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Textview cannot set text but Imageview working

I have some problem with my code. I cannot set Textview but ImageView is working. This is my xml textview. I using adapter and listener interface.
error : textview on a null object reference
<?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:descendantFocusability="blocksDescendants"
android:orientation="vertical"
xmlns:app="http://schemas.android.com/apk/res-auto">
<View
android:layout_width="match_parent"
android:layout_height="#dimen/spacing_middle" />
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/spacing_middle"
android:layout_marginRight="#dimen/spacing_middle"
android:visibility="visible"
app:cardCornerRadius="0dp"
app:cardElevation="4dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/spacing_medium"
android:layout_marginLeft="#dimen/spacing_large"
android:layout_marginRight="#dimen/spacing_large"
android:layout_marginTop="#dimen/spacing_large"
android:gravity="center_vertical"
android:orientation="horizontal">
<com.mikhaellopez.circularimageview.CircularImageView
android:id="#+id/imgGambar"
android:layout_width="#dimen/spacing_xxlarge"
android:layout_height="#dimen/spacing_xxlarge"
android:foreground="#color/overlay_light_20"
app:civ_shadow="true"
app:civ_shadow_radius="0"
android:src="#drawable/photo_female_2"
app:civ_border="false" />
<View
android:layout_width="#dimen/spacing_large"
android:layout_height="0dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/tvName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="Emma Richmond"
android:textAppearance="#style/TextAppearance.AppCompat.Subhead"
android:textColor="#color/grey_90" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/spacing_small"
android:orientation="horizontal">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="in "
android:textAppearance="#style/TextAppearance.AppCompat.Caption"
android:textColor="#color/grey_40" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="Hwy, Carthage"
android:textAppearance="#style/TextAppearance.AppCompat.Caption"
android:textColor="#color/light_blue_400"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
<TextView
android:id="#+id/tvKonten"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/spacing_large"
android:lineSpacingExtra="4dp"
android:text="#string/middle_lorem_ipsum"
android:textAppearance="#style/TextAppearance.AppCompat.Caption"
android:textColor="#color/grey_60" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="#dimen/spacing_medium"
android:background="#color/grey_5" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="#dimen/spacing_xxlarge"
android:gravity="center_vertical"
android:orientation="horizontal"
android:paddingLeft="#dimen/spacing_large"
android:paddingRight="#dimen/spacing_large">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<ImageView
android:id="#+id/imgLike"
android:layout_width="#dimen/spacing_mlarge"
android:layout_height="#dimen/spacing_mlarge"
android:layout_marginEnd="#dimen/spacing_middle"
android:layout_marginRight="#dimen/spacing_middle"
android:tint="#color/light_green_300"
android:src="#drawable/ic_thumb_up" />
<TextView
android:id="#+id/txtsuka"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="12 likes"
android:textAppearance="#style/TextAppearance.AppCompat.Caption"
android:textColor="#color/grey_40" />
</LinearLayout>
<View
android:layout_width="#dimen/spacing_large"
android:layout_height="0dp" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical"
android:orientation="horizontal">
<ImageView
android:layout_width="#dimen/spacing_mlarge"
android:layout_height="#dimen/spacing_mlarge"
android:layout_marginEnd="#dimen/spacing_middle"
android:layout_marginRight="#dimen/spacing_middle"
android:tint="#color/light_blue_400"
android:src="#drawable/ic_textsms" />
<TextView
android:id="#+id/tvKomentar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="4 Comments"
android:textAppearance="#style/TextAppearance.AppCompat.Caption"
android:textColor="#color/grey_40" />
</LinearLayout>
<TextView
android:id="#+id/tvLalu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="end|right"
android:text="2h ago"
android:textAppearance="#style/TextAppearance.AppCompat.Body1"
android:textColor="#color/grey_40" />
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
and this is my adapter : https://pastebin.com/csiW52h4
public class AdapterCardPostList extends RecyclerView.Adapter<AdapterCardPostList.ViewHolder> {
private Context context;
private List<PostItem> list;
private List<Check> checkList;
private OnItemClickListener mOnItemClickListener;
public AdapterCardPostList(Context context, List<PostItem> list, List<Check> checkList, OnItemClickListener monItemClickListener) {
this.context = context;
this.list = list;
this.checkList = checkList;
this.mOnItemClickListener = monItemClickListener;
}
public class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public ImageView image, imglike;
public TextView name;
public TextView konten;
public TextView like;
public TextView komentar;
public TextView lalu;
public ViewHolder(View v) {
super(v);
image = (ImageView) v.findViewById(R.id.imgGambar);
name = (TextView) v.findViewById(R.id.tvName);
konten = (TextView) v.findViewById(R.id.tvKonten);
like = (TextView) v.findViewById(R.id.txtsuka);
komentar = (TextView) v.findViewById(R.id.tvKomentar);
lalu = (TextView) v.findViewById(R.id.tvLalu);
imglike = (ImageView) v.findViewById(R.id.imgLike);
imglike.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mOnItemClickListener.onItemClick(view, checkList.get(getAdapterPosition()), getAdapterPosition(), list.get(getAdapterPosition()));
}
});
}
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View v = layoutInflater.inflate(R.layout.item_post, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(ViewHolder holder, final int position) {
PostItem p = list.get(position);
holder.konten.setText(p.getContent());
holder.like.setText(p.getLike());
holder.name.setText(p.getName());
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
try {
// long time = sdf.parse(p.getTanggal()).getTime();
Date date = sdf.parse(p.getTanggal());
long now = System.currentTimeMillis();
CharSequence ago =
DateUtils.getRelativeTimeSpanString(date.getTime(), now, DateUtils.MINUTE_IN_MILLIS);
holder.lalu.setText(ago);
} catch (ParseException e) {
e.printStackTrace();
Toast.makeText(context, e.getMessage(), Toast.LENGTH_SHORT).show();
}
holder.komentar.setText(p.getKomen() + " Comments");
Glide.with(context).load("https://graph.facebook.com/" + p.getUid() + "/picture?type=normal").into(holder.image);
if (p.getUid().equals(MainActivity.id)){
holder.imglike.setColorFilter(ContextCompat.getColor(context, R.color.red_200), android.graphics.PorterDuff.Mode.MULTIPLY);
checkList.add(new Check(true));
}else{
holder.imglike.setColorFilter(ContextCompat.getColor(context, R.color.light_green_300), android.graphics.PorterDuff.Mode.MULTIPLY);
checkList.add(new Check(false));
}
}
#Override
public int getItemCount() {
return list.size();
}
}
my error like this
why my imageview working but textview not working
thank you for attention

