要实现Android视图翻页器与过渡动画,可以按照以下步骤进行:
ViewPager viewPager = findViewById(R.id.viewPager);
MyPagerAdapter adapter = new MyPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(adapter);
public class MyPagerAdapter extends FragmentPagerAdapter {
private static final int NUM_PAGES = 3;
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// 返回需要显示的Fragment
return MyFragment.newInstance(position);
}
@Override
public int getCount() {
// 返回Fragment的数量
return NUM_PAGES;
}
}
public class MyFragment extends Fragment {
private static final String ARG_POSITION = "position";
private int position;
public static MyFragment newInstance(int position) {
MyFragment fragment = new MyFragment();
Bundle args = new Bundle();
args.putInt(ARG_POSITION, position);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
position = getArguments().getInt(ARG_POSITION);
}
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_my, container, false);
// 在此处设置每个页面的布局和内容
return view;
}
}
public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
private static final float MIN_SCALE = 0.85f;
private static final float MIN_ALPHA = 0.5f;
@Override
public void transformPage(@NonNull View page, float position) {
int pageWidth = page.getWidth();
int pageHeight = page.getHeight();
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
page.setAlpha(0f);
} else if (position <= 1) { // [-1,1]
// Modify the default slide transition to shrink the page as well
float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
float verticalMargin = pageHeight * (1 - scaleFactor) / 2;
float horizontalMargin = pageWidth * (1 - scaleFactor) / 2;
if (position < 0) {
page.setTranslationX(horizontalMargin - verticalMargin / 2);
} else {
page.setTranslationX(-horizontalMargin + verticalMargin / 2);
}
// Scale the page down (between MIN_SCALE and 1)
page.setScaleX(scaleFactor);
page.setScaleY(scaleFactor);
// Fade the page relative to its size.
page.setAlpha(MIN_ALPHA +
(scaleFactor - MIN_SCALE) /
(1 - MIN_SCALE) * (1 - MIN_ALPHA));
} else { // (1,+Infinity]
// This page is way off-screen to the right.
page.setAlpha(0f);
}
}
}
viewPager.setPageTransformer(true, new ZoomOutPageTransformer());
通过按照以上步骤,您可以实现Android视图翻页器与过渡动画。请注意,这里的代码示例仅为参考,并且可能需要根据您的具体需求进行