Question

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <!--other views-->

    <net.cachapa.expandablelayout.ExpandableLayout
        android:id="@+id/expand_add"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:el_duration="500"
        app:el_expanded="false">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <EditText
                android:id="@+id/name"
                style="@style/EditText_BorderedMiddle_Grey_F"
                android:layout_width="match_parent"
                android:layout_weight="1"
                android:hint="@string/dialog_categories_hintname"/>

            <ImageView
                android:id="@+id/submit"
                style="@style/ImageView_FilledMiddle_Blue_F_50"
                android:src="@drawable/ic_check_white_48dp"/>
        </LinearLayout>
    </net.cachapa.expandablelayout.ExpandableLayout>

    <!--other views-->
</LinearLayout>

我怀疑输出（最后3行）
应该是

public class CategoriesDialog extends AppCompatDialog {
    //other codes
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Utils.setWindowGravity(getWindow(), Gravity.BOTTOM);
        //...
    }
    @OnClick(R.id.add)
    public void onAddClick() {
        expandAdd.toggle();
    }
}

public class Utils {
    public static void setWindowGravity(Window window, int gravity) {
        WindowManager.LayoutParams attributes = window.getAttributes();
        attributes.gravity = gravity;
        window.setAttributes(attributes);
    }
}

因为
using namespace std; static int index = 0; template<typename T> class vertexInfo { public: typename map< T, int>:: iterator vtxMapLoc; vertexInfo<T>(int index) {} vertexInfo<T>( typename map<T, int> :: iterator& iter) : vtxMapLoc{*iter} {} }; template <typename T> class graph { private: typename map< T, int > :: iterator iter; map <T,int> vtxMap; vector<vertexInfo<T> > vInfo; public: void addEdge( graph<T>& , const T& , const T&, int ); void show(graph<T>& ); void show_map_element( graph<T>& ); }; int main() { graph<char> g; g.addEdge(g,'A','B', 2); g.addEdge(g,'A','C', 3); g.addEdge(g,'B','D', 5); g.addEdge(g,'C','D', 1); g.addEdge(g,'B','C', 7); g.addEdge(g,'D','E', 4); g.show(g); g.show_map_element(g); return 0; } template <typename T> void graph<T> :: addEdge ( graph<T> & g, const T& v1 , const T& v2, int w) { pair <map <char, int> :: iterator, bool> ret ; ret = g.vtxMap.insert(pair <char, int >( v1, index)); if( ret.second) { g.vInfo.push_back(index); (g.vInfo[index].vtxMapLoc) = vtxMap.find(index); index++; } ret = g.vtxMap.insert(pair <char, int >(v2 , index)); if( ret.second) { g.vInfo.push_back(index); (g.vInfo[index].vtxMapLoc) = vtxMap.find(index); index++; } } } template<typename T> void graph<T> :: show( graph<T>& g) { for( g.iter = g.vtxMap.begin(); g.iter != g.vtxMap.end(); g.iter++) { cout<< (*(g.iter)).first <<" - >" << (*(g.iter)).second <<endl; } } template<typename T> void graph<T> :: show_map_element( graph<T>& g) { cout<< (*g.vInfo[2].vtxMapLoc).first<<endl; cout<< (*g.vInfo[3].vtxMapLoc).second<<endl; cout<< (*g.vInfo[4].vtxMapLoc).first<<endl; } Output : A -> 0 B -> 1 C -> 2 D -> 3 E -> 4 ( nothing printed ) 0 ( nothing printed )指向（C，2），它首先是C
C 3 E指向（D，3），其次是3 (*g.vInfo[2].vtxMapLoc)指向（E，4），它的第一个是E

似乎向量(*g.vInfo[3].vtxMapLoc)未正确指向地图(*g.vInfo[4].vtxMapLoc)
vInfo这指向正确吗？

使用Map和Set的图形表示

0 个答案: