Java tutorial
/* * Copyright (C) 2006 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.util; import android.annotation.UnsupportedAppUsage; import android.os.Build; /** * @hide */ public final class Slog { private Slog() { } @UnsupportedAppUsage public static int v(String tag, String msg) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.VERBOSE, tag, msg); } public static int v(String tag, String msg, Throwable tr) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.VERBOSE, tag, msg + '\n' + Log.getStackTraceString(tr)); } @UnsupportedAppUsage public static int d(String tag, String msg) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.DEBUG, tag, msg); } @UnsupportedAppUsage public static int d(String tag, String msg, Throwable tr) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.DEBUG, tag, msg + '\n' + Log.getStackTraceString(tr)); } @UnsupportedAppUsage public static int i(String tag, String msg) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.INFO, tag, msg); } public static int i(String tag, String msg, Throwable tr) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.INFO, tag, msg + '\n' + Log.getStackTraceString(tr)); } @UnsupportedAppUsage public static int w(String tag, String msg) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.WARN, tag, msg); } @UnsupportedAppUsage public static int w(String tag, String msg, Throwable tr) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.WARN, tag, msg + '\n' + Log.getStackTraceString(tr)); } public static int w(String tag, Throwable tr) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.WARN, tag, Log.getStackTraceString(tr)); } @UnsupportedAppUsage public static int e(String tag, String msg) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.ERROR, tag, msg); } @UnsupportedAppUsage public static int e(String tag, String msg, Throwable tr) { return Log.println_native(Log.LOG_ID_SYSTEM, Log.ERROR, tag, msg + '\n' + Log.getStackTraceString(tr)); } /** * Like {@link Log#wtf(String, String)}, but will never cause the caller to crash, and * will always be handled asynchronously. Primarily for use by coding running within * the system process. */ @UnsupportedAppUsage public static int wtf(String tag, String msg) { return Log.wtf(Log.LOG_ID_SYSTEM, tag, msg, null, false, true); } /** * Like {@link #wtf(String, String)}, but does not output anything to the log. */ public static void wtfQuiet(String tag, String msg) { Log.wtfQuiet(Log.LOG_ID_SYSTEM, tag, msg, true); } /** * Like {@link Log#wtfStack(String, String)}, but will never cause the caller to crash, and * will always be handled asynchronously. Primarily for use by coding running within * the system process. */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) public static int wtfStack(String tag, String msg) { return Log.wtf(Log.LOG_ID_SYSTEM, tag, msg, null, true, true); } /** * Like {@link Log#wtf(String, Throwable)}, but will never cause the caller to crash, * and will always be handled asynchronously. Primarily for use by coding running within * the system process. */ public static int wtf(String tag, Throwable tr) { return Log.wtf(Log.LOG_ID_SYSTEM, tag, tr.getMessage(), tr, false, true); } /** * Like {@link Log#wtf(String, String, Throwable)}, but will never cause the caller to crash, * and will always be handled asynchronously. Primarily for use by coding running within * the system process. */ @UnsupportedAppUsage public static int wtf(String tag, String msg, Throwable tr) { return Log.wtf(Log.LOG_ID_SYSTEM, tag, msg, tr, false, true); } @UnsupportedAppUsage public static int println(int priority, String tag, String msg) { return Log.println_native(Log.LOG_ID_SYSTEM, priority, tag, msg); } }