<GridViewxmlns:android="http://schemas.android.com/apk/res/android"      android:id="@+id/gridview"      android:layout_width="fill_parent"       android:layout_height="fill_parent"      android:numColumns="auto_fit"      android:verticalSpacing="10dp"      android:horizontalSpacing="10dp"      android:columnWidth="90dp"      android:stretchMode="columnWidth"      android:gravity="center"  /> 

<RelativeLayout           xmlns:android="http://schemas.android.com/apk/res/android"          android:layout_height="wrap_content"            android:paddingBottom="4dip"android:layout_width="fill_parent">           <TextView          android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/textid"/>         <ImageView                 android:layout_height="wrap_content"                 android:id="@+id/ItemImage"                  android:layout_width="wrap_content"                android:layout_centerHorizontal="true">            </ImageView>  </RelativeLayout>  

 public class FileimageActivity extends Activity {       private static final String TAG = "Fileimage";       private List<HashMap<String, String>> list;       private ContentResolver cr;       private List<ImageView> imageViews = null;       HashMap<String,Object> hashMap;       public Bitmap bitmap;       public Bitmap newBit;     public void onCreate(Bundle savedInstanceState) 　　{        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        findimagepath();     }     public void findimagepath()      GridViewgridView=(GridView)findViewById(R.id.gridview);      list=newArrayList<HashMap<String,String>>();      cr=getContentResolver();      String[]imagedata={Thumbnails._ID,Thumbnails.IMAGE_ID,Thumbnails.DATA};//找到image      Cursorcursor=cr.query(Thumbnails.EXTERNAL_CONTENT_URI, imagedata, null,                     null,null);                                                                                                         //利用游标找image      String[] from = { "image_id", "path" };      int[] to = { R.id.textid, R.id.ItemImage };                                                               //在imageView.xml的布局中      getColumnData(cursor);      ListAdapteradapter = new picview(this, list, R.layout.imageitem,                            from,to);      gridView.setAdapter(adapter);    }//找到image的path，再放进list里。  private void getColumnData(Cursor cur) {     if(cur.moveToFirst())     {           int_id;           intimage_id;           Stringimage_path;           int_idColumn = cur.getColumnIndex(Thumbnails._ID);           intimage_idColumn = cur.getColumnIndex(Thumbnails.IMAGE_ID);           intdataColumn = cur.getColumnIndex(Thumbnails.DATA);           Log.i(TAG, String.valueOf(_idColumn)) ;           do{                            //Get the field values                            _id= cur.getInt(_idColumn);                            image_id= cur.getInt(image_idColumn);                            image_path= cur.getString(dataColumn);                            //Do something with the values.                            //Log.i(TAG, _id + " image_id:" + image_id + " path:"                            //+ image_path + "---");                            HashMap<String,String> hash = new HashMap<String, String>();                            hash.put("image_id",image_id + "");                            hash.put("path",image_path);                            list.add(hash);                     }                      while(cur.moveToNext());              }                    }          //很多时候GridView 是利用BaseAdapter来显示图片更多，BaseAdapter的图片资源多少来自drawable的资源。不过其实用SimpleAdapter就已经可以，        //重点是SimpleAdapter中有setViewImage这个方法。        class picview extends SimpleAdapter{　　　　     public picview(Context context, List<? extends Map<String, ?>> data,                            intresource, String[] from, int[] to) {                     super(context,data, resource, from, to);             }              /*               * Called by bindView() to set theimage for an ImageView but only if there is no existing ViewBinder or i               * f the existing ViewBinder cannothandle binding to an ImageView.               *  By default, the value will betreated as an image resource.                *  If the value cannot be used asan image resource, the value is used as an image Uri.               *   This method is called insteadof setViewImage(ImageView, int)                * if the supplied data is not an int orInteger.               * @ value为image的地址 即为path               * Parameters               * v  ImageView to receive an image           value  the value retrieved from the data set               */              public void setViewImage(ImageView v, String value)              {                     try                     {                            FileInputStreamfis = new FileInputStream(value);                            BufferedInputStreambis = new BufferedInputStream(fis);                            bitmap= BitmapFactory.decodeStream(bis);                            newBit= Bitmap.createScaledBitmap(bitmap, 180, 180, false);                            v.setImageBitmap(newBit);                            bis.close();                            fis.close();                     }                       catch (Exceptione)                     {                            Log.e(TAG,e.toString());                            v.setImageURI(Uri.parse(value));                     }              }                   }      }