StackOverflow2013

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plurals

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9301998
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2012-02-15T21:49:49.913
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2012-02-15T21:49:49.913
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text
Body
All I needed to do was move : <code>thisIsWhatBreaks = (LinearLayout)findViewById(R.id.layoutThatsAlwaysNull);</code> to the case which inflates the current layout.xml inside of instantiateItem() of the PagerAdapter. My problem with the nullpointerexceptions was that all of my views were being acted upon in onCreate(). I had to move all of the views from onCreate() to the case statement inside of instantiateItem(); See the corrected code below....just in case anyone else runs into this problem.... <pre><code>public class SimpleViewPagerActivity extends Activity { LinearLayout thisIsWhatBreaks; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); MyPagerAdapter adapter = new MyPagerAdapter(); ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager); myPager.setAdapter(adapter); myPager.setCurrentItem(2); //REMOVE THE LINEAR LAYOUT FROM BEING INSTANTIATED HERE! } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) { thisIsWhatBreaks.setBackgroundColor(Color.BLACK); } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){ thisIsWhatBreaks.setBackgroundColor(Color.RED); } } private class MyPagerAdapter extends PagerAdapter { public int getCount() { return 5; } public Object instantiateItem(View collection, int position) { view = new View(MainHome.this); final LayoutInflater inflater = (LayoutInflater) MainHome.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); switch(position){ case 0 : view = inflater.inflate(R.layout.farleft, null); thisIsWhatBreaks= (LinearLayout)v.findViewById(R.id.layoutThatUsedToAlwaysBeNull); ***Now you can modify thisIsWhatBreaks*** thisIsWhatBreaks.setBackgroundColor(Color.black); break; case 1: view = inflater.inflate(R.layout.farright, null); break; default : break; } ((ViewPager) collection).addView(v,0); return v; } @Override public void destroyItem(View arg0, int arg1, Object arg2) { ((ViewPager) arg0).removeView((View) arg2); } @Override public void finishUpdate(View arg0) { // TODO Auto-generated method stub } @Override public boolean isViewFromObject(View arg0, Object arg1) { return arg0 == ((View) arg1); } @Override public void restoreState(Parcelable arg0, ClassLoader arg1) { // TODO Auto-generated method stub } @Override public Parcelable saveState() { // TODO Auto-generated method stub return null; } @Override public void startUpdate(View arg0) { // TODO Auto-generated method stub } } } </code></pre>
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Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POAndroid viewpager......how to get a hold of the views?
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1. PTAnswer
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1. This table or related slice is empty.
UserOwnerUserId
1. USdell116
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1. POAndroid viewpager......how to get a hold of the views?
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1. VO
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2. VO
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3. VO
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1. This table or related slice is empty.

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