Develop Reference

When Click and item on Recyclerview , shows a Dialog and get user input and update that value in recycler item

This is the onBinderViewHolder on the Adapter I used to connect data to Recyclerview
public void onBindViewHolder(Adapter_PO_Brands.BrandViewHolder holder, int position) {
DrugData DD = mDrugData.get(position);
holder.txtBrand.setText(DD.getBrand());
holder.txtGeneric.setText(DD.getGeneric());
holder.btnAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ShowAddPOQty(holder.txtQty,DD);
});
}
This is the ShowAddPOQty Method use to generate the dialog
public void ShowAddPOQty (TextView Qty ,DrugData dd) {
dialog = new Dialog(mContext);
dialog.setContentView(R.layout.dialog_po_qty);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
TextView txtQty=dialog.findViewById(R.id.txtQty);
TextView Increase=dialog.findViewById(R.id.increase);
TextView Decrease=dialog.findViewById(R.id.decrease);
MaterialButton btAdd=dialog.findViewById(R.id.btn_Add);
MaterialButton btCancel=dialog.findViewById(R.id.btn_Cancel);
btAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Qty.setText("Qty : "+txtQty.getText().toString());
dialog.cancel();
});
dialog.show();
}
The Thing I wanted to do is , When I click an item on Recyclerview , I want to show a dialog . The user set a quantity and click on Add button on dialog. Then I need to update that value on the recyclerview item that user clicked. The above code update the value in various items in the recyclerview. Not only in the item the user clicked.
Deperately needed your help thanks.

If you are using this method in adapter then do:
take which object of list you want to change in method and after changing that object instance notify the recycler adapter
public void ShowAddPOQty (TextView Qty ,DrugData dd) {
dialog = new Dialog(mContext);
dialog.setContentView(R.layout.dialog_po_qty);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
TextView txtQty=dialog.findViewById(R.id.txtQty);
TextView Increase=dialog.findViewById(R.id.increase);
TextView Decrease=dialog.findViewById(R.id.decrease);
MaterialButton btAdd=dialog.findViewById(R.id.btn_Add);
MaterialButton btCancel=dialog.findViewById(R.id.btn_Cancel);
btAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Qty.setText("Qty : "+txtQty.getText().toString());
// here change your object values
dd.setValue(value);
notifyDataSetChanged();
dialog.cancel();
});
dialog.show();
}

Long-press on item message to change layout

Long press
When I long-click on an item of the message, the item will display and the layout changes like the picture. I want to make this , but i don't have a keyword to find this solution. I need a keyword or some example to make it.

Many ways you can do. I am going to share one example.
Implement View.OnLongClickListener as follows
private void setupLongPress() {
imageButton.setOnLongClickListener(new View.OnLongClickListener(){
#Override
public boolean onLongClick(View v){
// here your staff
// we added dialog method here as follows
createPreviewDialog();
return false;
}
});
}
Now use LayoutInflater to inflate new layout as a popup windows
private Dialog createPreviewDialog() {
View view = LayoutInflater.from(getContext()).inflate(R.layout.dialog_preview, null);
LinearLayout closeButton = view.findViewById(R.id.close);
closeButton.setOnClickListener (new View.OnClickListener (){
#Override
public void onClick ( View view ) {
dismiss();
}
});
View okButton = view.findViewById(R.id.ok);
loginButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dismiss();
// here your staff
}
});
builder.setView(view);
return builder.create();
}

