Java Code Examples for androidx.recyclerview.widget.RecyclerView#setItemAnimator()

private void initializeRecyclerView() {
    // Initialize Adapter and RecyclerView
    // Use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("ViewPagerAdapter");
    mAdapter = new FlexibleAdapter<>(createList(50, 5), getActivity(), true);
    mAdapter.setAnimationOnForwardScrolling(DatabaseConfiguration.animateOnForwardScrolling);

    RecyclerView mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(new SmoothScrollLinearLayoutManager(getActivity()));
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    mAdapter.setFastScroller(fastScroller);

    // Sticky Headers
    mAdapter.setDisplayHeadersAtStartUp(true)
            .setStickyHeaders(true);
}
 

@Nullable
@Override
public View onCreateView(
    LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
  View rootView = inflater.inflate(R.layout.gallery_note_fragment, null);

  RecyclerView gallery = rootView.findViewById(R.id.gallery);
  GridLayoutManager layoutManager =
      new GridLayoutManager(
          gallery.getContext(),
          gallery.getContext().getResources().getInteger(R.integer.gallery_column_count));
  gallery.setLayoutManager(layoutManager);
  gallery.setItemAnimator(new DefaultItemAnimator());
  gallery.setAdapter(galleryAdapter);
  addButton = rootView.findViewById(R.id.btn_add);

  requestPermission();
  attachAddButton(addButton);
  actionController.attachAddButton(addButton);
  actionController.attachProgressBar(rootView.findViewById(R.id.recording_progress_bar));
  setUpTitleBar(rootView, false, R.string.action_bar_gallery, R.drawable.ic_gallery);

  return rootView;
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View myView = inflater.inflate(R.layout.simple1_fragment, container, false);
    String[] values = new String[]{"Android", "iPhone", "WindowsMobile",
        "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
        "Linux", "OS/2"};
    //setup the RecyclerView
    mRecyclerView = (RecyclerView) myView.findViewById(R.id.list);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(myContext));
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    //setup the adapter, which is myAdapter, see the code.
    mAdapter = new Simple1_myAdapter(values, R.layout.simple1_rowlayout, myContext);
    //add the adapter to the recyclerview
    mRecyclerView.setAdapter(mAdapter);
    return myView;
}
 

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment_people);

    recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    recyclerView.addItemDecoration(new DividerItemDecoration(this, R.drawable.people_feed_divider));
    recyclerView.setItemAnimator(new DefaultItemAnimator());

    Collection<String> userIds = getIntent().getStringArrayListExtra(USER_REMOTE_IDS);
    try {
        people = UserHelper.getInstance(getApplicationContext()).read(userIds);
    } catch (UserException e) {
        Log.e(LOG_NAME, "Error read users for remoteIds: " + userIds.toString(), e);
    }

    adapter = new PeopleRecyclerAdapter(this, people);
    recyclerView.setAdapter(adapter);
    adapter.setOnPersonClickListener(this);
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_options, container, false);

    prgLoading = (TSProgressBar) rootView.findViewById(R.id.options_progress);
    titleId = getResources().getStringArray(R.array.title);
    subtitleId = getResources().getStringArray(R.array.subtitle);

    userText = rootView.findViewById(R.id.user_name);
    userAvatar = rootView.findViewById(R.id.user_avatar);

    final RecyclerView mRecyclerView = rootView.findViewById(R.id.options_rv);
    mRecyclerView.setHasFixedSize(true);
    RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(AppMain.getContext());
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    mRecyclerView.setLayoutManager(mLayoutManager);
    RecyclerView.Adapter mAdapter = new OptionsAdapter(titleId, subtitleId, imageId);
    mRecyclerView.setAdapter(mAdapter);

    ImageLoader imageLoader = new ImageLoader(AppMain.getContext());

    return rootView;
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    List<String> values = Arrays.asList("Android", "iPhone", "WindowsMobile",
        "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
        "Linux", "OS/2");

    //setup the RecyclerView
    mRecyclerView = (RecyclerView) findViewById(R.id.list);

    // use this setting to improve performance if you know that changes
    // in content do not change the layout size of the RecyclerView
    mRecyclerView.setHasFixedSize(true);

    // use a linear layout manager
    mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
    //and default animator
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    //setup the adapter, which is myAdapter, see the code.
    mAdapter = new myAdapter(values, R.layout.my_row, this);
    //add the adapter to the recyclerview
    mRecyclerView.setAdapter(mAdapter);
}
 

