安卓——sunMenue子菜单

短命女 2022-05-29 13:00 236阅读 0赞

![70][]![70 1][]![70 2][]

activity\_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.example.lenovo.submenue.MainActivity">
    
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hello World!"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    
    </android.support.constraint.ConstraintLayout>

menu文件夹下的main.xml

MainActivity.java

package com.example.lenovo.submenue;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.Menu;
    import android.view.MenuInflater;
    import android.view.MenuItem;
    import android.view.SubMenu;
    import android.widget.Toast;
    
    public class MainActivity extends Activity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
    
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            //return super.onCreateOptionsMenu(menu);
    
            /*
            //代码添加子菜单
            //给Menue加入两个子菜单并获得这两个子菜单
            SubMenu file=menu.addSubMenu("文件");
            SubMenu edit=menu.addSubMenu("编辑");
    
            file.add(1,1,1,"新建");
            file.add(1,2,1,"打开");
            file.add(1,3,1,"保存");
            file.setHeaderTitle("文件操作");
            file.setHeaderIcon(R.mipmap.ic_launcher);
            edit.add(2,1,1,"复制");
            edit.add(2,2,1,"粘贴");
            edit.add(2,3,1,"剪切");
            edit.setHeaderTitle("编辑操作");
            edit.setHeaderIcon(R.mipmap.ic_launcher);
            */
    
            /*
            main.xml文件添加子菜单
             */
            MenuInflater inflater=getMenuInflater();
            inflater.inflate(R.menu.main,menu);
            return true;
        }
    
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            /*
            //这部分对应代码添加子菜单的那部分
            if(item.getGroupId()==1){
                switch(item.getItemId())
                {
                    case 1:
                        Toast.makeText(MainActivity.this,"点击了新建",Toast.LENGTH_SHORT).show();
                        break;
                    case 2:
                        Toast.makeText(MainActivity.this,"点击了打开",Toast.LENGTH_SHORT).show();
                        break;
                    case 3:
                        Toast.makeText(MainActivity.this,"点击了保存",Toast.LENGTH_SHORT).show();
                        break;
                }
            }else if(item.getGroupId()==2){
                switch(item.getItemId())
                {
                    case 1:
                        Toast.makeText(MainActivity.this,"点击了复制",Toast.LENGTH_SHORT).show();
                        break;
                    case 2:
                        Toast.makeText(MainActivity.this,"点击了粘贴",Toast.LENGTH_SHORT).show();
                        break;
                    case 3:
                        Toast.makeText(MainActivity.this,"点击了剪切",Toast.LENGTH_SHORT).show();
                        break;
                }
            }*/
            switch (item.getItemId())
            {
                case R.id.new_file:
                    Toast.makeText(MainActivity.this,"点击了新建",Toast.LENGTH_SHORT).show();
                    break;
                case R.id.open_file:
                    Toast.makeText(MainActivity.this,"点击了打开",Toast.LENGTH_SHORT).show();
                    break;
                case R.id.save_file:
                    Toast.makeText(MainActivity.this,"点击了保存",Toast.LENGTH_SHORT).show();
                    break;
                case R.id.c_edit:
                    Toast.makeText(MainActivity.this,"点击了复制",Toast.LENGTH_SHORT).show();
                    break;
                case R.id.v_edit:
                    Toast.makeText(MainActivity.this,"点击了粘贴",Toast.LENGTH_SHORT).show();
                    break;
                case R.id.x_edit:
                    Toast.makeText(MainActivity.this,"点击了剪切",Toast.LENGTH_SHORT).show();
                    break;
    
            }
    
            return true;
        }
    }

[70]: https://img-blog.csdn.net/20180324145258211?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODE5OTc3MA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 1]: https://img-blog.csdn.net/20180324154217432?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODE5OTc3MA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 2]: /images/20220529/99aeccfb26c647ef9e9b5b58ea2f8ea1.png