(android) menu菜单导航（一）

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
</LinearLayout>

.java文件

package gxk.menuActivity;

 
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class menuActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // TODO Auto-generated method stub
  
  menu.add(0, 1, 1, "添加");
  menu.add(0, 2, 2, "删除");
  menu.add(0, 3, 3, "修改");
  menu.add(0, 4, 4, "退出");
  
  return super.onCreateOptionsMenu(menu);
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  // TODO Auto-generated method stub
  if(item.getItemId()==1)
  {
   Toast.makeText(menuActivity.this, "添加", Toast.LENGTH_LONG).show();
  }
  if(item.getItemId()==2)
  {
   Toast.makeText(menuActivity.this, "删除", Toast.LENGTH_LONG).show();
  }
  if(item.getItemId()==3)
  {
   Toast.makeText(menuActivity.this, "修改", Toast.LENGTH_LONG).show();
  }
  if(item.getItemId()==4)
  {
   Intent intent=new Intent();
   intent.setClass(menuActivity.this, menu2.class);
   menuActivity.this.startActivity(intent);
  }
  return super.onOptionsItemSelected(item);
 }

 
 
}