[英]Android: How to set text animation in ViewPager
當用戶滑動到下一個屏幕時,我想開始淡入淡出動畫,但是我無法使其正常工作。 問題是動畫同時在第一和第二屏幕上,在第三和第四屏幕上等開始。
這是我的PageFragment;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Animation in;
Animation out;
in = new AlphaAnimation(0.0f, 1.0f);
in.setDuration(2000);
out = new AlphaAnimation(1.0f, 0.0f);
out.setDuration(2000);
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.page_fragment_layout,container,false);
textView = (TextView)view.findViewById(R.id.textView);
Bundle bundle = getArguments();
String message = bundle.getString("count");
textView.setText(message);
textView.setAnimation(in);
return view;
}}
刷卡適配器
public class SwipeAdapter extends FragmentStatePagerAdapter{
public SwipeAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int i) {
String[] historia = {"1", "2", "3", "4", "5"};
Fragment fragment = new PageFragment();
Bundle bundle = new Bundle();
bundle.putString("count", historia[i]);
fragment.setArguments(bundle);
return fragment;
}
@Override
public int getCount() {
return 5;
}}
主要活動
public class MainActivity extends FragmentActivity {
ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.view_pager);
SwipeAdapter swipeAdapter = new SwipeAdapter(getSupportFragmentManager());
viewPager.setAdapter(swipeAdapter);
}}
感謝您提供任何有用的答案! :)
向您的swipeAdapter
注冊ViewPager.OnPageChangeListener
(與swipeAdapter.addOnPageChangeListener()
)。 然后,您可以將動畫內容移動到public void onPageSelected(int position)
。 不要忘記在onResume/onPause
調用添加/刪除監聽器。
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