update a value in TextView when clicking on listview items

I have a listview with items. I have developed onitemclick() function with a custom dialog to enter a value. I need to update the listview current item with value we enter in the dialog box.
i have done like this
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
showCustomDialog(view);
if(quantity>0){
TextView tv=(TextView)view.findViewById(R.id.row_item_quantity);
tv.setTextColor(R.color.white);
tv.setText(quantity+"");
quantity=0;
Toast.makeText(getActivity(), "entered "+quantity , Toast.LENGTH_SHORT).show();
}
}
showCustomDialog function is
protected void showCustomDialog(View view) {
// TODO Auto-generated method stub
final Dialog dialog;
dialog = new Dialog(getActivity());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.alert_enter_quantity);
dialog.setCancelable(true);
final EditText editText;
editText = (EditText)dialog.findViewById(R.id.quantity_number);
Button buttonCancel;
buttonCancel = (Button)dialog.findViewById(R.id.quantity_cancel_button);
buttonCancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
Button buttonOK;
buttonOK = (Button)dialog.findViewById(R.id.quantity_ok_button);
buttonOK.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Toast.makeText(getActivity(), "entered"+editText.getText().toString() , Toast.LENGTH_SHORT).show();
String text=editText.getText().toString();
if(text=="")
text=""+0;
quantity =Integer.parseInt(text);
//setQuantity(qty);
dialog.dismiss();
}
});
dialog.show();
}
It gets the value and will update on the next item i clicks. How can i correct this problem.

use
tv.setText(String.valueOf(quantity);
instead of
tv.setText(quantity+"");

if you are using array for list data you have to update the list in exact position.then call adapter.notifiDataChanged().If u want to change it temporally use view.invalidate();

I have done it.
As below.
write a custom dialog box with an edittext and two buttons for OK and Cancel.
buttonOK = (Button)dialog.findViewById(R.id.quantity_ok_button);
buttonOK.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String text;
text=editText.getText().toString();
quantity=text;
//Toast.makeText(getActivity(), "entered"+editText.getText().toString() , Toast.LENGTH_SHORT).show();
setQuantity(quantity,position);
dialog.dismiss();
}
});
void setQuantity(String quantity,int position){
if(!selectedItemsMenu.contains(data))
// lines ///
selectedItemsMenu.add(data);
listMenu.add(position, data);
Log.e("new list size", selectedItemsMenu.size() + "");
adapter.notifyDataSetChanged();

How to have data from dialog box to listview in android 2.1?

all
i have created listview dynamically.now i want to change the name of listview/listitems or i want to retrieve content below each row but the content is coming from dialogbox.is it possible to have data from dialogbox in listview?How to achieve this??can any one guide or give some sample code of the same?
Thanks in Advance--
public class Tdate extends Activity
{
private ListView lView;
private String lv_items[] = { "Birth_Date", "Anniversary_Date", "Joining_Date","Meeting_Date","Appraisal_Date","Anniversary_Date", "Joining_Date","Meeting_Date","Appraisal_Date"};
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.tdate);
Button customdate = (Button)findViewById(R.id.customdate);
lView = (ListView) findViewById(R.id.ListView01);
lView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_multiple_choice, lv_items));
lView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lView.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3)
{
showDateTimeDialog();
}
});
}
private void showDateTimeDialog()
{
// Create the dialog
final Dialog mDateTimeDialog = new Dialog(this);
// Inflate the root layout
final RelativeLayout mDateTimeDialogView = (RelativeLayout) getLayoutInflater().inflate(R.layout.date_time_dialog, null);
// Grab widget instance
final DateTimePicker mDateTimePicker = (DateTimePicker) mDateTimeDialogView.findViewById(R.id.DateTimePicker);
// Check is system is set to use 24h time (this doesn't seem to work as expected though)
final String timeS = android.provider.Settings.System.getString(getContentResolver(), android.provider.Settings.System.TIME_12_24);
final boolean is24h = !(timeS == null || timeS.equals("12"));
// Update demo TextViews when the "OK" button is clicked
((Button) mDateTimeDialogView.findViewById(R.id.SetDateTime)).setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mDateTimePicker.clearFocus();
((TextView) findViewById(R.id.Date)).setText(mDateTimePicker.get(Calendar.YEAR) + "/" + (mDateTimePicker.get(Calendar.MONTH)+1) + "/"
+ mDateTimePicker.get(Calendar.DAY_OF_MONTH));
if (mDateTimePicker.is24HourView()) {
((TextView) findViewById(R.id.Time)).setText(mDateTimePicker.get(Calendar.HOUR_OF_DAY) + ":" + mDateTimePicker.get(Calendar.MINUTE));
} else {
((TextView) findViewById(R.id.Time)).setText(mDateTimePicker.get(Calendar.HOUR) + ":" + mDateTimePicker.get(Calendar.MINUTE) + " "
+ (mDateTimePicker.get(Calendar.AM_PM) == Calendar.AM ? "AM" : "PM"));
}
mDateTimeDialog.dismiss();
}
});
// Cancel the dialog when the "Cancel" button is clicked
((Button) mDateTimeDialogView.findViewById(R.id.CancelDialog)).setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
mDateTimeDialog.cancel();
}
});
// Reset Date and Time pickers when the "Reset" button is clicked
((Button) mDateTimeDialogView.findViewById(R.id.ResetDateTime)).setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
mDateTimePicker.reset();
}
});
// Setup TimePicker
mDateTimePicker.setIs24HourView(is24h);
// No title on the dialog window
mDateTimeDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
// Set the dialog content view
mDateTimeDialog.setContentView(mDateTimeDialogView);
// Display the dialog
mDateTimeDialog.show();
}
}

