Develop Reference

Sharing image from `RecyclerView`

First of all, I'm sorry for my english, but I need your help.
I got a recyclerView gallery with photos and option to show the selected photo in another activity.
I`m trying to share an image that activity to somewhere, e.g. email, but I receive an empty message with no image.
Could you help me to find out, what am I doing wrong?
Below is the code of gallery activity and single image activity.
Thank you for answers.
public class MainActivity extends AppCompatActivity {
GalleryAdapter mAdapter;
RecyclerView mRecyclerView;
ArrayList<ImageModel> data = new ArrayList<>();
public static String getURLForResource(int resourceId) {
return Uri.parse("android.resource://" + R.class.getPackage().getName() + "/" + resourceId).toString();
}
public static String IMGS[];
public static String MAYF[] = {
"file:///android_asset/mayf1.jpg",
"file:///android_asset/mayf2.gif",
"file:///android_asset/mayf3.jpg",
"file:///android_asset/mayf4.jpg",
"file:///android_asset/mayf5.gif",
"file:///android_asset/mayf6.gif",
"file:///android_asset/mayf7.jpg",
"file:///android_asset/mayf8.jpg",
"file:///android_asset/mayf9.jpg",
"file:///android_asset/mayf10.jpg"
};
public static String APRF[] = {
"file:///android_asset/apr1.jpg",
"file:///android_asset/apr2.gif",
"file:///android_asset/apr3.jpg",
"file:///android_asset/apr4.jpg",
"file:///android_asset/apr5.gif",
"file:///android_asset/apr6.gif",
"file:///android_asset/apr7.jpg",
"file:///android_asset/apr8.jpg",
"file:///android_asset/apr9.jpg",
"file:///android_asset/apr10.jpg"
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (StartingActivity.count == 1)
IMGS = Arrays.copyOf(APRF, APRF.length);
else if (StartingActivity.count == 2) {
IMGS = Arrays.copyOf(MAYF, MAYF.length);
} else {
Toast.makeText(getBaseContext(), "not filled yet",
Toast.LENGTH_LONG).show();
}
for (int i = 0; i < IMGS.length; i++) {
ImageModel imageModel = new ImageModel();
imageModel.setName("Image " + i);
imageModel.setUrl(IMGS[i]);
data.add(imageModel);
}
mRecyclerView = (RecyclerView) findViewById(R.id.list);
mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3));
mRecyclerView.setHasFixedSize(true);
mAdapter = new GalleryAdapter(MainActivity.this, data);
mRecyclerView.setAdapter(mAdapter);
mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener(this,
new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
Intent intent = new Intent(MainActivity.this, DetailActivity.class);
intent.putParcelableArrayListExtra("data", data);
intent.putExtra("pos", position);
intent.putExtra("superUri", IMGS[position]);
startActivity(intent);
}
}));
}
#Override
public void onBackPressed() {
super.onBackPressed();
StartingActivity.count = 0;
}
}
This part is a part of a single image.
public class DetailActivity extends AppCompatActivity {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
private ShareActionProvider mShareActionProvider;
public ArrayList<ImageModel> data = new ArrayList<>();
int pos;
String shPos;
Toolbar toolbar;
/**
* The {#link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
//toolbar = (Toolbar) findViewById(R.id.detail_toolbar);
// setSupportActionBar(toolbar);
data = getIntent().getParcelableArrayListExtra("data");
pos = getIntent().getIntExtra("pos", 0);
shPos = getIntent().getStringExtra("superUri");
setTitle("Открытки");
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(), data);
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setPageTransformer(true, new DepthPageTransformer());
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setCurrentItem(pos);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
//noinspection ConstantConditions
//setTitle(data.get(position).getName());
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_detail, menu);
// Fetch and store ShareActionProvider
// Return true to display menu
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
return super.onOptionsItemSelected(item);
}
public void onShClick(MenuItem item) {
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(shPos));
shareIntent.setType("image/*");
startActivity(shareIntent);
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public ArrayList<ImageModel> data = new ArrayList<>();
public SectionsPagerAdapter(FragmentManager fm, ArrayList<ImageModel> data) {
super(fm);
this.data = data;
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position, data.get(position).getName(), data.get(position).getUri());
}
#Override
public int getCount() {
// Show 3 total pages.
return data.size();
}
#Override
public CharSequence getPageTitle(int position) {
return data.get(position).getName();
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
String name, url;
int pos;
private static final String ARG_SECTION_NUMBER = "section_number";
private static final String ARG_IMG_TITLE = "image_title";
private static final String ARG_IMG_URL = "image_url";
#Override
public void setArguments(Bundle args) {
super.setArguments(args);
this.pos = args.getInt(ARG_SECTION_NUMBER);
this.name = args.getString(ARG_IMG_TITLE);
this.url = args.getString(ARG_IMG_URL);
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber, String name, String url) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
args.putString(ARG_IMG_TITLE, name);
args.putString(ARG_IMG_URL, url);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
#Override
public void onStart() {
super.onStart();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
final ImageView imageView = (ImageView) rootView.findViewById(R.id.detail_image);
Glide.with(getActivity()).load(url).thumbnail(0.1f).into(imageView);
return rootView;
}
}
}
Here is an example of trying to share image via gmail. I can see the image "attached", but can`t open it. Another email receives an empty message with no attachment inside.
sharing example

