Is it possible to user View pager without fragments. I google it, and all examples use fragments for view pager. I want to pager load only one item from my list, so I want to ask is it possible. Here is my code for main activity, and I want to use UpdateDisplay for viewpager. Any suggestions.
public class MainActivity extends Activity implements OnClickListener{
private Button prev, next;
private TextView tv;
private int number = 0;
private ArrayList<Integer> numbers;
private ViewPager pager;
private MyPagerAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
prev = (Button) findViewById(R.id.prevButton);
prev.setOnClickListener(this);
next = (Button) findViewById(R.id.nextButton);
next.setOnClickListener(this);
numbers = new ArrayList<Integer>();
for (int i=0;i<5;i++){
numbers.add(i);
Log.i("Sljedece elemente dodaje u listu", String.valueOf(i));
}
tv = (TextView) findViewById(R.id.rezultatTextView);
pager = (ViewPager) findViewById(R.id.pager);
adapter = new MyPagerAdapter();
pager.setAdapter(adapter);
updateDIsplay(number);
}
#Override
public void onClick(View v) {
switch(v.getId()){
case R.id.prevButton:
number--;
if (number==-1){
number = 4;
}
updateDIsplay(number);
break;
case R.id.nextButton:
number++;
if (number==5){
number = 0;
}
updateDIsplay(number);
break;
}
}
private void updateDIsplay(int z){
tv.setText(String.valueOf(numbers.get(z)));
}
private class MyPagerAdapter extends PagerAdapter{
#Override
public int getCount() {
return numbers.size();
}
#Override
public boolean isViewFromObject(View arg0, Object arg1) {
return false;
}
}
}
yes it possible. Use a PageAdapter. When instantiateItem is called, you can inflate/instantiate your view, and this to the container. E.g:
private class MyPagerAdapter extends PagerAdapter {
#Override
public Object instantiateItem(ViewGroup container, int position) {
TextView view = new TextView(PagerActivity.this);
view.setText("Item "+position);
view.setGravity(Gravity.CENTER);
view.setBackgroundColor(Color.argb(255, position * 50, position * 10, position * 50));
container.addView(view);
return view;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View)object);
}
#Override
public int getCount() {
return 5;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return (view == object);
}
}
Related
public class IMResponseActivity extendsAppCompatActivity implements
ViewPager.OnClickListener {
private static ViewPager viewPager_response;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
setContentView(R.layout.activity_imresponse);
setUI();
setViewPager();
} catch (Exception e) {
e.printStackTrace();
}
}
setViewPager() {
for (int i = 0; i < IMAGES.length; i++)
ImagesArray.add(IMAGES[i]);
viewPager_response = (ViewPager) findViewById(R.id.pager_response);
CircleIndicator indicator = (CircleIndicator) findViewById(R.id.indicator);
viewPager_response.setAdapter(new CommonSlideImageAdapter1(IMResponseActivity.this, ImagesArray));
}
public void onClick(View v) {
switch (v.getId()) {
/* case R.id.pager_response:
fragment = new ItemDetailFragment();
//Fragment fragment = new SingleProductFragment();
//Fragment fragment = new ProfileFragment();
// toolbar.setVisibility(View.GONE);
container.setVisibility(View.VISIBLE);
imresponse_layout.setVisibility(View.INVISIBLE);
ft.add(R.id.container_response_details, fragment);
ft.addToBackStack(null);
ft.commit();
break;*/
}
}
// here is my Adapter Code
public class CommonSlideImageAdapter1 extends PagerAdapter {
private ArrayList<Integer> IMAGES;
private LayoutInflater inflater;
private Context context;
public CommonSlideImageAdapter1(Context context, ArrayList<Integer> IMAGES) {
this.context = context;
this.IMAGES=IMAGES;
inflater = LayoutInflater.from(context);
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
#Override
public int getCount() {
return IMAGES.size();
}
#Override
public Object instantiateItem(ViewGroup view, final int position) {
View imageLayout = inflater.inflate(R.layout.common_slideimage_layout1, view, false);
assert imageLayout != null;
final ImageView imageView = (ImageView) imageLayout
.findViewById(R.id.image);
imageView.setImageResource(IMAGES.get(position));
imageView.setClickable(true);
imageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
view.addView(imageLayout, 0);
return imageLayout;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
#Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
#Override
public Parcelable saveState() {
return null;
}
}
Their is no direct way to implement onItemClick listener and onClickListener in viewpager because it contains different fragments and fragments have their own listeners etc.
so the
first solution for this is implement click listener in fragment
Second solution is to implement your own click listener by extending viewpager class.
to do this there is great solution available
ViewPager OnItemClickListener
hope this will help you.
