I'm trying to create an app where I can swipe through photos. I currently have the images saved as bitmaps. How can I use ViewPager to swipe through the images? (Preferably without Picasso or Glide)
You said you have the bitmaps, store it in arraylist. First, make an Adapter for your ViewPager.
public class AdapterPagerImageSlider extends PagerAdapter {
private ArrayList<Bitmap> bitmaps;
private Context context;
private LayoutInflater layoutInflater;
public AdapterPagerImageSlider(Context context, ArrayList<Bitmap> bitmaps) {
this.context = context;
this.bitmaps= bitmaps;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.inflater_imageslider, container, false);
ImageView imageView = view.findViewById(R.id.image);
imageView.setImageBitmap(bitmaps.get(position)); //this set image from bitmap
container.addView(view);
return view;
}
#Override
public int getCount() {
return bitmaps.size();
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((LinearLayout) object);
}
#Override
public boolean isViewFromObject(#NonNull View view, #NonNull Object o) {
return (view == o);
}
}
Then, make a layout and name it inflater_imageslider
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
Last, declare that adapter and set it to your ViewPager.
ArrayList<Bitmap> bitmaps = new ArrayList<>();
//code of storing your bitmaps to arraylist here : bitmaps.add(yourbitmap);
ViewPager vp = findViewById(R.id.vp);
AdapterPagerImageSlider adapter = new AdapterPagerImageSlider(MainActivity.this, bitmaps);
vp.setAdapter(adapter);
Hope it helps.
Related
I am using ViewPager to load images from server.When it is swiped the first image is shown again and again.I checked the urls in the browser and it shows different images.I then tried loading images from drawable.Here the last image is being loaded repeatedly.Below is the complete code:
ImagePagerAdapter.java:
public class ImagePagerAdapter extends PagerAdapter {
TaxiDisplayData taxiDisplayData;
LinearLayout pager_lyt;
ImageView imageView;
LayoutInflater layoutInflater;
Context context;
String category;
int count;
LinearLayout linearLayout;
View view;
ImageLoaderConfiguration config;
ArrayList images;
public ImagePagerAdapter(Context context,String ctgry){
Log.e("I","T");
config = new ImageLoaderConfiguration.Builder(context).build();
ImageLoader.getInstance().init(config);
images =new ArrayList();
this.context=context;
this.category=ctgry;
if (category.equalsIgnoreCase("taxi")){
count= taxiDisplayData.getInstance().imagecount();
}
layoutInflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
Log.e("Count",Integer.toString(count));
return count;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
view=layoutInflater.inflate(R.layout.srch_dsply_pager,container,false);
linearLayout=(LinearLayout) view.findViewById(R.id.pgr_lyt);
imageView=(ImageView) view.findViewById(R.id.image1);
if (category.equalsIgnoreCase("taxi"))
{ images =taxiDisplayData.getInstance().getArrayList();
if(count!=0){
Iterator iterator= images.iterator();
while (iterator.hasNext())
{
Log.e("I","Z");
Picasso.with(context).load("http://example.com/xxxx/"+(String) iterator.next())
.placeholder(R.drawable.doctors)
.fit().into(imageView);
}
}}
container.addView(view);
return view;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View)object);
}
#Override
public boolean isViewFromObject(View view, Object object) {
Log.e("I","f");
return view==object;
}}
srch_dsply_pager.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/pgr_lyt">
<ImageView
android:layout_width="match_parent"
android:layout_height="#dimen/prsnl_img_dimen"
android:id="#+id/image1"
android:scaleType="fitXY"
/>
</LinearLayout>
instantiateItem() Creates one view and adds it in the view pager. In your source you are iterating trough the whole array, load only the last one and return the view. Instead the while you should have something like
String url = images.get(position);
Picasso.load(url).into(imageview);
I have a viewPager that implemented for viewing credit cards. In this viewPager placed a imageView with TextViews to have the card image and attributes. I had not yet aware that credit card design git (https://github.com/sharish/CreditCardView) and started to use it. But when I try to set the attributes, it falls into default and not the arrow attributes. (It worked normally with the text view). I'm using a list of the cards, he constroe view the pager with the amount of cards I have but not to set the values (all created cards are equal), that is, it esa not putting it on the list. Am I doing right?
