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CameraView/docs/_posts/2018-12-20-debugging.md

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---
layout: page
title: "Debugging"
category: docs
Metering APIs (#580) * Add cameraPictureMetering and cameraPictureSnapshotMetering * Adapt Meter and metering package to picture use * Simplify Full2PictureRecorder, we'll use metering package instead * Add doMetering parameter * Implement cameraPictureMetering and cameraPictureSnapshotMetering in engine * Add options in demo app * Add better logs * Add Snapshot2PictureRecorder * Capture the correct frame based on timestamp * Lock AE and AWB. Account for captureBuilder changes * Fix runtime flash changes bug * Small changes * Flash support for metered snapshots * Remove AE and AWB locks * Lock AE/AWB/AF inside the snapshot recorder * Small changes * Fix AutoExposure metering * Create Locker and locking.* parameters * Implement Locker in Camera2Engine * Implement reset delay in Camera2Engine instead of Meter * Simplify Snapshot2PictureRecorder * Fix success value * Unlock inside Camera2Engine * Do not lock for normal gestures * Simplify logic * Improve locking/AutoFocus * Fix TORCH bug * Small changes to locking and metering * Remove AF and AWB for testing * Create action package * Create OneShotAction * Create LogAction * Revisit Full2VideoRecorder using actions * Revisit Full2PictureRecorder using actions * Enable missing functionality in Snapshot2PictureRecorder * Move Snapshot2PictureRecorder using actions, rewrite lock package * Add TimeoutAction * Add comments to the action package * Add meter package * Remove old metering package * Fix various bugs * Add action.abort() * Abort old MeterAction when running new ones * Fix various bugs * Add doc empty page * Add documentation * Fix tests
5 years ago
order: 15
date: 2018-12-20 20:02:38
6 years ago
disqus: 1
---
`CameraView` will log a lot of interesting events related to the camera lifecycle. These are important
to identify bugs. The default logger will simply use Android `Log` methods posting to logcat.
You can attach and detach external loggers using `CameraLogger.registerLogger()`:
```java
CameraLogger.registerLogger(new Logger() {
@Override
public void log(@LogLevel int level, String tag, String message, @Nullable Throwable throwable) {
// For example...
Crashlytics.log(message);
}
});
```
Make sure you enable the logger using `CameraLogger.setLogLevel(@LogLevel int)`. The default will only
log error events.