Question

当我选择spinner1时，我有两个微调器，它显示类别示例作业，不动产等。而spinner2包含与spinner1中的特定类别相关的子类别，例如如果用户在spinner1中选择作业，则spinner2应仅显示工作子类别，如热门工作，软件，硬件等如果在spinner1房地产，然后在微调二，它应显示租赁，租赁等。我怎样才能实现这一目标？

Answer 1

简单来说，你必须为Spinner 1注册ItemSelectedListener并根据选定的值设置Spinner2的适配器

代码段：

spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                if(position==1)
                  adapterForSpinner2=new ArrayAdapter..... //Depends on your data
                else if(position==2)
                   adapterForSpinner2=new ArrayAdapter.....//Depends on your data

                //Setting up adapter based on selection  
                spinner2.setAdapter(adapterForSpinner2);        
            }

            @Override
            public void onNothingSelected(AdapterView<?> parentView) {
                // your code here
            }

        });

Answer 2

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ddServerName.setOnItemSelectedListener(this);
    ddServerPath.setOnItemSelectedListener(this);

}

@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {

    Toast.makeText(getApplicationContext(), "Item selected local "+adapterView.getItemAtPosition(i).toString(),
            Toast.LENGTH_SHORT).show();
    //sincronizare dropdouwn list
    if (view == ddServerName.getSelectedView()) ddServerPath.setSelection(i);
    else ddServerName.setSelection(i);
}

两个微调器，spinner2取决于spinner1

2 个答案: