Dropdown in AutoCompleteTextView in Android - android

My AutoCompleteTextView is working fine. I am using the AutoCompleteTextView to add data to the database. However, I fail to see the recently added data getting displayed in the dropdown list of the AutoCompleteTextView. Every time I need to restart the activity to display the data that was recently added to the database. Are there ways to display the very recently added data without restarting the activity?
Update:
String[] autoCompleteSupplierName = vivzHelper.getSupplierName();
ArrayAdapter<String> supplierNameAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, autoCompleteSupplierName);
supplierName.setThreshold(1);// starts working from first char
supplierName.setAdapter(supplierNameAdapter);

Related

Optimization of AutoCompleteTextView initialization

I'm a newcomer to Android world.
I'm facing an performance problem in my app under development.
I've one activity with one AutoCompleteTextView. I'm initializing it on onCreate() of activity with an adapter like below:
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line, keywords);
final AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);
textView.setAdapter(adapter);
The "keywords" is an String[] which I'm reading from json file containing a almost 3000 entries every time on onCreate(). At the same time, I get values against "keyword" and adding to a HashMap
Because of this, loading time of this activity is slowing down.
By what means I can reduce:
Reading json file only one time
Initialize adapter one time
So next time onward I can load the activity faster [First time I can show some "loading..." dialog]
You can try the following
Parse json in a background thread and put a loading bar.
Once strings are parsed and displayed, you save them via in an instance(onSavedInstanceState). As long as activity is not destroyed displaying them will be faster.
Save strings in sharedpreferences or SQlite DB(this option depends on app, like what strings are you displaying).

creating autocomplete in android

I want to create a AutoCompleteTextView in android. The problem is that I want to show whole list of data when user selects AutoCompleteTextView and start filtering data as user types the letters.Please help me in doing this.
Well here is an way how you can do that,
declare an String array -
String[] array = new String[]{"first","second","third","fourth"};
Now, initialize the Adapter with the source.
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line,array);
Finally fetch the AutoCompleteTextView id from your xml and set the adapter.
AutoCompleteTextView mView = (AutoCompleteTextView)
findViewById(R.id.myAutoTextView);
mView.setAdapter(adapter);

Android Edittext listviews?

I have been scouring the Internet for a way to use an input box at the top of the page, and have an add & remove button.
I want the EditText to write to the ListView, which in turn writes the list to a .txt-file.
I have tried breaking this down into multiple small sections of just simple things like
getting the input from the EditText to post to a TextView.
Organizing a ListView
writing to a file and
reading from a file.
If you have any advice about how to get the ListView to go from the EditText greatly helpful.
The best way to do this is to have an ArrayList<String> to store your Strings from the TextView, and in turn have that ArrayList<String> feed into the ListView. For example, for your Add button handler:
// Declare our variables
ArrayList<String> myStringList = new ArrayList<String>();
// OnClickListener stuff for Add button
..
myStringList.add(myEditText.getText().toString());
myListView.setListAdapter(new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_list_item_1, myStringList));
..
// Close OnClickListener stuff
Make sure you refresh your list adapter afterwards to show the new values. Likewise if you're deleting, use myStringList.remove(index) to remove that string from the list and refresh the array adapter. As for writing to a text file, have a look at this thread.

Android -- AutocompleteTextView dropdown question

So here's my issue.
String[] list = ws.getList() ///returns a String[] of 2900 elements.
AutoCompleteTextView actv= (AutoCompleteTextView)findViewById(R.id.field);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.dropdownmenu, list);
actv.setAdapter(adapter);
My question is... when I run my application, my autocompletetextview does not generate any sort of text whenever I type in it. However, if I shorten my list to like, 30 elements, it works perfectly. Are autocompletetextviews limited to a certain amount of items?
Thanks!
I have an autocompletetextview in an app i'm developping that has about 5000 entries and it works fine.
However, it is significantly slow on a real device without debugging set to true. So if you run it in the emulator it is very likely that you are not seeing anything as it would take a long long type to perform filtering and then display the suggestions.
To my knowledge, there is no limit on the numbers of item
I'm having the same issue. I've been running a lot of tests to try slim down the problem.
I'm using an xml file to supply the array to my autocomplete field.
In 2.2 the activity crashes when the array is too large.
In 2.3 the same array doesn't cause any issues at all.
My array consists of around 950 nodes.
Once I slim it doen to about 200 it's fine. (I didn't note the exact number that causes a crash.)
I had a similar issue but some of my Strings were null or empty, because the data was pulled from an unfamiliar database. I created my list like this and it works just fine. The empty or null strings in the list prevent the dropdown from opening.
if(mystring!=null && !mystring.isEmpty())
{
//add to list here
}
Maybe your test of 30 is working because you know each string has a value. I did a similar test and found that it worked, which led me to the solution/idea above... two years later... I wonder if he's still stuck on this problem ;)

how to display a list in android

I have a String countries[].
now when i click a button then on the onClick event this abc array is filled.suppose it is filled with the name of 10 countries.These 10 countries should be visible as a list so that i can choose any 1 country among the list. but i am not able to show them as a list.
My programme crashes if i use the following code :
ListView list = (ListView)findViewById(R.id.ListView);
list.setAdapter(new ArrayAdapter(this,
android.R.layout.simple_list_item_1, countries));
As countries is filled later on the click of a button.So initially the countries array is empty and as the onCreate() is executed first it crashes.
I found the examples on net where there is pre-defined array.so it works.My array is filled in a onClick event.how can i display List at that moment???
Make list your member variable.
Move the setAdapter call inside your onClick()....That'll do.

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