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我已經查看了將spinner保存到數據庫中的所有問題，但似乎沒有任何工作。將Spinner選擇保存到SQLite數據庫中
我已經開始在ItemSelectedListener加入工作，但它拋出回一個錯誤，
這裏是我的代碼
的OnItemSelectedListener在這其中我對錶的其餘部分刀片是
public class OnClickListenerCreateMenuItem implements View.OnClickListener {
@Override
public void onClick(View view) {
final Context context = view.getContext();
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View formElementsView = inflater.inflate(R.layout.menuitem_input_form, null, false);
final EditText editTextItemName = (EditText) formElementsView.findViewById(R.id.editTextItemName);
final EditText editTextItemDesc = (EditText) formElementsView.findViewById(R.id.editTextItemDesc);
final EditText editTextItemPrice = (EditText) formElementsView.findViewById(R.id.editTextItemPrice);
final EditText editTextItemCost = (EditText) formElementsView.findViewById(R.id.editTextItemCost);
final Spinner itemCategory = (Spinner) formElementsView.findViewById(R.id.spinnerCategory);
itemCategory.setAdapter(
((SettingsMenuItem) context).loadSpinnerData()
);
itemCategory.setOnItemSelectedListener(
((SettingsMenuItem) context).loadSpinnerData()
);
new AlertDialog.Builder(context)
.setView(formElementsView)
.setTitle("Create Item")
.setPositiveButton("Add",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
String itemName = editTextItemName.getText().toString();
String itemDescription = editTextItemDesc.getText().toString();
String itemPrice = editTextItemPrice.getText().toString();
String itemCost = editTextItemCost.getText().toString();
String valueOfSelectedCat= itemCategory.getSelectedItem().toString();
ObjectMenuItem objectMenuItem = new ObjectMenuItem();
objectMenuItem.name = itemName;
objectMenuItem.description = itemDescription;
objectMenuItem.price = Float.parseFloat(itemPrice);
objectMenuItem.cost = Float.parseFloat(itemCost);
objectMenuItem.cat = valueOfSelectedCat;
boolean createSuccessful = new TableControllerMenuItem(context).create(objectMenuItem);
if(createSuccessful){
Toast.makeText(context, "Item was saved.", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(context, "Unable to save item.", Toast.LENGTH_SHORT).show();
}
((SettingsMenuItem) context).readRecords();
((SettingsMenuItem) context).countRecords();
dialog.cancel();
}
}).show();
}
和我的實際微調器在這裏設置並填充在這裏
public class SettingsMenuItem extends AppCompatActivity {
Spinner spinner;
Context context;
String id;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings_menu_item);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
countRecords();
readRecords();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
Button buttonCreateLocation = (Button) findViewById(R.id.btnAdd);
buttonCreateLocation.setOnClickListener(new OnClickListenerCreateMenuItem());
}
public void countRecords() {
int recordCount = new TableControllerMenuItem(this).count();
TextView textViewRecordCount = (TextView) findViewById(R.id.textViewRecordCount);
textViewRecordCount.setText(recordCount + " records found.");
}
public void readRecords() {
LinearLayout linearLayoutRecords = (LinearLayout) findViewById(R.id.linearLayoutRecords);
linearLayoutRecords.removeAllViews();
List<ObjectMenuItem> menuitem = new TableControllerMenuItem(this).read();
if (menuitem.size() > 0) {
for (ObjectMenuItem obj : menuitem) {
int id = obj.id;
String menuitemName = obj.name;
String menuitemDescription = obj.description;
Float menuitemPrice = obj.price;
Float menuitemCost = obj.cost;
String itemCategory = obj.cat;
String textViewContents = menuitemName;
TextView textViewMenuItem = new TextView(this);
textViewMenuItem.setPadding(0, 10, 0, 10);
textViewMenuItem.setText(textViewContents);
textViewMenuItem.setTag(Integer.toString(id));
textViewMenuItem.setTextSize(20.0f);
textViewMenuItem.setOnLongClickListener(new OnLongClickListenerMenuItem());
linearLayoutRecords.addView(textViewMenuItem);
}
} else {
TextView locationItem = new TextView(this);
locationItem.setPadding(8, 8, 8, 8);
locationItem.setText("No records yet.");
linearLayoutRecords.addView(locationItem);
}
}
public ArrayAdapter loadSpinnerData() {
Log.d("CON", "setting spinner data");
Spinner s = (Spinner) findViewById(R.id.spinnerCategory);
DatabaseHandler h = new DatabaseHandler(getApplicationContext());
List<String> names = h.getAllNames();
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, names);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
return dataAdapter;
}
}
這裏是我的崩潰日誌
---------崩潰 8月2日至14日的開始：29：07.627 14332-14332/com.jenovaprojects.restaurant E/AndroidRuntime：致命異常：主要 過程：com.jenovaprojects.restaurant，PID：14332 java.lang.ClassCastException：android.widget.ArrayAdapter不能在com.jenovaprojects.restaurant.OnClickListenerCreate.OnClickListenerCreateMenuItem.onClick被強制轉換爲android.widget.AdapterView $ OnItemSelectedListener （OnClickListenerCreateMenuItem .java：41） at android.view.View.performClick（View.java:5204） at android.view.View $ PerformClick.run（View.java:21156） at android.os.Handler.handleCallback（Handler.java:739） at android.os.Handler.dispatchMessage（Handler.java:95） at android.os.Looper.loop（Looper.java:148） at android.app.ActivityThread.main（ActivityThread.java:5466） at java.lang.reflect.Method.invoke（Native Method） at com .android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726） 在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）