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Android ListView with Many-To-Many relationship


Android ListView with Many-To-Many relationship

By : user2950640
Date : November 17 2020, 11:55 AM
wish of those help Definitely #2. Database access is slow, so you want to minimize the number of database queries.
code :


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Android - How would it be possible to make a ListView to mimic the android notifications ListView programmatically?

Android - How would it be possible to make a ListView to mimic the android notifications ListView programmatically?


By : Daklyn
Date : March 29 2020, 07:55 AM
seems to work fine you can see the examples for listveiw
Android ListView from a many to many db relationship

Android ListView from a many to many db relationship


By : Tasnur
Date : March 29 2020, 07:55 AM
I hope this helps . Well, actually, it's a multicriterion thing: time, space, updates, search, etc. So there's no single recipe. It's very probable, however, that multiple queries will bog down scrolling. Worse, on some devices only. A temporary table may or may not be OK depending on the overall size of your data. And you may want to keep this redundant table in sync with the main one, making simultaneous updates to both.
One of the simplest trade-offs could be adding a redundant TEXT/CLOB column with the tag data (XML, JSON, other markup/separated format) to TAB_ARTICLES and keeping it in sync with your detail data. By the way, you will really need the M:M schema only if your queries substantiate that. Otherwise, the single table would suffice.
Android Listview -How to set listview in getview() override. Listview taking parent layout instead of listview

Android Listview -How to set listview in getview() override. Listview taking parent layout instead of listview


By : Andrey Los
Date : March 29 2020, 07:55 AM
I hope this helps you . I have posted this earlier in forums but I guess I am not clear . I have a sidebar Listview and a main panel which contains my controls. I want to highlight the active item in listview in oncreate() as a new activity is launched for each click in sidebar. Here is my listview layout for reference- , here is your problem
in your activity you do this
code :
setContentView(R.layout.layout2);
View view =inflater.inflate(R.layout.layout2,parent,false);
Android ListView: how to avoid database query in bindView()? Need to fetch one to many relationship data

Android ListView: how to avoid database query in bindView()? Need to fetch one to many relationship data


By : Rahulkumar Razz
Date : March 29 2020, 07:55 AM
I hope this helps . Just got an idea: use another cursor loader inside the list item. So this will be like two level cursor loader. I'll post my results later.
Edit:
code :
// In the list view activity:

    @Override
    public void bindView(View view, Context context, Cursor cursor) {

        AlbumListItem albumListItem = (AlbumListItem)view;

        albumListItem.prepareView(getLoaderManager(), cursor);
    }

// AlbumListItem is a class that has a cursor loader to query photos:
public class AlbumListItem extends RelativeLayout implements LoaderManager.LoaderCallbacks<Cursor>{


public void prepareView(LoaderManager loaderManager, Cursor albumCursor){

    albumId = albumCursor.getLong(albumCursor.getColumnIndex(AlbumsColumns._ID));
    // Other init stuff

    loaderManager.initLoader(UNIQUE_LOADER_ID, null, this);
}

@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {

    // Here is the async query part.

    return new CursorLoader(context, PhotosColumns.CONTENT_URI, null, PhotosColumns.ALBUM_ID + " = ?", new String[]{Long.toString(albumId)}, null);
}

}
Nested Listview in Xamarin.Android - Trying with Listview inside Listview

Nested Listview in Xamarin.Android - Trying with Listview inside Listview


By : Steffen Engel
Date : March 29 2020, 07:55 AM
may help you . there are two methods to achieve it.
1.custom a ListView ,override OnMeaSure method like this:
code :
class MyListView :ListView
{
    protected MyListView(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
    {
    }

    public MyListView(Context context) : base(context)
    {
    }

    public MyListView(Context context, IAttributeSet attrs) : base(context, attrs)
    {
    }

    public MyListView(Context context, IAttributeSet attrs, int defStyleAttr) : base(context, attrs, defStyleAttr)
    {
    }

    public MyListView(Context context, IAttributeSet attrs, int defStyleAttr, int defStyleRes) : base(context, attrs, defStyleAttr, defStyleRes)
    {
    }

    protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        int expandSpec = MeasureSpec.MakeMeasureSpec(Integer.MaxValue >> 2,
            MeasureSpecMode.AtMost);
        base.OnMeasure(widthMeasureSpec, expandSpec);
    }
}
LinearLayout list = (LinearLayout) listitem.findViewById(R.id.list_layout);
list.removeAllViews();
for (var i = 0; i < mItem[position].LIBROS.Count(); i++) {
        TextView textView = new TextView(context); // you could custon View here
        textView.Text = mItem[position].LIBROS[i].Descripcion;
        lista.Add(textView );

    }
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