我想知道如何正确使用连接可扩展列表视图的适配器和同时连接gridView的适配器

时间：2018-08-29 09:21:35

标签： android android-layout gridview expandablelistview expandablelistadapter

我要实现的是将GridView放在Expandable List中。 当前，我的代码有两个适配器，分别称为“ CustomListAdapter”和“ SiteAdapter”，它们将GridView连接到可扩展列表，而“ SiteAdapter”将数据连接到GridView。 到目前为止，我们已经构建的代码已经很好地连接到GridView的Expandable List。但是，gridView内部的数据似乎已连接到gridView（查看gridview中的项目并单击适当的链接），但是组成gridview的内部设计的图像和文本没有出现在屏幕上。 我已经在名为“ siteAdapter”的适配器代码中使用了setImage和setText，但是我不知道为什么在屏幕上未正确配置它。

1] SiteAdapter.java（链接GridView和项目的siteAdapter代码）

public class SiteAdapter extends ArrayAdapter<Site> {
private Site currentSite;

public SiteAdapter(Context context, ArrayList<Site> sites) {
    super(context, 0, sites);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View listItemView = convertView;
    if(listItemView == null){
        listItemView = LayoutInflater.from(getContext()).inflate(R.layout.list_item,parent,false);
    }
    currentSite = getItem(position);

    ImageView imageView = (ImageView) listItemView.findViewById(R.id.image);
    imageView.setBackground(new ShapeDrawable(new OvalShape()));
    imageView.setClipToOutline(true);
    imageView.setImageBitmap(bitmap);

    TextView name = (TextView) listItemView.findViewById(R.id.name);
    name.setText(currentSite.getMsite_name());

    return listItemView;
}

2] CustomListAdapter.java（链接ExpandableList和GridView）

public class CustomListAdapter extends BaseExpandableListAdapter {
private Context mContext;
private ArrayList<String> arrayGroup;
private HashMap<String,ArrayList<Site>> arrayChild;

public CustomListAdapter(Context context, ArrayList<String> arrayGroup, HashMap<String, ArrayList<Site>> arrayChild){
    super();
    this.mContext = context;
    this.arrayGroup = arrayGroup;
    this.arrayChild = arrayChild;
}

@Override
public int getGroupCount() {
    return arrayGroup.size();
}

@Override
public int getChildrenCount(int groupPosition) {
    return arrayChild.get(arrayGroup.get(groupPosition)).size();
}

@Override
public Object getGroup(int groupPosition) {
    return arrayGroup.get(groupPosition);
}

@Override
public Object getChild(int groupPosition, int childPosition)
{
    return arrayChild.get(arrayGroup.get(groupPosition)).get(childPosition);
}

@Override
public long getGroupId(int groupPosition) {
    return groupPosition;
}

@Override
public long getChildId(int groupPosition, int childPosition){
    return childPosition;
}

@Override
public boolean hasStableIds() {
    return false;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    String groupName = arrayGroup.get(groupPosition);
    View v = convertView;

    if(v==null){
        LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = (LinearLayout)inflater.inflate(R.layout.parent_listview_title, null);
    }
    TextView textGroup = (TextView) v.findViewById(R.id.title_site_list);
    textGroup.setText(groupName);

    return v;
}

@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent){
    String groupName = arrayGroup.get(groupPosition);
    View v = convertView;

    if(v == null){
        LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = (LinearLayout)inflater.inflate(R.layout.child_gridview_item, null);
    }
    SiteAdapter siteAdapter = new SiteAdapter(mContext,arrayChild.get(groupName));
    GridView gridView = (GridView) v.findViewById(R.id.gridView);
    gridView.setAdapter(siteAdapter);


    return v;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}

}

3] site_list.xml 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical">
<ExpandableListView
    android:id="@+id/parentList"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

</ExpandableListView>
</LinearLayout>

4] parent_listview_title.xml（设计可扩展列表的父列表的代码）

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
    android:id="@+id/title_site_list"
    android:layout_width="wrap_content"
    android:textSize="40sp"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:textColor="#000000"
    android:layout_marginLeft="16dp"
    android:fontFamily="@font/bm_dohyeon"
    android:textStyle="bold"/>
</LinearLayout>

5] child_gridview_item.xml（设计可扩展列表的子列表的代码）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools">
<ViewSwitcher
    android:id="@+id/visibility"
    android:layout_width="match_parent"
    android:layout_height="180dp"
    android:layout_marginTop="20dp">
    <View
        android:layout_width="match_parent"
        android:layout_height="3dp"
        android:background="#FFFFFF"
        />
    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:background="#FFFFFF"
        tools:context=".home"
        android:id="@+id/gridView"
        android:columnWidth="96dp"
        android:numColumns="4"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="4dp"
        android:stretchMode="columnWidth"
        android:gravity="center"/>
</ViewSwitcher>
</LinearLayout>

6] list_item.xml（设计gridview内容的代码，即Expandable List的子列表）

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_gravity="center"
>
<ImageView
    android:layout_width="60dp"
    android:layout_height="60dp"
    android:id="@+id/image"
    android:scaleType="centerCrop"
    tools:src="@mipmap/ic_launcher"
    android:layout_gravity="center"
    />
<TextView
    android:layout_width="60dp"
    android:layout_height="wrap_content"
    android:id="@+id/name"
    tools:text="Gistsite"
    android:textAppearance="?android:textAppearanceMedium"
    android:textStyle="bold"
    android:gravity="center_horizontal"
    android:textSize="4sp"
    />
</LinearLayout>

7] Site.java 

public class Site {
private String msite_name;
private String msite_url;
private String msite_urlF;
private String msite_urlY;
private String msite_urlB;
private String msite_urlW;
private String msite_urlI;
private int msite_imagesource;

public Site(String name, String url, int imagesource){
    msite_name = name;
    msite_url = url;
    msite_imagesource = imagesource;
}

public Site(String name, String urlf, String urly, int imagesource){
    msite_name = name;
    msite_urlF = urlf;
    msite_urlY = urly;
    msite_imagesource = imagesource;
}

public Site(String name, String urlw, String urlb, String urlf, String urli,int imagesource){
    msite_name = name;
    msite_urlW = urlw;
    msite_urlB = urlb;
    msite_urlF = urlf;
    msite_urlI = urli;
    msite_imagesource = imagesource;
}

public String getMsite_name() {
    return this.msite_name;
}
public String getMsite_url(){
    return this.msite_url;
}
public String getMsite_urlW(){
    return this.msite_urlW;
}
public String getMsite_urlB(){ return this.msite_urlB; }
public String getMsite_urlF(){
    return this.msite_urlF;
}
public String getMsite_urlY(){
    return this.msite_urlY;
}
public String getMsite_urlI(){
    return this.msite_urlI;
}
public int getMsite_imagesource(){
    return this.msite_imagesource;
}

总而言之，问题在于在list_item.xml中设计的图像视图和文本视图的内容不可用。

0 个答案:

没有答案
相关问题
最新问题