ex01.java

Google Android应用框架原理与程序设计 第三版(中文高清PDF)高焕堂

package com.misoo.ex01;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

public class ex01 extends Activity {
 	public static final int ADD_ID = Menu.FIRST;
    public static final int DELETE_ID = Menu.FIRST + 1;
    public static final int EXIT_ID = Menu.FIRST + 2;
    @Override 
      public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
    }
    @Override
	 public boolean onCreateOptionsMenu(Menu menu) {
	        super.onCreateOptionsMenu(menu);
	        menu.add(0, ADD_ID, 0, R.string.menu_add);
	        menu.add(0, DELETE_ID, 1, R.string.menu_delete);
	        menu.add(0, EXIT_ID, 2, R.string.menu_exit);
	        return true;
	 }
	 @Override
	    public boolean onOptionsItemSelected(MenuItem item) {
	        switch (item.getItemId()) {
	        case ADD_ID:
	            setTitle("Insert...");
	            break;
	        case DELETE_ID:
	            setTitle("Delete...");
	            break;
	        case EXIT_ID:
	            finish();
	            break;
	        }
	        return super.onOptionsItemSelected(item);
	    }
}