I am writing a simple view pager test app that loads a bunch of data from a website and creates pages to display them.
For the most part the displaying is pretty much all works. However, it falls apart when I load a new set of data to display. When I get a new set, it loads all the data perfectly well however, instead of starting from view 0 it starts at a random location. It could start at the end or somewhere in the middle.
I want all the data to load from page 1, like a book. If you load a new book the book should start from page 1 not a random page.
Reloading calls
I've tried using GotCampDetails() which sets the local variable in the class.
viewPager.setCurrentItem(0);
in my fragment but it doesn't work. Also called notifydatasetchanged() on my adapter, still didn't work.
What am I missing?
public class ViewPagerFragment extends Fragment implements WebReadResultsListener {
private ArrayList<HashMap<String, String>> campDetails;
CustomPagerAdapter adapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.camp_viewpager, container, false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
if (campDetails != null && ! campDetails.isEmpty()) {
ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewpager);
adapter = new CustomPagerAdapter(getActivity(), campDetails, viewPager);
viewPager.setAdapter(adapter);
viewPager.setPageTransformer(true, new ZoomOutPageTransformer());
}
}
#Override
public boolean GotCampDetails(ArrayList<HashMap<String, String>> campDetails) {
this.campDetails = campDetails;
return true;
}
#Override
public boolean GotCampList(ArrayList<HashMap<String, String>> campDetails) {
return false;
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
getFragmentManager().putFragment(outState,"fragmentInstanceSaved",getFragmentManager().findFragmentById(R.id.content));
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Handle orientation changes here
}
}
Adapter:
public class CustomPagerAdapter extends PagerAdapter implements ColorChangeListener {
private ArrayList<HashMap<String, String>> campDetails;
private ViewGroup collection;
private Context mContext;
private boolean isRunning = false;
private ColorChangeListener colorChangeListener;
private int color= pink;
private int currentposition;
private ViewPager viewPager;
public CustomPagerAdapter(Context context, final ArrayList<HashMap<String, String>> campDetails, ViewPager viewPager) {
this.campDetails=campDetails;
this.mContext = context;
this.viewPager = viewPager;
colorChangeListener = (ColorChangeListener) mContext;
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int pos) {
currentposition = pos;
if (campDetails.get(currentposition).get("color").equals("green")) {
color = green;
} else {
color = pink;
}
ColorAppBar(color);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
#Override
public Object instantiateItem(ViewGroup collection, final int position) {
LayoutInflater inflater = LayoutInflater.from(mContext);
ViewGroup layout = (ViewGroup) inflater.inflate(R.layout.child_item, collection, false);
if (campDetails.size() <= 0) {
Toast.makeText(mContext, "Error in getting camp details", Toast.LENGTH_SHORT).show();
return null;
}
if (campDetails.get(position).get("description").equals("RD") ) {
layout.setBackgroundColor(mContext.getResources().getColor(green));
} else {
layout.setBackgroundColor(mContext.getResources().getColor(pink));
}
collection.addView(layout);
this.collection = collection;
TextView eName = (TextView) layout.findViewById(R.id.en);
TextView nEName= (TextView) layout.findViewById(R.id.nen);
TextView textView6 = (TextView) layout.findViewById(R.id.textView6);
// ImageView nextImg = (ImageView) groupLayout.get(index).findViewById(R.id.nextImg);
eName.setText(campDetails.get(position).get("name"));
if (position+1 < campDetails.size()) {
nEName.setText(campDetails.get(position+1).get("name"));
textView6.setVisibility(View.VISIBLE);
} else {
nEName.setText("You are DONE!!");
textView6.setVisibility(View.INVISIBLE);
}
return layout;
}
#Override
public void destroyItem(ViewGroup collection, int position, Object view) {
collection.removeView((View) view);
}
#Override
public int getCount() {
return campDetails.size();
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
#Override
public CharSequence getPageTitle(int position) {
return campDetails.get(position).get("name");
}
#Override
public void ColorAppBar(int color) {
colorChangeListener.ColorAppBar(color);
}
}
I finally managed to get it done.
