Android之自定义系统菜单栏背景

来源：互联网发布：matlab优化算法工具箱编辑：程序博客网时间：2024/05/21 11:31

关键代码为重写Layout.Factory.onCreateView()方法自定义布局，不复杂，所以不多说，简单的几段代码：

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>