Instead of extending, BaseAdapter supports registering a DataSetObserver where you can listen for the onChanged event. The notifyDataSetChanged method will cause this event to fire. adapter.registerDataSetObserver(new DataSetObserver() { @Override public void onChanged() { // … } }); … adapter.notifyDataSetChanged();
BaseAdapter as the name suggests, is a base class for all the adapters. When you are extending the Base adapter class you need to implement all the methods like getCount(), getId() etc. ArrayAdapter is a class which can work with array of data. You need to override only getview() method. ListAdapter is a an interface … Read more
the problem is that you are mis-using the inflator, don’t give null as the root node if you pass null as the root node, all the size parameters you set in the xml fail to work the correct code is view = inflater.inflate(R.layout.lview_row, parent, false); http://www.doubleencore.com/2013/05/layout-inflation-as-intended/
Update: 06-Mar-18 Use MyApplication instance instead of Context instance. Application instance is a singleton context instance itself. public class MyApplication extends Application { private static MyApplication mContext; @Override public void onCreate() { super.onCreate(); mContext = this; } public static MyApplication getContext() { return mContext; } } Previous Answer You can get the the application context … Read more
main.xml: <RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:tools=”http://schemas.android.com/tools” android:layout_width=”match_parent” android:layout_height=”match_parent” android:paddingBottom=”@dimen/activity_vertical_margin” android:paddingLeft=”@dimen/activity_horizontal_margin” android:paddingRight=”@dimen/activity_horizontal_margin” android:paddingTop=”@dimen/activity_vertical_margin” tools:context=”.MainActivity” > <ListView android:id=”@+id/list” android:layout_width=”match_parent” android:layout_height=”wrap_content” android:layout_alignParentLeft=”true” android:layout_alignParentTop=”true” > </ListView> </RelativeLayout> custom.xml: <?xml version=”1.0″ encoding=”utf-8″?> <LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android” android:layout_width=”match_parent” android:layout_height=”match_parent” android:orientation=”vertical” > <LinearLayout android:layout_width=”match_parent” android:layout_height=”wrap_content” > <LinearLayout android:layout_width=”255dp” android:layout_height=”wrap_content” android:orientation=”vertical” > <LinearLayout android:layout_width=”match_parent” android:layout_height=”wrap_content” android:orientation=”vertical” > <TextView android:id=”@+id/title” android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:text=”Video1″ android:textAppearance=”?android:attr/textAppearanceLarge” android:textColor=”#339966″ android:textStyle=”bold” /> </LinearLayout> … Read more
If we look at the following code, we have name and value array in getView and getDropDownView. private void initView() { SpinnerDropDownAdapter sddadapter = new SpinnerDropDownAdapter(this); ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, sddadapter.name); Spinner getViewSP = (Spinner) findViewById(R.id.getview_sp); getViewSP.setAdapter(adapter); Spinner getViewWDropDownSP = (Spinner) findViewById(R.id.getview_w_drop_down_sp); getViewWDropDownSP.setAdapter(sddadapter); } static class SpinnerDropDownAdapter extends BaseAdapter implements SpinnerAdapter { Context … Read more
Here is the difference: BaseAdapter is a very generic adapter that allows you to do pretty much whatever you want. However, you have to do a bit more coding yourself to get it working. ArrayAdapter is a more complete implementation that works well for data in arrays or ArrayLists. Similarly, there is a related CursorAdapter … Read more
Change your method from public void updateReceiptsList(List<Receipt> newlist) { receiptlist = newlist; this.notifyDataSetChanged(); } To public void updateReceiptsList(List<Receipt> newlist) { receiptlist.clear(); receiptlist.addAll(newlist); this.notifyDataSetChanged(); } So you keep the same object as your DataSet in your Adapter.