59 Android app development tutorial for beginners using Android studio | floating context menu

#Android app development tutorial for beginners using Android studio: Context Menu & contextual action mode:
A context menu is a floating menu that appears when a user performs a long click on an element. It provides actions that effect the selected context.

When developing for android 3.0 & higher version you should, instead use contextual action mode to enable actions on selected content.

This mode displays action items that affect the selected contents in a bar at the top of the screen an allows the user to select multiple items.

#Steps for creating floating context menu:
-----------------------------------------------
1) Register the view to which the context menu should be associated by calling registerForContextMenu(-) & pass the view as parameter.

Note: If your activity uses listview or gridview & you want each item to provide the same context menu, then register all items for a context menu by passing the listview or gridview to registerForContextMenu(-)

2) Implement the public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) method in your activity or fragment.

3) Implement the public boolean onContextItemSelected(MenuItem item) when the user selects a menu item, the system calls this method so you can perform the appropriate action.

Note: In context menu we can not see icons, so dont add the icons to the items of context menu from layout_activity.xml but we can add from java code.

4) Providing Icons & titles to context menu:
menu.setHeaderTitle("My items");
menu.setHeaderIcon(R.drawable.icon);

5) Providing view to context menu

ImageView iv=new ImageView(this);
iv.setImageResource(R.drawable.imgeicoc);
menu.setHeaderView(iv);

Note: But if we apply imageview to context menu as icon then setTitle & seticon methods of menu wont work (so apply any one of either 4 or 5 step)