Java tutorial
/*** Copyright (c) 2013-14 CommonsWare, LLC Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. Covered in detail in the book _The Busy Coder's Guide to Android Development_ https://commonsware.com/Android */ package com.commonsware.android.preso.decktastic; import android.content.Context; import android.net.Uri; import android.support.v4.view.PagerAdapter; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import com.squareup.picasso.Picasso; class SlidesAdapter extends PagerAdapter { private PresoContents preso; private Context ctxt; SlidesAdapter(Context ctxt, PresoContents preso) { this.ctxt = ctxt; this.preso = preso; } @Override public Object instantiateItem(ViewGroup container, int position) { ImageView page = new ImageView(ctxt); ViewGroup.LayoutParams p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); container.addView(page, p); Picasso.with(ctxt).load(getSlideImageUri(position)).into(page); return (page); } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } @Override public int getCount() { return (preso.slides.size()); } @Override public boolean isViewFromObject(View view, Object object) { return (view == object); } @Override public String getPageTitle(int position) { return (preso.getSlideTitle(position)); } Uri getSlideImageUri(int position) { return (Uri.parse("file:///android_asset/" + preso.getSlideImage(position))); } }