从微调器填充编辑文本

Question

我正在处理代码，例如，用户选择名为FabricA的织物，当他选择它时，它需要使用FabricA价格填充编辑文本。 我试图实现它，但我无法获得在编辑文本中显示的价格。我将名称和价格存储在两个不同的数组中。我应该将其存储在同一个数组中吗？

这是我的代码：

try {
ConnectionHelper conStr = new ConnectionHelper();
connect = conStr.connectionclass();
if (connect == null) {
Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
} else {
String query = "select * from cc_fabric";
stmt = connect.prepareStatement(query);
rs = stmt.executeQuery();
ArrayList<String> dataF = new ArrayList<>();
ArrayList<String> dataFP = new ArrayList<>();
while (rs.next()) {
String id = rs.getString("FABRIC_NAME");
String price = rs.getString("FABRIC_UNIT_PRICE");// value of database
dataF.add(id);
dataFP.add(price);
}
ArrayAdapter NoCoreAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, dataF);
Fabric.setAdapter(NoCoreAdapter);
}
} catch (SQLException e) {
e.printStackTrace();
}
Fabric.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
String name = Fabric.getSelectedItem().toString();
String price = Fabric.getSelectedItem().toString();
fabricPrice.setText(price);
Toast.makeText(Calc_140_plain.this, name, Toast.LENGTH_SHORT)
.show();
}
public void onNothingSelected(AdapterView<?> parent) {
}
});

代码没有填充我的编辑文本

Answer 1

在活动类中声明HashMap实例成员

private HashMap<String,String> hashmap;

然后更改您的代码，例如：

try {
ConnectionHelper conStr = new ConnectionHelper();
connect = conStr.connectionclass();
if (connect == null) {
Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
} else {
String query = "select * from cc_fabric";
stmt = connect.prepareStatement(query);
rs = stmt.executeQuery();
ArrayList<String> dataF = new ArrayList<>();
hashMap = new HashMap<>();
while (rs.next()) {
String id = rs.getString("FABRIC_NAME");
String price = rs.getString("FABRIC_UNIT_PRICE");// value of database
hashMap.put(id,price);
dataF.add(id);
}
ArrayAdapter NoCoreAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, dataF);
Fabric.setAdapter(NoCoreAdapter);
}
} catch (SQLException e) {
e.printStackTrace();
}

Fabric.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
String name = Fabric.getSelectedItem().toString();
String price = hashMap.get(name);
fabricPrice.setText(price);
Toast.makeText(Calc_140_plain.this, name, Toast.LENGTH_SHORT)
.show();
}
public void onNothingSelected(AdapterView<?> parent) {
}sss            });

Answer 2

下面是有关如何设置自定义适配器的示例

val titles = mutableListOf<TitleBean>()
titles.addAll(allTitleTypes)
spinner_title.adapter = ArrayAdapter(this, R.layout.item_spinner, titles)

将根据覆盖的toString()填充值

您可以像这样读取值：

(spinner_title.selectedItem as TitleBean).id

上面示例中使用的示例TitleBean

data class TitleBean(
var id: String = "",
var titleName: String = ""
) {
@Ignore
override fun toString(): String {
return titleName
}
}

注意：该示例以kotlinlang 为单位。但是，想法是相同的。