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getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {

   @Override

   public void onItemClick(AdapterView<?> parent, View view, 

      try {

         Cursor cursor = (Cursor) getListAdapter().getItem(position);

         if (cursor == 

            return;

         }

         int contactId = cursor.getInt(Personal.ID_COLUMN_INDEX);

         intent.setClass(ContactsList.this, ContactDetail.class);

         intent.putExtra("contactId",contactId);

         startActivity(intent);

      }catch(Exception ex) {

         ex.printStackTrace();

      }

   }

});

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public class ContactDetail extends Activity {

    private ImageView contact_photo;

    public static void startActivity(Context context) {

        Intent intent = new Intent();

        intent.setClass(context,ContactDetail.class);

        context.startActivity(intent);

    }

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.contact_detail);

        int contactId = getIntent().getIntExtra("contactId", 0);

        contact_photo = (ImageView)findViewById(R.id.contact_photo);

        loadTask task = new loadTask(contactId);

        task.execute();

    }

    private class loadTask extends AsyncTask<Void, Void, Bitmap> {

        public loadTask(int id) {

            contactId = id;

        }

        private int contactId;

        @Override

        protected Bitmap doInBackground(Void... params) {

            InputStream inputStream = openDisplayPhoto(contactId);

            BitmapFactory.Options opt = new BitmapFactory.Options();

            opt.inSampleSize = 1;

            Bitmap bitmap = BitmapFactory.decodeStream(inputStream, null, opt);

            return bitmap;

        }

        @Override

        protected void onPostExecute(Bitmap result) {

            if(result != null) {

                contact_photo.setImageBitmap(result);

            }

            super.onPostExecute(result);

        }

    }

    /**

     * 這個是取到清晰圖的inputStream的程式碼

     * @param contactId

     * @return

     */

    public InputStream openDisplayPhoto(long contactId) {

        Uri contactUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, contactId);

        Uri displayPhotoUri = Uri.withAppendedPath(contactUri, ContactsContract.Contacts.Photo.DISPLAY_PHOTO);

        try {

            AssetFileDescriptor fd =

                    this.getContentResolver().openAssetFileDescriptor(displayPhotoUri, "r");

            return fd.createInputStream();

        } catch (IOException e) {

            e.printStackTrace();

            return null;

        }

    }

}