Log Class
Definition
Important
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API for sending log output.
[Android.Runtime.Register("android/util/Log", DoNotGenerateAcw=true)]
public sealed class Log : Java.Lang.Object[<Android.Runtime.Register("android/util/Log", DoNotGenerateAcw=true)>]
type Log = class
inherit Object- Inheritance
- Attributes
Remarks
API for sending log output.
Generally, you should use the #v Log.v(), #d Log.d(), #i Log.i(), #w Log.w(), and #e Log.e() methods to write logs. You can then view the logs in logcat.
The order in terms of verbosity, from least to most is ERROR, WARN, INFO, DEBUG, VERBOSE.
<b>Tip:</b> A good convention is to declare a TAG constant in your class:
private static final String TAG = "MyActivity";
and use that in subsequent calls to the log methods. </p>
<b>Tip:</b> Don't forget that when you make a call like
Log.v(TAG, "index=" + i);
that when you're building the string to pass into Log.d, the compiler uses a StringBuilder and at least three allocations occur: the StringBuilder itself, the buffer, and the String object. Realistically, there is also another buffer allocation and copy, and even more pressure on the gc. That means that if your log message is filtered out, you might be doing significant work and incurring significant overhead.
When calling the log methods that take a Throwable parameter, if any of the throwables in the cause chain is an UnknownHostException, then the stack trace is not logged.
Note: The return value from the logging functions in this class may vary between Android releases due to changes in the logging implementation. For the methods that return an integer, a positive value may be considered as a successful invocation.
Java documentation for android.util.Log.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Properties
| Class |
Returns the runtime class of this |
| FormatProvider |
IFormatProvider passed to any underlying string.Format() calls. Defaults to System.Globalization.CultureInfo.CurrentCulture. |
| Handle |
The handle to the underlying Android instance. (Inherited from Object) |
| JniIdentityHashCode | (Inherited from Object) |
| JniPeerMembers | |
| PeerReference | (Inherited from Object) |
| ThresholdClass |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. (Inherited from Object) |
| ThresholdType |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. (Inherited from Object) |
Methods
| Clone() |
Creates and returns a copy of this object. (Inherited from Object) |
| Debug(String, String, Object[]) | |
| Debug(String, String) |
Send a |
| Debug(String, Throwable, String, Object[]) | |
| Debug(String, Throwable, String) | |
| Dispose() | (Inherited from Object) |
| Dispose(Boolean) | (Inherited from Object) |
| Equals(Object) |
Indicates whether some other object is "equal to" this one. (Inherited from Object) |
| Error(String, String, Object[]) | |
| Error(String, String) |
Send an |
| Error(String, Throwable, String, Object[]) | |
| Error(String, Throwable, String) | |
| GetHashCode() |
Returns a hash code value for the object. (Inherited from Object) |
| GetStackTraceString(Throwable) |
Handy function to get a loggable stack trace from a Throwable |
| Info(String, String, Object[]) | |
| Info(String, String) |
Send an |
| Info(String, Throwable, String, Object[]) | |
| Info(String, Throwable, String) | |
| IsLoggable(String, LogPriority) |
Checks to see whether or not a log for the specified tag is loggable at the specified level. |
| JavaFinalize() |
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object) |
| Notify() |
Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object) |
| NotifyAll() |
Wakes up all threads that are waiting on this object's monitor. (Inherited from Object) |
| SetHandle(IntPtr, JniHandleOwnership) |
Sets the Handle property. (Inherited from Object) |
| ToArray<T>() | (Inherited from Object) |
| ToString() |
Returns a string representation of the object. (Inherited from Object) |
| UnregisterFromRuntime() | (Inherited from Object) |
| Verbose(String, String, Object[]) | |
| Verbose(String, String) |
Send a |
| Verbose(String, Throwable, String, Object[]) | |
| Verbose(String, Throwable, String) | |
| Wait() |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object) |
| Wait(Int64, Int32) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
| Wait(Int64) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
| Warn(String, String, Object[]) | |
| Warn(String, String) |
Send a |
| Warn(String, Throwable, String, Object[]) | |
| Warn(String, Throwable, String) | |
| Warn(String, Throwable) |
Send a |
| WriteLine(LogPriority, String, String, Object[]) | |
| WriteLine(LogPriority, String, String) |
Low-level logging call. |
| Wtf(String, String, Object[]) | |
| Wtf(String, String) |
What a Terrible Failure: Report a condition that should never happen. |
| Wtf(String, Throwable, String, Object[]) | |
| Wtf(String, Throwable, String) | |
| Wtf(String, Throwable) |
What a Terrible Failure: Report an exception that should never happen. |
Explicit Interface Implementations
| IJavaPeerable.Disposed() | (Inherited from Object) |
| IJavaPeerable.DisposeUnlessReferenced() | (Inherited from Object) |
| IJavaPeerable.Finalized() | (Inherited from Object) |
| IJavaPeerable.JniManagedPeerState | (Inherited from Object) |
| IJavaPeerable.SetJniIdentityHashCode(Int32) | (Inherited from Object) |
| IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates) | (Inherited from Object) |
| IJavaPeerable.SetPeerReference(JniObjectReference) | (Inherited from Object) |
Extension Methods
| JavaCast<TResult>(IJavaObject) |
Performs an Android runtime-checked type conversion. |
| JavaCast<TResult>(IJavaObject) | |
| GetJniTypeName(IJavaPeerable) |
Gets the JNI name of the type of the instance |
| JavaAs<TResult>(IJavaPeerable) |
Try to coerce |
| TryJavaCast<TResult>(IJavaPeerable, TResult) |
Try to coerce |