i have viewpager houses 4 frame layouts each different image background. have tried several ways of loading , resizing images viewpager still laggy when swipe; since has change background images accordingly.
other apps such quizup , of google's own apps have images on tutorial , they're smooth. there way achieve same effect; keep images backgrounds while optimizing viewpager's performance?
here viewpager adapter;
private class screenslidepageradapter extends pageradapter { context context; layoutinflater layoutinflater; public screenslidepageradapter(context context) { this.context = context; } @override public int getcount() { return num_pages; } @override public boolean isviewfromobject(view view, object object) { return view == object; } @override public object instantiateitem(viewgroup container, int position) { textview text1 = null, text2 = null, text3 = null, text4 = null; imageview background; button begin; layoutinflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service); view layout = null; switch (position) { case 0: layout = layoutinflater.inflate(r.layout.lifestyle, container, false); text1 = (textview) layout.findviewbyid(r.id.text3); text2 = (textview) layout.findviewbyid(r.id.text4); text3 = (textview) layout.findviewbyid(r.id.text5); background = (imageview) layout.findviewbyid(r.id.background); background.setimageresource(r.drawable.tlifestyle); break; case 1: layout = layoutinflater.inflate(r.layout.sports, container, false); text1 = (textview) layout.findviewbyid(r.id.text3); text2 = (textview) layout.findviewbyid(r.id.text4); text3 = (textview) layout.findviewbyid(r.id.text5); background = (imageview) layout.findviewbyid(r.id.background); background.setimageresource(r.drawable.tsports); break; case 2: layout = layoutinflater.inflate(r.layout.events, container, false); text1 = (textview) layout.findviewbyid(r.id.text1); text2 = (textview) layout.findviewbyid(r.id.text2); text3 = (textview) layout.findviewbyid(r.id.text3); text4 = (textview) layout.findviewbyid(r.id.text4); background = (imageview) layout.findviewbyid(r.id.background); background.setimageresource(r.drawable.tevents); break; case 3: layout = layoutinflater.inflate(r.layout.intro_to_categories, container, false); text1 = (textview) layout.findviewbyid(r.id.welcometext); text2 = (textview) layout.findviewbyid(r.id.findtext); text3 = (textview) layout.findviewbyid(r.id.dont_stress); text4 = (textview) layout.findviewbyid(r.id.dont_stress_2); begin = (button) layout.findviewbyid(r.id.begin); typeface typeface = typeface.createfromasset(getassets(), "mpashofont.otf"); begin.settypeface(typeface); begin.setonclicklistener(new view.onclicklistener() { @override public void onclick(view view) { startactivity(new intent(apptutorial.this, appsetup.class)); } }); break; } typeface typeface = typeface.createfromasset(getassets(), "mpashofont.otf"); assert text1 != null && text2 != null && text3 != null; text1.settypeface(typeface); text2.settypeface(typeface); text3.settypeface(typeface); if (text4 != null) { text4.settypeface(typeface); } container.addview(layout); return layout; } @override public void destroyitem(viewgroup container, int position, object object) { container.removeview((framelayout) object); } }
i guess per code of adapter can see have 3 textview , 1 background image different inflated layouts.
and creating typeface on each swipe place typeface initialization code in constructor
and better change data per position.
like
@override public object instantiateitem(viewgroup container, int position) { textview text1 = null, text2 = null, text3 = null, text4 = null; imageview background; view itemview = mlayoutinflater.inflate(r.layout.your_layout, container, false); text1 = (textview) layout.findviewbyid(r.id.text3); text2 = (textview) layout.findviewbyid(r.id.text4); text3 = (textview) layout.findviewbyid(r.id.text5); background = (imageview) layout.findviewbyid(r.id.background); text1.settext(arr[position]); ... } 
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