"Android Combat" Scrollview+gridview+viewpager implementation navigation page

According to the conventional thinking, the implementation of the navigation page has a special tabhost or Viewpager, but the custom space is not small, moreover, I want to familiarize yourself with the use of multiple layouts and animation effects, so this scrollview+gridview+viewpager effect.

One of the more troublesome is the GridView to achieve horizontal loading, and the following scroll bar with the sliding also has to scroll and dynamic location changes.

public class Mainact extends fragmentactivity {Viewpager viewpager; Horizontalscrollview ScrollView; String[] titles = {"Home", "News", "Friends", "shopping", "entertainment", "video", "reading", "Sports", "medical", "Food"}; Layoutparams textlayoutparams;private mygridview gridview;int[] tabmoving = new int[2]; View Downview;long dutime = 500;boolean right = True;int old = 0; @Overrideprotected void onCreate (Bundle savedinstancestat e) {//TODO auto-generated method Stubsuper.oncreate (savedinstancestate); Setcontentview (R.layout.scrollpager); Textlayoutparams = new Layoutparams (layoutparams.match_parent,layoutparams.match_parent); Textlayoutparams.setmargins (Ten, Ten, ten); Viewpager = (Viewpager) Findviewbyid (r.id.pager); ScrollView = ( Horizontalscrollview) Findviewbyid (r.id.myscroll); GridView = (MyGridView) Findviewbyid (r.id.gridview);d Ownview = ( View) Findviewbyid (R.id.down), final myadapter adapter = new Myadapter (); Pageradapter myadapter = new Pageradapter (Getsupportfragmentmanager ()); Viewpager.setadapter (myAdapter); int size = Titles. length;final displaymetrics dm = new Displaymetrics (); Getwindowmanager (). Getdefaultdisplay (). Getmetrics (DM); float  Density = dm.density;int allwidth = (int) (* (size) * density)-(titles.length) * 10;final int itemwidth = (int) (100 * density);d ownview.setlayoutparams (New Layoutparams (Itemwidth, 8)); Linearlayout.layoutparams params = new Linearlayout.layoutparams (allwidth, LinearLayout.LayoutParams.FILL_PARENT); Gridview.setlayoutparams (params); Gridview.setcolumnwidth (itemwidth); gridview.sethorizontalspacing (10); Gridview.setstretchmode (Gridview.no_stretch); gridview.setnumcolumns (size); Gridview.setadapter (adapter); Viewpager.setcurrentitem (0); Gridview.getparent (). Requestdisallowintercepttouchevent (True); Viewpager.setonpagechangelistener (New Onpagechangelistener () {@Overridepublic void onpageselected (int arg0) {//TODO Auto-generated method Stubview view = Gridview.getchildat (arg0), if (view = = null) Return;view.getlocationonscreen ( tabmoving), if (old <= tabmoving[0]) {right = true;}else {right = false;} Old = Tabmoving[0];int Difvalue = dm.widthpixels-tabmoving[0]-itemwidth;if (Difvalue < 0) {Scrollview.scrollby (Math . ABS (Difvalue), 0); Translateanimation tt = new Translateanimation (dm.widthpixels-2 * itemWidth-10, dm.widthpixels-itemwidth, 0, 0); tt.se Tduration (Dutime); Tt.setfillafter (True);d ownview.startanimation (TT);} else if (Tabmoving[0] < 0) {Scrollview.scrollby (tabmoving[0], 0); Translateanimation tt = new Translateanimation (itemwidth + ten, 0, 0, 0); Tt.setduration (dutime); Tt.setfillafter (true); Downview.startanimation (TT); gridview.setselection (arg0); adapter.notifydatasetchanged ();} else {if (right) {translateanimation TT = new Translateanimation (tabmoving[0]-itemWidth-10, tabmoving[0], 0,0); tt.setd Uration (Dutime); Tt.setfillafter (True);d ownview.startanimation (TT);} else {translateanimation tt = new Translateanimation (tabmoving[0], tabmoving[0]-itemWidth-10, 0,0); Tt.setduration (dut IME); Tt.setfillafter (True);d ownview.startanimation (TT);}}} @Overridepublic void onpagescrolled (int arg0, float arg1, int arg2) {//TODO auto-generated method stub} @Overridepublic void O npagescrollstatechanged (int arg0) {//TODO auto-generated Method stub}}); Class Pageradapter extends Fragmentstatepageradapter {fragment[] fs = {new Myfragment (Titles[0]), New Myfragment (titles[ 1]), new Myfragment (Titles[2]), new Myfragment (Titles[3]), new Myfragment (Titles[4]), new Myfragment (Titles[5]), new Myfragment (Titles[6]), new Myfragment (Titles[7]), new Myfragment (Titles[8]), new Myfragment (Titles[9])};p ublic Pageradapter (Fragmentmanager FM) {super (FM);//TODO auto-generated constructor stub} @Overridepublic Fragment GetItem ( int arg0) {//TODO auto-generated method Stubreturn fs[arg0];} @Overridepublic int GetCount () {//TODO auto-generated method Stubreturn fs.length;}} Class Myadapter extends Baseadapter {@Overridepublic int getcount () {//TODO auto-generated method Stubreturn Titles.lengt H;} @Overridepublic Object getItem (int position) {//TODO auto-generatedMethod Stubreturn titles[position];} @Overridepublic long Getitemid (int position) {//TODO auto-generated method Stubreturn position;}  @Overridepublic view GetView (int position, view Convertview, ViewGroup parent) {//TODO auto-generated method Stubtextview TextView = new TextView (Getapplicationcontext ()); Textview.settext (titles[position]);//Textview.setwidth (240);// Textview.setheight (+); textview.setgravity (Gravity.center); Textview.settextcolor (Color.Black); Textview.setbackgroundresource (R.DRAWABLE.S); Textview.setpadding ((a);//Textview.setlayoutparams ( Textlayoutparams); return TextView;}}}

"Android Combat" Scrollview+gridview+viewpager implementation navigation page