动态添加SubMenu子菜单

我会带着你远行 2022-09-23 11:54 165阅读 0赞

<?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="com.example.submenu"
        android:versionCode="1"
        android:versionName="1.0" >
    
        <uses-sdk
            android:minSdkVersion="15"
            android:targetSdkVersion="20" />
    
        <application
            android:allowBackup="true"
            android:icon="@drawable/ic_launcher"
            android:label="@string/app_name"
            android:theme="@style/AppTheme" >
            <activity
                android:name=".MainActivity"
                android:label="@string/app_name"
                android:theme="@android:style/Theme.Light.NoTitleBar" >
                
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
    
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
            </activity>
        </application>
    
    </manifest>

package com.example.submenu;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.Menu;
    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) {
            // Inflate the menu; this adds items to the action bar if it is present.
            //getMenuInflater().inflate(R.menu.main, menu);
        	SubMenu file=menu.addSubMenu("文件");
        	SubMenu edit=menu.addSubMenu("编辑");
        	file.setHeaderTitle("文件操作");
        	file.setHeaderIcon(R.drawable.ic_launcher);
        	file.add(1,1,1,"新建");
        	file.add(1,2,1,"打开");
        	file.add(1,3,1,"保存");
        	edit.setHeaderTitle("编辑操作");
        	edit.setHeaderIcon(R.drawable.ic_launcher);
        	edit.add(2,1,1,"复制");
        	edit.add(2,2,1,"粘贴");
        	edit.add(2,3,1,"剪切");
            return true;
        }
    
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // Handle action bar item clicks here. The action bar will
            // automatically handle clicks on the Home/Up button, so long
            // as you specify a parent activity in AndroidManifest.xml.
    //        int id = item.getItemId();
    //        if (id == R.id.action_settings) {
    //            return true;
    //        }
        	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;
    			default:
    				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;
    			default:
    				break;
    			}	
    		}
            return super.onOptionsItemSelected(item);
        }
    }