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I need to get data from http://schedule.sumdu.edu.ua/index/json?method=getTeachers, parse it and load into AutoCompleteTextview. Any suggestions?
You need to access the service URL using an AsyncTask<>, then later on get its response into a String object.
And, parse it, using JSONObject/Json Array present in android. You will get many examples for this.
Later on you can create a String array, load your data in it, and set it for auto complete for text view.
Here is an example for this.
String[] listTeachers; // initialize this with teachers JSON data
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.layout_teacher_list, listTeachers);
tvTeacher.setAdapter(adapter);
Related
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I have a few youtube API keys for my android project.
eg :
YOUTUBE_API_KEY1 = XXXXXXXXXXX
YOUTUBE_API_KEY2 = BBBBBBBBBBB
YOUTUBE_API_KEY3 = NNNNNNNNNNN
and I want that my String YOUTUBE_API_KEY = random key from the keys list.
how can I do it?
thanks
Use Random Class to get Random value
Java.util.Random
Get Random index value from list and use it.
index = new Random().nextInt(list.size())
item = list.get(index)
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I am creating a Classified application, I am stuck at Post Activity, where the user needs to select the Category to post their products. Below is the rough sketch for Post Activity.
Firebase Database Structure :
How to let the user select the Category from the Category list and based on that Category the item/products needs to be saved under that Structure.
For example : If the user needs to post an Advertisement for Audi, he will select "Cars" from the spinner list and that info(image,price,name) should be saved under "Cars" structure in the Firebase Database. Any help would be appreciated, I need to know the logic behind this:
You can get spinner text like this.
Spinner spinner = (Spinner)findViewById(R.id.spinner);
String text = spinner.getSelectedItem().toString();
After you got selected text you can set DatabaseReference location.
databaseReference = FirebaseDatabase.getInstance().getReference().child("All Categories").child(text);
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i want my app to search a specific website(from an url) for a specific text and give me the 3 chars after that text or to search for a pattern with a placeholder and give me the first matching string. Is that possible? There is no need to display the website.
Once you download the page using something like HTTPUrlConnection, you can use a regex with your search term
Pattern p = Pattern.compile("specific text(\w\w\w)");
Matcher m = p.matcher(site_text);
boolean b = m.matches();
The three \w will be captured in a group for you to use if there's a match.
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Should I use the comparable or comparator when I want to sort my list based on my own personal object?
should I use the collection operation in my recycler view adapter?
Is it a list of integers (as you specify in your title)?
you can use Arrays#sort
Arrays.sort(someArray, new Comparable<Integer>() {
public int compare(Integer a, Integer b) {
return a.compareTo(b);
}
});
If it's just a list of integers, and they are in for instance a List object, you don't have to use a comparator, unless you need to parse the integers as something other than plain numbers.
Collections.sort(myList);
If it's one of your own objects, look at Tyler Sebastians answer. Collections comes with a similar method for lists.
Collections.sort(myList, new MyComparator());
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I want to generate Search Suggestions that matches the input in the AutoCompleteTextView.
It will check for the matches for the first word I type then all the related words should be populated.
After I type next character then it will match combination of that word and populate the result .
I do not understand how to do pattern matches.
For example: Suppose, there are three country names.
INDIA, IRAQ, IRAN.
When I type I then I want get All Country names Starting with I to be displayed.
When I type IR then result should be IRAN,IRAQ. ETC.
Your requirement will be satisfied in AutoCompleteTextView itself.
Threshold is used to set from the length where auto complete show it's suggestion:
For ex:
String[] languages={"INDIA", "IRAQ","IRAN"};
AutoCompleteTextView text(AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,languages);
text.setAdapter(adapter);
text.setThreshold(1);