I have a database and adapter for the first activity showing the name and description. There is a button on each list item which takes you to the second activity displaying a unique image related to that item.
I have included an Intent from the first activity to the second activity.
So on the second activity I would like to add the image related to the item clicked.
Question:
(a)Do I include the image in the same database for the first activity or do I need a separate database and adapter for the second activity?
(b)Also do I need to create a separate intent for each item in the first activity as each item has a separate image that it will link to via the button which will be displayed on the second activity.
Your click listener will be one and generic as same lite item view is inflated for all items of adapter.
2.on click you need to pass the Uri string to second activity via intent and display the image Uri in second activity after receiving it from getIntent() in oncreateview() of second activity.
I would like to answer this in two parts.
Part 1: the database: You should use the same table for the image as well. You can always talk to the same database and all the tables from any activity, so no need to have a separate database. So the name, description and image in the same activity.
Part 2: The intent
If you are in a scenario where you have to add any action on click of an adapter item, always use a callback.
When you click on any item, this callback will tell you in the activity that which item in the adapter is clicked.
This medium blog is a very good example to demonstrate this.
In this blog's code, there is a block in adapter where you pass the values from the activity. It is the constructor.
RecyclerViewAdapter(RecyclerViewClickListener listener) {
mListener = listener;
}
If you had added some code, it would help, but I am sure you also have this constructor in your code, so add this listener along with the other data and see how it works out.
Thanks
Related
I have a cart program, in activity is simple, there was a recyclerview and a button. In recycler view I can edit its stock.
Now, I want to get that product_name and product_stock from that I've ever clicked and make changes.
Now, when every stock has been clicked, I want click button on activity, so I want that data I've ever clicked on recyclerview stored to array, so that button can do their action / function. Can you guys lead me, how to import data from recyclerview to its activity itself.
It was Android program to do shopping cart, so I click the data in recycler view it stored to activity array.
I don't have any idea how to store that from recyclerview to activity's array.
My expected result, should be, when I click buy button on activity, every changed stock on recyclerview is shown.
You can simply implement an interface in your adapter like this for getting the values from clicked position in recycleview.
public interface FetchRecyclerViewItems{
void getItems(String product_name,String product_stock);
}
And simply create a setter method for this interface in adapter like this,
private FetchRecyclerViewItems fetchRecyclerViewItems;
public void setFetchRecyclerViewItems(FetchRecyclerViewItems fetchRecyclerViewItems){
this.fetchRecyclerViewItems = fetchRecyclerViewItems;
}
Then set the values like this on your click like this in OnBindViewHolder,
your_view.setOnClickListener(new View.SetOnClickListener)....{
....
fetchRecyclerViewItems.getItems(product_nameFromPosition,product_stockFromPosition);
}
And implement this interface in your activity and you will get the product_name,product_stock values there.
Make sure to initialize the FetchRecyclerViewItems in your activity.
I am statring programming in Android and i have problem. I must create something like this : https://www.google.pl/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http%3A%2F%2Fwww.technotalkative.com%2Fandroid-asynchronous-image-loading-in-listview%2F&ei=R3UKVdTXHoOGzAPO2oKQBw&bvm=bv.88528373,d.bGQ&psig=AFQjCNFkuC6H_DmyQz44Xy2xYZOnb7fAtA&ust=1426835140929053
but after clicked i need to go to second activity with bigger clicked image and descriptiont (e.g On the image is some place and under is description this place)
For this moment i have first activity ImageView+TextView(title) but i do not know how i can get something what let me identifiers clicked image and send send to second activity.
Any ideas ?
I found topic like this :
How can i pass image view between activities in android but this not resolve my problem.
Edit:
I have 2 xml activity for now :
First main activity with listview and second with linearlayout+Imageview+TextView. I use this tutorial for create firs screen :
http://javastart.pl/static/programowanie-android/wlasny-widok-listowy/
Create an OnItemClickListener and set it on your listview. The listener's onClick method is then called whenever you click an entry in the list. It has a parameter 'position' which tells you which row of the list got clicked. Now you can get the URL of the clicked image using imageUrl[position] (following your example).
Now start your second activity and pass that URL along like so:
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("imageUrl", imageUrl[position]);
startActivity(intent);
In your second Activity, put this in the onResume method:
String imageUrl = getIntent().getStringExtra("imageUrl");
Voila, you've passed the url of the clicked image along to the second activity. Now just load it into your ImageView and you're done.
you can send bitmap of image in list via intent to other activity , so you will not need to load it again check attached answer
Or Try to use cached image library like that leocadiotine/WebCachedImageView
and pass link string via intent
I have 2 list views :
- The first one is instantiated in a fragment
- The second one in a activity.