mOnItemClickListener.onItemClick(view, checkList.get(getAdapterPosition()), getAdapterPosition(), list.get(getAdapterPosition()));
change to
mOnItemClickListener.onItemClick(v, checkList.get(getAdapterPosition()), getAdapterPosition(), list.get(getAdapterPosition()));

This is because the id tvKonten does not exist. In your XML code, the id of the TextView is txtsuka, not tvKonten. Change tvKonten to txtsuka.

Try these options, it might work for you :
Invalidate Caches and Restart
Check if you have a different version of the same layout file in your res folder such as ...v26.xml or something like that ; if you find any then delete the unwanted version of the file.

How to get total of all items in recycler view

I have recycler view and spinner in activity depending on spinner value post request has been sent to server after which recycler view populated in which every row have some cost. I want to add this cost of every row.
Screenshot is given below:
In screenshot we can see No. of quantities are 2 which cost 40 like this other row also have some value.SO I want to add all these costs from each row and showing it in lower left area where ToTAL is written.
Here is my code:
activity_select_pack.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".SelectPack">
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/progress"
android:layout_centerInParent="true"/>
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="100dp"
app:cardUseCompatPadding="true"
app:cardCornerRadius="3dp"
android:layout_margin="16dp"
android:id="#+id/marketCard"
app:cardBackgroundColor="#color/colorPrimary">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="8dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#fff"
android:textSize="15sp"
android:id="#+id/textMarket"
android:text="Select Market Name"/>
<Spinner
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="2dp"
android:layout_below="#+id/textMarket"
android:id="#+id/marketSpinner"
android:layout_marginTop="25dp"
android:background="#drawable/spinner_back"/>
</RelativeLayout>
</androidx.cardview.widget.CardView>
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:id="#+id/products"
android:layout_below="#+id/marketCard"
android:visibility="invisible"
android:layout_above="#+id/totalLayout"
android:layout_marginBottom="3dp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignParentBottom="true"
android:background="#color/colorPrimary"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:id="#+id/totalLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="40dp"
android:padding="10dp"
android:background="#drawable/spinner_back"
android:text="Total:00.00"
android:layout_centerVertical="true"/>
<Button
android:layout_width="wrap_content"
android:layout_height="40dp"
android:padding="8dp"
android:background="#drawable/login_but"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:text="Generate bill"
android:textSize="12sp"
android:textColor="#fff"/>
</RelativeLayout>
</RelativeLayout>
selectpack_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="3dp"
app:cardUseCompatPadding="true"
app:cardBackgroundColor="#fff">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Crown"
android:layout_margin="10dp"
android:id="#+id/marketName"
android:textSize="18sp"
android:textColor="#color/colorPrimary"/>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:id="#+id/view1"
android:layout_below="#+id/marketName"
android:background="#adadad"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Product No."/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="300"
android:id="#+id/productNo"
android:textColor="#color/colorPrimary"
android:layout_alignParentRight="true"/>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:layout_marginTop="10dp"
android:layout_below="#+id/productNo"
android:background="#adadad"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Page"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="300"
android:id="#+id/page"
android:textColor="#color/colorPrimary"
android:layout_alignParentRight="true"/>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:layout_marginTop="10dp"
android:layout_below="#+id/page"
android:background="#adadad"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MRP"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="300"
android:id="#+id/mrp"
android:textColor="#color/colorPrimary"
android:layout_alignParentRight="true"/>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:layout_marginTop="10dp"
android:layout_below="#+id/mrp"
android:background="#adadad"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Inner pack"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="300"
android:id="#+id/innerPack"
android:textColor="#color/colorPrimary"
android:layout_alignParentRight="true"/>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:layout_marginTop="10dp"
android:layout_below="#+id/innerPack"
android:background="#adadad"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Outer pack"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="300"
android:id="#+id/outerPack"
android:textColor="#color/colorPrimary"
android:layout_alignParentRight="true"/>
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:layout_marginTop="10dp"
android:layout_below="#+id/innerPack"
android:background="#adadad"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp">
<Spinner
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:id="#+id/qtySpinner"
android:background="#drawable/qty_spinner"
android:layout_weight="1"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TOTAL"
android:id="#+id/total"
