在内存重启的时候自动恢复可见状态的Fragment，避免重叠现象，懒加载的Fragment

BaseFragment.java

public abstract class BaseFragment extends Fragment {
    public static final String IS_SHOW = "is_show";
    protected View mRootView;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onCreate:");
        }
        if (savedInstanceState != null && getFragmentManager() != null) {
            boolean isShow = savedInstanceState.getBoolean(IS_SHOW, true);
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            if (BuildConfig.DEBUG) {
                Log.d(this.getClass().getSimpleName(), "restore show:" + isShow);
            }
            if (!isShow) {
                ft.hide(this);
            } else {
                ft.show(this);
            }
            ft.commit();
            //是否从内存重启恢复后，并隐藏自己，某些情况下，可能在某个生命周期执行时（如onResume），进行动画等只是在用户操作界面之前才执行的初始化操作，这时候可以根据这个值来判断是否进行这些操作
            setUserVisibleHint(isShow);
        }
    }


    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putBoolean(IS_SHOW, !isHidden());
    }

    @Override
    public void onHiddenChanged(boolean hidden) {
        super.onHiddenChanged(hidden);
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onHiddenChanged" + hidden);
        }
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onCreateView");
        }
        mRootView = onCreateContentView(inflater, container, savedInstanceState);
        return mRootView;
    }


    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        if (BuildConfig.DEBUG) {
            Log.v(getClass().getSimpleName(), "onViewCreated");
        }
        initView(view, savedInstanceState);
        initData(savedInstanceState);
    }

    @Override
    public void onStart() {
        super.onStart();
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onStart");
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onResume(),should do animation:" + getUserVisibleHint());
        }
    }


    @Override
    public void onPause() {
        super.onPause();
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onPause");
        }
    }

    @Override
    public void onStop() {
        super.onStop();
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onStop");
        }
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onDestroyView");
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (BuildConfig.DEBUG) {
            Log.d(getClass().getSimpleName(), "onDestroy");
        }
    }

    protected abstract View onCreateContentView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState);

    protected abstract void initView(View root, Bundle savedInstanceState);

    protected abstract void initData(Bundle savedInstanceState);


}

LazyFragment.java

/**
 * <h1>懒加载Fragment</h1> 只有创建并显示的时候才会调用onCreateViewLazy方法<br>
 * <br>
 * <p>
 * 懒加载的原理onCreateView的时候Fragment有可能没有显示出来。<br>
 * 但是调用到setUserVisibleHint(boolean isVisibleToUser),isVisibleToUser =
 * true的时候就说明有显示出来<br>
 * 但是要考虑onCreateView和setUserVisibleHint的先后问题所以才有了下面的代码
 * <p>
 * 注意：<br>
 * 《1》原先的Fragment的回调方法名字后面要加个Lazy，比如Fragment的onCreateView方法， 就写成onCreateViewLazy <br>
 * 《2》使用该LazyFragment会导致多一层布局深度
 * <p>
 * LuckyJayce
 */
public class LazyFragment extends BaseFragment {
    private boolean isInit = false;
    private Bundle savedInstanceState;
    public static final String INTENT_BOOLEAN_LAZYLOAD = "intent_boolean_lazyLoad";
    private boolean isLazyLoad = true;
    private FrameLayout layout;

    @Deprecated
    protected final void onCreateView(Bundle savedInstanceState) {
        super.onCreateView(savedInstanceState);
        this.savedInstanceState = savedInstanceState;
        Bundle bundle = getArguments();
        if (bundle != null) {
            isLazyLoad = bundle.getBoolean(INTENT_BOOLEAN_LAZYLOAD, isLazyLoad);
        }
        if (isLazyLoad) {
            if (getUserVisibleHint() && !isInit) {
                isInit = true;
                onCreateViewLazy(savedInstanceState);
            } else {
                LayoutInflater layoutInflater = inflater;
                if (layoutInflater == null) {
                    layoutInflater = LayoutInflater.from(getApplicationContext());
                }
                layout = new FrameLayout(layoutInflater.getContext());
                View view = getPreviewLayout(layoutInflater, layout);
                if (view != null) {
                    layout.addView(view);
                }
                layout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
                super.setContentView(layout);
            }
        } else {
            isInit = true;
            onCreateViewLazy(savedInstanceState);
        }
    }

    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        if (isVisibleToUser && !isInit && getContentView() != null) {
            isInit = true;
            onCreateViewLazy(savedInstanceState);
            onResumeLazy();
        }
        if (isInit && getContentView() != null) {
            if (isVisibleToUser) {
                isStart = true;
                onFragmentStartLazy();
            } else {
                isStart = false;
                onFragmentStopLazy();
            }
        }
    }

    protected View getPreviewLayout(LayoutInflater inflater, ViewGroup container) {
        return null;
    }

    @Deprecated
    @Override
    public final void onStart() {
        super.onStart();
        if (isInit && !isStart && getUserVisibleHint()) {
            isStart = true;
            onFragmentStartLazy();
        }
    }

    @Deprecated
    @Override
    public final void onStop() {
        super.onStop();
        if (isInit && isStart && getUserVisibleHint()) {
            isStart = false;
            onFragmentStopLazy();
        }
    }

    private boolean isStart = false;

    protected void onFragmentStartLazy() {

    }

    protected void onFragmentStopLazy() {

    }

    protected void onCreateViewLazy(Bundle savedInstanceState) {

    }

    protected void onResumeLazy() {

    }

    protected void onPauseLazy() {

    }

    protected void onDestroyViewLazy() {

    }

    @Override
    public void setContentView(int layoutResID) {
        if (isLazyLoad && getContentView() != null && getContentView().getParent() != null) {
            layout.removeAllViews();
            View view = inflater.inflate(layoutResID, layout, false);
            layout.addView(view);
        } else {
            super.setContentView(layoutResID);
        }
    }

    @Override
    public void setContentView(View view) {
        if (isLazyLoad && getContentView() != null && getContentView().getParent() != null) {
            layout.removeAllViews();
            layout.addView(view);
        } else {
            super.setContentView(view);
        }
    }

    @Override
    @Deprecated
    public final void onResume() {
        super.onResume();
        if (isInit) {
            onResumeLazy();
        }
    }

    @Override
    @Deprecated
    public final void onPause() {
        super.onPause();
        if (isInit) {
            onPauseLazy();
        }
    }

    @Override
    @Deprecated
    public final void onDestroyView() {
        super.onDestroyView();
        if (isInit) {
            onDestroyViewLazy();
        }
        isInit = false;
    }
}