Android 自定义系统菜单的背景源码

Android 自定义系统菜单的背景源码

01package lab.sodino.menutest;

02import

03android.content.Context;

04import android.app.Activity;

05import android.os.Bundle;

06import android.os.Handler;

07import android.util.AttributeSet;

08import android.view.InflateException;

09import android.view.LayoutInflater;

10import android.view.Menu;

11import android.view.MenuInflater;

12import android.view.MenuItem;

13import android.view.View;

14import android.widget.Toast;

15/**

16* @author Sodino E-mail:[e-mail]

17* @version Time：2011-1-26 下午04:42:04

18*/

19public class MenuAct extends Activity {

20@Override

21public void onCreate(Bundle savedInstanceState) {

22super.onCreate(savedInstanceState);

23setContentView(R.layout.main);

24}

25public boolean onCreateOptionsMenu(Menu menu) {

26super.onCreateOptionsMenu(menu);

27MenuInflater inflater = new MenuInflater(getApplicationContext());

28inflater.inflate(R.menu.menu, menu);

29setMenuBackground();

30return true;

31}

32public boolean onOptionsItemSelected(MenuItem item) {

33String info = "";

34switch (item.getItemId()) {

35case R.id.menu_add:

36info = "Add";

37break;

38case R.id.menu_delete:

39info = "Delete";

40break;

41case R.id.menu_home:

42info = "Home";

43break;

44case R.id.menu_help:

45info = "Help";

46break;

47default:

48info = "NULL";

49break;

50}

51Toast toast = Toast.makeText(this, info, Toast.LENGTH_SHORT);

52toast.show();

53return super.onOptionsItemSelected(item);

54}

55// 关键代码为重写Layout.Factory.onCreateView()方法自定义布局

56protected void setMenuBackground() {

57MenuAct.this.getLayoutInflater().setFactory(newandroid.view.LayoutInflater.Factory() {

58/**

59* name - Tag name to be inflated.<br/>

60* context - The context the view is being created in.<br/>

61* attrs - Inflation attributes as specified in XML file.<br/>

62*/

63public View onCreateView(String name, Context context, AttributeSet attrs) {

64// 指定自定义inflate的对象

65if (name.equalsIgnoreCase("com.android.internal.view.menu.IconMenuItemView")) {

66try {

67LayoutInflater f = getLayoutInflater();

68final View view = f.createView(name, null, attrs);

69new Handler().post(new Runnable() {

70public void run() {

71// 设置背景图片

72view.setBackgroundResource(R.drawable.menu_background);

73}

74});

75return view;

76} catch (InflateException e) {

77e.printStackTrace();

78} catch (ClassNotFoundException e) {

79e.printStackTrace();

80}

81}

82return null;

83}

84});

85}

86}

　　/res/menu/menu.xml

view source

print?

1<?xml version="1.0" encoding="utf-8"?>

2<menu xmlns:android="http://schemas.android.com/apk/res/android">

3<item android:id="@+id/menu_add" android:title="Add"android:icon="@drawable/menu_add"></item>

4<item android:id="@+id/menu_delete" android:title="Delete"android:icon="@drawable/menu_delete"></item>

5<item android:id="@+id/menu_home" android:title="Home"android:icon="@drawable/menu_home"></item>

6<item android:id="@+id/menu_help" android:title="Help"android:icon="@drawable/menu_help"></item>

7</menu>