我正在创建一个包含一些联系信息的Android小部件
我发现getContentResolver()方法仅存在于Activity类中,而不存在于AppWidgetProvider类中。
如何从窗口小部件查询内容?
像这样:
游标人= getContentResolver()。query(SOME QUERY);
更新:
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
{
String people = getContacts(context);
// Do something with people...
}
private String getContacts(Context context)
{
String peopleStr = "";
String[] projection = new String[] { ContactsContract.Contacts._ID,ContactsContract.Contacts.DISPLAY_NAME };
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '" + ("1") + "'";
Cursor people = context.getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, projection, selection, null, sortOrder);
while(people.moveToNext())
{
int nameFieldColumnIndex = people.getColumnIndex(ContactsContract.Data.DISPLAY_NAME);
peopleStr += people.getString(nameFieldColumnIndex) + "\n";
}
people.close();
return peopleStr;
}
最佳答案
getContentResolver()实际上是在Context类中定义的。这意味着,可以通过appwidgetprovider.onupdate()和相关方法中传递的上下文进行调用。