Scrollview .scrollto Not Working? Saving Scrollview Position On Rotation

Ok.. I must be overlooking something real simple here, but i think i'm trying to do something fairly basic.. Simply retain the scrollbar position of a ScrollView on orientation cha

Solution 1:

I figured it out.

Since I'm using setText to TextViews in my onCreate, calling .scrollTo won't work.

So now I'm using the following:

sView.post(newRunnable() {
    @Overridepublicvoidrun() {
        sView.scrollTo(sViewX, sViewY);
    } 
});

Solution 2:

onRestoreInstanceState() is just to early to scroll the view. That's why posting new Runnable helps, but not always. Sometimes one even have to use postDelayed() to let it work. For Fragment one can use onViewCreated() instead :

@OverridepublicvoidonViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    sViewX = savedInstanceState.getInt("sViewX");   
    sViewY = savedInstanceState.getInt("sViewY");
    sView.scrollTo(sViewX, sViewY);
}

Solution 3:

This is working for me

@OverrideprotectedvoidonSaveInstanceState(Bundle outState) {
    outState.putInt(SystemGlobal.SCROLL_Y, mRelativeLayoutMain.getTop());
}

@OverrideprotectedvoidonRestoreInstanceState(Bundle savedInstanceState) {
    // TODO Auto-generated method stubsuper.onRestoreInstanceState(savedInstanceState);
    mRelativeLayoutMain.scrollTo(0, savedInstanceState.getInt(SystemGlobal.SCROLL_Y));
}

Solution 4:

You should start scroll before components are drawn, since scroll does not work untill components are not created:

@OverridepublicvoidonWindowFocusChanged(boolean hasFocus) {
    scrollView.scrollTo(.... 

Solution 5:

this code worked for me for dynamically scrolling tabs, maybe it will be useful for u

TabHost tabHost;
int currentActiveTab;
HorizontalScrollView tabsHorizontalScrollView;
//some code ...
tabHost = getTabHost();
tabsHorizontalScrollView = findViewById(R.id.tabsHorizontalScrollView);
currentActiveTab = 8;
//some code ...
tabHost.setCurrentTab(currentActiveTab);
tabHost.getTabWidget().getChildAt(currentActiveTab).post(new Runnable() {
  @Override
  publicvoidrun() {
    tabsHorizontalScrollView.scrollTo(tabHost.getTabWidget().getChildAt(currentActiveTab).getLeft(), tabsHorizontalScrollView.getScrollY());
  }
});