1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* Copyright (C) 2016 Google Inc.
*
* 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 com.google.android.mobly.snippet.util;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
public final class Log {
public static volatile String apkLogTag = null;
private static final String MY_CLASS_NAME = Log.class.getName();
private static final String ANDROID_LOG_CLASS_NAME = android.util.Log.class.getName();
// Skip the first two entries in stack trace when trying to infer the caller.
// The first two entries are:
// - dalvik.system.VMStack.getThreadStackTrace(Native Method)
// - java.lang.Thread.getStackTrace(Thread.java:580)
// The {@code getStackTrace()} function returns the stack trace at where the trace is collected
// (inisde the JNI function {@code getThreadStackTrace()} instead of at where the {@code
// getStackTrace()} is called (althrought this is the natual expectation).
private static final int STACK_TRACE_WALK_START_INDEX = 2;
private Log() {}
public static synchronized void initLogTag(Context context) {
if (apkLogTag != null) {
throw new IllegalStateException("Logger should not be re-initialized");
}
String packageName = context.getPackageName();
PackageManager packageManager = context.getPackageManager();
ApplicationInfo appInfo;
try {
appInfo = packageManager.getApplicationInfo(packageName, PackageManager.GET_META_DATA);
} catch (NameNotFoundException e) {
throw new IllegalStateException(
"Failed to find ApplicationInfo with package name: " + packageName);
}
Bundle bundle = appInfo.metaData;
apkLogTag = bundle.getString("mobly-log-tag");
if (apkLogTag == null) {
apkLogTag = packageName;
w(
"AndroidManifest.xml does not contain metadata field named \"mobly-log-tag\". "
+ "Using package name for logging instead.");
}
}
private static String getTag() {
String logTag = apkLogTag;
if (logTag == null) {
throw new IllegalStateException("Logging called before initLogTag()");
}
StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
boolean isCallerClassNameFound = false;
String fullClassName = null;
int lineNumber = 0;
// Walk up the stack and look for the first class name that is neither us nor
// android.util.Log: that's the caller.
// Do not used hard-coded stack depth: that does not work all the time because of proguard
// inline optimization.
for (int i = STACK_TRACE_WALK_START_INDEX; i < stackTraceElements.length; i++) {
StackTraceElement element = stackTraceElements[i];
fullClassName = element.getClassName();
if (!fullClassName.equals(MY_CLASS_NAME)
&& !fullClassName.equals(ANDROID_LOG_CLASS_NAME)) {
lineNumber = element.getLineNumber();
isCallerClassNameFound = true;
break;
}
}
if (!isCallerClassNameFound) {
// Failed to determine caller's class name, fall back the the minimal one.
return logTag;
} else {
String className = fullClassName.substring(fullClassName.lastIndexOf(".") + 1);
return logTag + "." + className + ":" + lineNumber;
}
}
public static void v(String message) {
android.util.Log.v(getTag(), message);
}
public static void v(String message, Throwable e) {
android.util.Log.v(getTag(), message, e);
}
public static void e(Throwable e) {
android.util.Log.e(getTag(), "Error", e);
}
public static void e(String message) {
android.util.Log.e(getTag(), message);
}
public static void e(String message, Throwable e) {
android.util.Log.e(getTag(), message, e);
}
public static void w(Throwable e) {
android.util.Log.w(getTag(), "Warning", e);
}
public static void w(String message) {
android.util.Log.w(getTag(), message);
}
public static void w(String message, Throwable e) {
android.util.Log.w(getTag(), message, e);
}
public static void d(String message) {
android.util.Log.d(getTag(), message);
}
public static void d(String message, Throwable e) {
android.util.Log.d(getTag(), message, e);
}
public static void i(String message) {
android.util.Log.i(getTag(), message);
}
public static void i(String message, Throwable e) {
android.util.Log.i(getTag(), message, e);
}
}
|
