我正在处理这样的代码,例如,用户选择了一个名为FabricA的结构,当他选择它时,它需要使用FabricA价格填充一个编辑文本。我已经尝试实现它,但是我无法获得要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阵列中吗?
这是我的代码:
def Graph(placeholder):
# I want to store the first value of placeholder in "u"
u = tf.get_variable('x', dtype=tf.float32, trainable=False)
# Some calculation including 'u'
# For example, y = 0.7 * placeholder - u
return y
该代码不会填充我的编辑文本
答案 0 :(得分:0)
以下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()
您可以这样读取值:
(spinner_title.selectedItem as TitleBean).id
以上示例中使用的示例TitleBean
data class TitleBean(
var id: String = "",
var titleName: String = ""
) {
@Ignore
override fun toString(): String {
return titleName
}
}
注意:该示例在kotlin
lang中。但是,想法是一样的。
答案 1 :(得分:0)
在活动类中声明HashMap
实例成员
private HashMap<String,String> hashmap;
然后像这样更改代码:
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<>();
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 });