週末のAndroidでのソーシャルネットワーク-パートI（クライアント）

public View getView(int position, View convertView, ViewGroup parent) { ... holder.imgView.setHeightRatio(feedEntry.image.ratio); holder.imgView.setTag(pos); mImageLoader.get(feedEntry.image.url_medium, new ImageListener(pos, holder.imgView, null)); ... } 

 public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) { final int height = options.outHeight; final int width = options.outWidth; int inSampleSize = 1; if (height > reqHeight || width > reqWidth) { final int halfHeight = height / 2; final int halfWidth = width / 2; while (((halfHeight / inSampleSize) > reqHeight) || ((halfWidth / inSampleSize) > reqWidth)) { inSampleSize *= 2; } } return inSampleSize; } public static Bitmap decodeSampledBitmap(String imgPath, int reqWidth, int reqHeight) { final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile(imgPath, options); options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); options.inJustDecodeBounds = false; return BitmapFactory.decodeFile(imgPath, options); } 

  public String getThumbURI(String strMediaStoreID) { ContentResolver cr = mContext.getContentResolver(); String strThumbUri = ""; Cursor cursorThumb = cr.query(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, new String[]{MediaStore.Images.Thumbnails.DATA}, MediaStore.Images.Thumbnails.IMAGE_ID + "= ?", new String[]{strMediaStoreID}, null); if( cursorThumb != null && cursorThumb.getCount() > 0 ) { cursorThumb.moveToFirst(); strThumbUri = cursorThumb.getString( cursorThumb.getColumnIndex( MediaStore.Images.Thumbnails.DATA )); } cursorThumb.close(); return strThumbUri; } 

  public static final void getUserProfileRequest (Context context, String[] userIds, final Response.Listener<HashMap<String, UserProfile>> responseListener, final Response.ErrorListener errorListener) { HashMap<String, String> headers = makeHTTPHeaders(); String strIdHeader = userIds.length > 0 ? userIds[0] : ""; for (int i = 1; i < userIds.length; i++) strIdHeader = strIdHeader + "," + userIds[i]; headers.put(Constants.KEY_ID, strIdHeader); Log.d(LOG_TAG, "Get user profile request"); StringRequest request = new StringRequest(Request.Method.GET, Constants.SERVER_URL + Constants.SERVER_PATH_USER, "", headers, new Response.Listener<String>() { @Override public void onResponse(String response) { Log.d(LOG_TAG, response); Type type = new TypeToken<ServerResponse <HashMap<String, UserProfile>>>(){}.getType(); try { ServerResponse<HashMap<String, UserProfile>> res = gson.fromJson(response, type); if (res != null && res.isSuccess() && res.data != null && responseListener != null) responseListener.onResponse(res.data); else if (responseListener != null) responseListener.onResponse(new HashMap<String, UserProfile>()); } catch (Exception e) { if (responseListener != null) responseListener.onResponse(new HashMap<String, UserProfile>()); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { if ((error != null) && (error.networkResponse != null) && (error.networkResponse.data != null)) Log.d(LOG_TAG, "Error: " + new String(error.networkResponse.data)); if (errorListener != null) errorListener.onErrorResponse(error); } } ); VolleySingleton.getInstance(context).addToRequestQueue(request); } 

 public class VolleySingleton { ... public <T> void addToRequestQueue(Request<T> req) { int socketTimeout = 90000; RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT); req.setRetryPolicy(policy); getRequestQueue().add(req); } ... } 

 public class FriendsDataSource { private SQLiteDatabase database; private SQLiteHelper dbHelper; private String[] allColumns = { SQLiteHelper.COLUMN_ID,SQLiteHelper.COLUMN_NAME, SQLiteHelper.COLUMN_CONTACT_KEY, SQLiteHelper.COLUMN_USER_ID, SQLiteHelper.COLUMN_AVATAR, SQLiteHelper.COLUMN_STATUS}; ... public FriendEntry createFriend(String Name, String ContactKey, String UserId, String Avatar, int Status) { //Add new FriendEntry ContentValues cv = new ContentValues(); cv.put(dbHelper.COLUMN_CONTACT_KEY,ContactKey); cv.put(dbHelper.COLUMN_NAME,Name); cv.put(dbHelper.COLUMN_USER_ID,UserId); cv.put(dbHelper.COLUMN_AVATAR,Avatar); cv.put(dbHelper.COLUMN_STATUS,Status); cv.put(dbHelper.COLUMN_TYPE,FriendEntry.INT_TYPE_PERSON); database.insert(dbHelper.TABLE_FRIENDS, null, cv); return null; } public ArrayList<FriendEntry> getFriendsByStatus(int StatusSet[]) { String selection = dbHelper.COLUMN_STATUS + " IN (?"; String values[] = new String[StatusSet.length]; values[0] = String.valueOf(StatusSet[0]); for (int i = 1; i < StatusSet.length; i++) { selection = selection + ",?"; values[i] = String.valueOf(StatusSet[i]); } selection = selection + ") "; selection = selection + " AND " + SQLiteHelper.COLUMN_TYPE + " = " + FriendEntry.INT_TYPE_PERSON; String orderBy = SQLiteHelper.COLUMN_NAME + " ASC"; Cursor cursor = database.query(dbHelper.TABLE_FRIENDS, null, selection, values, null, null, orderBy); ArrayList<FriendEntry> listFriends = new ArrayList<FriendEntry>(); if (cursor == null) { return listFriends; } else if (!cursor.moveToFirst()) { cursor.close(); return listFriends; } do{ listFriends.add(cursorToFriendEntry(cursor)); }while (cursor.moveToNext()); cursor.close(); return listFriends; } private FriendEntry cursorToFriendEntry(Cursor cursor) { FriendEntry friend = new FriendEntry(); friend.setId(cursor.getInt(idColIndex)); friend.setName(cursor.getString(nameColIndex)); friend.setUserId(cursor.getString(userIdColIndex)); friend.setAvatar(cursor.getString(avatarColIndex)); friend.setStatus(cursor.getInt(statusColIndex)); friend.setType(cursor.getInt(typeColIndex)); friend.setContactKey(cursor.getString(ContactKeyColIndex)); return friend; } ... }