androidx.fragment.app.FragmentPagerAdapter Java Examples

private void initFragment() {
    baseFragments = new BaseFragment[]{
            new FragmentLeft(),
            new FragmentCenter(),
            new FragmentRight()
    };
    baseBind.viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
        @Override
        public Fragment getItem(int i) {
            return baseFragments[i];
        }

        @Override
        public int getCount() {
            return baseFragments.length;
        }
    });
    baseBind.navigationView.setupWithViewPager(baseBind.viewPager);
}
 

private void initView() {
    mFragments.clear();
    mFragments.add(new HealthFragmentChild0());
    mFragments.add(new HealthFragmentChild1());
    mHomeTitleBar = findViewById(R.id.title_bar);
    mHomeTitleBar.setListener(new HomeTitleBar.OnTitleBarClickListener() {
        @Override
        public void onRightClick() {
            finish();
        }
    });
    mVerticalViewPager = findViewById(R.id.view_pager);
    mFragmentPagerAdapter = new FragmentPagerAdapter(getChildFragmentManager()) {
        @Override
        public Fragment getItem(int position) {
            return mFragments.get(position);
        }

        @Override
        public int getCount() {
            return mFragments.size();
        }
    };
    mVerticalViewPager.setAdapter(mFragmentPagerAdapter);
}
 

@Override
public void initView(View view) {
    baseBind.viewPager.setAdapter(new FragmentPagerAdapter(getChildFragmentManager()) {
        @NonNull
        @Override
        public Fragment getItem(int position) {
            return FragmentColor.newInstance(COLORS[position]);
        }

        @Override
        public int getCount() {
            return COLORS.length;
        }
    });
}
 

@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
    int realFirst = getRealFirstPosition();
    int realLast = getRealLastPosition();
    int realPosition = (mAdapter instanceof FragmentPagerAdapter
            || mAdapter instanceof FragmentStatePagerAdapter) ? position
            : toRealPosition(position);

    if (mBoundaryCaching && (position == realFirst || position == realLast)) {
        mToDestroy.put(position, new ToDestroy(container, realPosition, object));
    } else {
        mAdapter.destroyItem(container, realPosition, object);
    }
}
 

@NonNull @Override public Object instantiateItem(@NonNull ViewGroup container, int position) {
    int realPosition = (mAdapter instanceof FragmentPagerAdapter
            || mAdapter instanceof FragmentStatePagerAdapter) ? position
            : toRealPosition(position);

    if (mBoundaryCaching) {
        ToDestroy toDestroy = mToDestroy.get(position);
        if (toDestroy != null) {
            mToDestroy.remove(position);
            return toDestroy.object;
        }
    }
    return mAdapter.instantiateItem(container, realPosition);
}
 

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
	int realFirst = getRealFirstPosition();
	int realLast = getRealLastPosition();
	int realPosition = (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter) ? position
			: toRealPosition(position);

	if (mBoundaryCaching && (position == realFirst || position == realLast)) {
		mToDestroy.put(position, new ToDestroy(container, realPosition, object));
	} else {
		mAdapter.destroyItem(container, realPosition, object);
	}
}
 

@Override
public Object instantiateItem(ViewGroup container, int position) {
	int realPosition = (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter) ? position
			: toRealPosition(position);

	if (mBoundaryCaching) {
		ToDestroy toDestroy = mToDestroy.get(position);
		if (toDestroy != null) {
			mToDestroy.remove(position);
			return toDestroy.object;
		}
	}
	return mAdapter.instantiateItem(container, realPosition);
}
 

private void initViewPager() {
    viewPager = findViewById(R.id.viewPager);
    final Fragment[] fragments = new Fragment[]{
            MeterFragment.newInstance(),
            WidgetFragment.newInstance(),
            ButtonPlainFragment.newInstance(),
            ButtonFillFragment.newInstance(),
            ButtonOutlineFragment.newInstance(),
            MessageBoxFragment.newInstance(),
            ProgressBarFragment.newInstance(),
    };
    viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
        @Override
        public Fragment getItem(int position) {
            if (position<fragments.length)
                return fragments[position];
            else
                return new Fragment();
        }

        @Override
        public int getCount() {
            return tabLayout.getTabCount();
        }
    });

    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_viewpager);

    viewPager = findViewById(R.id.view_pager);

    viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
        @Override
        public Fragment getItem(int position) {
            switch (position) {
                case 0:
                    return FirstFragment.newInstance();
                case 1:
                    return SecondFragment.newInstance();
                default:
                    throw new RuntimeException("Invalid item index.");
            }
        }

        @Override
        public int getCount() {
            return 2;
        }
    });
}
 