/**
 * 配置 RecyclerView
 *
 * @param recyclerView
 * @param layoutManager
 * @deprecated Use {@link #configRecyclerView(RecyclerView, RecyclerView.LayoutManager)} instead
 */
@Deprecated
public static void configRecycleView(final RecyclerView recyclerView
        , RecyclerView.LayoutManager layoutManager) {
    recyclerView.setLayoutManager(layoutManager);
    //如果可以确定每个item的高度是固定的，设置这个选项可以提高性能
    recyclerView.setHasFixedSize(true);
    recyclerView.setItemAnimator(new DefaultItemAnimator());
}
 

@Override
public RecyclerView onCreateRecyclerView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
  RecyclerView recyclerView = super.onCreateRecyclerView(inflater, parent, savedInstanceState);
  recyclerView.setItemAnimator(null);
  recyclerView.setLayoutAnimation(null);
  return recyclerView;
}
 

@Nullable
@Override
public View onCreateView(
    LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

  View view = inflater.inflate(R.layout.fragment_manage_devices, container, false);

  RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recycler);
  HeaderAdapter myHeader = new HeaderAdapter(R.layout.device_header, R.string.my_devices);
  HeaderAdapter availableHeader =
      new HeaderAdapter(R.layout.device_header, R.string.available_devices);
  if (savedInstanceState != null) {
    myDevices.onRestoreInstanceState(savedInstanceState.getBundle(KEY_MY_DEVICES));
    availableDevices.onRestoreInstanceState(savedInstanceState.getBundle(KEY_AVAILABLE_DEVICES));
  }
  CompositeRecyclerAdapter adapter =
      new CompositeRecyclerAdapter(myHeader, myDevices, availableHeader, availableDevices);
  adapter.setHasStableIds(true);
  recyclerView.setAdapter(adapter);
  recyclerView.setLayoutManager(
      new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
  // Don't animate on change: https://code.google.com/p/android/issues/detail?id=204277.
  SimpleItemAnimator animator = new DefaultItemAnimator();
  animator.setSupportsChangeAnimations(false);
  recyclerView.setItemAnimator(animator);
  return view;
}
 

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.simple_list, container, false);

    RecyclerView recyclerView = view.findViewById(R.id.items);
    LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
    recyclerView.setLayoutManager(layoutManager);
    StorageSettingsAdapter adapter = new StorageSettingsAdapter(getActivity());
    recyclerView.setItemAnimator(null);
    recyclerView.setAdapter(adapter);

    return view;
}
 

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.activity_fragment, null);
    mRecyclerView = (RecyclerView) rootView.findViewById(R.id.activity_recycke_view);

    //设置adapter
    mRecyclerView.setAdapter(mGirlAdapter);
    //设置Item增加、移除动画
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    mRecyclerView.setHasFixedSize(false);

    //设置布局管理器
    LinearLayoutManager linearLayoutManager =
            new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false);
    mRecyclerView.setLayoutManager(linearLayoutManager);

    mCircularProgressBar = (CircularProgressBar) rootView.findViewById(R.id.circular_progressbar);

    swipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setColorSchemeColors(
            R.color.holo_red_light,
            R.color.holo_green_light,
            R.color.holo_blue_bright);

    //swipeRefreshLayout 设置下拉刷新事件
    swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            getData();
            //成功了 关闭刷新
            swipeRefreshLayout.setRefreshing(false);
        }
    });
    return rootView;
}
 

public Builder(Context context) {
    super(context);

    setCustomView(R.layout.dialog_select);
    RecyclerView recyclerView = findViewById(R.id.rv_select_list);
    recyclerView.setItemAnimator(null);

    mAdapter = new SelectAdapter(getContext());
    recyclerView.setAdapter(mAdapter);
}
 

/**
 * 配置 RecyclerView
 *
 * @param recyclerView
 * @param layoutManager
 */
public static void configRecyclerView(final RecyclerView recyclerView
        , RecyclerView.LayoutManager layoutManager) {
    recyclerView.setLayoutManager(layoutManager);
    //如果可以确定每个item的高度是固定的，设置这个选项可以提高性能
    recyclerView.setHasFixedSize(true);
    recyclerView.setItemAnimator(new DefaultItemAnimator());
}
 

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                         @Nullable Bundle savedInstanceState) {
    View view= inflater.inflate(R.layout.movie_list_fragment, container, false);
    recyclerView = (RecyclerView)view.findViewById(R.id.recycler_view);
    mAdapter = new MoviesAdapter(movieList);
    RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getContext());
    recyclerView.setLayoutManager(mLayoutManager);
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    recyclerView.setAdapter(mAdapter);
    return view;
}
 

