Spinner值为Database

Question

我不能让微调器写入数据库。我阅读了关于微调器的文档，但我确实做错了什么。有人可以提一些建议吗？ 我已经阅读了很多教程，但是我感到很困惑。如何让我在输入时让微调器写入onClick中的数据库，想要再加1个包括微调器。

ContextMenu

Answer 1

您需要保留Spinner中的选定值，然后在您用于插入数据库的方法中使用它

另外，您应该在AddData(); btn_save活动中致电onClick！

public class AddActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {

    DatabaseHelper mylogsDB;
    Button btn_save;
    EditText etHours;
    Spinner etShift;
    private String spinnerSelectedItem;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add);
        etHours = (EditText) findViewById(R.id.editText);
        etShift = (Spinner) findViewById(R.id.spinner);
        btn_save = (Button) findViewById(R.id.btn_save);
        mylogsDB = new DatabaseHelper(this);

        btn_save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AddData();
            }
        });

        // Spinner click listener
        etShift.setOnItemSelectedListener(this);

        // Spinner Drop down elements
        List<String> categories = new ArrayList<>();
        categories.add("Πρωί");
        categories.add("Μεσημέρι");
        categories.add("Νύχτα");

        // Creating adapter for spinner
        ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, categories);

        // Drop down layout style - list view with radio button
        dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        // attaching data adapter to spinner
        etShift.setAdapter(dataAdapter);
    }

    public void onItemSelected (AdapterView <?> parent, View view,int position, long id) {
        // On selecting a spinner item
        spinnerSelectedItem = parent.getItemAtPosition(position).toString();

        // Showing selected spinner item
        Toast.makeText(parent.getContext(), "Έχετε επιλέξει: " + spinnerSelectedItem, Toast.LENGTH_LONG).show();
    }


    public void onNothingSelected(AdapterView<?> arg0) {
        // TODO Auto-generated method stub
    }

    public void AddData() {

        String hours = etHours.getText().toString();
        //spinnerSelectedItem should have a value

        if(!hours.equals("") && !spinnerSelectedItem.equals("")){
            boolean insertData = mylogsDB.addData(hours, spinnerSelectedItem);
            if (insertData == true) {
                Toast.makeText(AddActivity.this, "Η αποθήκευση ολοκληρώθηκε επιτυχώς.", Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(AddActivity.this, "Ώχ,Κάτι πήγε στραβά.", Toast.LENGTH_LONG).show();
            }
        }else{
            //do something
        }
    }
}