convertview | 易学教程

How to inflate one layout to another layout with string search

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问题 How to bold both xml string from search string with switch case.and i want to change each xml string textview and this change will be on button click String strfistsearch= mylist.get(7).get("data4"); if(strfistsearch.equals(strfistsearch)) { mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); View convertView1 = mInflater.inflate(R.layout.first_screen,viewFlow); TextView txtf = (TextView)convertView1.findViewById(R.id.textView11); String strfistsearch= mylist.get(7

convertView is being passed as null even if the view exists

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问题 I have developed an android application where image and text are displayed in a grid view and when the user scrolls down next ten items(image and text) are displayed. The problem arises when the getView method of adapter is called after adapter.notifyDataSetChanged() call. The adapter recycles the data but positions are rearranged and repeated in grid view. I hadn't faced this problem till I added the condition to check if convertView is null. Activity class : public class

convertView is being passed as null even if the view exists

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Why is Android recycling the wrong view type in my SpinnerAdapter?

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问题 I'm trying to make an ActionBar spinner that has separators. I have implemented a SpinnerAdapter that has 2 item view types (thanks to getViewTypeCount ). The problem is that I'm being sent some convertViews from the other type. Here's my SpinnerAdapter: public abstract class SeparatorSpinnerAdapter implements SpinnerAdapter { Context mContext; List<Object> mData; int mSeparatorLayoutResId, mActionBarItemLayoutResId, mDropDownItemLayoutResId, mTextViewResId; public static class

Why does ExpandableListView change ChildView settings (Android)?

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问题 I have a question to using the ExpandableListView. In my case I have two group- and two child views while the child views consist of a RelativeLayout with several Buttons, TextViews etc. in it. When expanding the second group first for instance and making some changes to the view holders and expanding the first group afterwards the previously made changes are automatically applied to the child view of the first group as well, why is this happening? I logged when the views are called: //

How do I implement view recycling mechanism for PagerAdapter?

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问题 I have a pager adapter that suppose to inflate a complex view representing a calendar. It takes around ~350 ms to inflate each year of the calendar. To improve performance I would like to implement the same mechanism that exists in the ListView array adapter of recycling views ( convertView parameter in getView() ). Here is my current getView() from the adapter. @Override protected View getView(VerticalViewPager pager, final DateTileGrid currentDataItem, int position) { mInflater =

Why view return null in android [duplicate]

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问题 This question already has answers here : What is a NullPointerException, and how do I fix it? (12 answers) Closed 3 years ago . I have 3 activity that display listview and it has an image to display icon and textview to display data. I want to make an adapter that can use general for my listview on these activity. But when I run my app, the logcat show me null pointer exception. 08-25 22:43:04.090 28942-28942/com.example.xiaoking.dilibus A/art: art/runtime/thread.cc:1113] Throwing new

Can't get parent position from convert view

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问题 I have a listView that currently displays the names of images along with a thumb of the image beside it. I highlight the selected textBox green onClick, but while scrolling through the list other items are highlighted as well. ADAPTER: public class CustomListAdapter extends BaseAdapter { private ArrayList<String> data; private Boolean[] isSelected; private Activity activity; private static LayoutInflater inflater=null; public ImageLoader imageLoader; View vi; public CustomListAdapter(Activity

Nullpointer Exception by FindViewById in Android

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问题 Hey guys today I started to develop my own little alarmclock app. But now I've got a problem, and I'm searching for three hours and couldn't solve it. When I try to implement a listview with a custom design for each row, i get a NullPointerException, when I try to set the text from a textview in the layout. The reason for this exception is, that the findViewById-Call returns null and not the TextView I want to have. On my search I found these two posts, but unfortunately they didn't help very

Nullpointer Exception by FindViewById in Android

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Hey guys today I started to develop my own little alarmclock app. But now I've got a problem, and I'm searching for three hours and couldn't solve it. When I try to implement a listview with a custom design for each row, i get a NullPointerException, when I try to set the text from a textview in the layout. The reason for this exception is, that the findViewById-Call returns null and not the TextView I want to have. On my search I found these two posts, but unfortunately they didn't help very well... Post1 - Stackoverflow Post2 - Stackoverflow I'm using the same basic structure as in the two