/**
 * Disables all the {@link RecyclerView} animations.
 */
public static void disableAnimations(@NonNull RecyclerView recyclerView) {
    Preconditions.nonNull(recyclerView);

    if(recyclerView.getItemAnimator() != null) {
        recyclerView.setItemAnimator(null);
    }
}
 

@Override
public RecyclerView onCreateRecyclerView (LayoutInflater inflater, ViewGroup parent, Bundle state) {
    final RecyclerView view = super.onCreateRecyclerView(inflater, parent, state);
    view.setItemAnimator(null);
    view.setLayoutAnimation(null);
    return view;
}
 

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.layout_quick_switch);
    profilesAdapter = new ProfilesAdapter();

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setTitle(R.string.quick_switch);

    RecyclerView profilesList = (RecyclerView) findViewById(R.id.profilesList);
    LinearLayoutManager lm = new LinearLayoutManager(this);
    profilesList.setLayoutManager(lm);
    profilesList.setItemAnimator(new DefaultItemAnimator());
    profilesList.setAdapter(profilesAdapter);
    if (ShadowsocksApplication.app.profileId() >= 0) {
        int position = 0;
        List<Profile> profiles = profilesAdapter.profiles;
        for (int i = 0; i < profiles.size(); i++) {
            Profile profile = profiles.get(i);
            if (profile.id == ShadowsocksApplication.app.profileId()) {
                position = i + 1;
                break;
            }
        }
        lm.scrollToPosition(position);
    }

    if (Build.VERSION.SDK_INT >= 25) {
        ShortcutManager service = getSystemService(ShortcutManager.class);
        if (service != null) {
            service.reportShortcutUsed("switch");
        }
    }
}
 

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.layout_tasker);

    profilesAdapter = new ProfilesAdapter();

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setTitle(R.string.app_name);
    toolbar.setNavigationIcon(R.drawable.ic_navigation_close);
    toolbar.setNavigationOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            finish();
        }
    });

    taskerOption = TaskerSettings.fromIntent(getIntent());
    mSwitch = (Switch) findViewById(R.id.serviceSwitch);
    mSwitch.setChecked(taskerOption.switchOn);
    RecyclerView profilesList = (RecyclerView) findViewById(R.id.profilesList);
    LinearLayoutManager lm = new LinearLayoutManager(this);
    profilesList.setLayoutManager(lm);
    profilesList.setItemAnimator(new DefaultItemAnimator());
    profilesList.setAdapter(profilesAdapter);

    if (taskerOption.profileId >= 0) {
        int position = 0;
        List<Profile> profiles = profilesAdapter.profiles;
        for (int i = 0; i < profiles.size(); i++) {
            Profile profile = profiles.get(i);
            if (profile.id == taskerOption.profileId) {
                position = i + 1;
                break;
            }
        }
        lm.scrollToPosition(position);
    }
}
 

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

    configs = getIntent().getParcelableExtra(CONFIGS);
    if (configs == null) {
        configs = new Configurations.Builder().build();
    }

    if (getIntent().hasExtra(DIR_ID))
        dirId = getIntent().getLongExtra(DIR_ID, 0);

    if (useDocumentUi()) {
        MimeTypeMap mimeType = MimeTypeMap.getSingleton();

        String[] suffixes = configs.getSuffixes();
        String[] mime = new String[suffixes.length];
        for (int i = 0; i < suffixes.length; i++) {
            mime[i] = mimeType.getMimeTypeFromExtension(
                    suffixes[i].replace(".", "")
            );
        }

        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT)
                .setType("*/*")
                .putExtra(Intent.EXTRA_ALLOW_MULTIPLE, configs.getMaxSelection() > 1)
                .putExtra(Intent.EXTRA_MIME_TYPES, mime);
        startActivityForResult(intent, REQUEST_DOCUMENT);
        return;
    }

    setContentView(R.layout.filepicker_gallery);