android:layout_weight="1"/>
<Button
android:layout_width="50dp"
android:layout_height="30dp"
android:text="ORDER"
android:id="#+id/order"
android:textColor="#fff"
android:background="#drawable/login_but"
android:layout_weight="1"/>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
SelectPack.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_select_pack);
fAuth = FirebaseAuth.getInstance();
ActionBar ab = getSupportActionBar();
assert ab!= null;
ab.setTitle("Select Pack");
ab.setDisplayHomeAsUpEnabled(true);
marketSpinner = findViewById(R.id.marketSpinner);
progress = findViewById(R.id.progress);
products = findViewById(R.id.products);
products.setHasFixedSize(true);
products.setLayoutManager(new LinearLayoutManager(this));
productList = new ArrayList<>();
List<String> categories = new ArrayList<String>();
categories.add("Select market");
categories.add("Crown");
categories.add("Long Book A4");
categories.add("Long Book");
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, categories);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
marketSpinner.setAdapter(dataAdapter);
marketSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
String item = adapterView.getItemAtPosition(i).toString();
if(item.equals("Select market")){
progress.setVisibility(View.INVISIBLE);
}
else{
getData(item);
}
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
}
private void getData(String item){
progress.setVisibility(View.VISIBLE);
products.setVisibility(View.INVISIBLE);
productList.clear();
OkHttpClient client = new OkHttpClient.Builder()
.connectTimeout(20, TimeUnit.SECONDS)
.readTimeout(20,TimeUnit.SECONDS)
.writeTimeout(20,TimeUnit.SECONDS)
.build();
RequestBody formBody = new FormBody.Builder()
.add("name",item)
.build();
Request request = new Request.Builder().post(formBody).url(URL).build();
client.newCall(request).enqueue(new Callback() {
#Override
public void onResponse(#NotNull Call call, #NotNull final Response response) throws IOException {
runOnUiThread(new Runnable() {
#Override
public void run() {
try {
JSONArray jsonArray = new JSONArray(response.body().string());
if(jsonArray.length() > 0){
products.setVisibility(View.VISIBLE);
progress.setVisibility(View.INVISIBLE);
}
for(int i=0;i<jsonArray.length();i++){
progress.setVisibility(View.INVISIBLE);
JSONObject object = jsonArray.getJSONObject(i);
String str1 = object.getString("market");
String str2 = object.getString("product_no");
String str3 = object.getString("page");
String str4 = object.getString("mrp");
String str5 = object.getString("inner_pack");
String str6 = object.getString("outer_pack");
Log.d("prod",str2);
ProductsModel model = new ProductsModel(str1,str2,str3,str4,str5,str6);
productList.add(model);
}
ProductAdapter adapter = new ProductAdapter(getApplicationContext(),productList);
products.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
#Override
public void onFailure(#NotNull Call call, #NotNull final IOException e) {
runOnUiThread(new Runnable() {
#Override
public void run() {
progress.setVisibility(View.INVISIBLE);
products.setVisibility(View.INVISIBLE);
Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_SHORT).show();
}
});
}
});
}
ProductAdapter.java
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ViewHolder> {
private Context context;
private List<ProductsModel> productList;
public ProductAdapter(Context context, List<ProductsModel> productList) {
this.context = context;
this.productList = productList;
}
#NonNull
#Override
public ProductAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.selectpack_layout,parent,false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(#NonNull final ProductAdapter.ViewHolder holder, int position) {
final ProductsModel model = productList.get(position);
holder.marketName.setText(model.getMarketName());
holder.productNo.setText(model.getProductNo());
holder.page.setText(model.getPage());
holder.mrp.setText(model.getMrp());
holder.innerPack.setText(model.getInnerPack());
holder.outerPack.setText(model.getOuterPack());
List<String> qty = new ArrayList<>();
qty.add("Select qty");
qty.add("1");
qty.add("2");
qty.add("3");
qty.add("4");
qty.add("5");
qty.add("6");
qty.add("7");
qty.add("8");
qty.add("9");
qty.add("10");
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_item, qty);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
holder.qtySpinner.setAdapter(dataAdapter);
holder.qtySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
String item = adapterView.getItemAtPosition(i).toString();
if(!item.equals("Select qty")){
int qty = Integer.parseInt(item);
int cost = Integer.parseInt(model.getMrp());
int val = cost * qty;
holder.total.setText(String.valueOf(val));
}
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
}
#Override
public int getItemCount() {
return productList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
TextView marketName,productNo,page,mrp,innerPack,outerPack,total;
Spinner qtySpinner;
Button order;
public ViewHolder(#NonNull View itemView) {
super(itemView);
order = itemView.findViewById(R.id.order);
qtySpinner = itemView.findViewById(R.id.qtySpinner);
marketName = itemView.findViewById(R.id.marketName);
productNo = itemView.findViewById(R.id.productNo);
page = itemView.findViewById(R.id.page);
mrp = itemView.findViewById(R.id.mrp);
innerPack = itemView.findViewById(R.id.innerPack);
outerPack = itemView.findViewById(R.id.outerPack);
total = itemView.findViewById(R.id.total);
}
}
}
Someone please let me know how can I get and add total cost from each row and show it in lower left area. Any help would be appreciated.
THANKS

