Java tutorial
/** * **************************************************************************** * Copyright 2011, 2012 Chris Banes. * <p/> * 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 * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * 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. * ***************************************************************************** */ package com.allandroidprojects.ecomsample.fragments; import android.app.Activity; import android.os.Build; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import com.allandroidprojects.ecomsample.R; import com.allandroidprojects.ecomsample.photoview.view.PhotoView; import com.allandroidprojects.ecomsample.utility.ImageUrlUtils; /** * Lock/Unlock button is added to the ActionBar. * Use it to temporarily disable ViewPager navigation in order to correctly interact with ImageView by gestures. * Lock/Unlock state of ViewPager is saved and restored on configuration changes. * * Julia Zudikova */ public class ViewPagerActivity extends Activity { private static final String ISLOCKED_ARG = "isLocked"; private ViewPager mViewPager; private int position; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_view_pager); mViewPager = (HackyViewPager) findViewById(R.id.view_pager); setContentView(mViewPager); mViewPager.setAdapter(new SamplePagerAdapter()); if (getIntent() != null) { position = getIntent().getIntExtra("position", 0); mViewPager.setCurrentItem(position); } if (savedInstanceState != null) { boolean isLocked = savedInstanceState.getBoolean(ISLOCKED_ARG, false); ((HackyViewPager) mViewPager).setLocked(isLocked); } if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return; getWindow().getDecorView() .setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); } static class SamplePagerAdapter extends PagerAdapter { /* Here I'm adding the demo pics, but you can add your Item related pics , just get your pics based on itemID (use asynctask) and fill the urls in arraylist*/ private static final String[] sDrawables = ImageUrlUtils.getImageUrls(); @Override public int getCount() { return sDrawables.length; } @Override public View instantiateItem(ViewGroup container, int position) { PhotoView photoView = new PhotoView(container.getContext()); photoView.setImageUri(sDrawables[position]); // Now just add PhotoView to ViewPager and return it container.addView(photoView, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); return photoView; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } @Override public boolean isViewFromObject(View view, Object object) { return view == object; } } private boolean isViewPagerActive() { return (mViewPager != null && mViewPager instanceof HackyViewPager); } @Override protected void onSaveInstanceState(@NonNull Bundle outState) { if (isViewPagerActive()) { outState.putBoolean(ISLOCKED_ARG, ((HackyViewPager) mViewPager).isLocked()); } super.onSaveInstanceState(outState); } }