I had to delay the function call setCurrentItem by a few milliseconds. Race condition? I don't know why this is the case but now it works perfectly.
Here is what I added in case someone else may find it useful:
pager.postDelayed(new Runnable() {
#Override
public void run() {
pager.setCurrentItem(pos);
}
}, 100);
I'm having trouble following the details well enough to pinpoint the problem, but this guy seems to have accomplished what you're trying to do: dynamically add and remove view to viewpager
hope it helps
I have a ViewPager in my activity. The ViewPager shows different values on swiping the pager. But I get an IllegalStateException:
PagerAdapter changed the adapter's contents without calling PagerAdapter#notifyDataSetChanged!
Expected adapter item count: 0, found: 20
Pager id: com.exalt.vts:id/summarypager Pager class: class android.support.v4.view.ViewPager
Problematic adapter: class com.exalt.vts.DashBoard$MyPagerAdapter
This is my source code for PagerAdapter:
public class SamplePagerAdapter extends PagerAdapter{
List<View> pages = null;
public SamplePagerAdapter(List<View> pages){
this.pages = pages;
}
#Override
public Object instantiateItem(View collection, int position){
View v = pages.get(position);
((ViewPager) collection).addView(v, 0);
return v;
}
#Override
public void destroyItem(View collection, int position, Object view){
((ViewPager) collection).removeView((View) view);
}
#Override
public int getCount(){
return pages.size();
}
#Override
public boolean isViewFromObject(View view, Object object){
return view.equals(object);
}
#Override
public void finishUpdate(View arg0){
}
#Override
public void restoreState(Parcelable arg0, ClassLoader arg1){
}
#Override
public Parcelable saveState(){
return null;
}
#Override
public void startUpdate(View arg0){
}
}
This is the MainActivity:
public class MainActivity extends Activity {
ViewPager viewPager;
SamplePagerAdapter myPagerAdapter;
private TextView textView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
List<View> pages = new ArrayList<View>();
viewPager = (ViewPager)findViewById(R.id.myviewpager);
myPagerAdapter = new SamplePagerAdapter(pages);
viewPager.setAdapter(myPagerAdapter);
viewPager.setCurrentItem(1);
LayoutInflater inflater = LayoutInflater.from(this);
View page = inflater.inflate(R.layout.mylayout, null);
for (int i = 0; i < 20; i++) {
page = inflater.inflate(R.layout.mylayout, null);
textView = (TextView) page.findViewById(R.id.text_view);
textView.setText("Страница "+i);
pages.add(page);
}
}
I try to add 20 views in my ViewPager but I get an exception.
You either need to move the following code from where it is currently to after your for loop, so that the adapter is set after your data set is setup
myPagerAdapter = new SamplePagerAdapter(pages);
viewPager.setAdapter(myPagerAdapter);
viewPager.setCurrentItem(1);
or alternatively, you can add the following after your for loop to notify the adapter that the data set has changed since you set it up
myPagerAdapter.notifyDataSetChanged();
I'm working viewpager and pagertitlestrip.i successfully created it and i wan add views in my viewpager.this is a my source
private ViewPager mViewPager;
TextView text;
private PagerTitleStrip mPagerTitleStrip;
View view1;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
mViewPager = (ViewPager)findViewById(R.id.viewpager);
mPagerTitleStrip = (PagerTitleStrip)findViewById(R.id.pagertitle);
//View
LayoutInflater mLi = LayoutInflater.from(this);
view1 = mLi.inflate(R.layout.activity_main, null);
text=(TextView)view1.findViewById(R.id.textView1);
//Title
final ArrayList<View> views = new ArrayList<View>();
final ArrayList<String> titles = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
view1 = mLi.inflate(R.layout.activity_main, null);
text=(TextView)view1.findViewById(R.id.textView1);
text.setText("Page"+i);
views.add(view1);
titles.add("title"+i);
}
mPagerTitleStrip.setTextColor(Color.BLUE);
//ViewPager
PagerAdapter mPagerAdapter = new PagerAdapter() {
#Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
#Override
public int getCount() {
return views.size();
}
#Override
public void destroyItem(View container, int position, Object object) {
((ViewPager)container).removeView(views.get(position));
}
#Override
public CharSequence getPageTitle(int position) {
return titles.get(position);
}
#Override
public Object instantiateItem(View container, int position) {
((ViewPager)container).addView(views.get(position));
return views.get(position);
}
};
mViewPager.setAdapter(mPagerAdapter);
}
}
now i try to write pagertitlestrip's onclicklistener.for more information,if i click 4's title i would to start(show) 4th view.onclick listener by position
how i can solve my problem?
