android-scroll | 易学教程

How to scroll ListView to the bottom?

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问题 I though this would be a simple task, but apparently there is no way to scroll listview to the bottom. All solutions that I found are using variations of setSelection(lastItem) method which only sets selection to last item, but does not scrolls to the bottom of it. In my case I have a empty listview (with a long empty view header set) and I want to scroll to bottom of it. So, is there a way to do it? Edit: So for those who are interested the working solution is: getListView()

Controlling two ViewPager Together

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I need to synchronize the two ViewPager together. The requirement is something like on scrolling the ViewPager-1 and the ViewPager-2 should also scroll by certain amount. The Image shown below will make you more clear with my question. You can also help me with some tutorials link. Thanks. I think this is what you need: viewpager1.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { viewpager2.onTouchEvent(event); return false; } }); viewpager2.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent

Autoscrollable title in Android Actionbar (Marquee)

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问题 is there a possibility to make the title of an Android ActionBar scroll automatically (marquee) if it's too large? 回答1: You could try implementing my answer to this question and add android:ellipsize="marquee" to the TextView...? Worth a shot. 回答2: Well I have done this way: Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); try { Field f = toolbar.getClass().getDeclaredField("mTitleTextView"); f.setAccessible(true); TextView toolbarTextView = (TextView) f

list view position is getting changed when scrolling on android

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I have list view [text view and check box controlls] with more data. I will choose the item from list view and display the selected items in the next activity. My problem is, for the example if I choose 20th and 25th item in the list view it will display some other items in the next activity. That is list view position is getting changed when scrolling. i am choosing an item by clicking the check box on the item. in the checkbox.setOnChanged listener i wrote code for which position is selected or not. if i choose 25th item and scroll the list view, the getview method is called and the checkbox

Controlling two ViewPager Together

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问题 I need to synchronize the two ViewPager together. The requirement is something like on scrolling the ViewPager-1 and the ViewPager-2 should also scroll by certain amount. The Image shown below will make you more clear with my question. You can also help me with some tutorials link. Thanks. 回答1: I think this is what you need: viewpager1.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { viewpager2.onTouchEvent(event); return false; } });

How to Hide ActionBar/Toolbar While Scrolling Down in Webview

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In Google chrome and play store. the app can hide the actionbar while scrolling and allows the user to Browse conveniently. Please Help me to do like this. I've used onTouchListener for webview it doesn't works. mWebView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: getSupportActionBar().show(); break; case MotionEvent.ACTION_UP: getSupportActionBar().hide(); break; default: break; } return false; } }); Thanks in Advance Dhir Pratap You can do this without any Java code

How to do the new PlayStore parallax effect

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Does anyone know how can I achieve the new parallax scrolling effect - you can see the effect when you open an app on the PlayStore and try to scroll down, the content goes over the top image. How can I achieve that? Paresh Mayani Google has recently announced Design support library and with this it has support for implementing Collapsing Toolbar . In addition to pinning a view, you can use app:layout_collapseMode="parallax" (and optionally app:layout_collapseParallaxMultiplier="0.7" to set the parallax multiplier) to implement parallax scrolling (say of a sibling ImageView within the

How do I synchronize scrollview positions of dynamic horizontal scroll views inside a container?

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问题 I have a parent container in one of my activities which make a call to it's child containers consisting of a horizontal scrollview as one of the objects. Sort of like a recyclerview with row objects placed inside where there is a common row/item layout consisting of a horizontal scroll view. My objective is to sync the positions of the horizontalscrollview such that, when i am scrolling horizontally on one of the objects from position 1 to position 2, all the other items containing horizontal

Recyclerview inside ScrollView not scrolling smoothly

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For my app I am using a RecyclerView inside a ScrollView where the RecyclerView has a height based on its content using this library . Scrolling is working but it's not working smoothly when I scroll over the RecyclerView . When I scroll over the ScrollView itself it is scrolling smoothly. The code I am using to define the RecyclerView : LinearLayoutManager friendsLayoutManager = new LinearLayoutManager(getActivity().getApplicationContext(), android.support.v7.widget.LinearLayoutManager.VERTICAL, false); mFriendsListView.setLayoutManager(friendsLayoutManager); mFriendsListView

How to Hide ActionBar/Toolbar While Scrolling Down in Webview

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问题 In Google chrome and play store. the app can hide the actionbar while scrolling and allows the user to Browse conveniently. Please Help me to do like this. I've used onTouchListener for webview it doesn't works. mWebView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: getSupportActionBar().show(); break; case MotionEvent.ACTION_UP: getSupportActionBar().hide(); break;