Deleting last item from spinner deletes the entire list

I am trying to use a spinner control that will enable the user to delete any list element.
I have an 'add' button to add elements to the list, and a 'delete' button that removes the currently-displayed item from the list.
It works as expected except when the user deletes the last item in the list. At that point, all of the list's items are deleted.
My code is as follows:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// grab our UI elements so we can manipulate them (for the Spinner)
// or add listeners to them (in the case of the buttons)
m_myDynamicSpinner = (Spinner)findViewById(R.id.dynamicSpinner);
m_addItemText = (EditText)findViewById(R.id.newSpinnerItemText);
Button addButton = (Button)findViewById(R.id.AddBtn);
Button clearButton = (Button)findViewById(R.id.ClearBtn);
// create an arrayAdapter an assign it to the spinner
m_adapterForSpinner = new ArrayAdapter(this, android.R.layout.simple_spinner_item);
((ArrayAdapter)m_adapterForSpinner).setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m_myDynamicSpinner.setAdapter(m_adapterForSpinner);
// add listener for addButton
addButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
addNewSpinnerItem();
}
});
clearButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
clearSpinnerItems();
}
});
}
// add listener for addButton
private void addNewSpinnerItem() {
if (m_addItemText.getText().length() == 0) {
Toast.makeText(getApplicationContext(), "The textView is empty", Toast.LENGTH_LONG).show();
} else {
CharSequence textHolder = "" + m_addItemText.getText();
((ArrayAdapter) m_adapterForSpinner).add(textHolder);
}
m_addItemText.setText("");
}
private void clearSpinnerItems() {
m_myDynamicSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
Object t = m_adapterForSpinner.getItem(pos);
((ArrayAdapter) m_adapterForSpinner).remove((CharSequence) t);
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO
}
});
}
Does anyone have any ideas or suggestions on how to make this work?

The problem with your code is that the deletion is inside the onItemSelected callback, which gets called every time you are deleting an entry, thus deleting recursively until you effectively do not have any more entries to select. If you add a log inside that method:
Log.d("Spinner", "Count: " + m_adapterForSpinner.getCount());
you will see what I mean. I'm sure you can come up with more elegant code, but a quick and dirty hack is to set up a boolean flag to stop the recursion after the first deletion. See the snippet below and add the commented lines to your own code:
public class SpinnerTest extends Activity {
Spinner m_myDynamicSpinner;
EditText m_addItemText;
ArrayAdapter m_adapterForSpinner;
public static boolean cleared = false; // <--- set up a static boolean here
#Override
public void onCreate(Bundle savedInstanceState) {
// all your code unchanged
clearButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
cleared=false; // <--- nope, we did not clear the value yet
clearSpinnerItems();
}
});
}
// code unchanged
private void clearSpinnerItems() {
m_myDynamicSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
Object t = m_adapterForSpinner.getItem(pos);
Log.d("Spinner", "Count: " + m_adapterForSpinner.getCount());
if (!cleared) // <--- did I do it already?
((ArrayAdapter) m_adapterForSpinner).remove((CharSequence) t);
Log.d("Spinner", "Count: " + m_adapterForSpinner.getCount());
cleared=true; // I did it!
}
// code unchanged

i cann't understand your question.any way you can get the position of the selected item by using getSelectedItemPosition() method.