adapter | 易学教程

OnItemClickListener doesn't work with ListView item containing button

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问题 I have ListView with custom Adapter which supplies View to ListView in this way: public View getView(int position, View convertView, ViewGroup parent) { RelativeLayout.LayoutParams lineParams; RelativeLayout line=new RelativeLayout(context); TextView tv=new TextView(context); tv.setText("Text in postion="+i); lineParams=new RelativeLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); lineParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT); line

AlphabetIndexer with Custom Adapter managed by LoaderManager

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I am trying to implement AlphabetIndexer with Custom Adapter like this AlphabetIndexer with Custom Adapter My class ContactsCursorAdapter extends SimpleCursorAdapter and implements SectionIndexer and I am using a LoaderManager to manage my adapter's cursor so i have overridden the swapCursor() method like the second answer to the example above indicates. public class ContactsCursorAdapter extends SimpleCursorAdapter implements SectionIndexer{ private LayoutInflater mInflater; private Context mContext; private AlphabetIndexer mAlphaIndexer; public ContactsCursorAdapter(Context context, int

android attaching multiple adapters to one adapter

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问题 I have been using the SeparatedListAdapter which is very well known and works perfectly, but it seems that I cannot use the addSection() to add a SimpleAdapter, because the application is terminated. I\'m providing some code to show you what I\'m trying to do and get some guidance in order solve this issue. Please let me know if you need any other piece of code or anything: // Declarations private SimpleAdapter _resultsAdapter; private ArrayAdapter<String> _adapter; private List<Map<String,?>

Filtering ListView with custom (object) adapter

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I'm trying to implement filtering of a ListView which is uses a custom object adapter, but I can't find any useful samples. The included code is very simplified, so no- keep in mind I can't use an regular ArrayAdapter. I have a EditText above the ListView, and when the user enters text in the EditText widget I would like to filter the ListView by the text written in the EditText. Any suggestions would be much appreciated! Here is the snippet from the activity class: public class management_objects extends Activity { private static List<User> UserList; private EfficientAdapter adapter = null;

Call Activity method from adapter

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Is it possible to call method that is defined in Activity from ListAdapter ? (I want to make a Button in list's row and when this button is clicked, it should perform the method, that is defined in corresponding Activity. I tried to set onClickListener in my ListAdapter but I don't know how to call this method, what's its path...) when I used Activity.this.method() I get the following error: No enclosing instance of the type Activity is accessible in scope Any Idea ? Eldhose M Babu Yes you can. In the adapter Add a new Field : private Context mContext; In the adapter Constructor add the

ListView Viewholder checkbox state

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问题 I\'ve some problems with my ListView custom adapter (and its newly implemented viewHolder). I have a ListView with a checkbox for each item (nothing new here). The problem is, if there is more than 9 items in my list, when I check the first checkbox, the tenth will be automatically checked (same for the second with the eleventh) just like if there were one listener for both item (and I beleive it\'s the case in some way). I read about the position issue with listView, view recycling and the

What's the purpose of item-id's in Android ListView Adapter?

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问题 (Not specific to ListView, but to Adapter). I keep implementing this when I subclass BaseAdapter: @Override public long getItemId(int position) { return position; } Because have to implement that. I don\'t see any use of it, I need getItem(position) only, not getItemId(position). I wonder if it has any significance (to Android SDK or something else)? 回答1: There are probably many reasons to have stable item IDs. A default implementation cannot be given since it depends on the type of Object

How to start Activity in adapter?

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问题 I have a ListActivity with my customized adapter and inside each of the view, it may have some buttons, in which I need to implement OnClickListener . I need to implement the OnClickListener in the adapter. However, I don\'t know how to call the function like startActivity() or setResult() . Since the adapter doesn\'t extend to Activity. So what is the best way to solve this problem? Thanks. 回答1: Just pass in the current Context to the Adapter constructor and store it as a field. Then inside

ArrayIndexOutOfBoundsException with custom Android Adapter for multiple views in ListView

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问题 I am attempting to create a custom Adapter for my ListView since each item in the list can have a different view (a link, toggle, or radio group), but when I try to run the Activity that uses the ListView I receive an error and the app stops. The application is targeted for the Android 1.6 platform. The code: public class MenuListAdapter extends BaseAdapter { private static final String LOG_KEY = MenuListAdapter.class.getSimpleName(); protected List<MenuItem> list; protected Context ctx;

How to show installed app list in a listview without Checkbox getting unchecked when listview is scrolled?

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问题 My goal is to display the list of installed apps in a custom listview (within an Activity ) without checkbox getting unchecked (when listview is scrolled). The Problem : When Listview is scrolled, the checked status of the checkbox becomes unchecked. My Progress So Far : While this blog entry clearly shows how to get rid of the problem of checkboxes in listview getting unchecked, the difference is that it uses Model as the custom class whereas in my case it is a system class [i.e. the