Android应用开发笔记 - 项目代码2_《android移动应用开发案例教程》源代码rar-优快云博客

本文链接：https://blog.youkuaiyun.com/xiaobin_HLJ80/article/details/8046680

本文详细介绍了如何在Android应用中实现菜单和上下文菜单的功能，包括菜单项的创建、显示、响应事件等关键步骤。通过使用Java语言和相关API，实现了基本的文件操作菜单和自定义上下文菜单，提供了用户友好的交互体验。

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1.2 菜单

MainActivity.java

package com.example.testmenu;

import android.os.Bundle;
import android.app.Activity;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

	private static final int MENU_FILE_1 = Menu.FIRST;
	private static final int MENU_EXIT_2 = Menu.FIRST + 1;
	
	String[] phones = {
			"HTC Rezound",  "Samsung Galaxy S II Skyrocket", 
    		"Samsung Galaxy Nexus", "Motorola Droid Razr", 
    		"Samsung Galaxy S", "Samsung Epic Touch 4G", 
    		"iPhone 4S", "HTC Titan"
    		};
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        ListView listView = (ListView) findViewById(R.id.list01);
        
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.listitem,
        		phones);
        
        listView.setAdapter(adapter);
        
        registerForContextMenu(listView);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        //getMenuInflater().inflate(R.menu.activity_main, menu);
    	MenuInflater menuInflater = getMenuInflater();
    	menuInflater.inflate(R.menu.my_menu, menu);
        return true;
    }
    
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
    		ContextMenuInfo menuInfo) {
    	// TODO Auto-generated method stub
    	if (v.getId() == R.id.list01) {
    		MenuInflater popmenuInflater = getMenuInflater();
    		popmenuInflater.inflate(R.menu.pop_menu, menu);
    		super.onCreateContextMenu(menu, v, menuInfo);
    	}
    }
    
    @Override
    public boolean onContextItemSelected(MenuItem item) {
    	// TODO Auto-generated method stub
    	TextView text = (TextView) findViewById(R.id.footer);
    	
    	switch (item.getItemId()) {
		case R.id.edt01:
			text.setText("Edit Selected");
			
			return true;

		case R.id.del01:
			text.setText("Delete Selected");
			
			return true;
			
		case R.id.about01:
			Toast.makeText(this, "This is software author: xiaobin.", Toast.LENGTH_SHORT).show();
			
			return true;
			
		default:
			
			return super.onContextItemSelected(item);
		}
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
    	// TODO Auto-generated method stub
    	switch (item.getItemId()) {
		case MENU_FILE_1:
			fileMenu();
			
			break;

		case MENU_EXIT_2:
			exitMenu();

			break;
			
		default:
			break;
		}
    	
    	return false;
    }
    
    private void fileMenu() {
    	// TODO My-generated method stub
    }
    
    private void exitMenu() {
    	// TODO My-generated method stub
    }
    
}

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