问题
I have implemented the spinner by populating the array list through database.I can get and show the array list in my spinner array adapter but if I select the item in spinner it does not shown in spinner?What I had mistake here?
Here is my code,
Spinner spinner1 = (Spinner) findViewById(R.id.prospin);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, providerlist);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
I get the selected item string by using this,
Spinner provid = (Spinner)findViewById(R.id.prospin);
String provider =provid.getSelectedItem().toString();
Can anyone help me out pls!!!
回答1:
This answer may be a little stupid but try it. It worked for me.
- Check the background color of your spinner!
- And if it`s white change it
- Enjoy it!
回答2:
I got same problem and solved by adding notifyDataSetChanged() after binding data in Spinner.
First of all I have bind adapter with Blank ArrayList then getting List of Items from Server and added to that List but forgot to notifyDataSetChanged() after updated List.
just add adapter.notifyDataSetChanged(); after updating list.
Hope it will helpful.
回答3:
Problem:
Spinner displays neither the default nor selected item value. But drop-down menu items are show when selected.
Cause:
Background and text color both being white!!!
Solutions:
xml(Preferable):
Write a custom layout for a spiner item and use it instead of the default,android.R.layout.simple_spinner_item.
How to change spinner text size and text color?
Code(Less reliable):
your_spinner_instance.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){
public void onItemSelected(AdapterView<?> parent, View view, int pos,
long id) {
((TextView) view).setTextColor(Color.RED);
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
Android needs some major update or maybe dart and flutter should take over...
Thanks Catluc
回答4:
Use wrap_content for the height of Spinner.
Probably it does not have enough height to show text.
回答5:
if you have a custom adapter you should change the TextView text color
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView view = (TextView) super.getView(position, convertView, parent);
view.setTextColor(Color.parseColor("#000000"));
return view;
}
and if you don't have a custom adapter you should just change spinner background
回答6:
Well this also happens if the context is not properly given. I was using getApplicationContext() where as it needs getBaseContext().
回答7:
Check these links:
- http://www.technotalkative.com/android-spinner-example/
- http://www.mkyong.com/android/android-spinner-drop-down-list-example/
Else, try to store it on selecting the item:
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapter, View v,
int position, long id) {
// On selecting a spinner item
String item = adapter.getItemAtPosition(position).toString();
// Showing selected spinner item
Toast.makeText(getApplicationContext(),
"Selected Country : " + item, Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
回答8:
use android:spinnerMode="dropdown" attribute in your declared Spinner element's xml
回答9:
Try this.
final ArrayList<String> providerlist= new ArrayList<String>();
Spinner spinner1 = (Spinner) findViewById(R.id.prospin);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, providerlist);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// On selecting a spinner item
String item = providerlist.get(position);
// Showing selected spinner item
Toast.makeText(this,
"Selected Country : " + item, Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
回答10:
Generally spinners gets selected by default when they are used ,so try to set blank,or any other data to first position that is zero position, you will get exact position of you selected item .
回答11:
The issue from what I found was with the style sheet.Use this
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="windowNoTitle">false</item>
<item name="windowActionBar">true</item>
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
For the xml layout use this
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fitsSystemWindows="true"
android:paddingBottom="5dp"
style="@style/AppTheme">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="5dp"
android:paddingLeft="24dp"
android:paddingRight="24dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Spinner"
android:layout_marginTop="10dp"
android:textColor="@color/colorBlack"/>
<Spinner
android:id="@+id/Spinner"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:backgroundTint="@color/colorPrimary"
android:textColorHint="#05ab9a"
android:padding="15dp"
style="@style/Base.Widget.AppCompat.Spinner.Underlined"
tools:targetApi="lollipop" />
</LinearLayout>
</ScrollView>
And finally for the class
String [] NUMBERS= {"3 ","6 ","13 "};
Spinner s_spinner = (Spinner) findViewById(R.id.Spinner);
ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<>(this,
android.R.layout.simple_dropdown_item_1line, NUMBERS);
// Specify the layout to use when the list of choices appears
spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
s_spinner.setAdapter(spinnerAdapter );
回答12:
This answer may be a little stupid but if you do the same mistake then try... set values to your ArrayList first and then assign that arrayList to spinner. I declared a global arrayList and set it to spinner first and then add values to it from another method... at that time i faced the same problem. Otherwise you can do notifyDataSetChanged() to your arrayList.
回答13:
try this code==>
ArrayAdapter<String> stateNameAdaptor = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, stateNameList);
stateNameAdaptor.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnState.setAdapter(stateNameAdaptor);
回答14:
Wierd. I had the same problem. What I did to make it work : 1. Add some initial data to the list ( ex.--- please select - -) 2. Load the rest of data and add it to the list 3. Call adapter.notifyDatasetChaged()
回答15:
I just had this problem and after trying all of the solutions listed found out that the issue was that I had set the spinner layout_width to 60dp.
Changed it to fill_parent and problem solved.
回答16:
For me the problem is that I was using getApplicationContext(). When I replace getApplicationContext() with this it works fine.
ArrayAdapter<*> adapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, documentsCategories);
回答17:
You should use the first Spinner to get the values.
Try the following code:
String provider = spinner1.getSelectedItem().toString();
What you are doing is getting the default value of the spinner.
回答18:
Try This code
ArrayAdapter<String> arrayAdapte=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item,states);
arrayAdapte.setDropDownViewResource(android.R.layout.simple_list_item_1 );
spinnerState.setAdapter(arrayAdapte);
String data=spinnerState.getSelectedItem().toString(); // this is select particular item from list;
int position=spinnerState.getSelectedItemPosition(); // this return position of data selected in list;
回答19:
You have to do some changes as:
Spinner spinner1 = (Spinner) findViewById(R.id.prospin);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, providerlist);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
instead of "android.R.layout.simple_spinner_dropdown_item"
adapter1.setDropDownViewResource(android.R.layout.simple_list_item_activated_1);
Use "android.R.layout.simple_list_item_activated_1"
spinner1.setAdapter(adapter1);
It will highlight the selected value accordingly. Selected color is chosen by your apps default theme.
For more information follow below link: https://developer.android.com/reference/android/R.layout.html#simple_list_item_activated_1
回答20:
out_marginLeft="50dp"
android:layout_marginTop="50dp"
android:layout_marginRight="50dp"
android:gravity="center"
android:orientation="vertical">
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/txtProgress"
android:layout_centerHorizontal="true"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:progress="50"
android:progressTint="@android:color/black" />
<TextView
android:id="@+id/txtProgress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Progress"
android:textColor="@android:color/black" />
</LinearLayout>
Java
来源：https://stackoverflow.com/questions/20354380/spinner-does-not-show-selected-value