Created a gridview in a tablayout and try to update Gridview with a Intent service

I have created a Tabbed layout in a Activity. My Activity as following point for consideration
1. Number of tabs depends on sorting type available for a Source object. There can be max three tabs i.e. Top, Latest and popular.
2. Each tab contains a GridView and it should be updated when IntentService gets data
3. User can choose the Source from toolbar
4. When new Source is selected, number of tabs should be according to new Source and GridView should also update accordingly
TabbedActivity
public class TabbedActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager mViewPager;
private List<Source> allSourceItem;
private Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tabbed);
context = this;
// register broadcast
IntentFilter statusIntentFilter = new IntentFilter(Asset.ARTICLE_BROADCAST_ACTION);
TabbedActivity.ArticleStateReceiver mDownloadStateReceiver = new TabbedActivity.ArticleStateReceiver();
LocalBroadcastManager.getInstance(this).registerReceiver(mDownloadStateReceiver, statusIntentFilter);
// set toolbar
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// set tab layout
tabLayout = (TabLayout) findViewById(R.id.tab_layout);
// set the viewpager
mViewPager = (ViewPager) findViewById(R.id.container);
// set up page listner to viewpager
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
startSetUp(getRecentDisplayedData());
}
public void startSetUp(Source src){
int tabsCount = 3;
setTitle(src.getName());
tabsCount = getNumberOfTabs(src.getSortByAvailableTop(),src.getSortByAvailableLatest(),src.getSortByAvailablePopular());
setTabs(tabsCount);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
mViewPager.setAdapter(new SectionsPagerAdapter(getSupportFragmentManager(),tabsCount,src));
}
// handle menus of activity
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_tabbed, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
Intent intent = new Intent(this, SourcesActivity.class);
intent.putExtra("SOURCE_ACTIVITY_ACTION","TABBED");
startActivity(intent);
return true;
}
if(id == R.id.change_src){
//get all selected sources
allSourceItem = Source.getAll();
List<String> listItems = new ArrayList<String>();
for(int i = 0; i < allSourceItem.size(); i++ ){
listItems.add(allSourceItem.get(i).getName());
}
final CharSequence[] items = listItems.toArray(new CharSequence[listItems.size()]);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(R.string.chnage_news_source);
builder.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
Source.updateRecentDisplayed(allSourceItem.get(item));
restartActivity();
}
});
AlertDialog alert = builder.create();
alert.show();
}
return super.onOptionsItemSelected(item);
}
// for creatting tabs Fragments
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private GridView mGridView;
private ArticleAdapter mArticleAdapter;
private ArrayList<Article> mGridData = new ArrayList<Article>();
private TextView tv;
private static final String ARG_SECTION_NUMBER = "section_number";
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_tabbed, container, false);
tv = (TextView) rootView.findViewById(R.id.test_tv);
tv.setText("Page counter :: "+getArguments().getInt(ARG_SECTION_NUMBER));
mGridView = (GridView) rootView.findViewById(R.id.article_grid);
update(mGridData);
return rootView;
}
public void update(ArrayList<Article> data){
mArticleAdapter = new ArticleAdapter(getContext(),R.layout.aricle_grid_element,data);
mGridView.setAdapter(mArticleAdapter);
}
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
int tabsCount;
Source src;
public SectionsPagerAdapter(FragmentManager fm, int tabsCount, Source src) {
super(fm);
this.tabsCount = tabsCount;
this.src = src;
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
if( position == 0){
runArticleService(position+1);
return PlaceholderFragment.newInstance(position + 1);
}else if (position == 1){
runArticleService(position+1);
return PlaceholderFragment.newInstance(position + 1);
}else if (position == 2){
runArticleService(position+1);
return PlaceholderFragment.newInstance(position + 1);
}
return null;
}
#Override
public int getCount() {
// Show 3 total pages.
return tabsCount;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
case 2:
return "SECTION 3";
}
return null;
}
private void runArticleService(int tabNumber){
Intent mServiceIntent = new Intent(getBaseContext(), ArticleService.class);
mServiceIntent.setData(Uri.parse(Asset.getSourceArticleURL(src.getUniqueId(),tabNumber)));
startService(mServiceIntent);
