Android的spinner获取索引和设置显示第几项

我就是我 2022-12-09 02:41 8阅读 0赞

//选择业务类型的下拉
        Spinner mSpinner;
     //业务类型下拉
        void businessTypeSelect() { 
            String[] arr = { "门店要货", "门店退货", "店间调货"};
            ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, arr) { 
            };
            mSpinner = findViewById(R.id.spinner_businessType_allocationList);
            mSpinner.setAdapter(adapter);
    
            mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
                @Override
                public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
                    //获取下拉的索引
                    if (mSpinner.getSelectedItemPosition() == 0) { 
                        Toast.makeText(getBaseContext(), "你选中的选项为" + mSpinner.getSelectedItemPosition(), Toast.LENGTH_SHORT).show();
    
                    } else if (mSpinner.getSelectedItemPosition() == 1) { 
                        Toast.makeText(getBaseContext(), "你选中的选项为" + mSpinner.getSelectedItemPosition(), Toast.LENGTH_SHORT).show();
    
                    } else if (mSpinner.getSelectedItemPosition() == 2) { 
                        Toast.makeText(getBaseContext(), "你选中的选项为" + mSpinner.getSelectedItemPosition(), Toast.LENGTH_SHORT).show();
                    }
    //设置显示的的某一项来显示
    mSpinner.setSelection(2);//显示第三项来显示
     mSpinner.setSelection(0);//显示第二项来显示
     mSpinner.setSelection(1);//显示第一项来显示
                }
    
                @Override
                public void onNothingSelected(AdapterView<?> parent) { 
    
                }
            });
        }