Example usage for android.content Context ACCESSIBILITY_SERVICE

List of usage examples for android.content Context ACCESSIBILITY_SERVICE

  1. HOME
  2. Java
  3. android
  4. android.content.*
  5. Context
  6. ACCESSIBILITY_SERVICE

Introduction

In this page you can find the example usage for android.content Context ACCESSIBILITY_SERVICE.

Prototype

String ACCESSIBILITY_SERVICE

To view the source code for android.content Context ACCESSIBILITY_SERVICE.

Click Source Link

Document

Use with #getSystemService(String) to retrieve a android.view.accessibility.AccessibilityManager for giving the user feedback for UI events through the registered event listeners.

Usage

From source file:cc.flydev.launcher.Page.java

protected boolean computeScrollHelper() {
    if (mScroller.computeScrollOffset()) {
        // Don't bother scrolling if the page does not need to be moved
        if (getScrollX() != mScroller.getCurrX() || getScrollY() != mScroller.getCurrY()
                || mOverScrollX != mScroller.getCurrX()) {
            float scaleX = mFreeScroll ? getScaleX() : 1f;
            int scrollX = (int) (mScroller.getCurrX() * (1 / scaleX));
            scrollTo(scrollX, mScroller.getCurrY());
        }/*from   ww  w. jav a 2s. co  m*/
        invalidate();
        return true;
    } else if (mNextPage != INVALID_PAGE) {
        sendScrollAccessibilityEvent();

        mCurrentPage = Math.max(0, Math.min(mNextPage, getPageCount() - 1));
        mNextPage = INVALID_PAGE;
        notifyPageSwitchListener();

        // Load the associated pages if necessary
        if (mDeferLoadAssociatedPagesUntilScrollCompletes) {
            loadAssociatedPages(mCurrentPage);
            mDeferLoadAssociatedPagesUntilScrollCompletes = false;
        }

        // We don't want to trigger a page end moving unless the page has settled
        // and the user has stopped scrolling
        if (mTouchState == TOUCH_STATE_REST) {
            pageEndMoving();
        }

        onPostReorderingAnimationCompleted();
        AccessibilityManager am = (AccessibilityManager) getContext()
                .getSystemService(Context.ACCESSIBILITY_SERVICE);
        if (am.isEnabled()) {
            // Notify the user when the page changes
            announceForAccessibility(getCurrentPageDescription());
        }
        return true;
    }
    return false;
}

From source file:com.goftagram.telegram.messenger.support.widget.RecyclerView.java

public RecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setScrollContainer(true);/*from  w ww  . j av a  2 s .c om*/
    setFocusableInTouchMode(true);
    final int version = Build.VERSION.SDK_INT;
    mPostUpdatesOnAnimation = version >= 16;

    final ViewConfiguration vc = ViewConfiguration.get(context);
    mTouchSlop = vc.getScaledTouchSlop();
    mMinFlingVelocity = vc.getScaledMinimumFlingVelocity();
    mMaxFlingVelocity = vc.getScaledMaximumFlingVelocity();
    setWillNotDraw(ViewCompat.getOverScrollMode(this) == ViewCompat.OVER_SCROLL_NEVER);

    mItemAnimator.setListener(mItemAnimatorListener);
    initAdapterManager();
    initChildrenHelper();
    // If not explicitly specified this view is important for accessibility.
    if (ViewCompat.getImportantForAccessibility(this) == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
    mAccessibilityManager = (AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    setAccessibilityDelegateCompat(new RecyclerViewAccessibilityDelegate(this));

    mScrollingChildHelper = new NestedScrollingChildHelper(this);
    setNestedScrollingEnabled(true);
}

From source file:com.n2hsu.launcher.Page.java

protected boolean computeScrollHelper() {
    if (mScroller.computeScrollOffset()) {
        // Don't bother scrolling if the page does not need to be moved
        if (getScrollX() != mScroller.getCurrX() || getScrollY() != mScroller.getCurrY()
                || mOverScrollX != mScroller.getCurrX()) {
            float scaleX = mFreeScroll ? getScaleX() : 1f;
            int scrollX = (int) (mScroller.getCurrX() * (1 / scaleX));
            scrollTo(scrollX, mScroller.getCurrY());
        }//from   w  w  w. ja  v  a  2 s .c o  m
        invalidate();
        return true;
    } else if (mNextPage != INVALID_PAGE) {
        sendScrollAccessibilityEvent();

        mCurrentPage = Math.max(0, Math.min(mNextPage, getPageCount() - 1));
        mNextPage = INVALID_PAGE;
        notifyPageSwitchListener();

