android-listview

问题 ListView listView; Activity activity; public ArrayList<Tasks> tasks; View v; public TaskAdapter(Activity activity, ArrayList<Tasks> tasks) { super(activity, R.layout.presenterlayout, tasks); this.activity = activity; this.tasks = tasks; } static class ViewHolder { public TextView taskTitleTextView; public TextView taskDescriptionTextView; public TextView taskDueTimeTextView; public CheckBox checkBox; } public View getView(final int position, View convertView, ViewGroup parent) { final

问题 For some reason, I can't get text to show up in my list view. When I run the following example, two blank list elements appear with no text. Also, the debugging output shows that the value of the text in the TextView is correct. Here is my main activity: import java.util.ArrayList; import android.app.ListActivity; import android.content.Context; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup;

问题 I am creating a listview as ListView listView = new ListView(context); in my activity and I code MyCustomAdapter that extends BaseAdaptor.setting this custom adapter to my listView.setAdapter(myCustomAdpObj) object that I created as above.Now at run time I want to add/remove elements from this listView.I did't find the method how I can do this?any suggestion?thanks 回答1: remove/add an element and use this. ((BaseAdapter) listView.getAdapter()).notifyDataSetInvalidated(); 回答2: from your item

问题 I have the following code for my listview with a header: The LinearLayout contains all my header and the rest is my listview: <LinearLayout android:id="@+id/cabecalho_tabela_listar_salas" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginTop="35dp" android:orientation="horizontal" android:background="@drawable/red_header" android:layout_below="@+id/botaoCriarNovaSala" > <TextView android:id="@+id/label_titulo_username" android:layout_width="0px"

问题 I want to cheange the color of the background of a ListItem based on some property of the current member of the cursor. I'm using SimpleCursorAdapter to bind the values of the database to the ListView. What I did is to create a color selector like this: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_activated="true" android:drawable="@android:color/holo_blue_dark" /> <item android:state_activated="true" android

问题 From the Android development page we have the following quote for Custom ArrayAdapter of ListViews: "there is absolutely no guarantee on the order in which getView() will be called nor how many times." When I have the following and getView is called a few times, it's no problem, since I'm just recycling the Views instead of inflating them again: @Override public void getView(int position, View convertView, ViewGroup parent){ Log.i(TAG, "getView of position " + String.valueOf(position) + " is

问题 I need to build a contact picker which list all phone's contact except an account type of contact. I did follow this way : Example the account type I want to remove from the list is : group = "com.account.myaccount" First I query all the group id have the account type : public String[] getGroupIds(Context context, String group){ final Cursor groupCursor = context.getContentResolver().query( GroupWrap.CONTENT_URI, GroupWrap.PROJECTION, GroupWrap.SELECTION_GROUP_ID, new String[]{group}, null);

问题 I have a ListView and ArrayAdapter set on it. My ListView single row contains TextView and start Button. When click on button the TextView text will be changed every millisecond. I have defined timer for it but when I change TextView text it doesn't appears on my view. It changes only when I call notifyDataSetChanged. But in this case calling notifyDataSetChanged every millisecond, my ListView is crashed. How can I solve this problem? In addition to I want to say that I implemented

问题 I am using ListView in CheckBox in Android. It is working fine. Now, I want to set Selected Value in CheckBox based on Parameter. So on the loading of the list, if Parameter User is Yes then check that Checkbox else does not check. Here, in below code based on country.getUser(), I want to check CheckBox . Source : ListView CheckBox in Android My Code : private class MyCustomAdapter extends ArrayAdapter<country> { private ArrayList<country> countryList; public MyCustomAdapter(Context context,

问题 I am trying to insert images from the drawable folder to ImageView on custom listview. But when i set the images on satisfying the condition its giving the following warnings from getView. 12-27 11:56:56.356: DEBUG/skia(341): ---- read threw an exception 12-27 11:56:56.366: WARN/System.err(341): java.io.IOException: Is a directory 12-27 11:56:56.366: WARN/System.err(341): at org.apache.harmony.luni.platform.OSFileSystem.read(Native Method) 12-27 11:56:56.366: WARN/System.err(341): at dalvik