1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.example.android.mediabrowserservice.utils; 17 18 import android.util.Log; 19 20 import com.example.android.mediabrowserservice.BuildConfig; 21 22 public class LogHelper { 23 private static final String LOG_PREFIX = "sample_"; 24 private static final int LOG_PREFIX_LENGTH = LOG_PREFIX.length(); 25 private static final int MAX_LOG_TAG_LENGTH = 23; 26 27 public static String makeLogTag(String str) { 28 if (str.length() > MAX_LOG_TAG_LENGTH - LOG_PREFIX_LENGTH) { 29 return LOG_PREFIX + str.substring(0, MAX_LOG_TAG_LENGTH - LOG_PREFIX_LENGTH - 1); 30 } 31 32 return LOG_PREFIX + str; 33 } 34 35 public static void v(String tag, Object... messages) { 36 // Only log VERBOSE if build type is DEBUG 37 if (BuildConfig.DEBUG) { 38 log(tag, Log.VERBOSE, null, messages); 39 } 40 } 41 42 public static void d(String tag, Object... messages) { 43 // Only log DEBUG if build type is DEBUG 44 if (BuildConfig.DEBUG) { 45 log(tag, Log.DEBUG, null, messages); 46 } 47 } 48 49 public static void i(String tag, Object... messages) { 50 log(tag, Log.INFO, null, messages); 51 } 52 53 public static void w(String tag, Object... messages) { 54 log(tag, Log.WARN, null, messages); 55 } 56 57 public static void w(String tag, Throwable t, Object... messages) { 58 log(tag, Log.WARN, t, messages); 59 } 60 61 public static void e(String tag, Object... messages) { 62 log(tag, Log.ERROR, null, messages); 63 } 64 65 public static void e(String tag, Throwable t, Object... messages) { 66 log(tag, Log.ERROR, t, messages); 67 } 68 69 public static void log(String tag, int level, Throwable t, Object... messages) { 70 if (messages != null && Log.isLoggable(tag, level)) { 71 String message; 72 if (messages.length == 1) { 73 message = messages[0] == null ? null : messages[0].toString(); 74 } else { 75 StringBuilder sb = new StringBuilder(); 76 for (Object m: messages) { 77 sb.append(m); 78 } 79 if (t != null) { 80 sb.append("\n").append(Log.getStackTraceString(t)); 81 } 82 message = sb.toString(); 83 } 84 Log.println(level, tag, message); 85 } 86 } 87 } 88
