Android学习-实现处理菜单和子菜单的点击事件

今天学习了一下子菜单的做法，主要是重写这两个方法实现，效果见下图，很简单很基础

onCreateOptionsMenu

onOptionsItemSelected

 

 代码

 

 

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:title="listview效果"
        android:id="@+id/list_view">
        <menu>
            <item
                android:id="@+id/list_view_vertical_stander"
                android:title="垂直标准"
                ></item>
            <item
                android:id="@+id/list_view_vertical_reverse"
                android:title="垂直反向"
                ></item>
            <item
                android:id="@+id/list_view_horizontal_stander"
                android:title="水平标准"
                ></item>
            <item
                android:id="@+id/list_view_horizontal_reverse"
                android:title="水平反向"
                ></item>
        </menu>
    </item>
    <item android:title="gridview效果"
        android:id="@+id/grid_view">
        <menu>
            <item
                android:id="@+id/grid_view_vertical_stander"
                android:title="垂直标准"
                ></item>
            <item
                android:id="@+id/grid_view_vertical_reverse"
                android:title="垂直反向"
                ></item>
            <item
                android:id="@+id/grid_view_horizontal_stander"
                android:title="水平标准"
                ></item>
            <item
                android:id="@+id/grid_view_horizontal_reverse"
                android:title="水平反向"
                ></item>
        </menu>
    </item>
    <item android:title="瀑布流效果"
        android:id="@+id/stagger_view">
        <menu>
            <item
                android:id="@+id/stagger_view_vertical_stander"
                android:title="垂直标准"
                ></item>
            <item
                android:id="@+id/stagger_view_vertical_reverse"
                android:title="垂直反向"
                ></item>
            <item
                android:id="@+id/stagger_view_horizontal_stander"
                android:title="水平标准"
                ></item>
            <item
                android:id="@+id/stagger_view_horizontal_reverse"
                android:title="水平反向"
                ></item>
        </menu>
    </item>

</menu>

package com.example.recyclertest;

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

import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
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) {
        //菜单的方法
        //ctrl+p看方法参数
        getMenuInflater().inflate(R.menu.menu,menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        //子菜单
        switch (item.getItemId()){

            //listview
            case R.id.list_view_vertical_stander:
                Toast.makeText(this, "点击list,垂直标准", Toast.LENGTH_SHORT).show();
                break;
            case R.id.list_view_vertical_reverse:
                Toast.makeText(this, "点击list,垂直反向", Toast.LENGTH_SHORT).show();
                break;
            case R.id.list_view_horizontal_stander:
                Toast.makeText(this, "点击list,水平标准", Toast.LENGTH_SHORT).show();
                break;
            case R.id.list_view_horizontal_reverse:
                Toast.makeText(this, "点击list,水平反向", Toast.LENGTH_SHORT).show();
                break;

            //gridview
            case R.id.grid_view_vertical_stander:
                Toast.makeText(this, "点击grid,垂直标准", Toast.LENGTH_SHORT).show();
                break;
            case R.id.grid_view_vertical_reverse:
                Toast.makeText(this, "点击grid,垂直反向", Toast.LENGTH_SHORT).show();
                break;
            case R.id.grid_view_horizontal_stander:
                Toast.makeText(this, "点击grid,水平标准", Toast.LENGTH_SHORT).show();
                break;
            case R.id.grid_view_horizontal_reverse:
                Toast.makeText(this, "点击grid,水平反向", Toast.LENGTH_SHORT).show();
                break;

            //staggerview
            case R.id.stagger_view_vertical_stander:
                Toast.makeText(this, "点击stagger,垂直标准", Toast.LENGTH_SHORT).show();
                break;
            case R.id.stagger_view_vertical_reverse:
                Toast.makeText(this, "点击stagger,垂直反向", Toast.LENGTH_SHORT).show();
                break;
            case R.id.stagger_view_horizontal_stander:
                Toast.makeText(this, "点击stagger,水平标准", Toast.LENGTH_SHORT).show();
                break;
            case R.id.stagger_view_horizontal_reverse:
                Toast.makeText(this, "点击stagger,水平反向", Toast.LENGTH_SHORT).show();
                break;
        }


        return super.onOptionsItemSelected(item);
    }

}