BaseRestoreFragment.java

/**
 * 在内存重启的时候自动恢复可见状态的Fragment，避免重叠现象
 * 但同时不要忘了在Activity中判断`savedInstanceState`为null的时候才操作Fragment
 * Created by chensuilun on 16-8-9.
 */
public abstract class BaseRestoreFragment 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());
    }

    @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);
        initData();
    }

    @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);

    protected abstract void initData();


}