日历对话框

-3

有人能告诉我什么是我做错了，它给了我这个错误错误的第一个参数类型。实测值： 'android.widget.EditText'，必需的： 'java.lang.String中'日历对话框

在布尔为etHours

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

     if (!etHours.equals("") && !spinnerSelectedItem.equals("")) { 
      boolean insertData = mylogsDB.addData(etHours, spinnerSelectedItem); 
      if (insertData) { 
       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 
     }

包com.example.soultaker.multicolumn;

import android.app.DatePickerDialog; 
import android.app.Dialog; 
import android.database.Cursor; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.DatePicker; 
import android.widget.EditText; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import android.widget.Spinner; 
import android.widget.Toast; 
import java.util.Calendar; 
import java.util.*; 
import static com.example.soultaker.multicolumn.Constants.COL0; 
import static com.example.soultaker.multicolumn.Constants.COL2; 
import static com.example.soultaker.multicolumn.Constants.COL3; 


public class AddActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener { 

    private DatabaseHelper mylogsDB; 
    private Button btn_save, btn, btn_edit; 
    private String spinnerSelectedItem; 
    int year_x, month_x, day_x; 
    static final int DIALOG_ID = 0; 
    private EditText etHours; 
    private EditText etID; 
    private Spinner etShift; 
    private ArrayList<HashMap<String, String>> list; 

    @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); 
     etID = (EditText) findViewById(R.id.etID); 
     btn = (Button) findViewById(R.id.btn_choose_date); 
     btn_save = (Button) findViewById(R.id.btn_save); 
     btn_edit = (Button) findViewById(R.id.btn_edit); 
     mylogsDB = new DatabaseHelper(this); 

     ListView listView = (ListView) findViewById(R.id.listView1); 

     final Calendar cal = Calendar.getInstance(); 
     year_x = cal.get(Calendar.YEAR); 
     month_x = cal.get(Calendar.MONTH); 
     day_x = cal.get(Calendar.DAY_OF_MONTH); 
     addData(); 
     UpdateData(); 
     saveData(); 
     showDialogOnButtonClick(); 

     //populate an ArrayList<String> from the database and then view it 
     ArrayList<String> theList = new ArrayList<>(); 
     Cursor data = mylogsDB.showData(); 
     if(data.getCount() == 0){ 
      Toast.makeText(this, "Δεν υπάρχουν καταχωρίσεις",Toast.LENGTH_LONG).show(); 
     }else{ 
      while(data.moveToNext()){ 
       theList.add(data.getString(1)); 
       ListAdapter listAdapter = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,theList); 
       listView.setAdapter(listAdapter); 
      } 
     } 

    } 



    public void showDialogOnButtonClick() { 
     btn.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 

      } 
     }); 
    } 

    protected Dialog onCreateDialog(int id) { 

     if (id == DIALOG_ID) 
      return new DatePickerDialog(this, dpickerListener, year_x, month_x, day_x); 
     return null; 
    } 

    private DatePickerDialog.OnDateSetListener dpickerListener 
      = new DatePickerDialog.OnDateSetListener() { 
     @Override 
     public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { 
      year_x = year; 
      month_x = monthOfYear + 1; 
      day_x = dayOfMonth; 
      Toast.makeText(AddActivity.this, day_x + "." + month_x + "." + year_x, Toast.LENGTH_LONG).show(); 

     } 
    }; 

    public void saveData() { 
     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<>(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_SHORT).show(); 
    } 


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

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

     if (!etHours.equals("") && !spinnerSelectedItem.equals("")) { 
      boolean insertData = mylogsDB.addData(etHours, spinnerSelectedItem); 
      if (insertData) { 
       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 
     } 
     ListView listView = (ListView) findViewById(R.id.listView1); 

     list = new ArrayList<HashMap<String, String>>(); 

     HashMap<String, String> temp = new HashMap<String, String>(); 
     temp.put(COL0, ""); 

     temp.put(COL2, ""); 
     temp.put(COL3, ""); 
     list.add(temp); 

     HashMap<String, String> temp2 = new HashMap<String, String>(); 
     temp2.put(COL0, ""); 

     temp2.put(COL2, ""); 
     temp2.put(COL3, ""); 
     list.add(temp2); 

     HashMap<String, String> temp3 = new HashMap<String, String>(); 
     temp3.put(COL0, ""); 

     temp3.put(COL2, ""); 
     temp3.put(COL3, ""); 
     list.add(temp3); 

     ListViewAdapters adapter = new ListViewAdapters(this, list); 
     listView.setAdapter(adapter); 

     listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, final View view, int position, long id) { 
       int pos = position + 1; 
       Toast.makeText(AddActivity.this, Integer.toString(pos) + " Clicked", Toast.LENGTH_SHORT).show(); 
      } 

     }); 
    } 

    private void UpdateData(){ 
     btn_edit.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       int temp = etID.getText().toString().length(); 
       if (temp > 0) { 
        boolean update = mylogsDB.updateData(etID.getText().toString(), 
          etHours.getText().toString(), etShift.getSelectedItem().toString()); 
        if (update) { 
         Toast.makeText(AddActivity.this, "Successfully Updated Data!", Toast.LENGTH_LONG).show(); 
        } else { 
         Toast.makeText(AddActivity.this, "Something Went Wrong :(.", Toast.LENGTH_LONG).show(); 
        } 
       } else { 
        Toast.makeText(AddActivity.this, "You Must Enter An ID to Update :(.", Toast.LENGTH_LONG).show(); 
       } 
      } 
     }); 
    } 
}

来源

2017-02-23 Kostas Koustoulidis

'mylogsDB.addData（etHours，spinnerSelectedItem）' - 它看起来不是'etHours'像你想'hours'作为第一个参数出现。 –

在'addData（）'中''小时'而不是'etHours'！ –

我用etHours改变了小时，但现在它给了我另一个错误，说明Variable etHours可能没有被初始化。在上面的行中，我称之为字符串。 –

boolean insertData = mylogsDB.addData(etHours, spinnerSelectedItem);

是这条线出现的问题？
尝试更改为类似：

boolean insertData = false; 
if(etHours != null && !etHours.isEmpty()) 
    insertData = mylogsDB.addData(etHours.getText().toString(), spinnerSelectedItem);

如果NullPointerException不断出现访问etHours何时何地，你最好检查你的XML，或者至少登录etHours只是肯定的。

来源

2017-02-23 01:39:03

没有工作。 getText给出了另一个错误。 –

@KostasKoustoulidis这是因为你的'etHours'是'null'。无论如何，我添加了一些空检查代码。 –

说不能解决方法getText –

试试这个，

 private 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) { 
       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 
     }

来源

2017-02-23 02:48:58 user2025187

[Logcat]（https://www.4shared.com/office/sc1XXkaUba/___online.html） –

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