        // Load the associated pages if necessary
        if (mDeferLoadAssociatedPagesUntilScrollCompletes) {
            loadAssociatedPages(mCurrentPage);
            mDeferLoadAssociatedPagesUntilScrollCompletes = false;
        }

        // We don't want to trigger a page end moving unless the page has
        // settled
        // and the user has stopped scrolling
        if (mTouchState == TOUCH_STATE_REST) {
            pageEndMoving();
        }

        onPostReorderingAnimationCompleted();
        AccessibilityManager am = (AccessibilityManager) getContext()
                .getSystemService(Context.ACCESSIBILITY_SERVICE);
        if (am.isEnabled()) {
            // Notify the user when the page changes
            announceForAccessibility(getCurrentPageDescription());
        }
        return true;
    }
    return false;
}

From source file:ngo.music.soundcloudplayer.controller.SongController.java

/**
 * Write stack played song for play previous OfflineSong
 * /*  w  w w.  j av  a 2s.  com*/
 * @param stackSongplayed
 * @param jsonWriter
 * @param currentTIme
 * @throws IOException
 */
public void storePlayingSong() throws IOException {
    // TODO Auto-generated method stub
    OfflineSong song = (OfflineSong) MusicPlayerService.getInstance().getCurrentSong();
    long curTime = MusicPlayerService.getInstance().getCurrentTime();
    ArrayList<Song> queue = MusicPlayerService.getInstance().getQueue();
    File file = new File(MusicPlayerService.getInstance().getApplicationContext()
            .getExternalFilesDir(Context.ACCESSIBILITY_SERVICE), filename);

    file.createNewFile();

    FileOutputStream fileOutputStream = new FileOutputStream(file);
    OutputStreamWriter fileWriter = new OutputStreamWriter(fileOutputStream);
    JsonWriter jsonWriter = new JsonWriter(fileWriter);
    writePlayedSongs(song, queue, jsonWriter, curTime);
    jsonWriter.close();
}

From source file:cn.ismartv.recyclerview.widget.RecyclerView.java

public RecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setScrollContainer(true);/*from w  ww . ja v  a 2  s. co m*/
    setFocusableInTouchMode(true);
    final int version = Build.VERSION.SDK_INT;
    mPostUpdatesOnAnimation = version >= 16;

    final ViewConfiguration vc = ViewConfiguration.get(context);
    mTouchSlop = vc.getScaledTouchSlop();
    mMinFlingVelocity = vc.getScaledMinimumFlingVelocity();
    mMaxFlingVelocity = vc.getScaledMaximumFlingVelocity();
    setWillNotDraw(ViewCompat.getOverScrollMode(this) == ViewCompat.OVER_SCROLL_NEVER);

    mItemAnimator.setListener(mItemAnimatorListener);
    initAdapterManager();
    initChildrenHelper();
    // If not explicitly specified this view is important for accessibility.
    if (ViewCompat.getImportantForAccessibility(this) == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
    mAccessibilityManager = (AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    setAccessibilityDelegateCompat(new RecyclerViewAccessibilityDelegate(this));
    // Create the layoutManager if specified.
    if (attrs != null) {
        int defStyleRes = 0;
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RecyclerView, defStyle, defStyleRes);
        String layoutManagerName = a.getString(R.styleable.RecyclerView_layoutManager);
        a.recycle();
        createLayoutManager(context, layoutManagerName, attrs, defStyle, defStyleRes);
    }

    mScrollingChildHelper = new NestedScrollingChildHelper(this);
    setNestedScrollingEnabled(true);
}

From source file:com.wb.launcher3.Page.java

protected boolean computeScrollHelper() {
    if (mScroller.computeScrollOffset()) {
        // Don't bother scrolling if the page does not need to be moved
        if (getScrollX() != mScroller.getCurrX() || getScrollY() != mScroller.getCurrY()
                || mOverScrollX != mScroller.getCurrX()) {
            float scaleX = mFreeScroll ? getScaleX() : 1f;
            int scrollX = (int) (mScroller.getCurrX() * (1 / scaleX));
            scrollTo(scrollX, mScroller.getCurrY());
        }/*w ww  . ja v  a 2s . co m*/
        invalidate();
        return true;
    } else if (mNextPage != INVALID_PAGE) {
        sendScrollAccessibilityEvent();

        mCurrentPage = Math.max(0, Math.min(mNextPage, getPageCount() - 1));
        mNextPage = INVALID_PAGE;

