I am using a custom list view by extending the ArrayAdapter class. Each row has some text as well as an image. What I want to do is delete the row when I click on the imagevView. So i set an onclick listener as well as a tag for each image view and then used the onclick listener to change the adapter. However it simply refuses to work. What exactly am I doing wrong?
holder.image.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view)
{
Toast.makeText(context, "ImageView clicked for the row = "+view.getTag().toString(), Toast.LENGTH_SHORT).show();
createEvent.list.remove(view.getTag());
createEvent.adapter.notifyDataSetChanged();
}
The toast prints correctly. However the item is not deleted. Any ideas on how I can achieve this?
Related
I am using listviews instead of button in my application. I want to set OnClickListener() on listview instead of setOnItemClickListener().
here is my code:
listview.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(getApplicationContext(), BillingActivity1.class));
}
});
can someone suggest a method to do OnClickListener()?
thank you
Ok, I understood your problem.
Lets analyze cases:
Listview with items
If your ListView has some items, the good approach is to set anyway an onItemClickListener and, based on which item has been clicked, do something. You can also do the same thing for each item without considering which item has been pressed, but this is still the best approach.
ListView with no items
From Docs:
the list view will be hidden when there is no data to display.
ListView (usually) has the height set to wrap_content, so even setting the onClickListener on an empty list won't work since the list will result having height of 0, being not able to be clicked (you can't click a view with no height since it is not visible).
Perform actions on an empty ListView
If, as it looks like, you need to do some stuffs on your ListView even if it's empty, just add a Button or a FloatingActionButton to your Activity and then use those: you can both keep the button in any case (like an "Add item" Button) or you can make it visible only if the ListView is empty. something like:
xml
<Button
android:id="#+id/buttonEmptyListStuffs"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="List is empty, click me!"
android:visibility="gone"/>
activity
//init the button and do other stuffs
...
buttonEmptyListStuffs.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//go to activity 2
}
});
...
List<MyListViewItem> myListViewItems = //init your list of items for the listView
buttonEmptyListStuffs.setVisibility(myListViewItems.size() > 0 ? View.GONE : View.VISIBLE);
...
Note: I wrote this code by hand without compiler so it might not be perfect, just take the concept behind it
As Pskink said from comments
I forgot to mention that ListView has setEmptyView(View) which allows you to set a custom layout for the Listview if it is empty. Refer to his link for a good tutorial
USe this:
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
startActivity(new Intent(getApplicationContext(), BillingActivity1.class));
}
});
If you really want to handle click on any Point of your listView. You can put the list inside a FrameLayout or LinearLayout and then add your onClickListener on the layout.
findViewById(R.id.my_parent_list_layout).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// DO your stuff
}
});
If your list item count is empty the dynamaically change the visibility of the list view with a button(switching the visibility with list view and button) and give the click action to the button.
item of my recycler view has some different views which has to have a click listener if i add a click listener to recycler view with view and position parameters it always take the layout behind the views on click. Therefore, i am setting my click listeners in onBindViewHolder like this:
holder.myTextView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// stuff
}
});
holder.myImageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// stuff
}
});
I wonder whether it is a correct method?
Where should a click listener be in a recycler view?
There are many ways for achieve this, but ;
Both is correct as i see on your codes.Means, if you set those items with myTextView, the users will be able to click on TextView (f.g) for showing that RecyclerView item content or whatever and other stuffs like ImageView won't work for listener.
And this is correct for myImageView too, if you set those items with it for listener, the users will be able to click only in this myImageView.
By the way, i think it is better to use implements View.OnClickListener for whole of the Holder.
Something like this:
https://stackoverflow.com/a/24471410/4409113
or Jacob's answer
I have a list of items in Listview.
In each row, I have Text and image. Currently, the click effect is there for the entire row. I want to add a specific click effect to text view and image.
How to do that?
I guess you have a custom adapter for your listview... so if you override the getView method, there you can set the onclick listener for each of your views.
image.setOnClickListener(new OnClickListener()
{
#Override
public void onClick()
{
// Do something
}
});
and
text.setOnClickListener(new OnClickListener()
{
#Override
public void onClick()
{
// Do something
}
});
Now, Doyou want the same listener defined in onItemClickListener in each of your views? easy: you can define your performance in another method, and only call it where you want.
I hope this help
In my app, a GridView has list of contents. Each item is inflated with a layout. Single item inside the gridview contains, an image and 2 textviews.
I have a requirement that when I click on the image, the image should be replaced with another image and when I click on any other places it should open a popup. I am able to listen to the second event, using OnItemClickListener. It opens the popup. How can I handle the first case? I mean how can I listen to OnClick event of image?
In your view adapter, when you set the image resource, also set an onClickListener for the ImageView.
In my case, holder is a temporary static class which holds 2 TextViews and an ImageView.:
holder.mThumbnailImageView = (ImageView) convertView.findViewById(R.list.thumb);
holder.mThumbnailImageView.setImageResource(thisOrder.getIconValue());
holder.mThumbnailImageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(parent.getContext(), "image clicked: " + view.getId(), Toast.LENGTH_SHORT).show();
}
});
Hi I am using a Listview in my application and I created separate xml for the layout of each row of that ListView. Each row contains two ImageView and one One TextView. I want to get which ImageView is clicked on that row.
You can set OnClickListener in Adapter class itself inside getView() and get the Click Listener working for both the images. As, you haven't posted any code it not feasible to guess.
put the tag with each imageView in getView function of the adapter....
imageView.setTag(Postion);
and get in onclick with view that you received......
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
system.out.println("position"+position)
}});