}
}
// broadcast receivers handle
private class ArticleStateReceiver extends BroadcastReceiver
{
private ArticleStateReceiver() {
}
// Called when the BroadcastReceiver gets an Intent it's registered to receive
#Override
public void onReceive(Context context, Intent intent) {
String response = intent.getStringExtra(Asset.ARTICLE_EXTENDED_DATA_TYPE);
String sortType = intent.getStringExtra(Asset.ARTICLE_EXTENDED_DATA_SORT);
if(sortType.equals("TOP")){
SectionsPagerAdapter sectionsPagerAdapter = (SectionsPagerAdapter) mViewPager.getAdapter();
PlaceholderFragment placeholderFragment = (PlaceholderFragment) sectionsPagerAdapter.getItem(0);
placeholderFragment.update(Asset.getArticleObjectFromJSON(response.toString()));
}else if(sortType.equals("LATEST")){
SectionsPagerAdapter sectionsPagerAdapter = (SectionsPagerAdapter) mViewPager.getAdapter();
PlaceholderFragment placeholderFragment = (PlaceholderFragment) sectionsPagerAdapter.getItem(1);
placeholderFragment.update(Asset.getArticleObjectFromJSON(response.toString()));
}else if(sortType.equals("POPULAR")){
SectionsPagerAdapter sectionsPagerAdapter = (SectionsPagerAdapter) mViewPager.getAdapter();
PlaceholderFragment placeholderFragment = (PlaceholderFragment) sectionsPagerAdapter.getItem(2);
placeholderFragment.update(Asset.getArticleObjectFromJSON(response.toString()));
}
}
}
// Extra methods
private int getNumberOfTabs(boolean top, boolean latest, boolean popular ){
if( top && latest && popular){
return 3;
}else if( top && latest && !popular ){
return 2;
}else if( top && !latest && !popular ){
return 1;
}else{
return 1;
}
}
private void setTabs(int tabCount){
tabLayout.removeAllTabs();
if(tabCount == 3){
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_1_text)));
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_2_text)));
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_3_text)));
}
if(tabCount == 2){
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_1_text)));
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_2_text)));
}
if(tabCount == 1){
tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.tab_1_text)));
}
}
private Source getRecentDisplayedData(){
Source src = Source.getRecentDisplayed();
if(src!=null){
return src;
}else{
src = Source.getRandom();
Source.updateRecentDisplayed(src);
return Source.getRecentDisplayed();
}
}
public void restartActivity(){
Intent myIntent = new Intent(this, TabbedActivity.class);
startActivity(myIntent);
finish();
}
}
IntentService
public class ArticleService extends IntentService {
public String responseStr = null;
public String urlStr = null;
public ArticleService() {
super("ArticleService");
}
#Override
protected void onHandleIntent(Intent intent) {
Uri url = intent.getData();
urlStr = url.toString();
responseStr = Asset.fetchSourceDataFromURL(urlStr);
sendBroadcast();
}
protected void sendBroadcast(){
Intent localIntent = new Intent(Asset.ARTICLE_BROADCAST_ACTION).putExtra(Asset.ARTICLE_EXTENDED_DATA_TYPE,responseStr);
if(urlStr.toLowerCase().contains(Asset.SORT_TOP_URL.toLowerCase())){
localIntent.putExtra(Asset.ARTICLE_EXTENDED_DATA_SORT,"TOP");
}else if (urlStr.toLowerCase().contains(Asset.SORT_LATEST_URL.toLowerCase())){
localIntent.putExtra(Asset.ARTICLE_EXTENDED_DATA_SORT,"LATEST");
}else if (urlStr.toLowerCase().contains(Asset.SORT_POPULAR_URL.toLowerCase())){
localIntent.putExtra(Asset.ARTICLE_EXTENDED_DATA_SORT,"POPULAR");
}
LocalBroadcastManager.getInstance(this).sendBroadcast(localIntent);
}
}
Error that I am not able to understand
01-26 07:57:29.789 1494-1494/in.co.yogender.newsnick.newsnick E/AndroidRuntime: FATAL EXCEPTION: main
Process: in.co.yogender.newsnick.newsnick, PID: 1494
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference
at android.view.LayoutInflater.from(LayoutInflater.java:232)
at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:181)
at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:166)
at in.co.yogender.newsnick.newsnick.Adapters.ArticleAdapter.<init>(ArticleAdapter.java:0)
at in.co.yogender.newsnick.newsnick.TabbedActivity$PlaceholderFragment.update(TabbedActivity.java:197)
at in.co.yogender.newsnick.newsnick.TabbedActivity$ArticleStateReceiver.onReceive(TabbedActivity.java:273)
at android.support.v4.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:297)
at android.support.v4.content.LocalBroadcastManager.access$000(LocalBroadcastManager.java:46)
at android.support.v4.content.LocalBroadcastManager$1.handleMessage(LocalBroadcastManager.java:116)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Thanks in advance

