android menu 基础

Activity在要实现Menu,需要重写下面的几个方法:

创建Menu:

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		
		getMenuInflater().inflate(R.menu.main, menu);
		
		 
		return super.onCreateOptionsMenu(menu);
	}

响应Menu事件:

	@Override
	public boolean onMenuItemSelected(int featureId, MenuItem item) {
		switch (item.getItemId())
		{
		case R.id.menu_save:
			Toast.makeText(MainActivity.this,"Save is Selected",Toast.LENGTH_SHORT).show();
			break;
		case R.id.menu_search:
			Toast.makeText(MainActivity.this,"Search is Selected",Toast.LENGTH_SHORT).show();
			break;
		case R.id.menu_share:
			Toast.makeText(MainActivity.this,"Share is Selected",Toast.LENGTH_SHORT).show();
			break;
		case R.id.menu_del:
			Toast.makeText(MainActivity.this,"Del is Selected",Toast.LENGTH_SHORT).show();
			break;
		}
		return super.onMenuItemSelected(featureId, item);
	}

在来看上边R.menu.main

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

    <item
        android:id="@+id/menu_save"
        android:title="Save"/>
    <item
        android:id="@+id/menu_search"
        android:title="Search"/>
    <item
        android:id="@+id/menu_share"
        android:title="Share"/>
    <item
        android:id="@+id/menu_del"
        android:title="Delete"/>

</menu>

其中item 有如下属性,我们可以分别使用下看看什么效果,如下面的标题栏显示等

android:showAsAction="always" 

显示到标题栏, 可以设置图标,也可以将一个layout显示到actionba.

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


    <item
        android:id="@+id/menu_save"
        android:icon="@android:drawable/ic_menu_save"
        android:showAsAction="ifRoom"
        android:title="Save"/>
    <item
        android:id="@+id/menu_search"
        android:icon="@android:drawable/ic_menu_search"
        android:showAsAction="ifRoom"
        android:title="Search"/>
    <item
        android:id="@+id/menu_share"
        android:actionLayout="@layout/activity_main"
        android:icon="@android:drawable/ic_menu_share"
        android:showAsAction="ifRoom|withText"
        android:title="Share"/>
    <item
        android:id="@+id/menu_del"
        android:icon="@android:drawable/ic_menu_delete"
        android:showAsAction="ifRoom|withText"
        android:title="Delete"/>


</menu>

参考链接 :

Menus