Java Code Examples for androidx.viewpager.widget.ViewPager#setOnPageChangeListener()

/**
     * 初始化ViewPager
     */
    private void InitViewPager() {
        mPager = (ViewPager) findViewById(R.id.vPager);
        listViews = new ArrayList<Fragment>();
/*	LayoutInflater mInflater = getLayoutInflater();
    listViews.add(mInflater.inflate(R.layout.activity_visual_viewpager_one, null));
	listViews.add(mInflater.inflate(R.layout.activity_visual_viewpager_two, null));
	listViews.add(mInflater.inflate(R.layout.activity_visual_viewpager_three, null));*/
        listViews.add(oneFragment);
        listViews.add(twoFragment);
        listViews.add(thrFragment);
        //用support包，只能用getSupportFragmentManager();
        FragmentManager fragmentManager = this.getSupportFragmentManager();
        //通过fragment适配器把fragment添加入viewpager中
        mPager.setAdapter(new VisualViewPagerAdapter(fragmentManager, listViews));
        mPager.setCurrentItem(0);
        mPager.setOnPageChangeListener(new MyOnPageChangeListener());
    }
 

@Override
public void setViewPager(ViewPager view) {
    if (mViewPager == view) {
        return;
    }
    if (mViewPager != null) {
        mViewPager.setOnPageChangeListener(null);
    }
    PagerAdapter adapter = view.getAdapter();
    if (adapter == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }
    mViewPager = view;
    view.setOnPageChangeListener(this);
    notifyDataSetChanged();
}
 

@Override
public void setViewPager(ViewPager view) {
    if (mViewPager == view) {
        return;
    }
    if (mViewPager != null) {
        mViewPager.setOnPageChangeListener(null);
    }
    final PagerAdapter adapter = view.getAdapter();
    if (adapter == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }
    mViewPager = view;
    view.setOnPageChangeListener(this);
    notifyDataSetChanged();
}
 

/**
 * Sets the associated view pager. Note that the assumption here is that the pager content
 * (number of tabs and tab titles) does not change after this call has been made.
 */
public void setViewPager(@Nullable ViewPager viewPager) {
    mTabStrip.removeAllViews();

    mViewPager = viewPager;
    if (viewPager != null) {
        viewPager.setOnPageChangeListener(new InternalViewPagerListener());
        populateTabStrip();
    }
}
 

public void setViewPager(@NonNull ViewPager pager) {
    this.pager = pager;

    if (pager.getAdapter() == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }

    pager.setOnPageChangeListener(pageListener);

    notifyDataSetChanged();
}
 

public void setViewPager(@NonNull ViewPager pager) {
    this.pager = pager;

    if (pager.getAdapter() == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }

    pager.setOnPageChangeListener(pageListener);

    notifyDataSetChanged();
}
 

/**
 * Sets the associated view pager. Note that the assumption here is that the pager content
 * (number of tabs and tab titles) does not change after this call has been made.
 */
public void setViewPager(ViewPager viewPager) {
    mTabStrip.removeAllViews();

    mViewPager = viewPager;
    if (viewPager != null) {
        viewPager.setOnPageChangeListener(new InternalViewPagerListener());
        populateTabStrip();
    }
}
 

/**
 * Sets the associated view pager. Note that the assumption here is that the pager content (number
 * of tabs and tab titles) does not change after this call has been made.
 */
public void setViewPager(ViewPager viewPager) {
  mTabStrip.removeAllViews();

  mViewPager = viewPager;
  if (viewPager != null) {
    viewPager.setOnPageChangeListener(new InternalViewPagerListener());
    populateTabStrip();
  }
}
 

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    ViewPager viewPager = (ViewPager) view.findViewById(R.id.view_pager);
    viewPager.setAdapter(new Adapter());
    viewPager.setOnPageChangeListener(this);
}
 

public void setViewPager(ViewPager pager) {
    this.pager = pager;
    if (pager.getAdapter() == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }

    pager.setOnPageChangeListener(pageListener);
    pager.getAdapter().registerDataSetObserver(adapterObserver);
    adapterObserver.setAttached(true);
    notifyDataSetChanged();
}
 

public void setViewPager(ViewPager pager) {
    this.pager = pager;
    if (pager.getAdapter() == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }
    pager.setOnPageChangeListener(pageListener);
    notifyDataSetChanged();
}
 

public void setViewPager(ViewPager pager) {
    this.pager = pager;
    if (pager.getAdapter() == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }
    pager.setOnPageChangeListener(pageListener);
    notifyDataSetChanged();
}
 

public void setUpPageListener(@NonNull final ViewPager viewPager) {
    CircularViewPagerHandler circularViewPagerHandler = new CircularViewPagerHandler(viewPager);
    viewPager.setOnPageChangeListener(circularViewPagerHandler);
}
 