        //*/Added by tyd Greg 2014-03-20,for transition effect
        if (TydtechConfig.CYCLE_ROLL_PAGES_ENABLED && m_isCycleSnaped) {
            updateCurrentPageScroll();
            m_isScrollWallpaper = false;
            m_isCycleSnaped = false;
        }
        //*/

        notifyPageSwitchListener();

        // Load the associated pages if necessary
        if (mDeferLoadAssociatedPagesUntilScrollCompletes) {
            loadAssociatedPages(mCurrentPage);
            mDeferLoadAssociatedPagesUntilScrollCompletes = false;
        }

        // We don't want to trigger a page end moving unless the page has settled
        // and the user has stopped scrolling
        if (mTouchState == TOUCH_STATE_REST) {
            pageEndMoving();
        }

        onPostReorderingAnimationCompleted();
        AccessibilityManager am = (AccessibilityManager) getContext()
                .getSystemService(Context.ACCESSIBILITY_SERVICE);
        if (am.isEnabled()) {
            // Notify the user when the page changes
            announceForAccessibility(getCurrentPageDescription());
        }
        return true;
    }
    return false;
}

From source file:com.b44t.messenger.support.widget.RecyclerView.java

public RecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setScrollContainer(true);/*from   w  w w. j av  a 2  s  . c om*/
    setFocusableInTouchMode(true);
    final int version = Build.VERSION.SDK_INT;
    mPostUpdatesOnAnimation = version >= 16;

    final ViewConfiguration vc = ViewConfiguration.get(context);
    mTouchSlop = vc.getScaledTouchSlop();
    mMinFlingVelocity = vc.getScaledMinimumFlingVelocity();
    mMaxFlingVelocity = vc.getScaledMaximumFlingVelocity();
    setWillNotDraw(ViewCompat.getOverScrollMode(this) == ViewCompat.OVER_SCROLL_NEVER);

    mItemAnimator.setListener(mItemAnimatorListener);
    initAdapterManager();
    initChildrenHelper();
    // If not explicitly specified this view is important for accessibility.
    if (ViewCompat.getImportantForAccessibility(this) == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
    mAccessibilityManager = (AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    setAccessibilityDelegateCompat(new RecyclerViewAccessibilityDelegate(this));
    // Create the layoutManager if specified.

    // Re-set whether nested scrolling is enabled so that it is set on all API levels
    setNestedScrollingEnabled(true);
}

From source file:com.android.tv.MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    if (DEBUG)//from   w w w.ja  v  a 2 s.  co m
        Log.d(TAG, "onCreate()");
    super.onCreate(savedInstanceState);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M && !PermissionUtils.hasAccessAllEpg(this)) {
        Toast.makeText(this, R.string.msg_not_supported_device, Toast.LENGTH_LONG).show();
        finish();
        return;
    }
    boolean skipToShowOnboarding = getIntent().getAction() == Intent.ACTION_VIEW
            && TvContract.isChannelUriForPassthroughInput(getIntent().getData());
    if (Features.ONBOARDING_EXPERIENCE.isEnabled(this) && OnboardingUtils.needToShowOnboarding(this)
            && !skipToShowOnboarding && !TvCommonUtils.isRunningInTest()) {
        // TODO: The onboarding is turned off in test, because tests are broken by the
        // onboarding. We need to enable the feature for tests later.
        startActivity(OnboardingActivity.buildIntent(this, getIntent()));
        finish();
        return;
    }

    TvApplication tvApplication = (TvApplication) getApplication();
    tvApplication.getMainActivityWrapper().onMainActivityCreated(this);
    if (BuildConfig.ENG && SystemProperties.ALLOW_STRICT_MODE.getValue()) {
        Toast.makeText(this, "Using Strict Mode for eng builds", Toast.LENGTH_SHORT).show();
    }
    mTracker = tvApplication.getTracker();
    mTvInputManagerHelper = tvApplication.getTvInputManagerHelper();
    mTvInputManagerHelper.addCallback(mTvInputCallback);
    mUsbTunerInputId = UsbTunerTvInputService.getInputId(this);
    mChannelDataManager = tvApplication.getChannelDataManager();
    mProgramDataManager = tvApplication.getProgramDataManager();
    mProgramDataManager.addOnCurrentProgramUpdatedListener(Channel.INVALID_ID,
            mOnCurrentProgramUpdatedListener);
    mProgramDataManager.setPrefetchEnabled(true);
    mChannelTuner = new ChannelTuner(mChannelDataManager, mTvInputManagerHelper);
    mChannelTuner.addListener(mChannelTunerListener);
    mChannelTuner.start();
    mPipInputManager = new PipInputManager(this, mTvInputManagerHelper, mChannelTuner);
    mPipInputManager.start();
    mMemoryManageables.add(mProgramDataManager);
    mMemoryManageables.add(ImageCache.getInstance());
    mMemoryManageables.add(TvContentRatingCache.getInstance());
    if (CommonFeatures.DVR.isEnabled(this) && BuildCompat.isAtLeastN()) {
        mDvrManager = tvApplication.getDvrManager();
        mDvrDataManager = tvApplication.getDvrDataManager();
    }

