android-spinner

问题 I am developing an Android app. In my app, I am working with spinner view. But I am using spinner view with custom adapter because my spinner with will be more complicated soon. All the data for spinner come from server through volley. My spinner view with customer adapter is showing the data properly. But the problem is when I click the dropdown to choose item. It throws exception. This is my customer adapter for spinner view: public class SpinnerItemAdapter extends ArrayAdapter<NVItem> {

问题 <Spinner android:id="@+id/spinner1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@+id/editText2" android:layout_marginTop="22dp" android:entries="@array/categorylist" android:prompt="@string/category" /> i have created spinner in the above format! final Spinner spnr= (Spinner)findViewById(R.id.spinner1); String category=spnr.getSelectedItem().toString(); pushed the spinner values in db by getting value in

问题 I had this weird scenario where every time I select a value from the spinner in the ListView 's 1st Item , the last ListView's item its spinner value is the same as the first item . This will only happen when the total number of ListView items is 5 and above . I commented out the codes and retain just the declarations and it's still happening. Is this a bug in Android? Clarifications: My ListView's Scroll Listener is empty My spinner's setOnItemSelectedListener is commented out. Android SDK

问题 I want to show icon for spinner and on click open the list with highlighted selected position. here's my method for add item in spinner : public void addItemsOnSpinner() { try { List<String> list = new ArrayList<String>(); list.add("Top Stories"); list.add("Recent"); ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>( getActivity(), android.R.layout.simple_spinner_item, list); dataAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); sortspinner.setAdapter

问题 i am using spinner in my code which i had declare in my xml xml code for spinner:- <Spinner android:id="@+id/spinner" android:layout_width="180dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/button1" android:layout_marginTop="133dp" android:drawSelectorOnTop="true" /> so as can be seen that the spinner is down the one button which is also in that layout xml .Now when i run my app its loading all data correctly but the item is showing

问题 How can i change spinner background color ? this black color from style . How can i change style color for spinner pop up? I want to change background color white in place of black How can i change ? spinnner <Spinner android:id="@+id/spinner" android:layout_width="100dp" android:layout_marginTop="1dp" android:layout_height="wrap_content" android:background="@drawable/spinner_bg" android:layout_marginLeft="1dp"/> spinnerbg.xml <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android=

问题 I need to validate selected item of Spinner in Android . I tried the following code, but it's not working. if (Spinner1.getSelectedItem().toString().trim() == "Pick one") { Toast.makeText(CallWs.this, "Error", Toast.LENGTH_SHORT).show(); } What is wrong with the code, and how can i fix it? 回答1: Use .equals or .equalsIgnoreCase to compare two strings in java/android instead of == . Try this if (Spinner1.getSelectedItem().toString().trim().equals("Pick one")) { Toast.makeText(CallWs.this,

问题 There is an interesting issue I stumbled upon while working on an Android Honeycomb project. As you can see in the image below, while expanding a Spinner in a dialog, the navigation bar at the bottom overlaps it. Thus, the element at the bottom can not be selected. In order to fix this I tried using android:fitsSystemWindows="true" in the Spinner widget. It did not work. Also I noticed that we have an XML Attribute for dropdown width, android:dropDownWidth , but none for height. Here is the

问题 I want to change spinner look in android and I want it to be same for all the devices. I tried to do the same but failed to do so. If I use Tag, I am not able to customize it. I am adding screenshot of image of how I want. http://prntscr.com/gb3oh9 回答1: Try something like this: <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item> <layer-list> <item> <shape android:shape="rectangle"> <solid android:color="@color/white" /> <stroke android:width="2px" android:color="

问题 I created a spinner for my Fragment that populates it with data retrieved from an HTTP callout. When the Fragment is first created, I populate the spinner with its selection choices, set its setOnItemSelectedListener and set its initial selection in onCreateView(). stateSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { if (spinnerPosition != position) { spinnerPosition = position;