android 菜单例子

也没什么了就是一个 android菜单的小例子实现步骤如下：
（1）创建一个包含文本视图的XML布局文件。
（2）创建一个Activity类，其中包含在第一步中定义的布局。
（3）设置菜单
（4）向菜单添加一些常规菜单项
（5）向菜单添加一些辅助菜单项
（6）响应菜单项
（7）修改 AndroidManifest.xml文件，以显示应用程序正确的标题

布局文件

<?xml version="1.0" encoding="utf-8"?>
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
android:id="@+id/textViewId"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Debugging Scratch Pad"
    />

Activity类

package xiaohang.zhimeng;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class SampleMenusActivity extends Activity {

Menu myMenu = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    //重写onCreateOptionsMenu 并以编程方式设置菜单
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    // call the parent to attach any system level menus
     super.onCreateOptionsMenu(menu);
     this.myMenu = menu;

     //add a few normal menus
     addRegularMenuItems(menu);

     //add a few secondary menus
     add5SecondaryMenuItems(menu);

     //it must return true to show the menu
     //if it is false menu won't show
     return true;

    }

    //添加常规菜单项
    private void addRegularMenuItems(Menu menu){
    int base = Menu.FIRST; // value is 1

    menu.add(base, base, base, "append");
    menu.add(base, base+1, base+1, "item 2");
    menu.add(base, base+2, base+2, "clear");

    menu.add(base, base+3, base+3, "hide secondary");
    menu.add(base, base+4, base+4, "show secondary");

    menu.add(base, base+5, base+5, "enable secondary");
    menu.add(base, base+6, base+6, "disable secondary");

    menu.add(base, base+7, base+7, "check secondary");
    menu.add(base, base+8, base+8, "uncheck secondary");
    }

    //添加辅助菜单项
    private void add5SecondaryMenuItems(Menu menu){
    //Secondary items are shown just like everything else
    int base=Menu.CATEGORY_SECONDARY;

    menu.add(base, base+1, base+1, "sec. item 1");
    menu.add(base, base+2, base+2, "sec. item 2");
    menu.add(base, base+3, base+3, "sec. item 3");
    menu.add(base, base+4, base+4, "sec. item 4");
    menu.add(base, base+5, base+5, "sec. item 5");

    }

    //响应菜单项单击
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == 1) {
appendText("\nhello");
}
    else if (item.getItemId() ==2) {
appendText("\nitem2");
}
    else if (item.getItemId() == 3) {
emptyText();
}
    else if (item.getItemId() ==4) {
//hide secondary
    this.appendMenuItemText(item);
    this.myMenu.setGroupVisible(Menu.CATEGORY_SECONDARY, false);
}
    else if(item.getItemId() == 5){
    //show secondary
    this.appendMenuItemText(item);
    this.myMenu.setGroupVisible(Menu.CATEGORY_SECONDARY, true);
    }
    else if (item.getItemId() == 6) {
//enable secondary
    this.appendMenuItemText(item);
    this.myMenu.setGroupEnabled(Menu.CATEGORY_SECONDARY, true);
}
    else if(item.getItemId() == 7){
    //disable secondary
    this.appendMenuItemText(item);
    this.myMenu.setGroupEnabled(Menu.CATEGORY_SECONDARY, false);
    }
    else if (item.getItemId() == 8) {
//check secondary
    this.appendMenuItemText(item);
    myMenu.setGroupCheckable(Menu.CATEGORY_SECONDARY, true, false);
}
    else if (item.getItemId() == 9) {
//uncheck secondary
    this.appendMenuItemText(item);
    myMenu.setGroupCheckable(Menu.CATEGORY_SECONDARY, false, false);
}
    else {
this.appendMenuItemText(item);
}
    //should return true if the menu item
    //is handled
    return true;

    }


    //向调试TextView 写入数据的实用程序函数
    //Given  a string of text append it to the TextView
    private void appendText(String text){
    TextView tv = (TextView)this.findViewById(R.id.textViewId);
    tv.setText(tv.getText() + text);
    }

    //Given a menu item append its title to the TextView
    private void appendMenuItemText(MenuItem menuItem){
    String title = menuItem.getTitle().toString();
    TextView tv = (TextView)this.findViewById(R.id.textViewId);
    tv.setText(tv.getText() + "\n" + title);
    }

    //Empty the TextView of its contents
    private void emptyText(){
    TextView tv = (TextView)this.findViewById(R.id.textViewId);
    tv.setText("");
    }
}

AndroidManifest.xml文件

<?xml version="1.0" encoding="utf-8"?>
      package="xiaohang.zhimeng"
      android:versionCode="1"
      android:versionName="1.0">
    
                          android:label="Sample Menus Application">

运行效果如下

[img]http://dl.iteye.com/upload/attachment/461776/80e59777-03a9-3bbd-b5a5-ab705ba38c10.jpg[/img]

[img]http://dl.iteye.com/upload/attachment/461778/65821ac3-ab62-3e67-a2e9-3a6e05980154.jpg[/img]

源码附件

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