android-spinner下拉框的使用

一、在xml文件添加spinner标记

二、在java文件拿到该控件，同时来些数据

三、来一个arrayadapter适配器，绑定适配器

四、添加监听事件

五、总代码

spinner1 = this.findViewById(R.id.spinner);
        List<String> list = new ArrayList<>();
        list.add("体育");
        list.add("音乐");
        list.add("文学");
        list.add("礼仪");
        ArrayAdapter adapter = new ArrayAdapter(MainActivity.this, android.R.layout.simple_spinner_item, list);
        spinner1.setAdapter(adapter);

        spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    
    
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    
    
                switch (position){
    
    
                    case 0:
                        Toast.makeText(MainActivity.this,"你点击了体育",Toast.LENGTH_SHORT).show();
                        break;
                    case 1:
                        Toast.makeText(MainActivity.this,"你点击了音乐",Toast.LENGTH_SHORT).show();
                        break;
                    case 2:
                        Toast.makeText(MainActivity.this,"你点击了文学",Toast.LENGTH_SHORT).show();
                        break;
                    case 3:
                        Toast.makeText(MainActivity.this,"你点击了礼仪",Toast.LENGTH_SHORT).show();
                        break;
                }
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
    
    

            }
        });

效果：