android新建simpleAdapter报错

在girdview中添加simpleAdapter,为什么新建SimpleAdapter的时候会报错？

我的代码如下：

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=".MainActivity" 
 android:orientation="vertical">
<GridView
    android:id="@+id/gridview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>
</LinearLayout>
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=".activity" 
 android:orientation="vertical">
<ImageView 
    android:id="@+id/image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>
</LinearLayout>
package com.example.test4;
import android.os.Bundle;
 import android.widget.*;
 import java.util.*;
 import android.app.Activity;
 import android.view.Menu;

public class MainActivity extends Activity {
SimpleAdapter s=null;
GridView grid=null;
List<Map<String,Integer>> list=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    grid=(GridView)super.findViewById(R.id.gridview);
    initAdapter();
    grid.setAdapter(s);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
public void initAdapter()
{
    Map<String,Integer> map=new HashMap<String,Integer>();
    map.put("图片", R.drawable.a1);
    list.add(map);
    map.put("图片", R.drawable.a2);
    list.add(map);
    map.put("图片", R.drawable.a1);
    list.add(map);
    s=new SimpleAdapter(MainActivity.this,list,R.layout.imageview,new String[]{"图片"},new Integer[]{R.id.image});
}
}

其中，s=new SimpleAdapter.....那行被报错，我截张图：

应该就是说构造方法没这样的重载，明明就应该没错的吧，请问这里是怎么回事？应该怎么解决？