Java Code Examples for android.view.ViewTreeObserver#OnScrollChangedListener

The following examples show how to use android.view.ViewTreeObserver#OnScrollChangedListener . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: BlurDrawableActivity.java    From Blur with Apache License 2.0 6 votes vote down vote up 
public ViewTreeObserver.OnScrollChangedListener getOnScrollChangedListener() {
    if (mOnScrollChangedListener == null) {
        mOnScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                //BlurDrawable
                ViewCompat.postInvalidateOnAnimation(mBlurDrawableRelativeLayout);

                //BlurMaskRelativeLayout
                int scrollY = mScrollView.getScrollY();
                Log.i("robin","scrollY:"+scrollY);
                float alpha = (float) scrollY/1000;
                if (alpha > 1f) {
                    alpha = 1f;
                }
                Log.i("robin","alpha:"+alpha);
                mBlurMaskRelativeLayout.setAlpha(1f-(alpha));

            }
        };
    }
    return mOnScrollChangedListener;
}
Example 2
Source File: AccountSigninConfirmationView.java    From 365browser with Apache License 2.0 6 votes vote down vote up 
/**
 * Sets observer. See {@link Observer}. Regardless of the passed value, notifications for
 * the previous observer will be canceled.
 *
 * @param observer Instance that will receive notifications, or null to clear the observer.
 */
public void setObserver(@Nullable Observer observer) {
    removeObservers();
    if (observer == null) return;

    mObserver = observer;
    mOnGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            checkScrolledToBottom();
        }
    };
    getViewTreeObserver().addOnGlobalLayoutListener(mOnGlobalLayoutListener);
    mOnScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() {
        @Override
        public void onScrollChanged() {
            checkScrolledToBottom();
        }
    };
    getViewTreeObserver().addOnScrollChangedListener(mOnScrollChangedListener);
}
Example 3
Source File: GlassView.java    From GlassView with Apache License 2.0 6 votes vote down vote up 
private ViewTreeObserver.OnScrollChangedListener getScrollChangedListener() {
    if (mScrollChangedListener == null) {
        mScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() {
            /**
             * Callback method to be invoked when something in the view tree
             * has been scrolled.
             */
            @Override
            public void onScrollChanged() {
                //Log.d(TAG, "onScrollChanged() called");
                invalidate();
            }
        };
    }
    return mScrollChangedListener;
}
Example 4
Source File: ActionBarPopupWindow.java    From TelePlus-Android with GNU General Public License v2.0 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}
Example 5
Source File: EmojiView.java    From TelePlus-Android with GNU General Public License v2.0 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}
Example 6
Source File: ActionBarPopupWindow.java    From TelePlus-Android with GNU General Public License v2.0 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}
Example 7
Source File: EmojiView.java    From TelePlus-Android with GNU General Public License v2.0 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}
Example 8
Source File: ActionBarPopupWindow.java    From KrGallery with GNU General Public License v2.0 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}
Example 9
Source File: MDRootLayout.java    From talk-android with MIT License 5 votes vote down vote up 
private void addScrollListener(final ViewGroup vg, final boolean setForTop, final boolean setForBottom) {
    if ((!setForBottom && mTopOnScrollChangedListener == null
            || (setForBottom && mBottomOnScrollChangedListener == null))) {
        ViewTreeObserver.OnScrollChangedListener onScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                boolean hasButtons = false;
                for (MDButton button : mButtons) {
                    if (button != null && button.getVisibility() != View.GONE) {
                        hasButtons = true;
                        break;
                    }
                }
                if (vg instanceof WebView) {
                    invalidateDividersForWebView((WebView) vg, setForTop, setForBottom, hasButtons);
                } else {
                    invalidateDividersForScrollingView(vg, setForTop, setForBottom, hasButtons);
                }
                invalidate();
            }
        };
        if (!setForBottom) {
            mTopOnScrollChangedListener = onScrollChangedListener;
            vg.getViewTreeObserver().addOnScrollChangedListener(mTopOnScrollChangedListener);
        } else {
            mBottomOnScrollChangedListener = onScrollChangedListener;
            vg.getViewTreeObserver().addOnScrollChangedListener(mBottomOnScrollChangedListener);
        }
        onScrollChangedListener.onScrollChanged();
    }
}
Example 10
Source File: ActionBarPopupWindow.java    From Yahala-Messenger with MIT License 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}
Example 11
Source File: BlurDrawableActivity.java    From BlurView with Apache License 2.0 5 votes vote down vote up 
public ViewTreeObserver.OnScrollChangedListener getOnScrollChangedListener() {
    if (mOnScrollChangedListener == null) {
        mOnScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                //BlurDrawable
                ViewCompat.postInvalidateOnAnimation(mBlurDrawableRelativeLayout);

