我正在处理EditText
和Spinner
。当我为EditText
设置文字时,它很好,但是当我尝试为Spinner
设置文字时,它会给出错误。
这是设置文字EditText
New_Name.setText(NewName);
此处New_Name为EditText
这是设置文字Spinner
New_Quantity.setText(NewQuantity);
此处New_Quantity为Spinner
这是完整的代码。
public class UpdateFoodActivity extends Activity {
EditText Name_Search,New_Name,New_Calorie,New_Fat,New_Protein,New_Sugar,New_carbohydrates;
Spinner New_Quantity;
TextView title_text;
String SearchName,NewName,NewQuantity,NewCalorie,NewFat,NewProtein,NewSugar,Newcarbohydrates;
FoodDbHelper foodDbHelper;
SQLiteDatabase sqLiteDatabase;
Button UpdateButton;
ArrayAdapter<CharSequence> adapter;
private Button button1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.update_food_activity);
Name_Search = (EditText)findViewById(R.id.name_search);
New_Name = (EditText)findViewById(R.id.new_name);
New_Quantity = (Spinner)findViewById(R.id.new_quantity);
adapter = ArrayAdapter.createFromResource(this, R.array.quant, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
New_Quantity.setAdapter(adapter);
New_Quantity.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
New_Calorie = (EditText)findViewById(R.id.new_calorie);
New_Fat = (EditText)findViewById(R.id.new_fat);
New_Protein = (EditText)findViewById(R.id.new_protein);
New_Sugar = (EditText)findViewById(R.id.new_sugar);
New_carbohydrates = (EditText)findViewById(R.id.new_vitamins);
UpdateButton = (Button)findViewById(R.id.update_button);
title_text = (TextView)findViewById(R.id.title_text);
New_Name.setVisibility(View.GONE);
New_Quantity.setVisibility(View.GONE);
New_Calorie.setVisibility(View.GONE);
New_Fat.setVisibility(View.GONE);
New_Protein.setVisibility(View.GONE);
New_Sugar.setVisibility(View.GONE);
New_carbohydrates.setVisibility(View.GONE);
UpdateButton.setVisibility(View.GONE);
title_text.setVisibility(View.GONE);
}
public void searchFood(View view){
SearchName = Name_Search.getText().toString();
foodDbHelper = new FoodDbHelper(getApplicationContext());
sqLiteDatabase = foodDbHelper.getReadableDatabase();
Cursor cursor = foodDbHelper.getFood(SearchName,sqLiteDatabase);
if (cursor.moveToFirst()) {
NewQuantity = cursor.getString(0);
NewCalorie = cursor.getString(1);
NewFat = cursor.getString(2);
NewProtein = cursor.getString(3);
NewSugar = cursor.getString(4);
Newcarbohydrates = cursor.getString(5);
NewName = SearchName;
New_Name.setText(NewName);
New_Quantity.setText(NewQuantity);
New_Calorie.setText(NewCalorie);
New_Fat.setText(NewFat);
New_Protein.setText(NewProtein);
New_Sugar.setText(NewSugar);
New_carbohydrates.setText(Newcarbohydrates);
New_Name.setVisibility(View.VISIBLE);
New_Quantity.setVisibility(View.VISIBLE);
New_Calorie.setVisibility(View.VISIBLE);
New_Fat.setVisibility(View.VISIBLE);
New_Protein.setVisibility(View.VISIBLE);
New_Sugar.setVisibility(View.VISIBLE);
New_carbohydrates.setVisibility(View.VISIBLE);
UpdateButton.setVisibility(View.VISIBLE);
title_text.setVisibility(View.VISIBLE);
}
else
{
Toast.makeText(getApplicationContext(),
"No Dish Found " ,
Toast.LENGTH_SHORT).show();
}
}
public void updatebutton(View view)
{
foodDbHelper = new FoodDbHelper(getApplicationContext());
sqLiteDatabase = foodDbHelper.getWritableDatabase();
String name,quantity,calorie,fat,protein,sugar,carbohydrates;
name = New_Name.getText().toString();
quantity = New_Quantity.getSelectedItem().toString();
calorie = New_Calorie.getText().toString();
fat = New_Fat.getText().toString();
protein = New_Protein.getText().toString();
sugar = New_Sugar.getText().toString();
carbohydrates = New_carbohydrates.getText().toString();
int count = foodDbHelper.updateInformation(SearchName,name,quantity,calorie,fat,protein,sugar,carbohydrates,sqLiteDatabase);
Toast.makeText(getApplicationContext(),count+" dish updated",Toast.LENGTH_LONG).show();
Intent intent = new Intent(this,UpdateFoodActivity.class);
startActivity(intent);
}
}
答案 0 :(得分:1)
为了向微调器添加条目,您需要定义一个适配器,我举个例子:
$(document).ready(function(e) {
if (screen.width > 736) {
}
else {
var mouseX;
var mouseY;
mouseX = e.pageX;
mouseY = e.pageY;
$(".kunden-item").on('click', function(event){
$("#divId").show().css( {position:"absolute", top:event.pageY, left: event.pageX});
});
$(".kunden-item").mouseout(function(){
$('#divId').fadeOut('middle');
});
}
});
答案 1 :(得分:0)
Spinner
喜欢ListView
,需要一个适配器来呈现数据。简单来说,适配器是一组项目。 (如您所见ListView
始终包含项目列表以及Spinner)。尽管如此,spinner
的适配器通常是一个字符串列表。 (因为spinner
只代表用户选择)
在您的示例中,您只需创建ArrayAdapter
并再次分配给Spinner
。
private void setTextForSpinner(Spinner spinner) {
String[] items = {"Stack", "Over", "Flow"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);
spinner.setAdapter(adapter);
}
如果将以上代码应用于您的示例,您可以再次更改为:
private void setTextForSpinner(Spinner spinner, String NewName) {
String[] items = {NewName};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);
spinner.setAdapter(adapter);
}
希望这有帮助:)