I have a Listview with a CheckBox and some Textviews and i'm trying to get all the checked items. I'm using a SimpleAdapter and could not find any helpful tutorial for it. Is there any way to do it with a SimpleAdapter?
You can display checked items of listview like this :
When a listview item is checked,it appends the item to the Textview and removes when the item is unchecked.
ArrayList<String> selectedNames = new ArrayList<String>();
//Initialise selctnts in onCreate().
selctnts=(TextView)findViewById(R.id.selectedtagcontact);
public class CheckBoxClick implements AdapterView.OnItemClickListener {
int listlength;
#Override
public void onItemClick(AdapterView<?> arg0, View view, int position, long id) {
CheckedTextView ctv = (CheckedTextView) view;
String item = adapter.getItem(position);
if (ctv.isChecked()) {
ctv.setChecked(true);
selectedNames.add(ctv.getText().toString());
selctnts.append(item+", ");
} else {
ctv.setChecked(false);
selectedNames.remove(ctv.getText().toString());
listlength=selectedNames.size();
selctnts.setText("");
for(int l=0;l<listlength;l++)
selctnts.append(selectedNames.get(l)+", ");
}
}
}
Related
I have a ListView that I populate using the FirebaseListAdapter. Now I want the OnItemClickListener to show the value of the item clicked (the text displayed on the item) in a Toast.
ListView listView;
ListAdapter listAdapter;
mFirebaseRef = new Firebase("https://<firebase root ref>/posts");
mFirebaseQuery = mFirebaseRef.orderByChild("author_id").equalTo(id); //`id` is a variable defined earlier
listAdapter = new FirebaseListAdapter<Post>(this, Post.class, android.R.layout.simple_list_item_, mFirebaseQuery) {
#Override
protected void populateView(View view, Post post) {
String postTopic = post.getTopic();
((TextView) view.findViewById(android.R.id.text1)).setText(postTopic);
}
};
listView = (ListView) findViewById(R.id.postsList);
listView.setAdapter(listAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String topic = String.valueOf(parent.getItemAtPosition(position));
Toast.makeText(getApplicationContext(), "List Item Value: "+topic, Toast.LENGTH_LONG).show();
}
});
Instead of returning the text displayed on the item (as is in the case an ArrayAdapter is used), String.valueOf returns some reference to the model class I use - Post.class.
The output is something like this: com.example.android.model.Post#a1e1874
Can anybody tell me how to get the value of the list item in this case?
AdapterView.getItemAtPosition() returns a Post object, so:
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Post post = (Post)parent.getItemAtPosition(position);
String topic = post.getTopic();
Toast.makeText(getApplicationContext(), "List Item Value: "+topic, Toast.LENGTH_LONG).show();
}
I have a listView with 2 items in the list, the first item in position 0 responds to clicks but the other does not! i have tried to copy the same onclick method and changed the if statement to the list item in position 1 but it is not working out for me so i am looking how to get this working if someone could help me? i have included the only code i think is needed to resolve this,
public class TopLevelActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_top_level);
//Create an OnItemClickListener
AdapterView.OnItemClickListener itemClickListener =
new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> listView,
View v,
int position,
long id) {
if (position == 0) {
Intent intent = new Intent(TopLevelActivity.this,
DrinkCategoryActivity.class);
startActivity(intent);
}
}
};
//Add the listener to the list view
ListView listView = (ListView) findViewById(R.id.list_options);
listView.setOnItemClickListener(itemClickListener);
//what ive tried to open the foodCategoryActivity list item
AdapterView.OnItemClickListener itemClickListener =
new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> listView,
View v,
int position,
long id) {
if (position == 1) {
Intent intent = new Intent(TopLevelActivity.this,
FoodCategoryActivity.class);
startActivity(intent);
}
}
};
//Add the listener to the list view
ListView listView = (ListView) findViewById(R.id.list_options);
listView.setOnItemClickListener(itemClickListener);
}
}
thank you.
Currently using two different click listeners for same ListView to do different on different items click in ListView with is not valid way to do task according to click position in ListView.
Use single click listener and inside onItemClick method use switch-case or if-else ladder for doing task like:
AdapterView.OnItemClickListener itemClickListener =
new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> listView,
View v,
int position,
long id) {
if (position == 0) {
}
else if (position == 1) {{
}
}
};
and also remove following line which you are using two times:
ListView listView = (ListView) findViewById(R.id.list_options);
listView.setOnItemClickListener(itemClickListener);
because no need to create listView and call setOnItemClickListener multiple times just do it once.
You can only set one OnItemClickListener
you need to differentiate in the implemented method via either the position or the View object itself:
AdapterView.OnItemClickListener itemClickListener =
new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> listView,
View v,
int position,
long id) {
if (position == 0) {
//code for drink category
}
else {
//code for food category
}
}
};
//Add the listener to the list view
ListView listView = (ListView) findViewById(R.id.list_options);
listView.setOnItemClickListener(itemClickListener);
I am using below code to setcolor of a selected item of a listview. The rule is only one should be colored. But with below code if I select 2 views both get colored. Can you please help me get all other views in the listview so that when I click on certain view all other views i set to different color and the selected view i set a different color(Green in this case).
