| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.automessagingdemo; |
| |
| import android.content.Context; |
| import android.content.SharedPreferences; |
| |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| |
| /** |
| * A simple logger that uses shared preferences to log messages, their reads |
| * and replies. Don't use this in a real world application. This logger is only |
| * used for displaying the messages in the text view. |
| */ |
| public class MessageLogger { |
| |
| private static final String PREF_MESSAGE = "MESSAGE_LOGGER"; |
| private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); |
| |
| public static final String LOG_KEY = "message_data"; |
| public static final String LINE_BREAKS = "\n\n"; |
| |
| public static void logMessage(Context context, String message) { |
| SharedPreferences prefs = getPrefs(context); |
| message = DATE_FORMAT.format(new Date(System.currentTimeMillis())) + ": " + message; |
| prefs.edit() |
| .putString(LOG_KEY, prefs.getString(LOG_KEY, "") + LINE_BREAKS + message) |
| .apply(); |
| } |
| |
| public static SharedPreferences getPrefs(Context context) { |
| return context.getSharedPreferences(PREF_MESSAGE, Context.MODE_PRIVATE); |
| } |
| |
| public static String getAllMessages(Context context) { |
| return getPrefs(context).getString(LOG_KEY, ""); |
| } |
| |
| public static void clear(Context context) { |
| getPrefs(context).edit().remove(LOG_KEY).apply(); |
| } |
| } |