Android-基础教程-menu

Activity  |  Android Developers

android.app.Activity

Public methods

public MenuInflater getMenuInflater ()public boolean onCreateOptionsMenu (Menu menu)public boolean onOptionsItemSelected (MenuItem item)

MenuInflater  |  Android Developers

android.view.MenuInflater

Public constructors

public MenuInflater (Context context)Public methods

public void inflate (int menuRes, Menu menu)

示例代码

resmenumain.xml

MainActivity.java

package com.example.learn_menu;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()){
            case R.id.version_item:
                Toast.makeText(this, "版本号", Toast.LENGTH_SHORT).show();
                break;
            case R.id.about_item:
                Toast.makeText(this, "关于",Toast.LENGTH_SHORT).show();
                break;
            default:
        }
        return true;
    }
}