if anyone knows solution please help me
If you want to set view manually by tapping on some indicator the you can use this
mViewPager.setCurrentItem(num);
but if you want to do something when some page is selected the you can use
ViewPager.SimpleOnPageChangeListener
for the listener understanding you can follow this
ViewPager.SimpleOnPageChangeListener
Hope this will help
I need getCurrentView by position in a ViewPager
This my ViewPagerAdapter
public class TutorialViewPagerAdapter extends ViewPagerAdapter {
private LayoutInflater mInflater;
private View view;
private List<Integer> views;
public TutorialViewPagerAdapter(Activity act, List<Integer> views) {
super(act, null);
this.views = views;
this.mInflater = LayoutInflater.from(this.activity);
}
#Override
public void destroyItem(View container, int arg1, Object view) {
((ViewPager) container).removeView((View) view);
}
#Override
public int getCount() {
return views.size();
}
#Override
public Object instantiateItem(ViewGroup collection, int position) {
int viewId = (Integer) views.get(position);
this.view = mInflater.inflate(viewId, null);
((ViewPager) collection).addView(view);
return view;
}
}
And this is my activity
public class Tutorial extends FragmentActivity implements
ViewPager.OnPageChangeListener {
private List<Integer> views;
private TutorialViewPagerAdapter viewPagerAdapter;
private ViewPager viewPager;
private CirclePageIndicator circlePageIndicator;
private int currentViewId;
private View currentView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tutorial);
init();
}
private void init() {
views = new ArrayList<Integer>();
views.add(R.layout.tutorial_step_one);
views.add(R.layout.tutorial_step_two);
views.add(R.layout.tutorial_step_three);
views.add(R.layout.tutorial_step_four);
views.add(R.layout.tutorial_step_five);
viewPagerAdapter = new TutorialViewPagerAdapter(this, views);
viewPager = (ViewPager) findViewById(R.id.steps_view_pager);
circlePageIndicator = (CirclePageIndicator) findViewById(R.id.steps_indicator);
viewPager.setAdapter(viewPagerAdapter);
viewPager.setCurrentItem(0, false);
circlePageIndicator.setViewPager(viewPager);
circlePageIndicator.setCentered(true);
circlePageIndicator.setPadding(20, 20, 20, 20);
circlePageIndicator.notifyDataSetChanged();
circlePageIndicator.setCurrentItem(0);
viewPager.setOnPageChangeListener(this);
}
#Override
public void onPageScrollStateChanged(int state) {
int currentPosition = viewPager.getCurrentItem();
circlePageIndicator.setCurrentItem(currentPosition);
enableStep(currentPosition);
}
private void enableStep(int currentPosition) {
/*viewPagerAdapter.getItemPosition(object)
currentView = viewPager.getChildAt(viewPager.getRootView());
Log.d("DEBUG", currentView.toString() + " CURRENT VIEW");*/
}
#Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
}
You could add all your created views in instantiateItem to an ArrayList<View> and then make a public method for getting a view from the ArrayList with get(position). But be carefully, as soon the Activity is finished the views could be null
Instead of ViewPagerAdapter you can use FragmentPagerAdapter which will have getItem(int position) method by using which you can easily access view.
You can take a look at this post : Android Return back to same fragment after click on goto first fragment in view pager
Hope this help!!
It's moot point. What exactly You need? Current view or view by position. Imho it is different things.
Current view:
currentView = viewPager.getCurrentItem();
Or view by index (you pass wrong parameter - should be int):
currentView = viewPager.getChildAt(currentPosition);