I think, you are updating GridView from IntentService where Context is null. Try to pull context from IntentService like below and let me know.
public void update(Context cont, ArrayList<Article> data){
mArticleAdapter = new ArticleAdapter(cont, R.layout.aricle_grid_element,data);
mGridView.setAdapter(mArticleAdapter);
}

how to share images using view pager

public class EyeLinerActivity extends Activity {
int position;
private ShareActionProvider provider;
ELImageAdapter adapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_eyeliner);
//ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
//adapter = new ELImageAdapter(this);
//viewPager.setAdapter(adapter);
//ViewPager.setCurrentItem(0);
ViewPager pager = (ViewPager) findViewById(R.id.view_pager);
adapter = new ELImageAdapter(this);
pager.setAdapter(new ELImageAdapter(this));
// ImageView imageView = new ImageView(context);
// imageView.setImageResource(GalImages[position]);
// if (pager.getAdapter() != null)
// pager.setAdapter(adapter);
// pager.setCurrentItem(position);
}
#SuppressLint("NewApi")
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
MenuItem shareitem= (MenuItem)menu.findItem(R.id.action_share);
ShareActionProvider provider = (ShareActionProvider)shareitem.getActionProvider();
Bitmap bitmap;
OutputStream output;
//ArrayList<Uri> imageUris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
bitmap = BitmapFactory.decodeResource(getResources(),adapter.GalImages[position]);
File filepath = Environment.getExternalStorageDirectory();
File dir = new File(filepath.getAbsolutePath() + "/Eye Liner/");
dir.mkdirs();
File file = new File(dir, "Image.png");
try {
Intent share = new Intent(Intent.ACTION_SEND);
share.setAction(Intent.ACTION_SEND);
share.setType("image/jpeg");
output = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, output);
output.flush();
output.close();
Uri uri = Uri.fromFile(file);
share.putExtra(Intent.EXTRA_STREAM, uri);
provider.setShareIntent(share);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return true;
}
//return super.onCreateOptionsMenu(menu);
private void setShareIntent(Intent intent) {
if (provider != null) {
provider.setShareIntent(intent);
}
}
}
adapter.java
public class ELImageAdapter extends PagerAdapter {
Context context;
public int[] GalImages = new int[] {
R.drawable.l_1,
R.drawable.l_2,
R.drawable.l_3,
R.drawable.l_4,
R.drawable.l_5,
R.drawable.l_6,
R.drawable.l_7,
R.drawable.l_8,
R.drawable.l_9,
R.drawable.l_10,
R.drawable.l_11,
R.drawable.l_12,
R.drawable.l_13,
R.drawable.l_14,
R.drawable.l_15,
R.drawable.l_16,
R.drawable.l_17
};
ELImageAdapter(Context context){
this.context=context;
}
#Override
public int getCount() {
return GalImages.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(context);
int padding = context.getResources().getDimensionPixelSize(R.dimen.activity_horizontal_margin);
imageView.setPadding(padding, padding, padding, padding);
imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
imageView.setImageResource(GalImages[position]);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
}
i want to share images .. and i am using viewpager
how can i get images ids to share.? as viewpager does not support onclickitemlistener property. kindly suggest how i can get image id to dhare

If you implement a FragmentStatePagerAdapter, each page of your ViewPager can host an instance of a Fragment of your design, with its layout defined in XML. This will allow you to include whatever Views you need to compose your custom sharing UI.
From Creating Swipe Views with Tabs | Android Developers:
FragmentStatePagerAdapter
This is best for paging across a collection of objects for which the number of pages is undetermined. It destroys fragments as the user navigates to other pages, minimizing memory usage.
For example, here's how you might use FragmentStatePagerAdapter to swipe across a collection of Fragment objects:
public class CollectionDemoActivity extends FragmentActivity {
// When requested, this adapter returns a DemoObjectFragment,
// representing an object in the collection.
DemoCollectionPagerAdapter mDemoCollectionPagerAdapter;
ViewPager mViewPager;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_collection_demo);
// ViewPager and its adapters use support library
// fragments, so use getSupportFragmentManager.
mDemoCollectionPagerAdapter =
new DemoCollectionPagerAdapter(
getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mDemoCollectionPagerAdapter);
}
}
// Since this is an object collection, use a FragmentStatePagerAdapter,
// and NOT a FragmentPagerAdapter.
public class DemoCollectionPagerAdapter extends FragmentStatePagerAdapter {
public DemoCollectionPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = new DemoObjectFragment();
Bundle args = new Bundle();
// Our object is just an integer :-P
args.putInt(DemoObjectFragment.ARG_OBJECT, i + 1);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
return 100;
}
#Override
public CharSequence getPageTitle(int position) {
return "OBJECT " + (position + 1);
}
}
// Instances of this class are fragments representing a single
// object in our collection.
public static class DemoObjectFragment extends Fragment {
public static final String ARG_OBJECT = "object";
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// The last two arguments ensure LayoutParams are inflated
// properly.
View rootView = inflater.inflate(
R.layout.fragment_collection_object, container, false);
Bundle args = getArguments();
((TextView) rootView.findViewById(android.R.id.text1)).setText(
Integer.toString(args.getInt(ARG_OBJECT)));
return rootView;
}
}

