Java Android:如何在ViewPager中设置文本动画
我想在用户滑动到下一个屏幕时开始淡入动画,但我无法让它正常工作。问题是动画在第一个和第二个屏幕、第三个和第四个屏幕上同时开始 这是我的页面片段Java Android:如何在ViewPager中设置文本动画,java,android,animation,android-viewpager,fragment,Java,Android,Animation,Android Viewpager,Fragment,我想在用户滑动到下一个屏幕时开始淡入动画,但我无法让它正常工作。问题是动画在第一个和第二个屏幕、第三个和第四个屏幕上同时开始 这是我的页面片段 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Animation in; Animation out;
@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;
}}
SwipeAdapter
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;
}}
主要活动
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);
}}
谢谢你的回答!:) 用您的
swipeAdapter
注册ViewPager.OnPageChangeListener
(如swipeAdapter.addOnPageChangeListener()
)。然后,您可以将动画内容移动到public void on pageselected(int位置)
。不要忘记在onResume/onPause
中调用那些添加/删除侦听器