViewHolder) rowView.getTag();
if (Catalogue.type_aff.equals("list")) {
holder.col3.setText(params.get(position).getColonne_pref(3));
holder.col4.setText(params.get(position).getColonne_pref(4));
holder.col5.setText(params.get(position).getColonne_pref(5));
} else {
if (params.get(position).isNouveaute()) {
holder.nouveaute.setImageResource(R.drawable.nouveaute);
holder.nouveaute.setVisibility(ImageView.VISIBLE);
} else
holder.nouveaute.setVisibility(ImageView.GONE);
holder.colisage.setText(params.get(position).getColisage());
if (ProduitsFragment.barcodeVisible) {
holder.codeBarreText.setText(params.get(position)
.getGencodNegoce());
}
}
holder.numero.setText(params.get(position).getCodeArt());
holder.design.setText(params.get(position).getDesignation_pref());
// This is how I store my pictures, because finding one picture in a folder of 10 000 pictures takes too much time
String pattern_deb = holder.numero.getText() + "";
String chemin = Environment.getExternalStorageDirectory().getPath()
+ res.getString(R.string.chemin_app_data)
+ MainActivity.listDossiersSocietes
.get(MainActivity.societeSelected)
+ res.getString(R.string.chemin_dossier_photos);
for (int i = 0; i < pattern_deb.length() - 2; i++) {
chemin += "/" + pattern_deb.charAt(i);
}
chemin += "/";
File f = new File(chemin + params.get(position).getFichierPhoto());
if (f.exists()) {
holder.image_string = f.getAbsolutePath();
new loadImagesFromFileThread(holder, position).execute();
if (!Catalogue.type_aff.equals("list")
&& ProduitsFragment.barcodeVisible)
new loadBarCodeThread(holder, position).execute();
} else {
holder.image.setImageResource(R.drawable.notfound300);
}
return rowView;
}
private BitmapDrawable loadImagesFromFile(ViewHolder holder, int position) {
holder.found = true;
File bmp = new File(holder.image_string);
if (bmp.exists() && !bmp.isDirectory()) {
if (position < ProduitsFragment.gridView.getFirstVisiblePosition()
&& position > ProduitsFragment.gridView
.getLastVisiblePosition()) {
holder.found = false;
return null;
} else {
if (holder.image.getVisibility() == ImageView.VISIBLE) {
holder.found = false;
return null;
}
}
Bitmap myBitmap = BitmapFactory.decodeFile(bmp.getAbsolutePath());
int width = myBitmap.getWidth();
int height = myBitmap.getHeight();
int newWidth = 200;
int newHeight = 200;
if (Catalogue.type_aff.equals("list")) {
newWidth = 40;
newHeight = 40;
} else {
if (Catalogue.nbGrid == 5) {
newWidth = 200;
newHeight = 200;
}
if (Catalogue.nbGrid == 3) {
newWidth = 300;
newHeight = 300;
}
}
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
Bitmap resizedBitmap = Bitmap.createBitmap(myBitmap, 0, 0, width,
height, matrix, true);
BitmapDrawable bmd = new BitmapDrawable(context.getResources(),
resizedBitmap);
return bmd;
} else {
holder.found = false;
return null;
}
}
private class loadImagesFromFileThread extends
AsyncTask<Void, Void, BitmapDrawable> {
ViewHolder holder;
int position;
public loadImagesFromFileThread(ViewHolder holder, int position) {
this.holder = holder;
this.position = position;
this.holder.image.setVisibility(ImageView.INVISIBLE);
}
#Override
protected BitmapDrawable doInBackground(Void... params) {
return loadImagesFromFile(holder, position);
}
#Override
protected void onPostExecute(BitmapDrawable bmd) {
if (ProduitsFragment.isNotScrolling) {
if (bmd != null) {
holder.image.setImageDrawable(bmd);
if (holder.image.getVisibility() != ImageView.VISIBLE
&& !(position < ProduitsFragment.gridView
.getFirstVisiblePosition() && position > ProduitsFragment.gridView
.getLastVisiblePosition())) {
Animation fadeIn = new AlphaAnimation(0, 1);
fadeIn.setInterpolator(new DecelerateInterpolator());
fadeIn.setDuration(500);
fadeIn.setStartOffset(500);
holder.image.startAnimation(fadeIn);
holder.image.setVisibility(ImageView.VISIBLE);
}
} else {
if (position < ProduitsFragment.gridView
.getFirstVisiblePosition()
&& position > ProduitsFragment.gridView
.getLastVisiblePosition()) {
Log.e("DEBUG", "...");
} else {
if (holder.image.getVisibility() != ImageView.VISIBLE) {
if (!holder.found) {
if (Catalogue.type_aff.equals("list")) {
holder.image
.setImageResource(R.drawable.notfound40);
} else {
if (Catalogue.nbGrid == 5) {
holder.image
.setImageResource(R.drawable.notfound200);
}
if (Catalogue.nbGrid == 3) {
holder.image
.setImageResource(R.drawable.notfound300);
}
}
Animation fadeIn = new AlphaAnimation(0, 1);
fadeIn.setInterpolator(new DecelerateInterpolator());
fadeIn.setDuration(500);
holder.image.startAnimation(fadeIn);
holder.image.setVisibility(ImageView.VISIBLE);
} else {
Animation fadeIn = new AlphaAnimation(0, 1);
fadeIn.setInterpolator(new DecelerateInterpolator());
fadeIn.setDuration(500);
holder.image.startAnimation(fadeIn);
}
holder.image.setVisibility(ImageView.VISIBLE);
}
}
}
}
}
}
}
I would appreciate any help to correct the problem of the wrong pictures, and if anyone can explain me how to load them properly with some code if possible (without using 300 MB of RAM) that would be really nice.

