android - How to use two drawable background images in custom listview for a messaging app -
i'm developing kind of messaging app android. when messages loaded custom list view database, displayed ok. want them displayed native messaging app of android. have 2 images sender , receiver using 9patch. want display image http://s21.postimg.org/bj6idzdaf/example.png. i'm having http://s23.postimg.org/805pfdxqz/example1.png. here code of row:
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/chatlinearlayout" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/me" android:orientation="vertical" > <!-- user , createdat --> <linearlayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:paddingbottom="0dp" > <textview android:id="@+id/textuser" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="user" android:textsize="15sp" /> <textview android:id="@+id/textcreatedat" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="less minute" android:textsize="10sp" /> </linearlayout> <!-- message --> <textview android:id="@+id/texttext" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingtop="0dp" android:text="i'm text" android:textsize="12sp" /> </linearlayout> here code of layout:
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <listview android:id="@+id/listtimeline" android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1" android:divider="#ffffff" android:dividerheight="1dp" android:listselector="@drawable/list_selector" /> <linearlayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <edittext android:id="@+id/messagetext" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:ems="10" android:hint="@string/sendtextboxhint" /> <button android:id="@+id/buttonsend" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/buttonsend" /> </linearlayout> </linearlayout> here code of getting , displaying messages in list view
class getanddisplaymessages extends thread { @override public void run() { while (!stopcheckingformessages) { try { theapp.appdata.openreadabledatabase(); cursor = theapp.appdata.getmessages(user, theapplication.screenname); log.d(tag, "cursor containing " + cursor.getcount() + " rows"); if (cursor == null) { return; } startmanagingcursor(cursor); chatactivity.this.runonuithread(new runnable() { @suppresswarnings("deprecation") public void run() { string[] = { appdata.t_time, appdata.sender_screen_name, appdata.messages }; int[] = { r.id.textcreatedat, r.id.textuser, r.id.texttext }; adapter = new simplecursoradapter( chatactivity.this, r.layout.chat_row, cursor, from, to); adapter.setviewbinder(view_binder); listtimeline.setadapter(adapter); listtimeline.setselection(adapter.getcount()-1); } }); thread.sleep(delay); } catch (exception e) { log.e(tag, "error occured while checking updated messages. \nerrormessage:" + e.getmessage()); } } } }
you need create custom adaptor work:-
and inside getview method can insert different xml layout:-
listitemsender_layout.xml listitemreciever_layout.xml
public view getview(final int position, view convertview, viewgroup parent) { if(convertview == null) { layoutinflater vi = (layoutinflater) context .getsystemservice(context.layout_inflater_service); if(id == sender_id) { convertview = vi.inflate(r.layout.listitemsender_layout, null); }else { convertview = vi.inflate(r.layout.listitemreciever_layout, null); } } and can set different background image in these xml layout. other components similer in both of layouts.
thanks.
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