Android创建Menu菜单

import android.app.Activity;

import android.content.Intent;
import android.os.Bundle;
import android.provider.Settings;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

public class TestandroidActivity extends Activity {
    @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // TODO Auto-generated method stub
   super.onCreateOptionsMenu(menu);
   MenuInflater inflater = getMenuInflater();
   inflater.inflate(R.menu.menu, menu);
   return true;
    }

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

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  // TODO Auto-generated method stub
  switch(item.getItemId())
  {
  case R.id.settings:
   startActivity(new Intent(this,com.test.Settings.class));
   return true;
  }
  return false;
 }
}

import android.os.Bundle;
import android.preference.PreferenceActivity;

public class Settings extends PreferenceActivity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  addPreferencesFromResource(R.xml.settings);
 }
}