    DisplayManager displayManager = (DisplayManager) getSystemService(Context.DISPLAY_SERVICE);
    Display display = displayManager.getDisplay(Display.DEFAULT_DISPLAY);
    Point size = new Point();
    display.getSize(size);
    int screenWidth = size.x;
    int screenHeight = size.y;
    mDefaultRefreshRate = display.getRefreshRate();

    mOverlayRootView = (OverlayRootView) getLayoutInflater().inflate(R.layout.overlay_root_view, null, false);
    setContentView(R.layout.activity_tv);
    mTvView = (TunableTvView) findViewById(R.id.main_tunable_tv_view);
    int shrunkenTvViewHeight = getResources().getDimensionPixelSize(R.dimen.shrunken_tvview_height);
    mTvView.initialize((AppLayerTvView) findViewById(R.id.main_tv_view), false, screenHeight,
            shrunkenTvViewHeight);
    mTvView.setOnUnhandledInputEventListener(new OnUnhandledInputEventListener() {
        @Override
        public boolean onUnhandledInputEvent(InputEvent event) {
            if (isKeyEventBlocked()) {
                return true;
            }
            if (event instanceof KeyEvent) {
                KeyEvent keyEvent = (KeyEvent) event;
                if (keyEvent.getAction() == KeyEvent.ACTION_DOWN && keyEvent.isLongPress()) {
                    if (onKeyLongPress(keyEvent.getKeyCode(), keyEvent)) {
                        return true;
                    }
                }
                if (keyEvent.getAction() == KeyEvent.ACTION_UP) {
                    return onKeyUp(keyEvent.getKeyCode(), keyEvent);
                } else if (keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
                    return onKeyDown(keyEvent.getKeyCode(), keyEvent);
                }
            }
            return false;
        }
    });
    mTimeShiftManager = new TimeShiftManager(this, mTvView, mProgramDataManager, mTracker,
            new OnCurrentProgramUpdatedListener() {
                @Override
                public void onCurrentProgramUpdated(long channelId, Program program) {
                    updateMediaSession();
                    switch (mTimeShiftManager.getLastActionId()) {
                    case TimeShiftManager.TIME_SHIFT_ACTION_ID_REWIND:
                    case TimeShiftManager.TIME_SHIFT_ACTION_ID_FAST_FORWARD:
                    case TimeShiftManager.TIME_SHIFT_ACTION_ID_JUMP_TO_PREVIOUS:
                    case TimeShiftManager.TIME_SHIFT_ACTION_ID_JUMP_TO_NEXT:
                        updateChannelBannerAndShowIfNeeded(UPDATE_CHANNEL_BANNER_REASON_FORCE_SHOW);
                        break;
                    default:
                        updateChannelBannerAndShowIfNeeded(UPDATE_CHANNEL_BANNER_REASON_UPDATE_INFO);
                        break;
                    }
                }
            });

    mPipView = (TunableTvView) findViewById(R.id.pip_tunable_tv_view);
    mPipView.initialize((AppLayerTvView) findViewById(R.id.pip_tv_view), true, screenHeight,
            shrunkenTvViewHeight);

    if (!PermissionUtils.hasAccessWatchedHistory(this)) {
        WatchedHistoryManager watchedHistoryManager = new WatchedHistoryManager(getApplicationContext());
        watchedHistoryManager.start();
        mTvView.setWatchedHistoryManager(watchedHistoryManager);
    }
    mTvViewUiManager = new TvViewUiManager(this, mTvView, mPipView,
            (FrameLayout) findViewById(android.R.id.content), mTvOptionsManager);

    mPipView.setFixedSurfaceSize(screenWidth / 2, screenHeight / 2);
    mPipView.setBlockScreenType(TunableTvView.BLOCK_SCREEN_TYPE_SHRUNKEN_TV_VIEW);