Android gridview view cast exception

I create gridview with sectionviews and have some problems with it
#Override
public View getView(int position, View convertView, ViewGroup parent) {
int size = mArray.get(0).size();
int z = size + (COLUMNS_NUM * 2);
//sectionView
if (position < (COLUMNS_NUM * 2) || (position > (z -1) && position < (z + COLUMNS_NUM))) {
if(position == COLUMNS_NUM ){
return header(R.string.grid_last_added, convertView);
}
if(position == z){
return header(R.string.grid_last_added, convertView);
}
if (convertView == null) {
convertView = new View(mContext);
}
// Set empty view with height of ActionBar
convertView.setLayoutParams(new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, mActionBarHeight));
if(position == COLUMNS_NUM || position == z){
convertView.setLayoutParams(new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, mActionBarHeight - 15));
}
return convertView;
}
View v = convertView;
if(v == null){
v = LayoutInflater.from(mContext).inflate(R.layout.player_movie, null);
v.setLayoutParams(mImageViewLayoutParams);
}
TextView title = (TextView) v.findViewById(R.id.serial_title);
TextView seria = (TextView) v.findViewById(R.id.when);
ImageView poster = (ImageView) v.findViewById(R.id.poster);
//Offten.debug(getCount(), position);
int x = (position - (COLUMNS_NUM * 2) )< mArray.get(0).size() ? position - (COLUMNS_NUM * 2) : position - (z + COLUMNS_NUM);
int y = (position - (COLUMNS_NUM * 2) )< mArray.get(0).size() ? 0 : 1;
// Offten.debug(x + " " + (position < mArray.get(0).size() ? "true" : "false") + " " + mArray.get(0).size());
//Offten.debug( Boolean.toString((position - (COLUMNS_NUM * 2) )< mArray.get(0).size()) + " " + x + " " + z);
Serial serial = mArray.get(y).get(x);
title.setText(serial.getTitle());
seria.setText(serial.getSeria());
mFetcher.loadImage( serial.getPoster(), poster);
if(v.getLayoutParams().height != mItemHeight){
v.setLayoutParams(mImageViewLayoutParams);
}
return v;
}
public TextView header(int message, View convertView){
TextView view = (TextView) convertView; // issue with cast exception
if(view == null){
view = new TextView(mContext);
}
view.setText(underline(mContext.getResources().getString(message)));
view.setTextSize(18);
view.setTypeface(typeface, Typeface.BOLD_ITALIC);
view.setTextColor(Color.WHITE);
view.setGravity(Gravity.CENTER_VERTICAL);
view.setLayoutParams(new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, mActionBarHeight - 15));
return view;
}
With this code i always have issue with cast exception in my header TextView. (View cannot be cast to TextView)
#Override
public int getViewTypeCount() {
// Two types of views, the normal ImageView and the top row of empty views
return 2;
}
#Override
public int getCount() {
int size = 0;
for(List<Serial> s : mArray){
size += s.size() + COLUMNS_NUM;
}
return size > 0 ? size + COLUMNS_NUM : size;
}
#Override
public int getItemViewType(int position) {
int size = mArray.get(0).size();
int z = size + (COLUMNS_NUM * 2);
return position < (COLUMNS_NUM * 2) || (position > (z -1) && position < (z + COLUMNS_NUM)) ? 1 : 0;
}
can i solve my problem??

Do like this
public TextView header(int message, View convertView){
TextView view = (TextView) convertView.findViewById(R.id.<textviewId>); // issue with cast exception
if(view == null){
view = new TextView(mContext);
}
view.setText(underline(mContext.getResources().getString(message)));
view.setTextSize(18);
view.setTypeface(typeface, Typeface.BOLD_ITALIC);
view.setTextColor(Color.WHITE);
view.setGravity(Gravity.CENTER_VERTICAL);
view.setLayoutParams(new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, mActionBarHeight - 15));
return view;
}

So i fount answer for my question! i have 3 difference view, but i declareted only 2, and i had problems! Thanks for all to helping!
#Override
public int getItemViewType(int position) {
int size = mArray.get(0).size();
int z = size + (COLUMNS_NUM * 2);
if (position < (COLUMNS_NUM * 2) || (position > (z -1) && position < (z + COLUMNS_NUM))) {
if(position == COLUMNS_NUM || position == z){
return 1;
}
return 2;
}
return 0;
}
#Override
public int getViewTypeCount() {
// Two types of views, the normal ImageView and the top row of empty views
return 3;
}