Copy Data Between ArrayLists of Different Types

[Adam Wentz]

I have two ArrayLists of different types:

ArrayList<ApplicationInfo> installedApps = new ArrayList<ApplicationInfo>();

AND

final ArrayList<Applications> listApps = getListData();

In my private method

getListData()

, I need to copy all of the data from first ArrayList to the second ArrayList.

private ArrayList<Applications> getListData() {
        
        //Copy data from ArrayList<Applications> to ArrayList<ApplicationInfo>


        return //results;
    }

[Norm Radder]

Do you have a method that can convert the objects in the source ArrayList to the datatype the target ArrayList takes?
Then write a loop to access, convert and store each item.

Are the classes related at all?  Is one the super of the other?

[Adam Wentz]

Norm Radder wrote:Do you have a method that can convert the objects in the source ArrayList to the datatype the target ArrayList takes?
Then write a loop to access, convert and store each item.

Are the classes related at all?  Is one the super of the other?

I am using PackageManager to get a list of user-installed applications. They are stored in installedApps.

I need to display them in a ListView, but I can't get the array from the PackageManager to display to the ListView, so I was going to copy the data to an intermediary ArrayList, which is what listApps is for.

[Campbell Ritchie]

I am afraid that doesn't answer Norm's question.

[Norm Radder]

Why are the datatypes of the elements in the two ArrayLists different?  It would be simpler if they were the same.

I can't get the array from the PackageManager to display to the ListView

What is the problem?  Copy full text of any error messages and paste it here.

[Pete Letkeman]

Adam Wentz wrote:I need to display them in a ListView, but I can't get the array from the PackageManager to display to the ListView, so I was going to copy the data to an intermediary ArrayList, which is what listApps is for.

I was able to find a few examples of this sort of thing looking for "PackageManager to display to the ListView" in Google which are listed below:

http://www.androprogrammer.com/2013/10/get-installed-application-in-list-view.html

https://xjaphx.wordpress.com/2011/06/12/create-application-launcher-as-a-list/

http://stacktips.com/tutorials/android/how-to-get-list-of-installed-apps-in-android

http://theopentutorials.com/tutorials/android/listview/how-to-get-list-of-installed-apps-in-android/

Maybe you should be look into the RecyclerView which has largely replaced ListView.
Don't get me wrong, ListView have they purposes and they are still 100% valid, but a RecyclerView can do everything a ListView can and more.
However the ListView cannot do everything that the RecyclerView can do (or not at easily).

[Adam Wentz]

Pete Letkeman wrote:

Adam Wentz wrote:I need to display them in a ListView, but I can't get the array from the PackageManager to display to the ListView, so I was going to copy the data to an intermediary ArrayList, which is what listApps is for.

I was able to find a few examples of this sort of thing looking for "PackageManager to display to the ListView" in Google which are listed below:

http://www.androprogrammer.com/2013/10/get-installed-application-in-list-view.html

https://xjaphx.wordpress.com/2011/06/12/create-application-launcher-as-a-list/

http://stacktips.com/tutorials/android/how-to-get-list-of-installed-apps-in-android

http://theopentutorials.com/tutorials/android/listview/how-to-get-list-of-installed-apps-in-android/

Maybe you should be look into the RecyclerView which has largely replaced ListView.
Don't get me wrong, ListView have they purposes and they are still 100% valid, but a RecyclerView can do everything a ListView can and more.
However the ListView cannot do everything that the RecyclerView can do (or not at easily).

Thanks, Pete! I ended up finding what I needed in this tutorial you referenced: http://theopentutorials.com/tutorials/android/listview/how-to-get-list-of-installed-apps-in-android/

[Pete Letkeman]

You are welcome Adam. I'm glad that you were able to come up with a solution for your problem.