android-spinner

问题 I am trying to create a spinner, the values of which I am populating from a resource xml, using ArrayAdapter. I also want to give the resource items some "id" or "value". How can i retrieve these values inside the onItemSelected() callback ? Here is the Java code. package com.waus.waus; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import

问题 I select the value from spinner and when I select the same value again then no action is performed on the click. 回答1: Use this custom Spinner class... /** Spinner extension that calls onItemSelected even when the selection is the same as its previous value */ public class NDSpinner extends Spinner { public NDSpinner(Context context) { super(context); } public NDSpinner(Context context, AttributeSet attrs) { super(context, attrs); } public NDSpinner(Context context, AttributeSet attrs, int

问题 findViewById() works fine when you need to find something any UI element that is in your layout. However, using the second option of this answer How to add a Dropdown item on the action bar, I added a Spinner to my ActionBar . Now the problem I am facing is how to retrieve a reference to this Spinner so that I can change the font that it uses. How do I do that? My menu/sort_spinner looks like this: <menu xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@+id/sort"

问题 I am trying to expand a Spinner when user click on another Button. as example : I have a Spinner with values and a 'OK' button when user click on 'ok' buttton without selecting any value from spinner, Spinner expands itself. Is this possible to get a event to expand spinner without user interaction on spinner. 回答1: Just call Spinner.performClick() to expand Spinner without user interaction... final Spinner spinner = (Spinner) findViewById(R.id.spinner); Button okButton = (Button) findViewById

问题 I want to catch an event when spinner drop down is dismissed. We can catch it when the user clicks on any item in the onItemSelected(). But I want to catch even when user touches outside of the drop down area or back button as these too make it disappear. In these two causes when I observed log, it says "Attempted to finish an input event, but the input event receiver has already been disposed" I observed the source code, this is printed from the InputEventReceiver.java in the

问题 I have a form with TextInputLayout+TextInputEditText and spinners. I want the spinner height wrap text but have large items in the dropdown. The problem is that the spinner's height depends on the dropdown items height (simple_spinner_dropdown_item). I set style="@style/Base.Widget.AppCompat.Spinner.Underlined" in order to add line below spinner. Any solution? 回答1: Spinner like edittext If you want spinner like edittext, it's like AutoCompleteTextView .You can custom your

问题 I am fetching the values from Database using JSON and inserting them into spinner. This process is running successfully. But I am receiving a Spinner hint two times, when I click on spinner; how can I remove the first default value from spinner... This is snapshot :- hope you understand my problem : This is my code:- private class GetCategories extends AsyncTask<Void, Void, Void> { protected void onPreExecute() { super.onPreExecute(); } @Override protected Void doInBackground(Void... arg0) {

问题 I want my spinner to be next to my menu in the toolbar (to the left of the menu), but currently the spinner appear below the menu. Do i have to add it somehow inside the onCreateOptionsMenu(Menu menu) My Activity: protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_list); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); getSupportActionBar().setDisplayShowTitleEnabled(false); Spinner

问题 Can I use android:spinnerMode xml attribute in Android 2.2? I need to get an inline dropdown anchored to the Spinner widget than getting in dialog window. 回答1: Jake Wharton, the author of ActionBarSherlock library, made possible to use IcsSpinner outside of action bar. Read through this discussion: https://groups.google.com/d/topic/actionbarsherlock/fL-JL6Mn7kg/discussion IcsSpinner allow to setup dropdown or dialog mode. 来源： https://stackoverflow.com/questions/11840636/how-to-set-spinnermode

问题 Can I use android:spinnerMode xml attribute in Android 2.2? I need to get an inline dropdown anchored to the Spinner widget than getting in dialog window. 回答1: Jake Wharton, the author of ActionBarSherlock library, made possible to use IcsSpinner outside of action bar. Read through this discussion: https://groups.google.com/d/topic/actionbarsherlock/fL-JL6Mn7kg/discussion IcsSpinner allow to setup dropdown or dialog mode. 来源： https://stackoverflow.com/questions/11840636/how-to-set-spinnermode