How to update App Widget with list view from an Activity

Question

I know this has been asked for many times but I went through the documentation from top to bottom, read all answers here and none of them helped. To be honest, each answer says

Answer 1

I had a widget implementation in my project. I have modified the below code so that data in widget can be changed from one of my Activity in application. Only showing the essential code for your specific use case.

Here I am having a button with text in my widget. Through login button click in my Activity , I am modifying the button text in my widget

Below is my AppWidgetProvider.java class

public class AppWidgetTrackAsset extends AppWidgetProvider{
      @Override
      public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        // Perform this loop procedure for each App Widget that belongs to this provider
        final int N = appWidgetIds.length;

        for (int i=0; i

Below is my Activity where I am updating the widget button text on click of my login button
LoginActivity.java

public class LoginActivity extends AppCompatActivity implements View.OnClickListener{

  Button loginButton;
  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        loginButton=(Button)findViewById(R.id.loginButton);
        loginButton.setOnClickListener(this);

    }
    @Override
    public void onClick(View v) {
        if(v.getId() == R.id.loginButton){
            updateWidget();
        }
    }
    private void updateWidget(){
        try {
            Intent updateWidget = new Intent(this, AppWidgetTrackAsset.class);
            updateWidget.setAction("update_widget");
            PendingIntent pending = PendingIntent.getBroadcast(this, 0, updateWidget, PendingIntent.FLAG_CANCEL_CURRENT);
            pending.send();
        } catch (PendingIntent.CanceledException e) {
            Log.e(Constants.UI_LOG,"Error widgetTrial()="+e.toString());
        }
    }
}

Layout for app widget goes like this

app_widget_track_asset.xml

Below is the manifest file essential part for widget