Android PopupMenu-點擊按鈕彈出下拉框

1.建立一個xml文件作爲下拉框界面

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
 
    <item android:id="@+id/exit"
        android:title="退出"/>
    <item android:id="@+id/set"
        android:title="設置"/>
    <item android:id="@+id/account"
        android:title="賬號"/>
</menu>

2.然後在Java文件中

package com.example.menutest03;
 
import android.app.Activity;import android.os.Bundle;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.PopupMenu;
import android.widget.PopupMenu.OnMenuItemClickListener;
import android.widget.Toast;
 
 
public class MainActivity extends Activity implements OnClickListener,OnMenuItemClickListener{
 
    
    private Button button1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button1 = (Button)findViewById(R.id.button1);
        button1.setOnClickListener(this);
    }
 
    //點擊按鈕後，加載彈出式菜單
    @Override
    public void onClick(View v) {
        //創建彈出式菜單對象（最低版本11）
        PopupMenu popup = new PopupMenu(this, v);//第二個參數是綁定的那個view
        //獲取菜單填充器
        MenuInflater inflater = popup.getMenuInflater();
        //填充菜單
        inflater.inflate(R.menu.main, popup.getMenu());
        //綁定菜單項的點擊事件
        popup.setOnMenuItemClickListener(this);
        //顯示(這一行代碼不要忘記了)
        popup.show(); 
        
    }
 
    //彈出式菜單的單擊事件處理
    @Override
    public boolean onMenuItemClick(MenuItem item) {
        // TODO Auto-generated method stub
        switch (item.getItemId()) {
        case R.id.exit:
            Toast.makeText(this, "退出", Toast.LENGTH_SHORT).show();
            break;
        case R.id.set:
            Toast.makeText(this, "設置", Toast.LENGTH_SHORT).show();
            break;
        case R.id.account:
            Toast.makeText(this, "賬號", Toast.LENGTH_SHORT).show();
            break;
        default:
            break;
        }
        return false;
    }
    
}

轉載自:https://blog.csdn.net/xch_yang/article/details/80585041?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task