They display the same information
On click on a list item, I open another activity to display item detail.
Depending on the calling activity/fragment, I want to render a different layout, so I need to know in the activity that render the detail of a item, which activity created the intent ?
getCallingActivity and getParentActivityIntent seems to be declarative and fixe, isn"t it ? in my case there are both null.
How can I do that ?
You can pass an argument with your intent as:
intent.putExtra("ParentActivity", "ActivityA");
or
intent.putExtra("ParentActivity", "ActivityB");
In your next activity, use this:
String parentActivity = getIntent().getStringExtra("ParentActivity");
And render the layout according to result.
Hope it helps.
I'm new to Android development.
I created a simple master-detail app that starts with a simple, vertical scrolling list of topics.
When the user selects a topic, a details screen appears, replacing the first screen, with a list of details that pertain to the selected topic.
I want the title for the details screen to show the topic the user has selected on the first page, but haven't been able to solve the problem after working for almost a week.
All I need to know is, Can this be done? Not looking for someone to solve this for me, but maybe a hint or a link to a tutorial that shows how this can be done.
Note: I'd post a drawing of what I want to do, but I'm new here and don't have 10 reputation yet.
Thanks,
SonCoder
Not exactly sure what you want but either way..
-You have a listview. Each view (the data) in the listview should be a represented by a model. (aka a separate class containing specific information that you want to represent for each listitem.
-Write a custom list adapter (extend from base adapter).
http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/
In the getView method of this class you load the the String field of the model that you want in the textview.
-Make sure to use the viewholder pattern in the adapter above. I noticed the example doesnt use one. This speeds up scrolling in the list because there are much fewer calls to findViewById.
-in the list activity set up a View onClick listener. This should create an intent (for launching an activity) or a fragment transaction (for fragments). Send the instance of your entire model (will get from
parent.getAdapter().getItem(position);
in the on click method) into the detail activity.
-if you want to set a textview title just get the textview and set it from the model. It will be the same filed you inflated in the getView method of the adapter.
-if you want to set the titile in the actionbar set:
this.getActionBar().setTitle(title)
This is simple. Just send extra data in the intent that starts the activity and then in the activity's onCreate read the data and then use the setTitle(myString) method from the activity.
setTitle(String title) can be called from anywhere using the activity by the way.
So, your in your listadapter, then you set a listener on your view right? A simple onClickListener on the whole "root" view is just fine.
In the listener you say something in the ways of this:
Intent intent = new Intent(myActivity, MySubActivity.class);
intent.putExtra(key, titleName);
myActivity.startActivity(intent);
Note that the activity reference should be set in the constructor of the adapter and that the "key" String is something you get from your strings.xml. Do not duplicate these in code since if you change one and forget to change the others you might get some wierd NPEs.
Continue in your MySubActivity's onCreate()
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
String key = getString(R.string.my_title_key);
String title = intent.getString(key);
setTitle(title);
}
NOTE: I'm not sure of all method names are correct and such but something like this.
I have a XML layout which has two edit text fields, one for "title" and the the other for "story". When the user enters his data in these text fields and presses the back button the entry gets saved in a list view as the title set. The list view is present in an activity say A1. Now A1 extends Activity.
Whenever an item in the list is "long clicked" a context menu appears with edit, delete and read buttons. If the edit button is pressed I need to open another activity which can edit the data entered in the text fields corresponding to the item clicked. Also I'd be needing the id and the position of the item clicked in the list.
I am using list variable of type ListView to add my adapter. Also I am checking the edit, delete and read options of the context menu in the `public boolean onContextItemSelected(MenuItem item)' method.
How can I get the id and the position of the item clicked from here?
in adapter you make a getter and setter of your item. When long click listener, put setter your item in there.
You should store your "title" and "story" in database and you can get it form database in a new activity
I would think the best way to do this is to create an instance variable (declared after class definition and before onCreate) for the listview and assign the list view to it in onCreate(). Then you will be able to access the listview from your onContextItemSelected() method and pass them to your new activity
If you could post some of your code we should be able to help more.
I second Th0rndike's comments above. It is much easier to help someone if the question is readable and there is a good chance the answer will be accepted.