| 1 | /* |
| 2 | * Copyright (C) 2011 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 | |
| 17 | package android.support.v2.util; |
| 18 | |
| 19 | import android.util.Log; |
| 20 | |
| 21 | import java.io.Writer; |
| 22 | |
| 23 | /** |
| 24 | * Useful logging utility that is not available on all versions of Android. |
| 25 | */ |
| 26 | public class LogWriter extends Writer { |
| 27 | private final String mTag; |
| 28 | private StringBuilder mBuilder = new StringBuilder(128); |
| 29 | |
| 30 | /** |
| 31 | * Create a new Writer that sends to the log with the given priority |
| 32 | * and tag. |
| 33 | * |
| 34 | * @param priority The desired log priority: |
| 35 | * {@link android.util.Log#VERBOSE Log.VERBOSE}, |
| 36 | * {@link android.util.Log#DEBUG Log.DEBUG}, |
| 37 | * {@link android.util.Log#INFO Log.INFO}, |
| 38 | * {@link android.util.Log#WARN Log.WARN}, or |
| 39 | * {@link android.util.Log#ERROR Log.ERROR}. |
| 40 | * @param tag A string tag to associate with each printed log statement. |
| 41 | */ |
| 42 | public LogWriter(String tag) { |
| 43 | mTag = tag; |
| 44 | } |
| 45 | |
| 46 | @Override public void close() { |
| 47 | flushBuilder(); |
| 48 | } |
| 49 | |
| 50 | @Override public void flush() { |
| 51 | flushBuilder(); |
| 52 | } |
| 53 | |
| 54 | @Override public void write(char[] buf, int offset, int count) { |
| 55 | for(int i = 0; i < count; i++) { |
| 56 | char c = buf[offset + i]; |
| 57 | if ( c == '\n') { |
| 58 | flushBuilder(); |
| 59 | } |
| 60 | else { |
| 61 | mBuilder.append(c); |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | private void flushBuilder() { |
| 67 | if (mBuilder.length() > 0) { |
| 68 | Log.d(mTag, mBuilder.toString()); |
| 69 | mBuilder.delete(0, mBuilder.length()); |
| 70 | } |
| 71 | } |
| 72 | } |