    ViewGroup sceneContainer = (ViewGroup) findViewById(R.id.scene_container);
    mChannelBannerView = (ChannelBannerView) getLayoutInflater().inflate(R.layout.channel_banner,
            sceneContainer, false);
    mKeypadChannelSwitchView = (KeypadChannelSwitchView) getLayoutInflater()
            .inflate(R.layout.keypad_channel_switch, sceneContainer, false);
    InputBannerView inputBannerView = (InputBannerView) getLayoutInflater().inflate(R.layout.input_banner,
            sceneContainer, false);
    SelectInputView selectInputView = (SelectInputView) getLayoutInflater().inflate(R.layout.select_input,
            sceneContainer, false);
    selectInputView.setOnInputSelectedCallback(new OnInputSelectedCallback() {
        @Override
        public void onTunerInputSelected() {
            Channel currentChannel = mChannelTuner.getCurrentChannel();
            if (currentChannel != null && !currentChannel.isPassthrough()) {
                hideOverlays();
            } else {
                tuneToLastWatchedChannelForTunerInput();
            }
        }

        @Override
        public void onPassthroughInputSelected(TvInputInfo input) {
            Channel currentChannel = mChannelTuner.getCurrentChannel();
            String currentInputId = currentChannel == null ? null : currentChannel.getInputId();
            if (TextUtils.equals(input.getId(), currentInputId)) {
                hideOverlays();
            } else {
                tuneToChannel(Channel.createPassthroughChannel(input.getId()));
            }
        }

        private void hideOverlays() {
            getOverlayManager().hideOverlays(TvOverlayManager.FLAG_HIDE_OVERLAYS_KEEP_DIALOG
                    | TvOverlayManager.FLAG_HIDE_OVERLAYS_KEEP_SIDE_PANELS
                    | TvOverlayManager.FLAG_HIDE_OVERLAYS_KEEP_PROGRAM_GUIDE
                    | TvOverlayManager.FLAG_HIDE_OVERLAYS_KEEP_MENU
                    | TvOverlayManager.FLAG_HIDE_OVERLAYS_KEEP_FRAGMENT);
        }
    });
    mSearchFragment = new ProgramGuideSearchFragment();
    mOverlayManager = new TvOverlayManager(this, mChannelTuner, mKeypadChannelSwitchView, mChannelBannerView,
            inputBannerView, selectInputView, sceneContainer, mSearchFragment);

    mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
    mAudioFocusStatus = AudioManager.AUDIOFOCUS_LOSS;

    mMediaSession = new MediaSession(this, MEDIA_SESSION_TAG);
    mMediaSession.setCallback(new MediaSession.Callback() {
        @Override
        public boolean onMediaButtonEvent(Intent mediaButtonIntent) {
            // Consume the media button event here. Should not send it to other apps.
            return true;
        }
    });
    mMediaSession
            .setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS | MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);
    mNowPlayingCardWidth = getResources().getDimensionPixelSize(R.dimen.notif_card_img_max_width);
    mNowPlayingCardHeight = getResources().getDimensionPixelSize(R.dimen.notif_card_img_height);

    mTvViewUiManager.restoreDisplayMode(false);
    if (!handleIntent(getIntent())) {
        finish();
        return;
    }

    mAudioCapabilitiesReceiver = new AudioCapabilitiesReceiver(this,
            new AudioCapabilitiesReceiver.OnAc3PassthroughCapabilityChangeListener() {
                @Override
                public void onAc3PassthroughCapabilityChange(boolean capability) {
                    mAc3PassthroughSupported = capability;
                }
            });
    mAudioCapabilitiesReceiver.register();

    mAccessibilityManager = (AccessibilityManager) getSystemService(Context.ACCESSIBILITY_SERVICE);
    mSendConfigInfoRecurringRunner = new RecurringRunner(this, TimeUnit.DAYS.toMillis(1),
            new SendConfigInfoRunnable(mTracker, mTvInputManagerHelper), null);
    mSendConfigInfoRecurringRunner.start();
    mChannelStatusRecurringRunner = SendChannelStatusRunnable.startChannelStatusRecurringRunner(this, mTracker,
            mChannelDataManager);