            }
        };
    }
    return mOnScrollChangedListener;
}
Example 12
Source File: ProductFragment.java    From openshop.io-android with MIT License 5 votes vote down vote up 
/**
     * Prepare scroll view related animations and floating wishlist button.
     *
     * @param view fragment base view.
     */
    private void prepareScrollViewAndWishlist(View view) {
        final View productBackground = view.findViewById(R.id.product_background);
        wishlistButton = view.findViewById(R.id.product_add_to_wish_list);

        scrollViewListener = new ViewTreeObserver.OnScrollChangedListener() {
            private boolean alphaFull = false;

            @Override
            public void onScrollChanged() {
                int scrollY = contentScrollLayout.getScrollY();
                if (productImagesRecycler != null) {

                    if (wishlistButton.getWidth() * 2 > scrollY) {
                        wishlistButton.setTranslationX(scrollY / 4);
                    } else {
                        wishlistButton.setTranslationX(wishlistButton.getWidth() / 2);
                    }

                    float alphaRatio;
                    if (productImagesRecycler.getHeight() > scrollY) {
                        productImagesRecycler.setTranslationY(scrollY / 2);
                        alphaRatio = (float) scrollY / productImagesRecycler.getHeight();
                    } else {
                        alphaRatio = 1;
                    }
//                    Timber.e("scrollY:" + scrollY + ". Alpha:" + alphaRatio);

                    if (alphaFull) {
                        if (alphaRatio <= 0.99) alphaFull = false;
                    } else {
                        if (alphaRatio >= 0.9) alphaFull = true;
                        productBackground.setAlpha(alphaRatio);
                    }
                } else {
                    Timber.e("Null productImagesScroll");
                }
            }
        };
    }
Example 13
Source File: PEWTextView.java    From ParallaxEverywhere with MIT License 5 votes vote down vote up 
@Override
protected void onAttachedToWindow() {
    super.onAttachedToWindow();

    mOnScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() {
        @Override
        public void onScrollChanged() {
            applyParallax();
        }
    };

    mOnGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            heightView = (float) getHeight();
            widthView = (float) getWidth();

            applyParallax();
        }
    };

    ViewTreeObserver viewTreeObserver = getViewTreeObserver();
    viewTreeObserver.addOnScrollChangedListener(mOnScrollChangedListener);
    viewTreeObserver.addOnGlobalLayoutListener(mOnGlobalLayoutListener);

    if (updateOnDraw
            && android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        onDrawListener = new ViewTreeObserver.OnDrawListener() {
            @Override
            public void onDraw() {
                applyParallax();
            }
        };
        viewTreeObserver.addOnDrawListener(onDrawListener);
    }

    parallaxAnimation();
}
Example 14
Source File: PEWImageView.java    From ParallaxEverywhere with MIT License 5 votes vote down vote up 
@Override
protected void onAttachedToWindow() {
    super.onAttachedToWindow();

    mOnScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() {
        @Override
        public void onScrollChanged() {
            applyParallax();
        }
    };

    mOnGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            heightImageView = (float) getHeight();
            widthImageView = (float) getWidth();

            applyParallax();
        }
    };

    ViewTreeObserver viewTreeObserver = getViewTreeObserver();
    viewTreeObserver.addOnScrollChangedListener(mOnScrollChangedListener);
    viewTreeObserver.addOnGlobalLayoutListener(mOnGlobalLayoutListener);

    if (updateOnDraw
            && android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        onDrawListener = new ViewTreeObserver.OnDrawListener() {
            @Override
            public void onDraw() {
                applyParallax();
            }
        };
        viewTreeObserver.addOnDrawListener(onDrawListener);
    }

    parallaxAnimation();
}
Example 15
Source File: ActionBarPopupWindow.java    From Telegram-FOSS with GNU General Public License v2.0 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}
Example 16
Source File: ActionBarPopupWindow.java    From Telegram with GNU General Public License v2.0 5 votes vote down vote up 
private void init() {
    if (superListenerField != null) {
        try {
            mSuperScrollListener = (ViewTreeObserver.OnScrollChangedListener) superListenerField.get(this);
            superListenerField.set(this, NOP);
        } catch (Exception e) {
            mSuperScrollListener = null;
        }
    }
}