Java tutorial
/* * Copyright (C) 2011 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 android.support.v4.util; import android.util.Log; import java.io.Writer; /** * Helper for accessing features in {@link android.util.LogWriter} * introduced after API level 4 in a backwards compatible fashion. * * @hide */ public class LogWriter extends Writer { private final String mTag; private StringBuilder mBuilder = new StringBuilder(128); /** * Create a new Writer that sends to the log with the given priority * and tag. * * @param tag A string tag to associate with each printed log statement. */ public LogWriter(String tag) { mTag = tag; } @Override public void close() { flushBuilder(); } @Override public void flush() { flushBuilder(); } @Override public void write(char[] buf, int offset, int count) { for (int i = 0; i < count; i++) { char c = buf[offset + i]; if (c == '\n') { flushBuilder(); } else { mBuilder.append(c); } } } private void flushBuilder() { if (mBuilder.length() > 0) { Log.d(mTag, mBuilder.toString()); mBuilder.delete(0, mBuilder.length()); } } }