@Override
protected void onFinishInflate() {
    mTabHost = (TabHost)findViewById(R.id.emoji_category_tabhost);
    mTabHost.setup();
    for (final EmojiCategory.CategoryProperties properties
            : mEmojiCategory.getShownCategories()) {
        addTab(mTabHost, properties.mCategoryId);
    }
    mTabHost.setOnTabChangedListener(this);
    final TabWidget tabWidget = mTabHost.getTabWidget();
    tabWidget.setStripEnabled(mCategoryIndicatorEnabled);
    if (mCategoryIndicatorEnabled) {
        // On TabWidget's strip, what looks like an indicator is actually a background.
        // And what looks like a background are actually left and right drawables.
        tabWidget.setBackgroundResource(mCategoryIndicatorDrawableResId);
        tabWidget.setLeftStripDrawable(mCategoryIndicatorBackgroundResId);
        tabWidget.setRightStripDrawable(mCategoryIndicatorBackgroundResId);
    }

    mEmojiPalettesAdapter = new EmojiPalettesAdapter(mEmojiCategory, this);

    mEmojiPager = (ViewPager)findViewById(R.id.emoji_keyboard_pager);
    mEmojiPager.setAdapter(mEmojiPalettesAdapter);
    mEmojiPager.setOnPageChangeListener(this);
    mEmojiPager.setOffscreenPageLimit(0);
    mEmojiPager.setPersistentDrawingCache(PERSISTENT_NO_CACHE);
    mEmojiLayoutParams.setPagerProperties(mEmojiPager);

    mEmojiCategoryPageIndicatorView =
            (EmojiCategoryPageIndicatorView)findViewById(R.id.emoji_category_page_id_view);
    mEmojiCategoryPageIndicatorView.setColors(
            mCategoryPageIndicatorColor, mCategoryPageIndicatorBackground);
    mEmojiLayoutParams.setCategoryPageIdViewProperties(mEmojiCategoryPageIndicatorView);

    setCurrentCategoryId(mEmojiCategory.getCurrentCategoryId(), true /* force */);

    final LinearLayout actionBar = (LinearLayout)findViewById(R.id.emoji_action_bar);
    mEmojiLayoutParams.setActionBarProperties(actionBar);

    // deleteKey depends only on OnTouchListener.
    mDeleteKey = (ImageButton)findViewById(R.id.emoji_keyboard_delete);
    mDeleteKey.setBackgroundResource(mFunctionalKeyBackgroundId);
    mDeleteKey.setTag(Constants.CODE_DELETE);
    mDeleteKey.setOnTouchListener(mDeleteKeyOnTouchListener);

    // {@link #mAlphabetKeyLeft}, {@link #mAlphabetKeyRight, and spaceKey depend on
    // {@link View.OnClickListener} as well as {@link View.OnTouchListener}.
    // {@link View.OnTouchListener} is used as the trigger of key-press, while
    // {@link View.OnClickListener} is used as the trigger of key-release which does not occur
    // if the event is canceled by moving off the finger from the view.
    // The text on alphabet keys are set at
    // {@link #startEmojiPalettes(String,int,float,Typeface)}.
    mAlphabetKeyLeft = (TextView)findViewById(R.id.emoji_keyboard_alphabet_left);
    mAlphabetKeyLeft.setBackgroundResource(mFunctionalKeyBackgroundId);
    mAlphabetKeyLeft.setTag(Constants.CODE_ALPHA_FROM_EMOJI);
    mAlphabetKeyLeft.setOnTouchListener(this);
    mAlphabetKeyLeft.setOnClickListener(this);
    mAlphabetKeyRight = (TextView)findViewById(R.id.emoji_keyboard_alphabet_right);
    mAlphabetKeyRight.setBackgroundResource(mFunctionalKeyBackgroundId);
    mAlphabetKeyRight.setTag(Constants.CODE_ALPHA_FROM_EMOJI);
    mAlphabetKeyRight.setOnTouchListener(this);
    mAlphabetKeyRight.setOnClickListener(this);
    mSpacebar = findViewById(R.id.emoji_keyboard_space);
    mSpacebar.setBackgroundResource(mSpacebarBackgroundId);
    mSpacebar.setTag(Constants.CODE_SPACE);
    mSpacebar.setOnTouchListener(this);
    mSpacebar.setOnClickListener(this);
    mEmojiLayoutParams.setKeyProperties(mSpacebar);
    mSpacebarIcon = findViewById(R.id.emoji_keyboard_space_icon);
}
 

public PageNumberSetter(TextView textView, ViewPager viewPager) {
    this.textView = textView;
    viewPager.setOnPageChangeListener(this);
}