PagerView.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_below="#+id/pager"
android:layout_centerHorizontal="true"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
>
<com.cooltechworks.creditcarddesign.CreditCardView
android:id="#+id/card_5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:card_expiration="01/17"
/>
</RelativeLayout>
AdapterCard.java
public class AdapterCards extends android.support.v4.view.PagerAdapter {
Context context;
private List<Card> listCards = new ArrayList<>();
public AdapterCards(Context context, List<Card> listCards){
this.context = context;
this.listCards = listCards;
}
#Override
public int getCount() {
return listCards.size();
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view==object;
}
#Override
public Object instantiateItem(ViewGroup container, int position){
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = layoutInflater.inflate(R.layout.pagecards, container, false);
CreditCardView creditCardView = new CreditCardView(context);
creditCardView.setCardExpiry(listCards.get(position).cardValid);
container.addView(itemView);
return itemView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object view){
container.removeView((View)view);
}
}
I'm trying to make an image pager and it looks like I've done it correct according to all the tutorials that I've looked up, but all I get is a blank screen. A breakpoint on the adapter's instantiateItem method tells me that it is being called and all the right information is getting set into the views, and swiping even works, but I still don't see anything. Here is my code
activity_photos.xml
<RelativeLayout> // I'm not including that code, irrelevant.
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imagePager"
android:background="#android:color/black"/>
</RelativeLayout>
viewpager_itemx.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:id="#+id/imageView"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/imageLabel"
android:textColor="#android:color/white"/>
</LinearLayout>
PhotosActivity.java
final String[] images = getResources().getStringArray(R.array.tips_images);
final String[] labels = getResources().getStringArray(R.array.tips_text);
final ViewPager viewPager = (ViewPager) findViewById(R.id.imagePager);
final ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(PhotoTipsActivity.this, images, labels);
viewPager.setAdapter(viewPagerAdapter);
and finally, ViewPagerAdapter.java
public class ViewPagerAdapter extends PagerAdapter {
private Context context;
private String[] images;
private String[] labels;
public ViewPagerAdapter(Context context, String[] images, String[] labels) {
this.context = context;
this.images = images;
this.labels = labels;
}
#Override
public int getCount() {
return images.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
final View itemView = LayoutInflater.from(context).inflate(R.layout.viewpager_item, container, false);
final ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView);
final TextView imageLabel = (TextView) itemView.findViewById(R.id.imageLabel);
// Get drawable image.
final int imageId = context.getResources().getIdentifier(images[position], "drawable", context.getPackageName());
imageView.setImageResource(imageId);
imageLabel.setText(labels[position]);
return itemView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(((LinearLayout) object));
}
}
Any blatantly obvious reason why I'm not seeing my images?
The same way destroyItem() needs to remove the view from the container, instantiateItem() needs to add the view to the container.
Just add
container.addView(itemView);
before returning from instantiateItem() and you'll be in business.
I asked very similar question in the morning but after trying something viewpager is not loading the expected images. This is my updated code:
layout_view_pager_item
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="#000000"
android:padding="1dp" />
</LinearLayout>
layout_data_listing_food
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="#style/Base.TextAppearance.AppCompat.Menu"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
.....
android:focusable="true" />
<android.support.v4.view.ViewPager
android:id="#+id/pager"
....
android:layout_alignStart="#id/profilePic" />
FoodListAdapter
public class FoodListAdapter extends ArrayAdapter<Food> {
private Context context;
private List<Food> roomList;
private ViewPager viewPager;
ArrayList<Integer> itemsimg = new ArrayList<Integer>();
public FoodListAdapter(Context context, int resource, List<Food> objects) {
super(context, resource, objects);
this.context = context;
this.roomList = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
itemsimg.add(R.drawable.temp_envelope);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (null == convertView) {
convertView = inflater.inflate(R.layout.layout_data_listing_food, parent, false);
}
ViewPageAdapter slider = new ViewPageAdapter(context,itemsimg);
ViewPager vpPager = (ViewPager) convertView.findViewById(R.id.pager);
vpPager.setAdapter(slider);
return convertView;
}
}
ViewPagerAdapter
public class ViewPageAdapter extends PagerAdapter {
private ArrayList<Integer> pagerItems;
private LayoutInflater inflater;
private Context context;
private FragmentManager fragmentManager;
public ViewPageAdapter(Context context, ArrayList<Integer> pagerItems) {
super();
this.pagerItems = pagerItems;
this.context = context;
inflater = LayoutInflater.from(context);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
try {
View imageLayout = inflater.inflate(R.layout.layout_view_pager_item, container, false);
final ImageView imageView = (ImageView) imageLayout
.findViewById(R.id.image);
imageView.setImageResource(pagerItems.get(position));
container.addView(imageLayout, 0);
return imageLayout;
}catch (Exception ex){
ex.printStackTrace();
return null;
}
}
#Override
public int getCount() {
return pagerItems.size();
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((View) object);
}
}
Expectation
List view should have to show viewpager data in each row (Right now I hardcoded the viewpager data)
Each row will contain Viewpager and TextView as we can see in layout_data_listing_food ViewPager ImageView just after the TextView
What I am doing wrong here? When I debug the code there was not Error :(
and data is also passing from one class to another. Any help would be appreciable
Problem
I can't see the Image loading through Viewpager but I can see the TextView content in layout file
Layout of the row of list view:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent" android:id="#+id/linearLayout_template3">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/template3_textView"/>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="200dp"
android:orientation ="horizontal" />
</LinearLayout>
ListView Adapter:
Here I am using Holder class to save the Tag information of convertView.
