Question

我想在按下保存按钮时将所选的微调器项插入数据库。有两个旋转器。一个是从数组填充而另一个是从sqlite d / b填充。如何为两个微调器获取所选项的字符串。我的代码如下：

公共类addLecture扩展AppCompatActivity实现AdapterView.OnItemSelectedListener {

Spinner spinner_day;
Spinner spinner_subject;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add_lecture);

    spinner_subject = (Spinner) findViewById(R.id.spinner_subject);
    spinner_day = (Spinner) findViewById(R.id.spinner_day);

    loadSpinner_subjectData();
    loadSpinner_dayData();
}


private void loadSpinner_subjectData(){
    SubjectDbHelper subjectDbHelper=new SubjectDbHelper(getApplicationContext());
    List<String> spinner_name=subjectDbHelper.getSpinnerItem();

    ArrayAdapter<String> spinner_adapter= new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,spinner_name);
    spinner_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner_subject.setAdapter(spinner_adapter);
}

private void loadSpinner_dayData(){

    String day_name[]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};

    ArrayAdapter<String> spinner_dayAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,day_name);
    spinner_dayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner_day.setAdapter(spinner_dayAdapter);

}

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
  //not working  String label=parent.getItemAtPosition(position).toString();

 // not working   String spinner_item_day=spinner_day.getItemAtPosition(position).toString();

 /*not working   SQLiteCursor subject=(SQLiteCursor)parent.getItemAtPosition(position);
    String spinner_item_subject=String.valueOf(subject.getString(position));*/

  //log is not shown  Log.d("spinner",spinner_item_day);

}

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

}

}

Answer 1

在你的ItemSelectedListener中，你没有指定它正在侦听哪个微调器，所以你的代码应该是这样的：

spinner_day.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

            String selectedDay = (String) parent.getItemAtPosition(position);
            // or parent.getSelectedItem();
        }

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

        }
    });

同样适用于其他微调器，试试这个，如果这不起作用，请告诉我。

获取微调器

1 个答案: