Java Code Examples for android.support.v4.widget.NestedScrollView#setOnScrollChangeListener()

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    mLayout = (NestedScrollView) inflater.inflate(R.layout.fragment_scroll_transition, null);
    mImageContainer = mLayout.findViewById(R.id.image_container);
    mBelowView = mLayout.findViewById(R.id.below_image);
    mAboveView = mLayout.findViewById(R.id.above_image);
    mLayout.setOnScrollChangeListener(this);
    mLayout.post(new Runnable() {
        @Override
        public void run() {
            if (mController == null) {
                initController();
            }
        }
    });
    return mLayout;
}
 

void attach(NestedScrollView scrollView) {
    //获得原始监听器，用作转发
    Field[] declaredFields = NestedScrollView.class.getDeclaredFields();
    if (declaredFields != null) {
        for (Field field : declaredFields) {
            if (NestedScrollView.OnScrollChangeListener.class.equals(field.getType())) {
                try {
                    field.setAccessible(true);
                    Object listener = field.get(scrollView);
                    if (listener != null && !scrollView.equals(listener)) {
                        mScrollChangeListener = (NestedScrollView.OnScrollChangeListener) listener;
                    }
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    scrollView.setOnScrollChangeListener(this);
}
 

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

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

    NestedScrollView nestedScrollView = findViewById(R.id.nested_scroll_view);
    mHeaderView = findViewById(R.id.header);

    nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
        @Override
        public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
            int headerHeight = mHeaderView.getHeight();
            int scrollDistance = Math.min(scrollY, headerHeight);
            int statusAlpha = (int) ((float) scrollDistance / (float) headerHeight * 255F);
            setAnyBarAlpha(statusAlpha);
        }
    });

    Sofia.with(this)
            .statusBarBackground(ContextCompat.getColor(this, R.color.colorPrimary))
            .navigationBarBackground(ContextCompat.getDrawable(this, R.color.colorNavigation))
            .invasionStatusBar()
            .fitsStatusBarView(mToolbar);

    setAnyBarAlpha(0);
}
 

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

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

    NestedScrollView nestedScrollView = findViewById(R.id.nested_scroll_view);
    mHeaderView = findViewById(R.id.header);

    final int startColor = ContextCompat.getColor(this, R.color.colorPrimary);
    final int endColor = ContextCompat.getColor(this, R.color.colorNavigation);

    nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
        @Override
        public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
            int headerHeight = mHeaderView.getHeight();
            int scrollDistance = Math.min(scrollY, headerHeight);
            float fraction = (float) scrollDistance / (float) headerHeight;

            setToolbarStatusBarAlpha(evaluate(fraction, startColor, endColor));
            setNavigationViewColor(evaluate(fraction, endColor, startColor));
        }
    });

    Sofia.with(this)
            .statusBarBackground(ContextCompat.getColor(this, R.color.colorPrimary))
            .navigationBarBackground(ContextCompat.getDrawable(this, R.color.colorNavigation));
}
 

private void initScrollAnimation(ViewHolder holder) {
    NestedScrollView scrollView = holder.get(R.id.scroll_view);
    ImageView avatar = holder.get(R.id.avatar);
    TextView username = holder.get(R.id.username);
    View backbground = holder.get(R.id.background);

    this.expectAnimMove = new ExpectAnim()
            .expect(avatar)
            .toBe(
                    topOfParent().withMarginDp(13),
                    leftOfParent().withMarginDp(13),
                    scale(0.5f, 0.5f)
            )
            .expect(username)
            .toBe(
                    toRightOf(avatar).withMarginDp(16),
                    sameCenterVerticalAs(avatar),
                    alpha(0.5f)
            )
            .expect(backbground)
            .toBe(
                    height(DensityUtils.dip2px(this, 60)).withGravity(Gravity.LEFT, Gravity.TOP)
            )
            .toAnimation();

    scrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
        @Override
        public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int
                oldScrollX, int oldScrollY) {
            final float percent = (scrollY * 1f) / v.getMaxScrollAmount();
            expectAnimMove.setPercent(percent);
        }
    });
}
 

/**
 * Register a ScrollView to the current MaterialViewPagerAnimator
 * Listen to ObservableScrollViewCallbacks so give to $[observableScrollViewCallbacks] your ObservableScrollViewCallbacks if you already use one
 * For loadmore or anything else
 *
 * @param scrollView the scrollable
 */
void registerScrollView(final NestedScrollView scrollView) {
    if (scrollView != null) {
        scrollViewList.add(scrollView);  //add to the scrollable list

        scrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {

            boolean firstZeroPassed;

            @Override
            public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
                //first time you get 0, don't share it to others scrolls
                if (scrollY == 0 && !firstZeroPassed) {
                    firstZeroPassed = true;
                    return;
                }

                //only if yOffset changed
                if (isNewYOffset(scrollY)) {
                    onMaterialScrolled(scrollView, scrollY);
                }
            }
        });

        scrollView.post(new Runnable() {
            @Override
            public void run() {
                setScrollOffset(scrollView, lastYOffset);
            }
        });
    }
}
 

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

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    String toolbarTitle = getResources().getString(R.string.sample_collapse_scroll_toolbar);
    CollapsingToolbarLayout collapsingToolbar =
            (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
    collapsingToolbar.setTitle(toolbarTitle);

    mFab = findViewById(R.id.fab);

    NestedScrollView scrollView = (NestedScrollView) findViewById(R.id.nested_scrollview);
    scrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
        @Override
        public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
            if (scrollY > oldScrollY) {
                animateFab(false);
            } else {
                animateFab(true);
            }
        }
    });
}
 

@Override
protected void registerWidget() {
    note_detail_groupname =$(R.id.note_detail_groupname) ;
    note_detail_groupname.setText(currentNoteInfo.title);
    real_toolbar =$(R.id.real_toolbar) ;
    note_detail_time =$(R.id.note_detail_time) ;
    editFab = $(R.id.edit_fab);

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            showHelp(editFab);
        }
    },1000);

    bindViewsToOnClickListenerById(R.id.note_detail_content,R.id.edit_fab);
    NestedScrollView nestedScrollView = getNestedScrollView();
    if(nestedScrollView == null){
        Log.e(NONoConfig.TAG_NONo,"note detail activity must have at lease one NestedScrollView");
    }else {
        nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
            @Override
            public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
                int dy = scrollY - oldScrollY;
                if (dy < 0) {
                    if (magicFlag) {
                        magicFlag = !magicFlag;
                        editFab.setVisibility(View.VISIBLE);
                    }
                } else if (dy > 0) {
                    if (!magicFlag) {
                        magicFlag = !magicFlag;
                        editFab.setVisibility(View.INVISIBLE);
                    }
                }
            }
        });
    }
    //iniFAB();
    if(((TextView)$(R.id.note_detail_text_num)).getText().toString().equals("0")){
        showTextNum(currentNoteInfo.content);
    }
}