You can use array and append the value of each cell in it and never clear it, then create a function in your adapter that return with this array, here you cal add it's items.

Dynamic number of LinearLayouts in Android Studio

In my android app I want to display a HorizontalScrollView with a dynamic number of images. Currently I have to build a LinearLayout for each Image. Is there a way to do it dynamically with a list of URLs and appropriate the quantity of LinearLayouts of the length of this list?
enclosed my current code
activity_mail.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.post.scollagainandagain.MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="178dp"
android:text="Fotos hinzufügen" />
<HorizontalScrollView
android:id="#+id/hz"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_below="#+id/textView"
android:layout_marginTop="208dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/ll1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/iv1"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="#color/colorSeperator" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/ll2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/iv2"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="#color/colorSeperator" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/ll3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/iv3"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="#color/colorSeperator" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/ll4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/iv4"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="#color/colorSeperator" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/ll5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/iv5"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="#color/colorSeperator" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/ll6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/iv6"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="0.5dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="#color/colorSeperator" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
</HorizontalScrollView>
</RelativeLayout>
MainActivity.java:
public class MainActivity extends AppCompatActivity {
ImageView iv1, iv2, iv3, iv4, iv5, iv6;
LinearLayout ll1, ll2, ll3, ll4, ll5, ll6;
HorizontalScrollView hz;
int scrollViewHeigth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iv1 = (ImageView) findViewById(R.id.iv1);
iv2 = (ImageView) findViewById(R.id.iv2);
iv3 = (ImageView) findViewById(R.id.iv3);
iv4 = (ImageView) findViewById(R.id.iv4);
iv5 = (ImageView) findViewById(R.id.iv5);
iv6 = (ImageView) findViewById(R.id.iv6);
ll1 = (LinearLayout) findViewById(R.id.ll1);
ll2 = (LinearLayout) findViewById(R.id.ll2);
ll3 = (LinearLayout) findViewById(R.id.ll3);
ll4 = (LinearLayout) findViewById(R.id.ll4);
ll5 = (LinearLayout) findViewById(R.id.ll5);
ll6 = (LinearLayout) findViewById(R.id.ll6);
hz = (HorizontalScrollView) findViewById(R.id.hz);
ViewTreeObserver vto = hz.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
scrollViewHeigth = hz.getHeight();
}
});
GetImage getimage1 = new GetImage("1/1.png", iv1, ll1);
getimage1.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
GetImage getimage2 = new GetImage("1/2.png", iv2, ll2);
getimage2.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
GetImage getimage3 = new GetImage("1/3.png", iv3, ll3);
getimage3.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
GetImage getimage4 = new GetImage("1/4.png", iv4, ll4);
getimage4.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
GetImage getimage5 = new GetImage("1/5.png", iv5, ll5);
getimage5.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
GetImage getimage6 = new GetImage("1/6.png", iv6, ll6);
getimage6.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}
private class GetImage extends AsyncTask<Void, Void, Boolean> {
String url;
ImageView iv;
LinearLayout ll;
Bitmap bitmap;
public GetImage (String url, ImageView iv, LinearLayout ll) {
this.iv = iv;
this.url = "https://url.url.com/app/images/" + url;
this.ll = ll;
}
#Override
protected Boolean doInBackground(Void... params) {
try {
bitmap = BitmapFactory.decodeStream((InputStream)new URL(url).getContent());
MainActivity.this.runOnUiThread(new Runnable() {
public void run() {
double srcollHeight = scrollViewHeigth;
double bitmapHeight = bitmap.getHeight();
double bitmapWidth = bitmap.getWidth();
double width = srcollHeight/bitmapHeight*bitmapWidth;
iv.setImageBitmap(bitmap);
ll.setLayoutParams(new LayoutParams((int) width, LayoutParams.WRAP_CONTENT));
}
});
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
}
}
}
Can you help me?