In your case you could change share intent on every page selected event, like following:
pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int i, float v, int i2) {
}
#Override
public void onPageSelected(int i) {
setShareIntentForPosition(i);
}
#Override
public void onPageScrollStateChanged(int i) {
}
});
private void setShareIntentForPosition(int currentPosition){
Bitmap bitmap;
OutputStream output;
bitmap = BitmapFactory.decodeResource(getResources(),adapter.GalImages[currentPosition]);
File filepath = Environment.getExternalStorageDirectory();
File dir = new File(filepath.getAbsolutePath() + "/Eye Liner/");
dir.mkdirs();
File file = new File(dir, "Image.png");
try {
Intent share = new Intent(Intent.ACTION_SEND);
share.setAction(Intent.ACTION_SEND);
share.setType("image/jpeg");
output = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, output);
output.flush();
output.close();
Uri uri = Uri.fromFile(file);
share.putExtra(Intent.EXTRA_STREAM, uri);
setShareIntent(share);
}
private void setShareIntent(Intent intent) {
if (provider != null) {
provider.setShareIntent(intent);
}
}

how can i get images ids to share.?
Use ViewPager.getCurrentItem() to get current image id from ViewPager:
1. Create a method in ELImageAdapter class to get current selected image id :
public int getImageId(int pos){
return GalImages[pos];
}
2. Call getImageId method using adapter object in onCreateOptionsMenu method :
int currentPos=pager.getCurrentItem();
int currentImgId=adapter.getImageId(currentPos);
Now use currentImgId id to share selected image.

File file = new File(adapter.images.get(myPager.getCurrentItem()));
Intent mShareIntent = new Intent(Intent.ACTION_SEND);
mShareIntent.setType("image/*");
mShareIntent.putExtra(Intent.EXTRA_STREAM,Uri.fromFile(file));
startActivity(Intent.createChooser(mShareIntent,"Shareith:"));
Where adapter is object of CustomAdapter creating pages for viewpager, myPager is reference variable for ViewPager enter code here and images is arraylist storing imagepath.

