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.util; 18 19 import android.annotation.UnsupportedAppUsage; 20 import java.io.Writer; 21 22 /** @hide */ 23 public class LogWriter extends Writer { 24 private final int mPriority; 25 private final String mTag; 26 private final int mBuffer; 27 private StringBuilder mBuilder = new StringBuilder(128); 28 29 /** 30 * Create a new Writer that sends to the log with the given priority 31 * and tag. 32 * 33 * @param priority The desired log priority: 34 * {@link android.util.Log#VERBOSE Log.VERBOSE}, 35 * {@link android.util.Log#DEBUG Log.DEBUG}, 36 * {@link android.util.Log#INFO Log.INFO}, 37 * {@link android.util.Log#WARN Log.WARN}, or 38 * {@link android.util.Log#ERROR Log.ERROR}. 39 * @param tag A string tag to associate with each printed log statement. 40 */ 41 @UnsupportedAppUsage 42 public LogWriter(int priority, String tag) { 43 mPriority = priority; 44 mTag = tag; 45 mBuffer = Log.LOG_ID_MAIN; 46 } 47 48 /** 49 * @hide 50 * Same as above, but buffer is one of the LOG_ID_ constants from android.util.Log. 51 */ 52 public LogWriter(int priority, String tag, int buffer) { 53 mPriority = priority; 54 mTag = tag; 55 mBuffer = buffer; 56 } 57 58 @Override public void close() { 59 flushBuilder(); 60 } 61 62 @Override public void flush() { 63 flushBuilder(); 64 } 65 66 @Override public void write(char[] buf, int offset, int count) { 67 for(int i = 0; i < count; i++) { 68 char c = buf[offset + i]; 69 if ( c == '\n') { 70 flushBuilder(); 71 } 72 else { 73 mBuilder.append(c); 74 } 75 } 76 } 77 78 private void flushBuilder() { 79 if (mBuilder.length() > 0) { 80 Log.println_native(mBuffer, mPriority, mTag, mBuilder.toString()); 81 mBuilder.delete(0, mBuilder.length()); 82 } 83 } 84 } 85
