菜单项MenuListener。。其实就是这种方法替换了OnOpetionsSelectedItem方法

------------------------------------main.java-----------------------------

package com.example.mm;


import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.SubMenu;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {

private EditText edit;
@Override
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edit = (EditText) findViewById(R.id.txt);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// -------------向menu中添加字体大小的子菜单-------------
SubMenu fontMenu = menu.addSubMenu("字体大小");
// 设置菜单的图标
fontMenu.setIcon(R.drawable.font);
// 设置菜单头的图标
fontMenu.setHeaderIcon(R.drawable.font);
// 设置菜单头的标题
fontMenu.setHeaderTitle("选择字体大小");
MenuItem font10 = fontMenu.add("10号字体");
MenuItem font12 = fontMenu.add("12号字体");
MenuItem font14 = fontMenu.add("14号字体");
MenuItem font16 = fontMenu.add("16号字体");
MenuItem font18 = fontMenu.add("18号字体");
//依次为每个菜单项绑定监听器
font10.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextSize(10 * 2);
return false;
}
});
font12.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextSize(12 * 2);
return false;
}
});
font14.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextSize(14 * 2);
return false;
}
});
font16.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextSize(16 * 2);
return false;
}
});
font18.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextSize(18 * 2);
return false;
}
});
// -------------向menu中添加普通菜单项-------------
MenuItem plain = menu.add("普通菜单项");
plain.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
Toast toast = Toast.makeText(MainActivity.this
, "单击了普通菜单项", Toast.LENGTH_SHORT);
toast.show();
return false;
}
});
// -------------向menu中添加文字颜色的子菜单-------------
SubMenu colorMenu = menu.addSubMenu("字体颜色");
colorMenu.setIcon(R.drawable.color);
// 设置菜单头的图标
colorMenu.setHeaderIcon(R.drawable.color);
// 设置菜单头的标题
colorMenu.setHeaderTitle("选择文字颜色");
MenuItem redItem = colorMenu.add("红色");
MenuItem greenItem = colorMenu.add("绿色");
MenuItem blueItem = colorMenu.add("蓝色");
//依次为每个菜单项目绑定监听器
redItem.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextColor(Color.RED);
return false;
}
});
greenItem.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextColor(Color.GREEN);
return false;
}
});
blueItem.setOnMenuItemClickListener(new OnMenuItemClickListener()
{
@Override
public boolean onMenuItemClick(MenuItem item)
{
edit.setTextColor(Color.BLUE);
return false;
}
});
return super.onCreateOptionsMenu(menu);
}

}

。。。。。。。。。。。。。。。。main.xml。。。。。。。。。。。。。。。。。。。。

android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
android:id="@+id/txt" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="用于测试的内容"
android:editable="false"
/>