The correct way to solve this error would be using a RecyclerView along with an Adapter.
Recyclerview was built specifically for this task where you have a dynamic number of items which you want to be displayed on your screen.
If you want to get started with RecyclerView, check this link out :
http://www.theappguruz.com/blog/learn-recyclerview-with-an-example-in-android

Android List View shows items, but text is empty

I am experiencing a very weird issue where I am unable to view any text/data, but it clearly shows the number of items in the list.
I have confirmed that dataList has data, and I am able to get the exact same string that I set after debugging.
Parent Fragment:
ListView InboxListView = (ListView) view.findViewById(R.id.listViewInbox);
InboxAdapter adapter = new InboxAdapter(mActivity, R.layout.activity_inbox_item, dataList, NotificationInbox.this);
XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/SwipeContainer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:layout_width="match_parent"
android:padding="15dp"
android:id="#+id/searchBarInbox"
android:hint="Search"
android:layout_height="wrap_content" />
<ListView
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="match_parent"
android:layout_marginTop="49dp"
android:id="#+id/listViewInbox" />
</RelativeLayout>
</android.support.v4.widget.SwipeRefreshLayout>
Adapter: http://pastebin.com/mSUrdLcW << CLICK
public class InboxAdapter extends ArrayAdapter<InboxBO> {
NotificationInbox fragment;
Context context;
List<InboxBO> inboxForSharedPref;
List<InboxBO> inboxList;
int layoutResID;
SharedPreferences prefs;
private ArrayList<InboxBO> inboxarraylist;
private SparseBooleanArray mSelectedItemIds;
public InboxAdapter(Context context, int layoutResourceID, List<InboxBO> objs, NotificationInbox fragment) {
super(context, layoutResourceID, objs);
mSelectedItemIds = new SparseBooleanArray();
this.context = context;
this.inboxList = objs;
this.layoutResID = layoutResourceID;
this.inboxarraylist = new ArrayList<InboxBO>();
this.inboxarraylist.addAll(inboxList);
this.fragment = fragment;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
inboxHolder inboxholder;
View view = convertView;
if (view == null) {
view = ((LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(layoutResID, parent, false);
//LayoutInflater inflater = ((LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE));
//LayoutInflater inflater = LayoutInflater.from(getContext());
//inflater.inflate(R.layout.activity_inbox_item, null);
inboxholder = new inboxHolder();
//view = inflater.inflate(layoutResID, parent, false);
prefs = context.getSharedPreferences(
Constants.PREF_NAME, 0);
inboxholder.swipeLayout = (SwipeLayout)view.findViewById(R.id.swipe_layout);
inboxholder.senderNameText = (TextView) view.findViewById(R.id.senderNameText);
inboxholder.pushDateText = (TextView) view.findViewById(R.id.pushDateText);
inboxholder.pushTimeText = (TextView) view.findViewById(R.id.pushTimeText);
inboxholder.messageText = (TextView) view.findViewById(R.id.messageText);
inboxholder.delete = (TextView)view.findViewById(R.id.delete);
inboxholder.itemLayout = (RelativeLayout) view.findViewById(R.id.relativeViewInbox);
inboxholder.swipeLayout.setShowMode(SwipeLayout.ShowMode.PullOut);
inboxholder.delete.setOnClickListener(onDeleteListener(position, inboxholder));
view.setTag(inboxholder);
}
else {
inboxholder = (inboxHolder) view.getTag();
}
InboxBO mItem = inboxList.get(position);
if(mItem!=null){
inboxholder.senderNameText.setText((String)mItem.getTitle());
inboxholder.pushDateText.setText(new Date().toString());
inboxholder.pushTimeText.setText(new Date().toString());
inboxholder.messageText.setText((String)mItem.getMessage());
}
return view;
}
// For swipe action
private View.OnClickListener onDeleteListener(final int position, final inboxHolder holder) {
return new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder alert = new AlertDialog.Builder(
context);
alert.setTitle("Delete Message");
alert.setMessage("Are you sure you wish to delete this message?");
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
inboxList.remove(position);
Gson gson = new Gson();
inboxForSharedPref = fragment.getStoredMessages();
inboxForSharedPref = inboxList;
String jsonSavePref = gson.toJson(inboxForSharedPref);
fragment.commitToStoredList(jsonSavePref);
Toast.makeText(context, "Message Deleted!",
Toast.LENGTH_SHORT).show();
holder.swipeLayout.close();
fragment.retrieveMessage();
dialog.dismiss();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alert.show();
}
};
}
// Algorithm to filter out listview based on text changed in listview searchbox
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
inboxList.clear();
if (charText.length() == 0) {
inboxList.addAll(inboxarraylist);
}
else
{
for (InboxBO ilist : inboxarraylist)
{
/*if (ilist.getDate().toLowerCase(Locale.getDefault()).contains(charText) || ilist.getMessage().toLowerCase(Locale.getDefault()).contains(charText) || ilist.getSendername().toLowerCase(Locale.getDefault()).contains(charText))
{
inboxList.add(ilist);
}*/
if(ilist.getTitle().toLowerCase(Locale.getDefault()).contains(charText) || ilist.getMessage().toLowerCase(Locale.getDefault()).contains(charText) ){
inboxList.add(ilist);
}
}
}
notifyDataSetChanged();
}
public static class inboxHolder {
TextView senderNameText, pushDateText, pushTimeText, messageText, delete, title;
RelativeLayout itemLayout;
private SwipeLayout swipeLayout;
}
// Methods below are for multi-deletion
public void toggleSelection(int position) {
selectView(position, !mSelectedItemIds.get(position));
}
// Remove selection after unchecked
public void remove(InboxBO object) {
inboxList.remove(object);
Gson gson = new Gson();
inboxForSharedPref = fragment.getStoredMessages();
inboxForSharedPref = inboxList;
String jsonSavePref = gson.toJson(inboxForSharedPref);
fragment.commitToStoredList(jsonSavePref);
notifyDataSetChanged();
}
// Item checked on selection
public void selectView(int position, boolean value) {
if (value)
mSelectedItemIds.put(position, value);
else
mSelectedItemIds.delete(position);
notifyDataSetChanged();
}
// Get number of selected item
public int getSelectedCount() {
return mSelectedItemIds.size();
}
public SparseBooleanArray getSelectedIds() {
return mSelectedItemIds;
}
public void removeSelection() {
mSelectedItemIds = new SparseBooleanArray();
notifyDataSetChanged();
}
}
Adapter XML:
<?xml version="1.0" encoding="utf-8"?>
<com.daimajia.swipe.SwipeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/swipe_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/bottom_wrapper"
android:layout_width="100dp"
android:layout_gravity="start"
android:layout_height="match_parent"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#ff0000">
<TextView
android:id="#+id/delete"
android:text="Delete"
android:textSize="18sp"
android:textColor="#color/black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
</RelativeLayout>
</LinearLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="10dp"
android:background="?android:attr/activatedBackgroundIndicator"
android:orientation="vertical"
android:layout_width="match_parent"
android:id="#+id/relativeViewInbox"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical|center_horizontal"
android:orientation="horizontal"
android:id="#+id/linearLayout">
<TextView
android:layout_width="match_parent"
android:text="SenderName"
android:textColor="#color/black"
android:textAppearance="?android:attr/textAppearanceMedium"
android:gravity="left"
android:layout_weight="1"
android:layout_height="match_parent"
android:id="#+id/senderNameText"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:text="PushDate"
android:gravity="right"
android:textColor="#color/black"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_weight="1"
android:layout_height="match_parent"
android:id="#+id/pushDateText" />
</LinearLayout>
<TextView
android:layout_width="320dp"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:text="Message..."
android:id="#+id/messageText"
android:textColor="#color/black"
android:textAppearance="?android:attr/textAppearanceMedium"
android:ellipsize="end"
android:maxLines="1"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/linearLayout" />
<TextView
android:layout_width="match_parent"
android:text="PushTime"
android:textAppearance="?android:attr/textAppearanceMedium"
android:gravity="right"
android:layout_weight="1"
android:textColor="#color/black"
android:layout_height="match_parent"
android:id="#+id/pushTimeText"
android:layout_alignTop="#+id/messageText" />
</RelativeLayout>
</com.daimajia.swipe.SwipeLayout>
EDIT: Screenshot added
EDIT2: Clarified parent fragment calling the adapter.
EDIT3: I did a temporary fix. Apparently the RelativeLayout and the Linear Layout in the AdapterXML were the cause of my misery. I'm not exactly sure why, though. I think it's the RelativeLayout and the LinearLayout somehow not displaying the text. Removing those two tags will display the texts in a linear fashion.

