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[英]Android - How to get the selected item value from a spinner and put it into a string?
[英]How to get Spinner selected item value to string?
我有 5 个微调器。 为了使它总结到这一点。
这是 xml 中的 Spinner
<Spinner
android:id="@+id/text_interested"
android:layout_span="2"
android:layout_width="wrap_content"
android:layout_height="60px"
android:entries="@array/interestedarrays"
android:prompt="@string/interestedprompt" />
这是 Java 中的 Spinner
submitbtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
interested.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(
AdapterView<?> adapterView, View view,
int i, long l) {
interesting = interested.getItemAtPosition(i).toString();
}
public void onNothingSelected(
AdapterView<?> adapterView) {
}
});
}
});
这里的解释:
该页面有一个按钮。 按下此按钮时,将从微调器读取数据。 我用这个检查了输出
System.out.println(interested.getItemAtPosition(i).toString());
它没有给我任何东西,甚至没有。
如何检索值并将其字符串化?
试试这个:
String text = mySpinner.getSelectedItem().toString();
像这样,您可以获得不同 Spinner 的价值。
String Text = mySpinner.getSelectedItem().toString();
要么
mySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Object item = parent.getItemAtPosition(position);
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
您可以使用以下方法从 Spinner 获取所选项目,
interested.getSelectedItem().toString();
试试这个
final Spinner cardStatusSpinner1 = (Spinner) findViewById(R.id.text_interested);
String cardStatusString;
cardStatusSpinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
cardStatusString = parent.getItemAtPosition(pos).toString();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
final Button saveBtn = (Button) findViewById(R.id.save_button);
saveBtn .setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
System.out.println("Selected cardStatusString : " + cardStatusString ); //this will print the result
}
});
如果您的 Spinner 是由 SQLite 游标填充的,那么解决方案是:
Spinner mySpin = (Spinner) findViewById(R.id.myspin);
mySpin.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
SQLiteCursor item = (SQLiteCursor) parent.getItemAtPosition(position);
String value = String.valueOf(item.getString(0));
Toast.makeText(getApplicationContext(), "The option is:" + value , Toast.LENGTH_SHORT).show();
}
PS:在item.getString(0)
-> 0 中是您想要获取的游标item.getString(0)
的索引。
使用 Kotlin 获取所选项目:
spinner.selectedItem.toString()
除了推荐的,
String Text = mySpinner.getSelectedItem().toString();
你可以做,
String Text = String.valueOf(mySpinner.getSelectedItem());
当您从微调器中选择任何值时,您将获得选定的值,
interested.getSelectedItem().toString();
试试这个
sp1 = String.valueOf(spinner.getSelectedItem());
因为 Android 开发的最新语言是 Kotlin。 下面是我们如何使用匿名对象在 Kotlin 中做到这一点。
spinnerName?.onItemSelectedListener = object : AdapterView.OnItemSelectedListener{
override fun onNothingSelected(parent: AdapterView<*>?) {
println("Nothing Selected")
}
override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
val selectedString = yourList[position]
}
}
通过为您的适配器对象实现 SpinnerAdapter,我使用了 Interest.getItem interested.getItem(i).toString()
spinnerType = (AppCompatSpinner) findViewById(R.id.account_type);
spinnerType.setPrompt("Select Type");
spinnerType.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
TypeItem clickedItem = (TypeItem) parent.getItemAtPosition(position);
String TypeName = clickedItem.getTypeName();
Toast.makeText(AddAccount.this, TypeName + " selected", Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
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