Android编程实现自定义系统菜单背景的方法

本文实例讲述了android编程实现自定义系统菜单背景的方法。分享给大家供大家参考，具体如下：

不多说，上图，见代码。

package lab.sodino.menutest;
import android.content.context;
import android.app.activity;
import android.os.bundle;
import android.os.handler;
import android.util.attributeset;
import android.view.inflateexception;
import android.view.layoutinflater;
import android.view.menu;
import android.view.menuinflater;
import android.view.menuitem;
import android.view.view;
import android.widget.toast;
/**
 * @author sodino e-mail:[e-mail]
 * @version time：2011-1-26 下午04:42:04
 */
public class menuact extends activity {
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
  }
  public boolean oncreateoptionsmenu(menu menu) {
    super.oncreateoptionsmenu(menu);
    menuinflater inflater = new menuinflater(getapplicationcontext());
    inflater.inflate(r.menu.menu, menu);
    setmenubackground();
    return true;
  }
  public boolean onoptionsitemselected(menuitem item) {
    string info = "";
    switch (item.getitemid()) {
    case r.id.menu_add:
      info = "add";
      break;
    case r.id.menu_delete:
      info = "delete";
      break;
    case r.id.menu_home:
      info = "home";
      break;
    case r.id.menu_help:
      info = "help";
      break;
    default:
      info = "null";
      break;
    }
    toast toast = toast.maketext(this, info, toast.length_short);
    toast.show();
    return super.onoptionsitemselected(item);
  }
  // 关键代码为重写layout.factory.oncreateview()方法自定义布局
  protected void setmenubackground() {
    menuact.this.getlayoutinflater().setfactory(new android.view.layoutinflater.factory() {
      /**
       * name - tag name to be inflated.<br/>
       * context - the context the view is being created in.<br/>
       * attrs - inflation attributes as specified in xml file.<br/>
       */
      public view oncreateview(string name, context context, attributeset attrs) {
        // 指定自定义inflate的对象
        if (name.equalsignorecase("com.android.internal.view.menu.iconmenuitemview")) {
          try {
            layoutinflater f = getlayoutinflater();
            final view view = f.createview(name, null, attrs);
            new handler().post(new runnable() {
              public void run() {
                // 设置背景图片
                view.setbackgroundresource(r.drawable.menu_background);
              }
            });
            return view;
          } catch (inflateexception e) {
            e.printstacktrace();
          } catch (classnotfoundexception e) {
            e.printstacktrace();
          }
        }
        return null;
      }
    });
  }
}

/res/menu/menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:id="@+id/menu_add" android:title="add" android:icon="@drawable/menu_add"></item>
  <item android:id="@+id/menu_delete" android:title="delete" android:icon="@drawable/menu_delete"></item>
  <item android:id="@+id/menu_home" android:title="home" android:icon="@drawable/menu_home"></item>
  <item android:id="@+id/menu_help" android:title="help" android:icon="@drawable/menu_help"></item>
</menu>

希望本文所述对大家android程序设计有所帮助。