Ich habe den Viewpager so eingestellt, dass er in der Mitte groß und auf beiden Seiten klein ist. Als jedoch die erste Netzwerkanfrage zurückkam, war die mittlere so groß wie die rechte.
Ich habe es in den Unterthread gestellt, aber es funktioniert immer noch nicht. Ich hoffe, dass Gott antworten wird. . .

public class ImpressCardFragment extends Fragment { @BindView(R.id.vp_pager) ViewPager mPager; private List mList; private Unbinder bind; private List fragmentList; private ImpressCardAdapter cartAdapter; private ACache aCache; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_impress_card, container, false); bind = ButterKnife.bind(this, rootView); transformerPager(); aCache = ACache.get(getContext()); mList = new ArrayList<>(); DisplayMetrics metric = new DisplayMetrics(); getActivity().getWindowManager().getDefaultDisplay().getMetrics(metric); int width = metric.widthPixels; // 屏幕宽度（像素） int height = metric.heightPixels; // 屏幕高度（像素） float density = metric.density; // 屏幕密度（0.75 / 1.0 / 1.5） int densityDpi = metric.densityDpi; mPager.setOffscreenPageLimit(4); mPager.setPageMargin(-width / 4); fragmentList = new ArrayList<>(); cartAdapter = new ImpressCardAdapter(getChildFragmentManager(), getContext(), fragmentList); mPager.setAdapter(cartAdapter); return rootView; } @Override public void onResume() { super.onResume(); //缓存 Impress impress = (Impress) aCache.getAsObject("impressCart"); // if (impress == null) { // getData(); // } else { // // mList.clear(); // mList.addAll(impress.object.get(0).data); // fragmentList.clear(); // for (int i = 0; i < mList.size(); i++) { // fragmentList.add(new PageFragment(mList.get(i))); // } // cartAdapter.notifyDataSetChanged(); // } handler.post(mRunnable); } /** * viewPager的转换效果 */ void transformerPager() { mPager.setPageTransformer(true, new ViewPager.PageTransformer() { public float position; public void transformPage(View page, float position) { this.position = position; if (position < -1) { // This page is way off-screen to the left. } else if (position <= 1) { if (position < 0) { if (position < -0.4f) position = -0.4f; page.setScaleY(1.4f + position); page.setScaleX(1.4f + position); } else { if (position > 0.4) position = 0.4f; page.setScaleY(1.4f - position); page.setScaleX(1.4f - position); } } else { // This page is way off-screen to the right. } } }); } @Override public void onDestroyView() { bind.unbind(); handler.removeCallbacks(mRunnable); super.onDestroyView(); } private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case 1: Impress body = (Impress) msg.obj; aCache.put("impressCart", body, 2); mList.clear(); mList.addAll(body.object.get(0).data); fragmentList.clear(); for (int i = 0; i < mList.size(); i++) { fragmentList.add(new PageFragment(mList.get(i))); } cartAdapter.notifyDataSetChanged(); break; } } }; private Runnable mRunnable = new Runnable() { @Override public void run() { HttpClient.createRequest(HttpTask.class).impressIndex(String.valueOf(0), String.valueOf(10)).enqueue(new Callback() { @Override public void onResponse(Call call, Response response) { if (response.body().code.equals(Constants.REQUESTID_SUCCESS)) { Impress body = response.body(); Message message = handler.obtainMessage(1); message.obj = body; handler.sendMessage(message); } } @Override public void onFailure(Call call, Throwable t) { Toast.makeText(getContext(), "服务器故障", Toast.LENGTH_SHORT).show(); } }); } }; }