android-arrayadapter

问题 I am very new to programming. I have an app that has several views. The Main view shows a list such as Breakfast, Lunch & Dinner. When a an item is selected, example Lunch, a list of lunch menu items is displayed such as Hamburger, Cheeseburger, French Fries... (this list is created from the string-array lunch_menu that is stored in \values\lunch.xml) as the user selects the items they want, it is stored in a new array called myNewList and is displayed whe the users presses the lunchList

问题 This is the ArrayList page that opens as a result page after update and save. I guess I would need to somehow refresh so that it reflects the changes on the UI. I've tried to call notifyDataSetChanged() but no luck with my level of experience. Could someone kindly show how to implement it please? @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.all_requests); requestsList = new ArrayList<HashMap<String, String>>(); new

问题 Unfortunately I couldn't implement a search functionality in a ListView inside an ArrayAdapter. Here is a part of my MainActivity: public class MainPageActivity extends ActionBarActivity implements View.OnClickListener { private static String TAG = "MainPageActivity"; private ListView lv_medicines; private MedicineAdapter medicineAdapter; private JSONParser jsonParser; private List<Medicine> medicines; private EditText inputSearch; @Override protected void onCreate(Bundle savedInstanceState)

问题 I have created a listview called popuplistfragment.java and list_view.xml.I have added textview in xml file but I dont know where to add code to change the textview in the listview. import android.app.ListFragment; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android

问题 I'm developing an app with a custom layout and an arrayAdapter : The problem is when I check one Box the app automatically check another 2 boxes ! I created a list where I put the positions of checkboxes and show that nothing its wrong! I think the problem is when I do the recycle ! Lets view some code; This is my ArrayAdapter: class VivzAdapter extends ArrayAdapter<String> implements OnCheckedChangeListener { Context context; int[] images; String[] titlesArray, descrptionArray; List<Integer>

问题 In my app I have a RelativeLayout->fragment(SupportMapFragment)|Relativelayout->AutoCompleteTextView The search should do what Google Maps' search bar should do and return a dropdown list of locations from my search keyword. After I finish typing and a few second delay, my app crashes with the error: 12-12 21:59:13.138 25010-25010/com.hudsoncorp.zahudson.roadtrip E/AndroidRuntime: FATAL EXCEPTION: main 12-12 21:59:13.138 25010-25010/com.hudsoncorp.zahudson.roadtrip E/AndroidRuntime: Process:

问题 I have a Product Class, Which has three fields:- id name price In my code I create a List<Product> productList = Collections.synchronizedList(new ArrayList<Product>()); This product list is used to create a ArrayAdapter<Product> adapter = ArrayAdapter<Product>() , I fill the productList in a separate thread and adapter is notified accordingly. It is working absolutely fine. Now, I want to change the color of the some specific products (say for price < 1000). Each row of ListView should

问题 I have an ArrayAdapter and while pressing on a button I want to: delete some data from my Array which is being held in MainActivity delete one line from txt file (FileManager handles deleting but i have to access a file which is private in MainActivity) How can I send this data? deleteDeckButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //i've done it with DECK_NAMES being static public in //MainActivity and i really dont like this solution

问题 Trying to get my custom Spinner with only an ImageView (to show a list of icon drawables) to work. I thought I had the custom adapter code correct, and the onCreateOptionsMenu() code correct, but no. The icon for the sharing feature shows in the ActionBar, but when I touch it, the Spinner does not dropdown the menu it should. What could be wrong? This goal is unique, because it is not just a custom spinner (easy to find tutorial on) or just an ActionBar icon placement (also easy), but rather

问题 I have a GridView , each cell of which I would like to populate with a list of names, and I need these lists to be dynamically changeable. I tried implementing this idea as follows: public void fillBoard(int groupSize){ int numGroups = listPresentMembers.size()/groupSize; ListView [] groups = new ListView [numGroups]; for(int i=0;i<numGroups;i++){ String [] items = new String[groupSize]; for(int j=0;j<groupSize;j++){ items[j] = listPresentMembers.get(i*groupSize + j); } ArrayAdapter<String>