Try this
Adapter XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/bottom_wrapper"
android:layout_width="100dp"
android:layout_gravity="start"
android:layout_height="match_parent"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#ff0000">
<TextView
android:id="#+id/delete"
android:text="Delete"
android:textSize="18sp"
android:textColor="#color/black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
</RelativeLayout>
</LinearLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="10dp"
android:background="?android:attr/activatedBackgroundIndicator"
android:orientation="vertical"
android:layout_width="match_parent"
android:id="#+id/relativeViewInbox"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical|center_horizontal"
android:orientation="horizontal"
android:id="#+id/linearLayout">
<TextView
android:layout_width="match_parent"
android:text="SenderName"
android:textColor="#color/black"
android:textAppearance="?android:attr/textAppearanceMedium"
android:gravity="left"
android:layout_weight="1"
android:layout_height="match_parent"
android:id="#+id/senderNameText"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:text="PushDate"
android:gravity="right"
android:textColor="#color/black"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_weight="1"
android:layout_height="match_parent"
android:id="#+id/pushDateText" />
</LinearLayout>
<TextView
android:layout_width="320dp"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:text="Message..."
android:id="#+id/messageText"
android:textColor="#color/black"
android:textAppearance="?android:attr/textAppearanceMedium"
android:ellipsize="end"
android:maxLines="1"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/linearLayout" />
<TextView
android:layout_width="match_parent"
android:text="PushTime"
android:textAppearance="?android:attr/textAppearanceMedium"
android:gravity="right"
android:layout_weight="1"
android:textColor="#color/black"
android:layout_height="match_parent"
android:id="#+id/pushTimeText"
android:layout_alignTop="#+id/messageText" />
</RelativeLayout>

