[Android] ActionBar Show Overflow (just three buttons behind)

Source: Internet
Author: User

Show more action button for 3 points

We know from the above code that even if we do not show all action buttons on the horizontal screen. We can add a 3-point action button to display the action button with a drop-down display. Information on the Internet, as long as your phone has the menu key Actionbar will not show 3 points of more or 3 points of the menu button.

  1. Private void Getoverflowmenu () {
  2. try {
  3. viewconfiguration config = viewconfiguration.get (this);
  4. Field Menukeyfield = viewconfiguration.  Class.getdeclaredfield ("Shaspermanentmenukey");
  5. if (Menukeyfield! = null) {
  6. Menukeyfield.setaccessible (true);
  7. Menukeyfield.setboolean (config, false);
  8. }
  9. } catch (Exception e) {
  10. E.printstacktrace ();
  11. }
  12. }


This method can be called in the Oncreat () method to display a menu button of 3 points. is the effect of pressing a 3-point action button

    • For many pad: Actionbar space is sufficient to display, then the corresponding menu menu, only not set to Ifroom, and then can be placed in the overflow:
    • For many phones: there are not enough controls in the Actionbar to display all the menus, even if the ifroom is set, many of the menus are still not fully displayed, so: even if you set the Ifroom menu item, and the menu item without the Ifroom set will be placed in the overflow
  1. <menu xmlns:android="http://schemas.android.com/apk/res/android" >
  2. <item
  3. android:id="@+id/menu_settings"
  4. android:orderincategory="
  5. android:showasaction="Never"
  6. android:title="Settings"/>
  7. <item
  8. android:id="@+id/action_refresh"
  9. android:icon="@drawable/navigation_refresh"
  10. android:orderincategory="101"
  11. android:showasaction="Ifroom|withtext"
  12. android:title="Refresh"/>
  13. <item
  14. android:id="@+id/action_about"
  15. android:icon="@drawable/action_about"
  16. android:orderincategory="101"
  17. android:showasaction="Ifroom"
  18. android:title="about"/>
  19. <item
  20. android:id="@+id/action_search"
  21. android:icon="@drawable/action_search"
  22. android:orderincategory="103"
  23. android:showasaction="ifroom"/>
  24. <item
  25. android:id="@+id/action_edit"
  26. android:icon="@android:d rawable/ic_menu_edit"
  27. android:orderincategory=" the"
  28. android:showasaction="Ifroom"
  29. android:title="edit"/>
  30. <item
  31. android:id="@+id/action_help"
  32. android:showasaction="Always"
  33. android:title="Help"/>
  34. <item
  35. android:id="@+id/action_email"
  36. android:icon="@android:d rawable/ic_dialog_email"
  37. android:orderincategory="106"
  38. android:showasaction="Ifroom"
  39. android:title="email"/>
  40. </Menu>
  1. Package com.example.demo_actionbarbasic;
  2. Import Com.example.demo_actionbarbasic. R
  3. Import Android.app.ActionBar;
  4. Import android.app.Activity;
  5. Import android.content.Intent;
  6. Import Android.os.Bundle;
  7. Import Android.view.Menu;
  8. Import Android.view.MenuItem;
  9. Import Android.widget.Toast;
  10. Public class Mainactivity extends Activity {
  11. private MenuItem MenuItem = null;
  12. @Override
  13. protected void OnCreate (Bundle savedinstancestate) {
  14. super.oncreate (savedinstancestate);
  15. Setcontentview (R.layout.activity_main);
  16. //Through the Hilde () and Show () methods to control the hiding and display of Actionbar
  17. //ActionBar ActionBar = Getactionbar ();
  18. //Actionbar.hide ();
  19. //Actionbar.show ();
  20. }
  21. //We can see that the use of Actonbar is the same as the Options menu
  22. @Override
  23. Public Boolean oncreateoptionsmenu (Menu menu) {
  24. //inflate the menu; This adds items to the action bar if it is present.
  25. Getmenuinflater (). Inflate (R.menu.activity_main, menu);
  26. return true;
  27. }
  28. @Override
  29. Public Boolean onoptionsitemselected (MenuItem item) {
  30. switch (Item.getitemid ()) {
  31. Case R.id.action_refresh:
  32. Toast.maketext (This, "menu Item Refresh selected",
  33. Toast.length_short). Show ();
  34. Break ;
  35. Case R.id.action_about:
  36. Toast.maketext (This, "menu Item is about selected", Toast.length_short)
  37. . Show ();
  38. Break ;
  39. Case R.id.action_edit:
  40. Toast.maketext (This, "menu Item Edit selected", Toast.length_short)
  41. . Show ();
  42. Break ;
  43. Case R.id.action_search:
  44. Toast.maketext (This, "menu Item Search selected",
  45. Toast.length_short). Show ();
  46. Break ;
  47. Case R.id.action_help:
  48. Toast.maketext (This, "menu Item settings selected",
  49. Toast.length_short). Show ();
  50. Break ;
  51. Default:
  52. Break ;
  53. }
  54. return super.onoptionsitemselected (item);
  55. }
  56. }

Reprinted from: http://www.cnblogs.com/SharkBin/p/3559213.html

[Android] ActionBar Show Overflow (just three buttons behind)

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