@Override
public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {

    // Set animations
    Dialog dialog = getDialog();
    if (dialog != null) {
        //dialog.setTitle(R.string.imagetransfer_resolution_choose);
        //dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        Window window = dialog.getWindow();
        if (window != null) {
            window.setWindowAnimations(R.style.DialogAnimation);
        }
    }

    // Configure tabs and viewpager
    ViewPager viewPager = view.findViewById(R.id.viewpager);
    ResolutionsPageAdapter adapter = new ResolutionsPageAdapter(getChildFragmentManager(), FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT, mResolution);
    viewPager.setAdapter(adapter);

    TabLayout tabLayout = view.findViewById(R.id.tabLayout);
    tabLayout.setupWithViewPager(viewPager);

    // Force titles
    TabLayout.Tab standardResolutions = tabLayout.getTabAt(0);
    if (standardResolutions != null) {
        standardResolutions.setText(R.string.imagetransfer_resolution_mode_standard);
    }
    TabLayout.Tab eInkResolutions = tabLayout.getTabAt(1);
    if (eInkResolutions != null) {
        eInkResolutions.setText(R.string.imagetransfer_resolution_mode_eink);
    }

    // Set initial item
    viewPager.setCurrentItem(mIsEInkModeEnabled ? 1 : 0);
}
 

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.tab_advanced_installer, container, false);
    ViewPager mPager = view.findViewById(R.id.pager);
    mTabLayout = view.findViewById(R.id.tab_layout);

    tabsAdapter = new TabsAdapter(getChildFragmentManager(), FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
    mPager.setAdapter(tabsAdapter);
    mTabLayout.setupWithViewPager(mPager);

    setHasOptionsMenu(true);
    new JSONParser().execute();

    if (!XposedApp.getPreferences().getBoolean("hide_install_warning", false)) {
        @SuppressLint("InflateParams") final View dontShowAgainView = inflater.inflate(R.layout.dialog_install_warning, null);

        new MaterialDialog.Builder(requireActivity())
                .title(R.string.install_warning_title)
                .customView(dontShowAgainView, false)
                .positiveText(R.string.ok)
                .onPositive((dialog, which) -> {
                    CheckBox checkBox = dontShowAgainView.findViewById(android.R.id.checkbox);
                    if (checkBox.isChecked())
                        XposedApp.getPreferences().edit().putBoolean("hide_install_warning", true).apply();
                })
                .cancelable(false).show();
    }

    return view;
}
 

@Override
void initData() {
    if (Dev.isDev) {

    } else {
        Retro.getAppApi().getLoginBg(Shaft.sUserModel.getResponse().getAccess_token())
                .subscribeOn(Schedulers.newThread())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new NullCtrl<ListIllust>() {
                    @Override
                    public void success(ListIllust listIllust) {
                        baseBind.viewPager.setAdapter(new FragmentPagerAdapter(getChildFragmentManager()) {
                            @NonNull
                            @Override
                            public Fragment getItem(int position) {
                                int index = position % listIllust.getList().size();
                                return FragmentImage.newInstance(listIllust.getIllusts()
                                        .get(index));
                            }

                            @Override
                            public int getCount() {
                                return Integer.MAX_VALUE;
                            }
                        });
                        baseBind.viewPager.setPageTransformer(true, new GalleryTransformer());
                        baseBind.viewPager.setOffscreenPageLimit(3);
                        baseBind.viewPager.setCurrentItem(listIllust.getList().size());
                    }
                });
    }
}
 

@Override
public void initView(View view) {
    String[] TITLES = new String[]{
            Shaft.getContext().getString(R.string.recommend_illust),
            Shaft.getContext().getString(R.string.hot_tag)
    };

    ViewGroup.LayoutParams headParams = baseBind.head.getLayoutParams();
    headParams.height = Shaft.statusHeight;
    baseBind.head.setLayoutParams(headParams);

    baseBind.toolbar.setNavigationOnClickListener(v -> {
        mActivity.finish();
    });
    baseBind.toolbar.inflateMenu(R.menu.fragment_left);
    baseBind.toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
        @Override
        public boolean onMenuItemClick(MenuItem item) {
            if (item.getItemId() == R.id.action_search) {
                Intent intent = new Intent(mContext, TemplateActivity.class);
                intent.putExtra(TemplateActivity.EXTRA_FRAGMENT, "搜索");
                startActivity(intent);
                return true;
            }
            return false;
        }
    });
    baseBind.viewPager.setAdapter(new FragmentPagerAdapter(getChildFragmentManager(), 0) {
        @NonNull
        @Override
        public Fragment getItem(int i) {
            if (i == 0) {
                return new FragmentRecmdNovel();
            } else {
                return FragmentHotTag.newInstance(Params.TYPE_NOVEL);
            }
        }

