1. How do I use Alertdialog to display a list?
- Use the AlertDialog.Builder.setItems method.
- Defining the Dialoginterface.onclicklistener Listener in Setitems
2. How do I use Alertdialog to implement a radio button?
- Defines a string array that is used to populate the options
- New A Alertdialog.builder object
- Setsinglechoiceitems (array, -1,new onclicklistener{})
3. How do I use Alertdialog to achieve multiple selections?
- Defines a string array that is used to populate the options
- New A Alertdialog.builder object
- Setmultichoiceitems (array, new boolean[]{default},new Dialoginterface.onmultichoiceclicklistener () {...})
4. How do I change the location of the dialog?
- Use the Window object to get the object of the dialog box at the location of the Windows, Window Window=alertdialog.getwindow ();
- Then use Window.setgravity (gravity.top| Gravity.left) Setting the location
5. How do I change the transparency of a dialog box?
- Object that gets the position of the dialog window using the Window object, window Window=alertdialog.getwindow ();
- Get windowmanager.layoutparams layout parameters using Window.getattributes
- You can then set the alpha in the layout parameter to a floating-point number
- Finally, call the Window object window.setattributes to reset the overridden properties.
6. Please write out the Java code that displays a toast message box?
- Toast Texttoast=toast.maketext (This, "My Information", Toast.length_long);
- Texttoast.show ();
7. How can I customize the length of the toast display?
- A reflection mechanism is needed to implement
- Call Toast.TN.show to display, call Toast.TN.hide to close
- So you need to get the MTN variable (reflection implementation) from the Toast object first
- The Show method is then always obtained from the TN object (reflection implementation)
8. Describe the steps to display a Notificationmanager object on the status bar?
- Get the Notificationmanager object first, Getsystemservice (Notification_service) to get the object
- Directly create a notification,new Notification (R.drawable.icon, "message ...", System.currenttimemillis ());
- Create an associated application class, Pendingintent object, Pendingintent.getactivity (This,0,getintent (), 0), guarantee program shutdown, object not freed
- Set notification details, Notification.setlatesteventinfo (this, "cooler weather, attention to add clothing", Pendingintent object);
- Display notifications to manage instances with notifications. Notify (R.drawable.icon,notification)
9. What can I do to bring up an activity after clicking notification?
- Use the Pendingintent.getactivity method to get a Pendingintent object that creates a class for the associated application. The Instant app is closed and the object is still there.
- Call Mode: Notification.setlatesteventinfo (this, "message title", "Message content", above Pendingintent object).
- How to send a broadcast: Pendingintent.getbroadcast (this,1,intent,pendingintent.flag_update_current);
- How to start the service: Pendingintent.getservice (this,1,intent,pendingintent.flag_update_current);
10. How do I clear notification from the status bar?
- Using the Notificationmanager.cancel method
11. How do I customize notification?
- Remoteviews class to mate, often used for notifications and desktop widgets
- Mode of Use: Remoteviews remoteviews=new remoteviews (Getpackagename (), r.layout. Layout name);
- Notice how to associate: notification.contentview=remoteviews;
12. Describe how you can add an option menu to an activity?
- Implementing the Activity.oncreateoptionsmenu Method
- Adding menus is added by menu.add
13. How do I customize the Options menu?
- The custom Options menu simulates the Options menu with the Popupwindow object.
- Display and close the custom Options menu by overriding onkeydown.
Android Interview Collection dialog box, information tips and menus