Please let me know if any other solution?
lv = (ListView) view.findViewById(R.id.listf);
lv.setAdapter(text![enter image description here][1]Adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView v = (TextView) view.findViewById(R.id.template_text);
view.setBackgroundColor(Color.GREEN);
}
});
I resolved the problem using the below:
I put a loop where only the selected list item is set in RED whereas all others were set in Green, in this way only only one list item will be colored on selected.
lv = (ListView) view.findViewById(R.id.listf);
lv.setAdapter(Adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
for (int i = 0; i < 3; i++)
{
if (position == i)
{
parent.getChildAt(i).setBackgroundColor(Color.RED);
}
else
{
parent.getChildAt(i).setBackgroundColor(getResources().getColor(R.color.Dark_Green);
}
}
TextView v = (TextView) view.findViewById(R.id.template_text);
view.setBackgroundColor(Color.GREEN);
}
});
As you told you are not able to change adapter code, you can prefer solution 2.
Solution 1: Create one variable int selectedPosition and method setSelected in your adapter class
int selectedPosition = -1;
public void setSelected(int position)
{
selectedPosition = position;
notifyDatasetChanged();
}
Edit getView() of the adapter class and include following code
if(selectedPosition==position)
{
templateTextView.setBackgroundColor(Color.GREEN);
}
else templateTextView.setBackgroundColor(Color.BLUE);// default textView color
Solution 2: keep reference of previously selected textView as well each time change the color of currently selected textview to green andd previous one to blue
TextView previousSelected = null;
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(previousSelected!=null)
previousSelected.setBackgroundColor(Color.BLUE);
TextView v = (TextView) view.findViewById(R.id.template_text);
view.setBackgroundColor(Color.GREEN);
previousSelected = v;
}
});
Hi I am working with android.I had created a listview using array list. Now how can I add Action to each list item and also how to get the list position of that item. Please help me, thanks
here is my code
public class MainActivity extends Activity {
private ListView lv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView lv=(ListView)findViewById(R.id.listView1);
ArrayList<String> list=new ArrayList<String>();
list.add("aaaa");
list.add("bbbb");
list.add("cccc");
list.add("dddd");
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_list_item_1,
list);
lv.setAdapter(arrayAdapter);
}
}
You need to implement ListView setOnItemClickListener
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// ListView Clicked item index
int itemPosition = position;
// ListView Clicked item value
String itemValue = (String) listView.getItemAtPosition(position);
// Show Alert
Toast.makeText(getApplicationContext(),
"Position :"+itemPosition+" ListItem : " +itemValue , Toast.LENGTH_LONG)
.show();
}
});
For more information go to Documentation.
you can also get the selected item of ListView in setOnItemClickListener using following code:
listView1.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
int itemPosition = position;
String itemname = ((TextView)view).getText().toString();
Toast.makeText(getBaseContext(), "Item: " + itemname + " is at position: " + itemPosition, Toast.LENGTH_LONG).show();
}
});
As the listview cells position and the index of arraylist are same. So we can easily get the item from arraylist by the position of cell of listview.
listView1.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id)
{
int position=position;
String item=marraylist.get(position).toString();
}
}
I used list view to list the items of my SQLite database as follows:
listView = (ListView) findViewById(R.id.listView1);
db.open();
Cursor c = db.getAllHistory();
ArrayList<String> temparr = new ArrayList<String>();
if (c.moveToFirst()) {
do {
temparr.add(c.getString(0)+'\t'+c.getString(1)+'\t'+c.getString(2)+'\t'+c.getString(3)+'\t'+c.getString(4)+'\t');
} while(c.moveToNext());
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, temparr);
listView.setAdapter(adapter);
} else {
db.close();
}
Now I want to access the specific list item by using OnItemClickListener. How should i do it?
To get your perticular data-
Implement setOnItemClickListener()-
and position will return list's item position number:-
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
String yourData = temparr.get(position);
}
});
Just call listView.setOnItemClickListener() with your implementation of the listener.
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
// your code
// Toast.makeText(context,temparr.get(position),Toast.LENGTH_SHORT).show();
}
});
parent -> The AdapterView where the click happened.
view -> The view within the AdapterView that was clicked (this will be a view provided by the adapter)
position -> The position of the view in the adapter.
id->The row id of the item that was clicked.
You can set the listener like this:
Put this code in onCreate()
TextView disp = (TextView) findViewById(R.id.textView1);
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String temp = (String) listView.getItemAtPosition(position);
disp.setText(temp);// display on screen
}
});
EDIT:
As you want to display the listItem on screen in a permenant sort of way rather than displaying a toast, the easiest way that you can do this is by adding a TextView in your layout. See the updated code
Hope this helps.