    // To avoid not updating Rating systems when changing language.
    mTvInputManagerHelper.getContentRatingsManager().update();

    initForTest();
}

From source file:android.support.v71.widget.RecyclerView.java

public RecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    LogUtil.e("---------------RecyclerView  --------------------- ");
    //   /*from w  w w. j av a 2  s .co  m*/
    setScrollContainer(true);
    //  touch ?
    setFocusableInTouchMode(true);
    final int version = Build.VERSION.SDK_INT;
    //TODO  > 16  ? 
    mPostUpdatesOnAnimation = version >= 16;

    // ?  ? ??
    final ViewConfiguration vc = ViewConfiguration.get(context);
    mTouchSlop = vc.getScaledTouchSlop();
    mMinFlingVelocity = vc.getScaledMinimumFlingVelocity();
    mMaxFlingVelocity = vc.getScaledMaximumFlingVelocity();

    // ?   ?
    setWillNotDraw(ViewCompat.getOverScrollMode(this) == ViewCompat.OVER_SCROLL_NEVER);

    // ?
    mItemAnimator.setListener(mItemAnimatorListener);
    // ? adapter Manager
    initAdapterManager();
    initChildrenHelper();
    // If not explicitly specified this view is important for accessibility.
    // ,  RecycleView ??  accessibility
    if (ViewCompat.getImportantForAccessibility(this) == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
    // ?  AccessibilityManager ? ?,  ? ??,  ?  app ?
    mAccessibilityManager = (AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    setAccessibilityDelegateCompat(new android.support.v71.widget.RecyclerViewAccessibilityDelegate(this));
    // Create the layoutManager if specified.
    if (attrs != null) {
        int defStyleRes = 0;
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RecyclerView, defStyle, defStyleRes);
        //xml ?  LayoutManager
        String layoutManagerName = a.getString(R.styleable.RecyclerView_layoutManager);
        a.recycle();
        createLayoutManager(context, layoutManagerName, attrs, defStyle, defStyleRes);
    }

    // 
    mScrollingChildHelper = new NestedScrollingChildHelper(this);
    setNestedScrollingEnabled(true);
}

From source file:cn.ismartv.tvrecyclerview.widget.RecyclerView.java

public RecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    if (attrs != null) {
        TypedArray a = context.obtainStyledAttributes(attrs, CLIP_TO_PADDING_ATTR, defStyle, 0);
        mClipToPadding = a.getBoolean(0, true);
        a.recycle();//from   ww w .  jav  a 2  s .  c  o m
    } else {
        mClipToPadding = true;
    }
    setScrollContainer(true);
    setFocusableInTouchMode(true);
    final int version = Build.VERSION.SDK_INT;
    mPostUpdatesOnAnimation = version >= 16;

    final ViewConfiguration vc = ViewConfiguration.get(context);
    mTouchSlop = vc.getScaledTouchSlop();
    mMinFlingVelocity = vc.getScaledMinimumFlingVelocity();
    mMaxFlingVelocity = vc.getScaledMaximumFlingVelocity();
    setWillNotDraw(getOverScrollMode() == View.OVER_SCROLL_NEVER);

    mItemAnimator.setListener(mItemAnimatorListener);
    initAdapterManager();
    initChildrenHelper();
    // If not explicitly specified this view is important for accessibility.
    if (ViewCompat.getImportantForAccessibility(this) == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
    mAccessibilityManager = (AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    setAccessibilityDelegateCompat(new RecyclerViewAccessibilityDelegate(this));
    // Create the layoutManager if specified.

    boolean nestedScrollingEnabled = true;

    if (attrs != null) {
        int defStyleRes = 0;
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RecyclerView, defStyle, defStyleRes);
        String layoutManagerName = a.getString(R.styleable.RecyclerView_layoutManager);
        int descendantFocusability = a.getInt(R.styleable.RecyclerView_android_descendantFocusability, -1);
        if (descendantFocusability == -1) {
            setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
        }
        a.recycle();
        createLayoutManager(context, layoutManagerName, attrs, defStyle, defStyleRes);

        if (Build.VERSION.SDK_INT >= 21) {
            a = context.obtainStyledAttributes(attrs, NESTED_SCROLLING_ATTRS, defStyle, defStyleRes);
            nestedScrollingEnabled = a.getBoolean(0, true);
            a.recycle();
        }
    } else {
        setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
    }

    // Re-set whether nested scrolling is enabled so that it is set on all API levels
    setNestedScrollingEnabled(nestedScrollingEnabled);
}