android-arrayadapter

问题 Edit: I removed my exception information. With the Help of @Sam I was able to use fix project properties and the application no longer force closes on me. Though, rearranging the layout from image textview to textview image causes it to not display images. Does anyone have any idea why? All code can be found here http://www.ezzylearning.com/tutorial.aspx?tid=1763429 I am attempting to follow this tutorial http://www.ezzylearning.com/tutorial.aspx?tid=1763429 I have everything working as

问题 I have a listview with an arrayadapter. I want to refresh the adapter when I entirely fill in my array of items and only at this time. I know that notifyDataSetChanged() will be automatically called after methods such as add, addAll, remove, insert or clear but I think there might be a bug in my case. Here is a simple snippet of code that should work. I mean in this case the adapter should not notify its ListView and content sould not be displayed (but content is displayed on my device).

问题 I have a list that gets refreshed every 2 seconds via the Handler postDelayed() method. Every 2 seconds an AsyncTask is run that makes an HTTP GET request, turns the JSON into a list of objects, then sets the ListAdapter: MyListAdapter adapter = new MyListAdapter(someObjects); setListAdapter(adapter); My problem is that every time the task completes (so, roughly every two seconds) my list jumps back to the top, even if I have scrolled down to the middle or bottom of the list. This would be

问题 I have a ArrayAdapter that gathers information from an AsyncTask. The AsyncTask is triggered by an on scroll listener. When the user scrolls to the bottom of the content the AsyncTask is triggered and loads more content. The problem is I have implemented a reset button. What this does is clears the ArrayAdapter and resets the tokens that are sent through JSON to a php script that gathers the information. The reset button doesn't work at all. When I call clear() it sometimes clears the list

问题 I am new to Kotlin for Android development. While following along a tutorial project, I needed to use ArrayAdapter with a custom class. Building the project failed with error. The MainActivity.kt class throwing the error: class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) } val dm = DataManager() val adapterCourses = ArrayAdapter<CourseInfo>(

问题 I am new to Kotlin for Android development. While following along a tutorial project, I needed to use ArrayAdapter with a custom class. Building the project failed with error. The MainActivity.kt class throwing the error: class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar) } val dm = DataManager() val adapterCourses = ArrayAdapter<CourseInfo>(

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 am using two ListView in same screen,Because of using two Listviews likely Parent ListView and Child ListView ,that Child ListView Adapter class doesn't show all List Values in Child ListView.It showed only 0 th(first) position in Child ListView,for this above issue I have used the answer code from this Android list view inside a scroll view link.now I can see all list values in my Child ListView but It is not showing all my List values in same time which I had grabbed from Web service call

问题 I am using GridView in my Android project, which is having auto_fit properties set for numColumns (with columnWidth set to 48dp). I wanted to know numColumns value before setting up adapter, so I can setup values size. but If I call it inside onCreateView is gives as -1 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); int numColumns = gv.getNumColumns(); if

问题 Here is my code that is having problems. I am trying to update my sqlite database data in ListView after entering an event, but the ListView is not showing, and I am bad in using fragment, can anyone guide me to what I am doing wrong here? Sorry I am new to android apps development. Thank you. public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.event, container, false); show = (Button)rootView