Android 对象的customAdapter不工作

我有一个模型班。现在，在我的活动中，我想在模型类中设置值，并使用我的自定义适配器在gridview中显示它们。之后，我需要将对象存储在gridview的onItemClick中的变量（类类型）中。我已经完成了以下代码。但它不起作用。我哪里出错了

activity\u country.xml

<RelativeLayout 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"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin"
 tools:context=".CountryActivity" >


<TextView
android:id="@+id/nTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="21dp"
android:layout_marginTop="26dp"
android:text="Name" />

<TextView
android:id="@+id/aTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/nTextView"
android:layout_below="@+id/nTextView"
android:layout_marginTop="24dp"
android:text="About" />

<EditText
android:id="@+id/CountryNameEditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/nTextView"
android:layout_alignBottom="@+id/nTextView"
android:layout_marginLeft="48dp"
android:layout_toRightOf="@+id/nTextView"
android:ems="10" >

<requestFocus />
</EditText>

<EditText
android:id="@+id/CountryAboutEditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/CountryNameEditText"
android:layout_alignTop="@+id/aTextView"
android:ems="10" />

<Button
android:id="@+id/saveCountryButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/CountryAboutEditText"
android:layout_below="@+id/CountryAboutEditText"
android:layout_marginLeft="16dp"
android:layout_marginTop="22dp"
android:text="Save" 
android:onClick="saveCountry"
/>

<GridView
android:id="@+id/countryGridView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/saveCountryButton"
android:layout_centerHorizontal="true"
android:numColumns="2">
</GridView>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >

 <TextView
        android:id="@+id/label1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@+id/label"
        android:layout_marginTop="15sp"
        android:textSize="15sp" >
</TextView>

<TextView
        android:id="@+id/label2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@+id/label"
        android:layout_marginTop="15sp"
        android:textSize="15sp" >
</TextView>
</LinearLayout>

不延伸任何东西

应该是

public class myAdapter extends BaseAdapter //orArrayAdapter
{

---

如果仍有问题，请发布stacktrace以获取进一步帮助

如何在此gridView中为每列添加标题？请检查并自行实现

 public class myAdapter extends BaseAdapter 
 {

Context mycontext;
ArrayList<Country> countries;

public myAdapter(Context c, ArrayList<Country> obj)
{
    this.mycontext=c;
    this.countries = obj;
}
public int getCount() {
    // TODO Auto-generated method stub
    return countries.size();
}

public Object getItem(int arg0) {
    // TODO Auto-generated method stub
    return countries.get(arg0);
}

public long getItemId(int arg0) {
    // TODO Auto-generated method stub
    return 0;
}

public View getView(int position, View convertview, ViewGroup parent) 
{
     LayoutInflater inflater = (LayoutInflater) mycontext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     View gridView;

     if(convertview==null)
      {
        gridView =new View(mycontext);
        gridView =inflater.inflate(R.layout.countrygrid, null);

        TextView txtvw1 = (TextView) gridView.findViewById(R.id.label1);
        txtvw1.setText(countries.get(position).getName());

        TextView txtvw2 = (TextView) gridView.findViewById(R.id.label2);
        txtvw2.setText(countries.get(position).getAbout());

     }
     else 
     {
         gridView = (View) convertview;
     }
    return gridView;
}
}

 countrygGridView.setAdapter(new myAdapter(this,countries));

public class myAdapter
{

public class myAdapter extends BaseAdapter //orArrayAdapter
{