Custom ListView is not displayed

Following some tutorials, I managed to make a custom list.
But the whole screen is just a list
And now want to put the list below the form. And to make the whole screen make scroll along with the list (see the last item in the list, the form needs to rise)
The log (Toasty) says that the item was added, but nothing appears. I do not know if the problem is in how I add, or is the way I try to display
This is my layout:
<?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:background="#ffffff"
android:fillViewport="true"
android:padding="5dp" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/cliente" />
<EditText
android:id="#+id/venda_form_cliente"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:cursorVisible="false"
android:focusable="false"
android:hint="#string/selecione_um_cliente" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/produto" />
<EditText
android:id="#+id/venda_form_prod"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:cursorVisible="false"
android:focusable="false"
android:hint="#string/selecione_um_produto" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/quantidade" />
<EditText
android:id="#+id/venda_form_qtd"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:inputType="numberDecimal"
android:selectAllOnFocus="true"
android:text="#string/um" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/valor" />
<EditText
android:id="#+id/venda_form_valor"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:cursorVisible="false"
android:focusable="false"
android:inputType="none" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/desconto" />
<EditText
android:id="#+id/venda_form_desc"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:inputType="numberDecimal"
android:selectAllOnFocus="true"
android:text="#string/zero" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/subtotal" />
<EditText
android:id="#+id/venda_form_subtotal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:cursorVisible="false"
android:focusable="false"
android:inputType="none" />
</LinearLayout>
</LinearLayout>
<Button
android:id="#+id/venda_form_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:padding="10dp"
android:text="#string/adicionar" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:scrollbars="none" >
</ListView>
</LinearLayout>
</LinearLayout>
</LinearLayout>
And my activity
public class VendaFormActivity extends Activity {
private Cliente cliente;
// private Spinner condicaoSelect;
private Produto produto;
private TextWatcher somar;
private ItemVenda itemVenda;
private ListaAdapter listaAdapter;
private EditText inputQuantidade;
private EditText inputDesconto;
private EditText inputSubTotal;
private EditText inputProduto;
private EditText inputValor;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_venda_form);
inputProduto = ((EditText) findViewById(R.id.venda_form_prod));
inputValor = ((EditText) findViewById(R.id.venda_form_valor));
((EditText) findViewById(R.id.venda_form_cliente)).setOnClickListener(new ClickListener(this, ClienteActivity.class, MainActivity.REQUEST_CLIENTE));
inputProduto.setOnClickListener(new ClickListener(this, ProdutoActivity.class, MainActivity.REQUEST_PRODUTO));
//condicaoSelect = (Spinner) findViewById(R.id.venda_form_condicao);
//new CondicaoHelper(this).popular(condicaoSelect);
bindCamposValores();
fazerLista();
bindBtnAdd();
}
private void limparCamposValores() {
inputDesconto.setText("0.00");
inputQuantidade.setText("1");
inputSubTotal.getText().clear();
inputProduto.getText().clear();
}
private void bindBtnAdd() {
((Button) findViewById(R.id.venda_form_btn)).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
try{
Double quantidade = Double.parseDouble( inputQuantidade.getText().toString() );
Double desconto = Double.parseDouble( inputDesconto.getText().toString() );
itemVenda = new ItemVenda();
itemVenda.setDesconto(desconto);
itemVenda.setProduto(produto);
itemVenda.setQuantidade(quantidade);
listaAdapter.setNotifyOnChange(true);
listaAdapter.getItens().add(itemVenda);
listaAdapter.notifyDataSetChanged();
Toast.makeText(getApplication(), "Foi", Toast.LENGTH_SHORT).show();
limparCamposValores();
} catch (Exception e) {
Toast.makeText(getApplication(), "Invalido", Toast.LENGTH_SHORT).show();
// NPE no produto
// NumberFormat nos valores
}
}
});
}
private void fazerLista() {
listaAdapter = new ListaAdapter(getApplicationContext());
((ListView) findViewById(android.R.id.list)).setAdapter(listaAdapter);
}
static class ViewHolder {
protected TextView descricao;
protected TextView codigo;
protected TextView ean;
protected TextView referencia;
protected TextView quantidade;
protected TextView valor_unit;
protected TextView valor_item;
}
private class ListaAdapter extends ArrayAdapter<ItemVenda>{
private final Context context;
private final List<ItemVenda> itens;
public ListaAdapter(Context context) {
super(context, R.layout.produto_list);
this.context = context;
this.itens = new LinkedList<ItemVenda>();
}
public ListaAdapter(Context context, List<ItemVenda> itens) {
super(context, R.layout.produto_list, itens);
this.context = context;
this.itens = itens;
}
public List<ItemVenda> getItens() {
return itens;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
LayoutInflater inflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflator.inflate(R.layout.produto_list_item, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.descricao = (TextView) view.findViewById(R.id.descricao);
viewHolder.codigo = (TextView) view.findViewById(R.id.codigo);
viewHolder.ean = (TextView) view.findViewById(R.id.ean);
viewHolder.referencia = (TextView) view.findViewById(R.id.referencia);
viewHolder.quantidade = (TextView) view.findViewById(R.id.quantidade);