Send List from activity to fragment android

I´ve got the following problem. After parsing a local xml file from the assets folder to a list I would like to send this parsed list to a fragment, which should show specific entries from this list in a listview.
Parsing works, the listview works, but I´m not sure, how to send lists via intent bundle extra to a fragment and how I can get this intent within the fragment.
At this example I would like to send the List<RowItem> pois to the static fragment class RouteItemFragment. The error is at
pois = getActivity().getIntent().getParcelableArrayListExtra("pois");
Message:
inferred type for type parameter T is not within its bound. should implement android.os.parcelable
Has anyone a hint for me?
public class RouteView extends ActionBarActivity implements ActionBar.TabListener {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*
*/
Integer citySave;
Integer routeSave;
String routeTitel;
private static int NUM_ITEMS = 2;
SectionsPagerAdapter mSectionsPagerAdapter;
ListView listView;
List<RowItem> pois;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_route_view);
Bundle b = getIntent().getExtras();
citySave = b.getInt("stadt");
routeSave = b.getInt("route");
routeTitel = b.getString("titel_route");
b.putString("titel_route",routeTitel);
b.putInt("route", routeSave);
RouteItemFragment fragobj = new RouteItemFragment();
fragobj.setArguments(b);
try {
PoiParser parser = new PoiParser();
pois = parser.parse(getAssets().open("poi_passau1.xml"));
b.putParcelableArrayList("pois", (java.util.ArrayList<? extends android.os.Parcelable>) pois);
} catch (IOException e) {
e.printStackTrace();
}
// Set up the action bar.
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.route_view, menu);
return true;
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (position){
case 0:
return RouteItemFragment.newInstance(position);
case 1:
return MapFragment.newInstance(position);
default:
return PlaceholderFragment.newInstance(position);
}
}
#Override
public int getCount() {
// Show 2 total pages.
return NUM_ITEMS;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
}
return null;
}
}
public static class RouteItemFragment extends ListFragment implements AdapterView.OnItemClickListener {
private static final String ARG_SECTION_NUMBER = "section_number";
ListView listView;
List<RowItem> pois;
public static RouteItemFragment newInstance(int sectionNumber) {
RouteItemFragment fragment = new RouteItemFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public RouteItemFragment() {
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
pois = getActivity().getIntent().getParcelableArrayListExtra("pois");
CityListViewAdapter adapter = new CityListViewAdapter(getActivity(), R.layout.row_items, pois);
/**Collections.sort(pois, new Comparator<RowItem>() {
public int compare(RowItem s1, RowItem s2) {
return s1.getID().compareTo(s2.getID());
}
});*/
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_route_item, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.textRouteitem);
listView = (ListView) rootView.findViewById(android.R.id.list);
textView.setText(String.format(getResources().getString(R.string.routeViewfragment)) + " "
+ getActivity().getIntent().getStringExtra("titel_route"));
return rootView;
}
#Override
public void onItemClick(AdapterView<?> adapterView, View parent, int position, long l) {
Intent intent = new Intent();
intent.setClass(getActivity(), PoiView.class);
RowItem pois = (RowItem) getListView().getItemAtPosition(position);
Bundle b = new Bundle();
//b.putInt("stadt", cities.getID());
b.putParcelableArrayList("titel_stadt", pois);
intent.putExtras(b);
startActivity(intent);
}
}
public static class MapFragment extends Fragment implements
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener {
private static final String ARG_SECTION_NUMBER = "section_number";
private GoogleMap mMap;
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static MapFragment newInstance(int sectionNumber) {
MapFragment fragment = new MapFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
public MapFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_map, container, false);
setUpMapIfNeeded();
return rootView;
}
#Override
public void onConnected(Bundle bundle) {
}
#Override
public void onDisconnected() {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_route_view, container, false);
return rootView;
}
}
public void onBackPressed() {
super.onBackPressed();
Intent intent = new Intent();
intent.setClass(RouteView.this, RouteChooseActivity.class);
Bundle b = new Bundle();
b.putInt("stadt", citySave);
intent.putExtras(b);
startActivity(intent);
finish();
}
public void onPause() {
super.onPause();
Bundle b = new Bundle();
b.putInt("stadt", citySave);
b.putInt("route", routeSave);
b.putString("route_titel",routeTitel);
finish();
}
public void onResume() {
super.onResume();
Bundle b = getIntent().getExtras();
citySave = b.getInt("stadt");
routeSave = b.getInt("route");
routeTitel = b.getString("route_titel");
}
public void onStop() {
super.onStop();
finish();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
switch (item.getItemId()) {
case R.id.action_stadt:
setContentView(R.layout.activity_stadt);
Intent stadt = new Intent(RouteView.this, StadtActivity.class);
startActivity(stadt);
return true;
case R.id.action_route:
setContentView(R.layout.activity_route_choose);
Intent route = new Intent(RouteView.this, RouteChooseActivity.class);
startActivity(route);
return true;
case R.id.action_help:
setContentView(R.layout.activity_help);
Intent help = new Intent(RouteView.this, Help.class);
startActivity(help);
return true;
case R.id.action_exit:
moveTaskToBack(true);
System.exit(0);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
PoiParser:
public class PoiParser {
List<RowItem> pois;
private RowItem poi;
private String text;
public PoiParser() {
pois = new ArrayList<RowItem>();
}
public List<RowItem> getPois() {
return pois;
}
public List<RowItem> parse(InputStream is) {
XmlPullParserFactory factory = null;
XmlPullParser parser = null;
try {
factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
parser = factory.newPullParser();
parser.setInput(is, null);
int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
String tagname = parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (tagname.equalsIgnoreCase("poi")) {
poi = new RowItem();
}
break;
case XmlPullParser.TEXT:
text = parser.getText();
break;
case XmlPullParser.END_TAG:
if (tagname.equalsIgnoreCase("poi")) {
pois.add(poi);
} else if (tagname.equalsIgnoreCase("image")) {
poi.setImage(text);
} else if (tagname.equalsIgnoreCase("id")) {
poi.setID(Integer.parseInt(text));
} else if (tagname.equalsIgnoreCase("name")) {
poi.setTitle(text);
} else if (tagname.equalsIgnoreCase("desc")) {
poi.setDesc(text);
} else if (tagname.equalsIgnoreCase("imagedesc")) {
poi.setImageDesc(text);
} else if (tagname.equalsIgnoreCase("infotext")) {
poi.setInfoText(text);
} else if (tagname.equalsIgnoreCase("audio")) {
poi.setAudioPoi(text);
} else if (tagname.equalsIgnoreCase("latitude")) {
poi.setLatitudePoi(Double.parseDouble(text));
} else if (tagname.equalsIgnoreCase("longitude")) {
poi.setLongitudePoi(Double.parseDouble(text));
}
break;
default:
break;
}
eventType = parser.next();
}
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return pois;
}
}
RowItem
public class RowItem extends ArrayList<Parcelable> {
private String Bild;
private String Titel;
private String Desc;
private String imageDesc;
private String infoText;
private String audioPoi;
private int ID;
private double latitudePoi;
private double longitudePoi;
public RowItem() {
this.Bild = Bild;
this.Titel = Titel;
this.Desc = Desc;
this.imageDesc = imageDesc;
this.infoText = infoText;
this.audioPoi = audioPoi;
this.ID = ID;
this.latitudePoi = latitudePoi;
this.longitudePoi = longitudePoi;
}
public int getID() {return ID;}
public void setID(int ID) {this.ID = ID;}
public double getLatitudePoi() {return latitudePoi;}
public void setLatitudePoi(double latitudePoi) {this.latitudePoi = latitudePoi;}
public double getLongitudePoi() {return longitudePoi;}
public void setLongitudePoi(double longitudePoi) {this.longitudePoi = longitudePoi;}
public String getImage() {
return Bild;
}
public void setImage(String imageId) {
this.Bild = imageId;
}
public String getDesc() {
return Desc;
}
public void setDesc(String desc) {
this.Desc = desc;
}
public String getTitle() {
return Titel;
}
public void setTitle(String title) {
this.Titel = title;
}
public String getImageDesc() {return imageDesc;}
public void setImageDesc(String imageDesc){this.imageDesc = imageDesc;}
public String getInfoText() {return infoText;}
public void setInfoText(String infoText) {this.infoText = infoText;}
public String getAudioPoi() {return audioPoi;}
public void setAudioPoi(String audioPoi) {this.audioPoi = audioPoi;}
#Override
public String toString() {
return Titel + "\n" + Desc;
}
}

