i have long text and i m separating this text into pages but for the first time it shows but second time it showing blank screen..
i have taken code from this link reference link
2.Problem
if i swiped all the pages to Left so sometimes when i swipe right this won't swipe
Why data only showing for the first time and not not thenAfter ...is this Fragment Proble?
codes are below
public class FeedDetail extends Fragment {
View view;
Feeds feeds;
private ViewPager pagesView;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.feed_detail, container, false);
return view;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
bindViews();
}
private void bindViews() {
pagesView = (ViewPager) view.findViewById(R.id.pages);
Bundle bundle = getArguments();
if (bundle != null) {
feeds = (Feeds) bundle.getSerializable("data");
if (feeds != null) {
try {
pagesView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
PageSplitter pageSplitter = new PageSplitter(pagesView.getWidth(), pagesView.getHeight(), 1, 0);
TextPaint textPaint = new TextPaint();
textPaint.setTextSize(getResources().getDimension(R.dimen.text_size));
pageSplitter.append(feeds.getDescription(), textPaint);
pagesView.setAdapter(new TextPagerAdapter(getActivity().getSupportFragmentManager(), pageSplitter.getPages()));
pagesView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
});
} catch (Exception e) {
Log.e("catch", e.toString());
}
}
}
TextPagerAdapter.class
public class TextPagerAdapter extends FragmentPagerAdapter {
private final List<CharSequence> pageTexts;
public TextPagerAdapter(FragmentManager fm, List<CharSequence> pageTexts) {
super(fm);
this.pageTexts = pageTexts;
}
@Override
public Fragment getItem(int i) {
return PageFragment.newInstance(pageTexts.get(i));
}
@Override
public int getCount() {
return pageTexts.size();
}
}
PagerFragment class
public class PageFragment extends Fragment {
private final static String PAGE_TEXT = "PAGE_TEXT";
public static PageFragment newInstance(CharSequence pageText) {
PageFragment frag = new PageFragment();
Bundle args = new Bundle();
args.putCharSequence(PAGE_TEXT, pageText);
frag.setArguments(args);
return frag;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
CharSequence text = getArguments().getCharSequence(PAGE_TEXT);
TextView pageView = (TextView) inflater.inflate(R.layout.page, container, false);
pageView.setTextSize(TypedValue.COMPLEX_UNIT_PX, getResources().getDimension(R.dimen.text_size));
pageView.setText(text);
return pageView;
}
}
PageSplitter class
public class PageSplitter {
private final int pageWidth;
private final int pageHeight;
private final float lineSpacingMultiplier;
private final int lineSpacingExtra;
private final List<CharSequence> pages = new ArrayList<CharSequence>();
private SpannableStringBuilder currentLine = new SpannableStringBuilder();
private SpannableStringBuilder currentPage = new SpannableStringBuilder();
private int currentLineHeight;
private int pageContentHeight;
private int currentLineWidth;
private int textLineHeight;
public PageSplitter(int pageWidth, int pageHeight, float lineSpacingMultiplier, int lineSpacingExtra) {
this.pageWidth = pageWidth;
this.pageHeight = pageHeight;
this.lineSpacingMultiplier = lineSpacingMultiplier;
this.lineSpacingExtra = lineSpacingExtra;
}
public void append(String text, TextPaint textPaint) {
textLineHeight = (int) Math.ceil(textPaint.getFontMetrics(null) * lineSpacingMultiplier + lineSpacingExtra);
String[] paragraphs = text.split("\n", -1);
int i;
for (i = 0; i < paragraphs.length - 1; i++) {
appendText(paragraphs[i], textPaint);
appendNewLine();
}
appendText(paragraphs[i], textPaint);
}
private void appendText(String text, TextPaint textPaint) {
String[] words = text.split(" ", -1);
int i;
for (i = 0; i < words.length - 1; i++) {
appendWord(words[i] + " ", textPaint);
}
appendWord(words[i], textPaint);
}
private void appendNewLine() {
currentLine.append("\n");
checkForPageEnd();
appendLineToPage(textLineHeight);
}
private void checkForPageEnd() {
if (pageContentHeight + currentLineHeight > pageHeight) {
pages.add(currentPage);
currentPage = new SpannableStringBuilder();
pageContentHeight = 0;
}
}
private void appendWord(String appendedText, TextPaint textPaint) {
int textWidth = (int) Math.ceil(textPaint.measureText(appendedText));
if (currentLineWidth + textWidth >= pageWidth) {
checkForPageEnd();
appendLineToPage(textLineHeight);
}
appendTextToLine(appendedText, textPaint, textWidth);
}
private void appendLineToPage(int textLineHeight) {
currentPage.append(currentLine);
pageContentHeight += currentLineHeight;
currentLine = new SpannableStringBuilder();
currentLineHeight = textLineHeight;
currentLineWidth = 0;
}
private void appendTextToLine(String appendedText, TextPaint textPaint, int textWidth) {
currentLineHeight = Math.max(currentLineHeight, textLineHeight);
currentLine.append(renderToSpannable(appendedText, textPaint));
currentLineWidth += textWidth;
}
public List<CharSequence> getPages() {
List<CharSequence> copyPages = new ArrayList<CharSequence>(pages);
SpannableStringBuilder lastPage = new SpannableStringBuilder(currentPage);
if (pageContentHeight + currentLineHeight > pageHeight) {
copyPages.add(lastPage);
lastPage = new SpannableStringBuilder();
}
lastPage.append(currentLine);
copyPages.add(lastPage);
return copyPages;
}
private SpannableString renderToSpannable(String text, TextPaint textPaint) {
SpannableString spannable = new SpannableString(text);
if (textPaint.isFakeBoldText()) {
spannable.setSpan(new StyleSpan(Typeface.BOLD), 0, spannable.length(), 0);
}
return spannable;
}
**fragment transaction method
public void changeFragment(final Fragment fragment, final String fragmenttag) {
try {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction().addToBackStack(null);
fragmentTransaction.replace(R.id.fram, fragment, fragmenttag);
fragmentTransaction.commit();
fragmentTransaction.addToBackStack(null);
}
}, 50);
} catch (Exception e) {
}
}
