android - image viewer not remove dynamically at current position -
when click current delete image icon of image viewer delete other position image want delete particular position image delete of image viewer. if image size 3. found image position 1 2 2. again found position 2 0 0.
my activity :
public class onlyselectgridviewscreen extends baseactivity { public static onlyselectedfullimageadapter adapter; public static viewpager viewpager; private static final int take_photo_code = 0; private arraylist<string> imagepaths; private static final string tag = "onlyselectgridviewscreen"; private textview tvheader; private gridview gridview; private int columnwidth; string[] selectimages; private int imgposition = -1; private string locname, deptname, cusfoldername, realimagesdirectory; private imageview btndelete; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.full_image_screen); imagepaths = new arraylist<string>(); intent = getintent(); locname = i.getstringextra("locname"); deptname = i.getstringextra("deptname"); cusfoldername = i.getstringextra("cusfoldername"); realimagesdirectory = i.getstringextra("realimagesdirectory"); selectimages = i.getstringarrayextra("selectimages"); toast.maketext(getbasecontext(), tag+"\n selectimages size :"+selectimages.length, toast.length_long).show(); list<string> l = arrays.<string> aslist(selectimages); // if list<string> isn't specific enough: imagepaths = new arraylist<string>(l); tvheader = (textview) findviewbyid(r.id.tvheader); tvheader.settext("" + locname + " / " + deptname + " / " + cusfoldername); viewpager = (viewpager) findviewbyid(r.id.pager); int position = i.getintextra("position", 0); adapter = new onlyselectedfullimageadapter( onlyselectgridviewscreen.this, imagepaths, locname, deptname, cusfoldername, realimagesdirectory); if (imagepaths.size() > 0) { viewpager.clearfocus(); adapter.notifydatasetchanged(); } viewpager.setadapter(adapter); // displaying selected image first viewpager.setcurrentitem(position); btnback = (imageview) findviewbyid(r.id.backnow); btndelete = (imageview) findviewbyid(r.id.btndelete); // delete current image btndelete.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { file file = new file(imagepaths.get(imgposition)); boolean deleted = file.delete(); if (deleted) { toast.maketext(onlyselectgridviewscreen.this, "image delete successfully.", toast.length_long) .show(); imagepaths.remove(imgposition); // start of update part if (imagepaths.size() == 0) { toast.maketext( getbasecontext(), "not image found, add image or previous page.", toast.length_long).show(); } else { int position = 0; adapter = new onlyselectedfullimageadapter( onlyselectgridviewscreen.this, imagepaths, locname, deptname, cusfoldername, realimagesdirectory); adapter.notifydatasetchanged(); viewpager.clearfocus(); viewpager.setadapter(adapter); // displaying selected image first viewpager.setcurrentitem(position); // end of update part } } else { toast.maketext(onlyselectgridviewscreen.this, "sorry, image delete fails.", toast.length_long) .show(); } } }); } public class onlyselectedfullimageadapter extends pageradapter { private activity _activity; private arraylist<string> _imagepaths; private layoutinflater inflater; private string locname, deptname, foldername, realimagesdirectory; // constructor public onlyselectedfullimageadapter(activity activity, arraylist<string> imagepaths, string _mlocationname, string _mdeptname, string _mfoldername, string realimagesdirectory) { this._activity = activity; this._imagepaths = imagepaths; this.locname = _mlocationname; this.deptname = _mdeptname; this.foldername = _mfoldername; this.realimagesdirectory = realimagesdirectory; } @override public int getcount() { return this._imagepaths.size(); } @override public boolean isviewfromobject(view view, object object) { return view == ((relativelayout) object); } @override public object instantiateitem(viewgroup container, final int position) { touchimageview imgdisplay; imgposition = position; inflater = (layoutinflater) _activity .getsystemservice(context.layout_inflater_service); view viewlayout = inflater.inflate( r.layout.layout_fullscreen_image, container, false); imgdisplay = (touchimageview) viewlayout .findviewbyid(r.id.imgdisplay); // dimensions of view // int targetw = imgdisplay.getwidth(); // int targeth = imgdisplay.getheight(); int targetw = 100; int targeth = 100; // dimensions of bitmap bitmapfactory.options bmoptions = new bitmapfactory.options(); bmoptions.injustdecodebounds = true; bitmapfactory.decodefile(_imagepaths.get(position), bmoptions); int photow = bmoptions.outwidth; int photoh = bmoptions.outheight; // determine how scale down image int scalefactor = math.min(photow / targetw, photoh / targeth); // decode image file bitmap sized fill view bmoptions.injustdecodebounds = false; bmoptions.insamplesize = scalefactor; bmoptions.inpurgeable = true; bitmap bitmap = bitmapfactory.decodefile(_imagepaths.get(position), bmoptions); imgdisplay.setimagebitmap(bitmap); ((viewpager) container).addview(viewlayout); return viewlayout; } @override public void destroyitem(viewgroup container, int position, object object) { ((viewpager) container).removeview((relativelayout) object); } } } full_image_screen.xml file below:
<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <!-- header aligned top --> <include android:id="@+id/header" layout="@layout/header" > </include> <!-- footer aligned bottom --> <relativelayout android:id="@+id/footer" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:background="#0c95d4" android:gravity="center" > <linearlayout android:layout_width="match_parent" android:layout_height="50dp" android:gravity="center" > <imageview android:id="@+id/btndelete" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_weight="1" android:background="@drawable/img_selector" android:clickable="true" android:src="@drawable/delete_icon_black" /> </linearlayout> </relativelayout> <!-- content below header , above footer --> <relativelayout android:id="@+id/content" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_above="@id/footer" android:layout_below="@id/header" > <android.support.v4.view.viewpager android:id="@+id/pager" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </relativelayout> </relativelayout> and adapter layout_fullscreen_image.xml file beow:
<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <com.databizsoftware.cg.helpers.touchimageview android:id="@+id/imgdisplay" android:layout_width="fill_parent" android:layout_height="fill_parent" android:scaletype="fitcenter" /> </relativelayout> and header.xml file below :
<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="50dp" android:layout_alignparenttop="true" android:background="#fff" android:gravity="center" android:orientation="vertical" > <linearlayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:orientation="horizontal" android:weightsum="5" > <textview android:id="@+id/tvheader" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="4" android:paddingleft="8dp" android:text="fixed header" android:textcolor="#33b5e5" android:textsize="12sp" /> <imageview android:id="@+id/ihome" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:background="@drawable/img_selector" android:clickable="true" android:onclick="gotohome" android:visibility="visible" android:src="@drawable/home_black" /> <imageview android:id="@+id/ilogout" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="left" android:layout_weight="1" android:background="@drawable/img_selector" android:clickable="true" android:onclick="logoutaction" android:paddingright="8dp" android:src="@drawable/logout_black" /> </linearlayout> <linearlayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignparentbottom="true" > <view android:layout_width="match_parent" android:layout_height="3dip" android:background="#33b5e5" /> </linearlayout> </relativelayout> why not delete current position of image viewer. please me.
implement pagechangelistener , can achive this. viewpager.setonpagechangelistener(new onpagechangelistener(){ public void onpagescrollstatechanged(int arg) { } public void onpagescrolled(int arg0, float arg1, int arg2) { // todo auto-generated method stub } public void onpageselected(int position) { imgposition = position; } });
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