You should implement Parcelable interface for RowItem.
And also change your code
b.putParcelableArrayList("pois", pois);
public class RowItem implements Parcelable {
private String Bild;
private String Titel;
private String Desc;
private String imageDesc;
private String infoText;
private String audioPoi;
private int ID;
private double latitudePoi;
private double longitudePoi;
public RowItem() {
}
public RowItem(Parcel in) {
Bild = in.readString();
Titel = in.readString();
Desc = in.readString();
imageDesc = in.readString();
infoText = in.readString();
audioPoi = in.readString();
ID = in.readInt();
latitudePoi = in.readDouble();
longitudePoi = in.readDouble();
}
public int getID() {return ID;}
public void setID(int ID) {this.ID = ID;}
public double getLatitudePoi() {return latitudePoi;}
public void setLatitudePoi(double latitudePoi) {this.latitudePoi = latitudePoi;}
public double getLongitudePoi() {return longitudePoi;}
public void setLongitudePoi(double longitudePoi) {this.longitudePoi = longitudePoi;}
public String getImage() {
return Bild;
}
public void setImage(String imageId) {
this.Bild = imageId;
}
public String getDesc() {
return Desc;
}
public void setDesc(String desc) {
this.Desc = desc;
}
public String getTitle() {
return Titel;
}
public void setTitle(String title) {
this.Titel = title;
}
public String getImageDesc() {return imageDesc;}
public void setImageDesc(String imageDesc){this.imageDesc = imageDesc;}
public String getInfoText() {return infoText;}
public void setInfoText(String infoText) {this.infoText = infoText;}
public String getAudioPoi() {return audioPoi;}
public void setAudioPoi(String audioPoi) {this.audioPoi = audioPoi;}
#Override
public String toString() {
return Titel + "\n" + Desc;
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(Bild);
dest.writeString(Titel);
dest.writeString(Desc);
dest.writeString(imageDesc);
dest.writeString(infoText);
dest.writeString(audioPoi);
dest.writeInt(ID);
dest.writeDouble(latitudePoi);
dest.writeDouble(longitudePoi);
}
#SuppressWarnings("rawtypes")
public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
public RowItem createFromParcel(Parcel in) {
return new RowItem(in);
}
public RowItem[] newArray(int size) {
return new RowItem[size];
}
};
}

Replacing a fragment from ViewPager android

SCENARIO
I am creating a fragment structure with dynamic fragment creations. Each item in the fragment creates the next fragment. In the scenario I am storing all these fragments in the ArrayList of fragments so that I can easily replace the created fragment.
PROBLEM
Now I am replacing a fragment from the ArrayList by removing the fragment from a particular index and adding the new one. But when I try to get the fragment from that particular index it returns me the old data without calling the getItem function of the FragmentStateAdapter again.
Here is my Main class.
MainActivity.java
public class MainActivity extends FragmentActivity implements
onPageSelectedListener {
SectionsPagerAdapter mSectionsPagerAdapter;
static int current, listItem;
static String TAG = "MainActivity";
static ViewPager mViewPager;
static ArrayList<Fragment> FragmentList;
static ArrayList<String> titles;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
public void init(){
FragmentList = new ArrayList<Fragment>();
titles = new ArrayList<String>();
mViewPager = (ViewPager) findViewById(R.id.pager);
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
mViewPager.setAdapter(mSectionsPagerAdapter);
}
public void addPage(int position, String title, String file, String tag) {
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putString(DummySectionFragment.ARG_FILE_NAME, file);
args.putString(DummySectionFragment.ARG_FILE_TAG, tag);
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position);
fragment.setArguments(args);
titles.add(position, title);
FragmentList.add(position, fragment);
}
public void NextScreen(int position, String title, String file, String tagname) {
if(FragmentList.size()>(position-1)){
for(int i=position; i<FragmentList.size(); i++){
FragmentList.remove(i);
}
}
addPage(position, title, file, tagname);
mViewPager.setCurrentItem(position);
}
public static class PageChanger extends
ViewPager.SimpleOnPageChangeListener {
private int currentPage;
#Override
public void onPageSelected(int position) {
currentPage = position;
}
public int getCurrentScreen() {
return currentPage;
}
}
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
addPage(0, "Main Fragment", "test.xml", "mytag");
}
#Override
public Fragment getItem(int position) {
return FragmentList.get(position);
}
#Override
public int getCount() {
return FragmentList.size();
}
#Override
public CharSequence getPageTitle(int position) {
if (position == 0) {
return "Main Categories";
}
getItem(position);
return titles.get(position);
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
super.destroyItem(container, position, object);
}
}
public static class DummySectionFragment extends Fragment {
public static final String ARG_SECTION_NUMBER = "section_number";
public static final String ARG_FILE_NAME = "file_name";
public static final String ARG_FILE_TAG = "tag_name";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
savedInstanceState = this.getArguments();
ListView parent_list = new ListView(getActivity());
String file_name = savedInstanceState.getString(ARG_FILE_NAME);
String tag_name = savedInstanceState.getString(ARG_FILE_TAG);
int current_level = savedInstanceState.getInt(ARG_SECTION_NUMBER);
PullParser pull = new PullParser(getActivity());
pull.pullXml(file_name, tag_name);
parent_list.setAdapter(new ListAdapter(getActivity(),
PullParser.Xml_Tag_Info, current_level));
return parent_list;
}
}
#Override
public void onPageSelected(int pageno) {
current = pageno;
}
}

