[Android]自定义系统菜单的背景

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:sodinoopen@hotmail.com * @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>

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