viewHolder.valor_unit = (TextView) view.findViewById(R.id.valor_unit);
viewHolder.valor_item = (TextView) view.findViewById(R.id.valor_item);
view.setTag(viewHolder);
} else {
view = convertView;
}
ViewHolder holder = (ViewHolder) view.getTag();
ItemVenda item = itens.get(position);
holder.descricao.setText(item.getProduto().getNome());
holder.codigo.setText(item.getProduto().getCodigo());
holder.ean.setText(item.getProduto().getEan());
holder.referencia.setText(item.getProduto().getReferencia());
holder.quantidade.setText(item.getQuantidade().toString());
holder.valor_unit.setText(item.getProduto().getPreco().toString());
holder.valor_item.setText(item.getSubTotal().toString());
return view;
}
}
private void bindCamposValores() {
inputQuantidade = ((EditText) findViewById(R.id.venda_form_qtd));
inputDesconto = ((EditText) findViewById(R.id.venda_form_desc));
inputSubTotal = ((EditText) findViewById(R.id.venda_form_subtotal));
somar = new TextWatcher() {
#Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
#Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
#Override
public void afterTextChanged(Editable arg0) {
Double sub = 0.0;
try{
itemVenda = new ItemVenda();
itemVenda.setQuantidade(Double.parseDouble(inputQuantidade.getText().toString()));
itemVenda.setDesconto(Double.parseDouble(inputDesconto.getText().toString()));
itemVenda.setProduto(produto);
sub = itemVenda.getSubTotal();
} catch (Exception e) {
// algum campo não é numero/está vazio
}
inputSubTotal.setText(""+sub);
}
};
// Se mudar o valor
inputQuantidade.addTextChangedListener(somar);
inputDesconto.addTextChangedListener(somar);
// quando sair do campo
inputQuantidade.setOnFocusChangeListener(new Focus("1"));
inputDesconto.setOnFocusChangeListener(new Focus("0.00"));
}
private class Focus implements OnFocusChangeListener {
private final String padrao;
public Focus(String padrao){
this.padrao = padrao;
}
#Override
public void onFocusChange(View v, boolean hasFocus) {
if(!hasFocus){
Editable text = ((EditText) v).getText();
if(null == text || "".equals(text.toString())){
text.append(padrao);
}
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_venda_form, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.menu_copiar:
copiar();
return true;
case R.id.menu_simulacao:
simulacao();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void copiar() {
Toast.makeText(getApplication(), "Nada ainda", Toast.LENGTH_SHORT).show();
}
private void simulacao() {
Intent intent = new Intent(getApplicationContext(), SimulacaoPagtoActivity.class);
startActivityForResult(intent, MainActivity.REQUEST_SIMULACAO);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == MainActivity.REQUEST_CLIENTE) {
if (resultCode == RESULT_OK) {
cliente = (Cliente) intent.getSerializableExtra(MainActivity.RESULT_MODEL_LIST);
((EditText) findViewById(R.id.venda_form_cliente)).setText(cliente.getNome());
}
} else if (requestCode == MainActivity.REQUEST_PRODUTO) {
if (resultCode == RESULT_OK) {
produto = (Produto) intent.getSerializableExtra(MainActivity.RESULT_MODEL_LIST);
inputProduto.setText(produto.getNome());
inputValor.setText(""+produto.getPreco());
somar.afterTextChanged(null);
}
} else if(requestCode == MainActivity.REQUEST_SIMULACAO){
// o que fazer quando voltar da simulação ?
}
}
}
Finally, my item layout
<?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:baselineAligned="false"
android:orientation="vertical"
android:padding="5dp" >
<TextView
android:id="#+id/descricao"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#333"
android:textSize="16sp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/codigo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="CODIGO" />
<TextView
android:id="#+id/ean"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="EAN" />
<TextView
android:id="#+id/referencia"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="REFERENCIA" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/quantidade"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="QUANT." />
<TextView
android:id="#+id/valor_unit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="VLR UNIT" />
<TextView
android:id="#+id/valor_item"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="VLR ITEM" />
</LinearLayout>
</LinearLayout>
UPDATE
When I add an item in the list, nothing is shown. But after I click a TextEdit, and the virtual keyboard up, after typing some value, I close the keyboard, then the adapter.getView () is called and the list appears

I think I found your problem. Shouldn't the following code:
((ListView) findViewById(android.R.id.list)).setAdapter(listaAdapter);
Be:
((ListView) findViewById(R.id.list)).setAdapter(listaAdapter);
instead?
You are trying to find a default Android view, rather than the view that you have created, which means that you are not actually setting the adapter for your ListView.

I am not sure about that, but if you want the list to be scrollable with the activity, you should use ScrollView, and then check if you scroll the list or the view itself. Try it
You can also try to see with debugger if the item was actually added to the list. I hope you will find an error.

Found the solution
1) The adapter have 2 constructors, but just 1 with List<ItemVenda> itens, and it isn't called.
I fixed it.
2) To add an item on the list, I need to call adapter.add() and not adapter.getItens().add()`. I think this trigger others methods.
3) Finally, to take the scroll list, and apply the scroll across the screen, I need to increase the size of the list. Then I override the method adapter.add(), and calculate the new height of the list, and add android:scrollbars="none" on ListView
Thanks to all, especially to #Marek