我想在片段一个TextView更改文本片段,我可以很容易地在instantiateItem做到这一点,但instantiateItem后,TextView的是空,我不能为什么不工作
MyPagerAdapter.textView.SetText调用() ;
private class MyPagerAdapter extends PagerAdapter {
TextView textView;
public int getCount() {
return 5;
}
public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int resId = 0;
switch (position) {
case 0:
resId = R.layout.farleft;
View view = inflater.inflate(resId, null);
((ViewPager) collection).addView(view, 0);
textView = (TextView)view.findviewById(R.id.textvvvv);
return view;
case 1:
resId = R.layout.left;
break;
case 2:
resId = R.layout.middle;
break;
case 3:
resId = R.layout.right;
break;
case 4:
resId = R.layout.farright;
break;
}
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == ((View) arg1);
}
@Override
public Parcelable saveState() {
return null;
}
}
但是,该starnge在这里当我改变文本instantiateItem与
textView.SetText("EEE");
它工作得很好,但我不能MyPageAdapter外更改文本,为什么呢?
你试过setTextView( “EEE”) – Sana
adapter_Viewpager adapter = new adapter_Viewpager();和adapter.getAdapter没有findViewById ... – user1411084