I have found the answer just to reinstantiate the adapter after making the necessary changes. The edited code is here.
MainActivity.java
public class MainActivity extends FragmentActivity {
SectionsPagerAdapter mSectionsPagerAdapter;
static int current, listItem;
static String TAG = "MainActivity";
static boolean flag = false;
/**
* The {#link ViewPager} that will host the section contents.
*/
static ViewPager mViewPager;
static ArrayList<DummySectionFragment> FragmentList;
static ArrayList<String> titles;
static FragmentManager fragManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
public void init() {
FragmentList = new ArrayList<DummySectionFragment>();
titles = new ArrayList<String>();
mViewPager = (ViewPager) findViewById(R.id.pager);
fragManager = getSupportFragmentManager();
mSectionsPagerAdapter = new SectionsPagerAdapter(fragManager);
mViewPager.setAdapter(mSectionsPagerAdapter);
titles.add(0, "Main Categories");
}
public void addPage(final int position, String file, String tag) {
DummySectionFragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putString(DummySectionFragment.ARG_FILE_NAME, file);
args.putString(DummySectionFragment.ARG_FILE_TAG, tag);
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position);
fragment.setArguments(args);
try {
FragmentList.set(position, fragment);
} catch (IndexOutOfBoundsException e) {
FragmentList.add(position, fragment);
} catch (Exception e) {
e.printStackTrace();
}
}
public void destroyFragment(int position) {
SectionsPagerAdapter pagerAdapter = (SectionsPagerAdapter) mViewPager
.getAdapter();
pagerAdapter.destroyItem(mViewPager, position,
FragmentList.get(position));
pagerAdapter.notifyDataSetChanged();
}
public void addFragment(int position, Object object) {
SectionsPagerAdapter pagerAdapter = (SectionsPagerAdapter) mViewPager
.getAdapter();
pagerAdapter.notifyDataSetChanged();
}
public void NextScreen(int position, String title, String file,
String tagname) {
if (FragmentList.size() > position - 1) {
for (int i = FragmentList.size() - 1; i > position; i--) {
titles.remove(i);
FragmentList.remove(i);
}
titles.trimToSize();
FragmentList.trimToSize();
}
titles.add(position, title);
addPage(position, file, tagname);
mViewPager.setAdapter(new SectionsPagerAdapter(fragManager));
mViewPager.setCurrentItem(position);
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
addPage(0, "catlist.xml", "pid-0");
}
#Override
public Fragment getItem(int position) {
return FragmentList.get(position);
}
public void setId() {
}
#Override
public int getCount() {
return FragmentList.size();
}
#Override
public int getItemPosition(Object object) {
return FragmentList.indexOf(object);
}
#Override
public CharSequence getPageTitle(int position) {
Log.v("titlePosition", position + "");
return titles.get(position);
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static ArrayList<Xml_Item_Data> resultList = new ArrayList<Xml_Item_Data>();
public static final String ARG_SECTION_NUMBER = "section_number";
public static final String ARG_FILE_NAME = "file_name";
public static final String ARG_FILE_TAG = "tag_name";
ListView parent_list;
public static Bundle setValues;
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
savedInstanceState = this.getArguments();
parent_list = new ListView(getActivity());
String file_name = savedInstanceState.getString(ARG_FILE_NAME);
String tag_name = savedInstanceState.getString(ARG_FILE_TAG);
int current_level = savedInstanceState.getInt(ARG_SECTION_NUMBER);
PullParser pull = new PullParser(getActivity());
pull.pullXml(file_name, tag_name);
ListAdapter list_Creator = new ListAdapter(getActivity(),
PullParser.Xml_Tag_Info, current_level);
parent_list.setAdapter(list_Creator);
return parent_list;
}
}
}

I think you can try return POSITION_NONE in your getItemPosition() method. Like here: How to force ViewPager to re-instantiate its items