        @Override
        public int getCount() {
            return TITLES.length;
        }

        @NonNull
        @Override
        public CharSequence getPageTitle(int position) {
            return TITLES[position];
        }
    });
    baseBind.tabLayout.setupWithViewPager(baseBind.viewPager);
}
 

public SectionsPagerAdapter(@NonNull FragmentManager fm) {
    super(fm, FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
}
 

@Override
public void initView(View view) {
    String[] TITLES = new String[]{
            Shaft.getContext().getString(R.string.recommend_illust),
            Shaft.getContext().getString(R.string.hot_tag)
    };

    ViewGroup.LayoutParams headParams = baseBind.head.getLayoutParams();
    headParams.height = Shaft.statusHeight;
    baseBind.head.setLayoutParams(headParams);

    baseBind.toolbar.setNavigationOnClickListener(v -> {
        if (requireActivity() instanceof MainActivity) {
            ((MainActivity) requireActivity()).getDrawer().openDrawer(Gravity.START);
        }
    });
    baseBind.toolbar.inflateMenu(R.menu.fragment_left);
    baseBind.toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
        @Override
        public boolean onMenuItemClick(MenuItem item) {
            if (item.getItemId() == R.id.action_search) {
                Intent intent = new Intent(mContext, TemplateActivity.class);
                intent.putExtra(TemplateActivity.EXTRA_FRAGMENT, "搜索");
                startActivity(intent);
                return true;
            }
            return false;
        }
    });
    baseBind.viewPager.setAdapter(new FragmentPagerAdapter(getChildFragmentManager(), 0) {
        @NonNull
        @Override
        public Fragment getItem(int i) {
            if (i == 0) {
                return FragmentRecmdIllust.newInstance("插画");
            } else {
                return FragmentHotTag.newInstance(Params.TYPE_ILLUST);
            }
        }

        @Override
        public int getCount() {
            return TITLES.length;
        }

        @NonNull
        @Override
        public CharSequence getPageTitle(int position) {
            return TITLES[position];
        }
    });
    baseBind.tabLayout.setupWithViewPager(baseBind.viewPager);
}
 

public MyAdapter(FragmentManager fm) {
    super(fm, FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
}
 

public PolylineControlFragmentPagerAdapter(FragmentManager fragmentManager, boolean isLiteMode) {
    super(fragmentManager, FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
    positionsToFragments = new HashMap<>();
    this.isLiteMode = isLiteMode;
}
 

@Bindable
public FragmentPagerAdapter getPagerAdapter() {
    notifyPropertyChanged(BR.page);
    return mPagerAdapter;
}
 

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    IntroFragment frag = (IntroFragment) ((FragmentPagerAdapter) getAdapter()).getItem(getCurrentItem());
    if (frag.allowTouch()) return super.onInterceptTouchEvent(ev);
    return true;
}
 

private RTLAdapterWrapper(FragmentManager fm, @NonNull FragmentPagerAdapter adapter) {
    super(fm);
    this.adapter = adapter;
    adapter.registerDataSetObserver(observer);
}
 

public void setRTLSupportAdapter(FragmentManager fm, @NonNull FragmentPagerAdapter adapter) {
    super.setAdapter(isRTL() ? new RTLAdapterWrapper(fm, adapter) : adapter);
}
 

public static FragmentPagerAdapter getFragmentPagerAdapter() {
    return pagerAdapter;
}
 

public static FragmentPagerAdapter getFragmentPagerAdapter() {
    return pagerAdapter;
}
 

public SectionsPagerAdapter(Context context, FragmentManager fm)
{
    super(fm, FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
    mContext = context;
}
 

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    IntroFragment frag = (IntroFragment) ((FragmentPagerAdapter) getAdapter()).getItem(getCurrentItem());
    if (frag.allowTouch()) return super.onInterceptTouchEvent(ev);
    return true;
}
 

private RTLAdapterWrapper(FragmentManager fm, @NonNull FragmentPagerAdapter adapter) {
    super(fm);
    this.adapter = adapter;
    adapter.registerDataSetObserver(observer);
}
 

public void setRTLSupportAdapter(FragmentManager fm, @NonNull FragmentPagerAdapter adapter) {
    super.setAdapter(isRTL() ? new RTLAdapterWrapper(fm, adapter) : adapter);
}
 

PagerAdapter(@NonNull FragmentManager fm, String[] titles) {
    super(fm, FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
    this.titles = titles;
}
 

@SafeVarargs
public PagerAdapter(FragmentManager fm, F... fragments) {
    super(fm, FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
    this.fragments = Arrays.asList(fragments);
}
 

public PagerAdapter(FragmentManager fm, List<F> fragments) {
    super(fm, FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
    this.fragments = fragments;
}