My app has a twoline ListView with a custom adapter. I want to filter the listview contents with the input to a EditText. How is it possible?
lv.setAdapter(new MyCustomBaseAdapter(getActivity(),recordObjects));
//recordObjects is an ArrayList of objects
you have to set TextWatcher to your EditText and
and then filter your data using dynamic array...
Use the addTextChangedListener method to add a TextWatcher to your EditText. Then in your implementation of onTextChanged, add or remove the items from your ListView's adapter as appropriate.
Is this the kind of thing you wanted?
ListView lv = getListView();
/* Gets a ListView */
lv.setTextFilterEnabled(true);
/* sorts the listview */
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
getApplicationContext(),
android.R.layout.simple_list_item_1,
result.getheadlines());
setListAdapter(adapter);
/*
* gets the lisadapter from the XML and sets it equal to
* whatever result is
*/
Related
ListView list = (ListView) findViewById(R.id.listView1);
ArrayAdapter<String> dataAdaptor = new ArrayAdapter<String> (this, android.R.layout.simple_list_item_1, android.R.id.text1, cars);
list.setAdapter(dataAdaptor);
I write that codes for listview but I don't know how I get data for subitem. How can I do this?
A ListView item can have it's own custom layout. When you create your adapter for the ListView you can pass in the layout id to the Adapter constructor.
If you want to show some more details like image and text or two textview then You will have to extend an Adapter and implement getView() to property set the image+text.
please check this answer with examples.
In my ListView i want single selection to delete the item. For that i am using simple_list_item_single_choice with ArrayAdapter. It show me the single choice option in my ListView. But i am not able to click on that checkbox.
Here is my code:
ArrayList array_list_title = mydb.getTitle();
System.out.println(array_list_title);
ArrayAdapter<String> arrayAdapter =
new ArrayAdapter<String>(this,android.R.layout.simple_list_item_single_choice, array_list_title);
listView.setAdapter(arrayAdapter);
You need to use ListView.setChoiceMode(int mode). Like
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); // Enables multiple selection
or
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); // Enables single selection
to enable checkboxes.
So your code will be like
ArrayAdapter<String> arrayAdapter =
new ArrayAdapter<String>(this,android.R.layout.simple_list_item_single_choice, array_list_title);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setAdapter(arrayAdapter);
I am trying to use the following code to populate a ListView using a predefined array of strings:
String[] schedule_names = getResources().getStringArray(R.array.test_schedules);
// Populate the ListView using the array of schedule names
ArrayList<String> als = new ArrayList<String>(Arrays.asList(schedule_names));
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listView, als);
adapter.add("Test");
ListView listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
But it force closes unless I comment out listView.setAdapter(adapter); (which obviously means the ListView isn't populated at all). It seems the reason is a NullPointerException.
Why is this?
This line is wrong...
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listView, als);
...the second parameter of the constructor should not be your ListView, it should be a layout with a TextView.
Try replacing R.id.listView with android.R.layout.simple_list_item_1
I'm trying to bind data do a listview on android, but I'm not able to.
I saw some code on the internet and it worked, but I just don't know why, and I don't want to create a new ListView on the fly, I want to use the one that is listed on the main.xml
Why I can do this:
ListView lv = new ListView(this);
lv.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,PEOPLE));
setContentView(lv);
But I can't do this:
ListView listPessoas = (ListView) findViewById(R.id.listPessoas);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listPessoas, PESSOAS);
listPessoas.setAdapter(adapter);
What is R.id.pessoas??
This works fine for me:
String[] x = new String[]{"AAA","BBB","CCC"};
ListView lv = (ListView) findViewById(R.id.listView1);
ArrayAdapter<String> test = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,x);
lv.setAdapter(test);
Your error here is when you are creating the new ArrayAdapter. You are passing R.id.listPessoas as the row view to use for each row. This is the id of the ListView. The adapter is looking for a layout id containing a text view to be used for each row of the list. Change the R.id.listPessoas to android.R.layout.simple_list_item_1 and your code should work. The simple_list_item_1 layout is just a TextView that the data will be bound to.
What you have written is not correct, the second parameter in the array adapter constructor should be the simple layout for each list item not again your list view.
If your have a custom complex layout for your list item you need to write a custom adapter as well.
If you are getting error.
getApplicationContext(); will work instead of 'this'.
I create listView by use the following code.If i use lv.setTextFilterEnabled(true);
i get the list View filter.If i set the filter text its not display the filtered listView.How to set the filter text;
lv=new ListView(this);
lv.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_checked, items));
//lv.setTextFilterEnabled(true);
lv.setFilterText("a");
Note :
I have the TextViews A to Z . When i touch letter 'a' i wish to list the elements starts with 'a' so that i need to set the list filter at run time.
Try this code:
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_checked, items);
lv.setListAdapter(adapter);
lv.setTextFilterEnabled(true);
adapter.getFilter().filter("a");