Android编程实现GridView控件点击图片变暗效果的方法
程序员文章站
2023-11-29 19:21:04
本文实例讲述了android编程实现gridview控件点击图片变暗效果的方法。分享给大家供大家参考,具体如下:
@override
public void o...
本文实例讲述了android编程实现gridview控件点击图片变暗效果的方法。分享给大家供大家参考,具体如下:
@override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); grid = (gridview) findviewbyid(r.id.grid); grid.setadapter(new gridadapter()); grid.setonitemclicklistener(new onitemclicklistener() { @override public void onitemclick(adapterview<?> arg0, view arg1, int arg2, long arg3) { toast.maketext(mainactivity.this, "ddd", 1000).show(); } }); } class gridadapter extends baseadapter { @override public int getcount() { return imgs.length; } @override public object getitem(int arg0) { return arg0; } @override public long getitemid(int arg0) { return arg0; } @override public view getview(int arg0, view view, viewgroup arg2) { if (view == null) { holder = new viewholder(); view = layoutinflater.from(mainactivity.this).inflate( r.layout.imgs, null); holder.view = (imageview) view.findviewbyid(r.id.gridimg); view.settag(holder); } else { holder = (viewholder) view.gettag(); } holder.view.setimageresource(imgs[arg0]); holder.view.setontouchlistener(ontouchlistener); return view; } class viewholder { imageview view; } public ontouchlistener ontouchlistener = new view.ontouchlistener() { @override public boolean ontouch(view view, motionevent event) { switch (event.getaction()) { case motionevent.action_up: changelight((imageview) view, 0); // onclick break; case motionevent.action_down: changelight((imageview) view, -80); break; case motionevent.action_move: // changelight(view, 0); break; case motionevent.action_cancel: changelight((imageview) view, 0); break; default: break; } return true; } }; } private void changelight(imageview imageview, int brightness) { colormatrix matrix = new colormatrix(); matrix.set(new float[] { 1, 0, 0, 0, brightness, 0, 1, 0, 0, brightness, 0, 0, 1, 0, brightness, 0, 0, 0, 1, 0 }); imageview.setcolorfilter(new colormatrixcolorfilter(matrix)); }
更多关于android相关内容感兴趣的读者可查看本站专题:《android控件用法总结》、《android开发入门与进阶教程》、《android视图view技巧总结》、《android编程之activity操作技巧总结》、《android数据库操作技巧总结》及《android资源操作技巧汇总》
希望本文所述对大家android程序设计有所帮助。