and also giving a unique ID to viewPager.I basically intend to show Images in ViewPager but to test the code I am working with TextViews.
public class ListViewAdapter extends ArrayAdapter<ParsedItems> {
LinearLayout mainLinnerLayout;
ViewPagerAdapter pagerAdapter;
Context context;
ArrayList<ParsedItems> mObject;
ViewPagerAdapter adapter;
private ProgressDialog progressDialog;
public ListViewAdapter(Context context,int resource, ArrayList<ParsedItems> objects) {
super(context,resource,objects);
this.context = context;
this.mObject = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
Holder holder=null;
ParsedItems items = mObject.get(position);
String template = items.getTemplate();
ParsedItemsImage mInnerItem;
ArrayList<ParsedItemsImage> mInnerItems = items.getItems();
LinearLayout innerLinearLayout=null;
if((Holder)convertView.getTag() == null){
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row_layout_template3, parent,false);
ViewPager viewPager = (ViewPager)convertView.findViewById(R.id.pager);
holder = new Holder();
holder.viewPager = viewPager;
holder.viewPager.setId(NotificationID.getID());
holder.textView = (TextView)convertView.findViewById(R.id.template3_textView);
convertView.setTag(holder);}
else
{
holder = (Holder)convertView.getTag();
}
holder.textView.setText("oyi!");
pagerAdapter = new ViewPagerAdapter(mInnerItems,context,convertView);
holder.viewPager.setAdapter(pagerAdapter);
return convertView;
}
class Holder
{
TextView textView;
ViewPager viewPager;
}
}
ViewPagerAdapter class:
public class ViewPagerAdapter extends PagerAdapter {
ArrayList<ParsedItemsImage> mInnerItems;
Context context;
private final WeakReference<View> ref;
public ViewPagerAdapter(ArrayList<ParsedItemsImage> items,Context context, View view)
{
mInnerItems = new ArrayList<ParsedItemsImage>(items);
this.context = context;
ref = new WeakReference<View>(view);
}
#Override
public int getCount() {
//return mInnerItems.size();
return 6;
}
#Override
public boolean isViewFromObject(View view, Object o) {
return false;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
View collection;
ParsedItemsImage mParsedItemsImage = mInnerItems.get(position);
String url=mParsedItemsImage.getImage();
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
collection = inflater.inflate(R.layout.template3_imageview,container,false);
TextView textView = (TextView)collection.findViewById(R.id.text_temp3);
ViewPager vp = (ViewPager)container;
textView.setText("test");
vp.addView(collection);
return textView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((TextView) object);
}
}
Template3_imageview.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="200dp">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/text_temp3"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="100dp"
android:id="#+id/imageView_template3"/>
</LinearLayout>
Output:
SO the output shows the textview added in the ArrayAdapter's getView() method :
holder.textView.setText("oyi!");
but doesn't show the one in the ViewPager Adapter:
textView.setText("test");
Please help.
P.S.: I intend to add images finally but i was testing if textviews are getting added in pager or not.So you will see some extra code in the post.
The error was in isViewFromObject() method. I changed this
#Override
public boolean isViewFromObject(View view, Object o) {
return false;
}
to
#Override
public boolean isViewFromObject(View view, Object o) {
return view == o;
}
and it worked!