    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    if (getIntent().hasExtra(DIR_TITLE))
        title = getIntent().getStringExtra(DIR_TITLE);
    else if (configs.getTitle() != null)
        title = configs.getTitle();

    if (title != null)
        title_res = R.string.selection_count_title;

    int spanCount;
    if (getResources().getConfiguration().orientation
            == Configuration.ORIENTATION_LANDSCAPE) {
        spanCount = configs.getLandscapeSpanCount();
    } else {
        spanCount = configs.getPortraitSpanCount();
    }

    int imageSize = configs.getImageSize();
    if (imageSize <= 0) {
        Point point = new Point();
        getWindowManager().getDefaultDisplay().getSize(point);
        imageSize = Math.min(point.x, point.y) / configs.getPortraitSpanCount();
    }

    boolean isSingleChoice = configs.isSingleChoiceMode();
    fileGalleryAdapter = new FileGalleryAdapter(this, imageSize,
            dirId == null && configs.isImageCaptureEnabled(),
            dirId == null && configs.isVideoCaptureEnabled());
    fileGalleryAdapter.enableSelection(true);
    fileGalleryAdapter.enableSingleClickSelection(configs.isSingleClickSelection());
    fileGalleryAdapter.setOnSelectionListener(this);
    fileGalleryAdapter.setSingleChoiceMode(isSingleChoice);
    fileGalleryAdapter.setMaxSelection(isSingleChoice ? 1 : configs.getMaxSelection());
    fileGalleryAdapter.setSelectedItems(configs.getSelectedMediaFiles());
    fileGalleryAdapter.setOnCameraClickListener(this);
    RecyclerView recyclerView = findViewById(R.id.file_gallery);
    recyclerView.setLayoutManager(new GridLayoutManager(this, spanCount) {
        @Override
        public boolean isAutoMeasureEnabled() {
            return false;
        }
    });
    recyclerView.setAdapter(fileGalleryAdapter);
    recyclerView.addItemDecoration(new DividerItemDecoration(getResources().getDimensionPixelSize(R.dimen.grid_spacing), spanCount));
    recyclerView.setItemAnimator(null);
    recyclerView.setHasFixedSize(false);
    recyclerView.setItemViewCacheSize(20);

    if (requestPermission(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_WRITE_PERMISSION)) {
        loadFiles();
    }

    maxCount = configs.getMaxSelection();
    if (maxCount > 0) {
        setTitle(getResources().getString(title_res, fileGalleryAdapter.getSelectedItemCount(), maxCount, title));
    }
}
 

@SuppressLint("InflateParams")
public SimpleMenuPopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);

    setFocusable(true);
    setOutsideTouchable(false);

    TypedArray a = context.obtainStyledAttributes(
            attrs, R.styleable.SimpleMenuPopup, defStyleAttr, defStyleRes);

    elevation[POPUP_MENU] = (int) a.getDimension(R.styleable.SimpleMenuPopup_listElevation, 4f);
    elevation[DIALOG] = (int) a.getDimension(R.styleable.SimpleMenuPopup_dialogElevation, 48f);
    margin[POPUP_MENU][HORIZONTAL] = (int) a.getDimension(R.styleable.SimpleMenuPopup_listMarginHorizontal, 0);
    margin[POPUP_MENU][VERTICAL] = (int) a.getDimension(R.styleable.SimpleMenuPopup_listMarginVertical, 0);
    margin[DIALOG][HORIZONTAL] = (int) a.getDimension(R.styleable.SimpleMenuPopup_dialogMarginHorizontal, 0);
    margin[DIALOG][VERTICAL] = (int) a.getDimension(R.styleable.SimpleMenuPopup_dialogMarginVertical, 0);
    listPadding[POPUP_MENU][HORIZONTAL] = (int) a.getDimension(R.styleable.SimpleMenuPopup_listItemPadding, 0);
    listPadding[DIALOG][HORIZONTAL] = (int) a.getDimension(R.styleable.SimpleMenuPopup_dialogItemPadding, 0);
    dialogMaxWidth = (int) a.getDimension(R.styleable.SimpleMenuPopup_dialogMaxWidth, 0);
    unit = (int) a.getDimension(R.styleable.SimpleMenuPopup_unit, 0);
    maxUnits = a.getInteger(R.styleable.SimpleMenuPopup_maxUnits, 0);

    mList = (RecyclerView) LayoutInflater.from(context).inflate(R.layout.simple_menu_list, null);
    mList.setFocusable(true);
    mList.setLayoutManager(new LinearLayoutManager(context));
    mList.setItemAnimator(null);
    mList.setOutlineProvider(new ViewOutlineProvider() {
        @Override
        public void getOutline(View view, Outline outline) {
            getBackground().getOutline(outline);
        }
    });
    mList.setClipToOutline(true);

    setContentView(mList);

    mAdapter = new SimpleMenuListAdapter(this);
    mList.setAdapter(mAdapter);

    a.recycle();

    // TODO do not hardcode
    itemHeight = Math.round(context.getResources().getDisplayMetrics().density * 48);
    listPadding[POPUP_MENU][VERTICAL] = listPadding[DIALOG][VERTICAL] = Math.round(context.getResources().getDisplayMetrics().density * 8);
}