Retrieve logcat log
To read logcat once you can execute:
val log = adb.execute(
request = SyncLogcatRequest(
since = Instant.now().minusSeconds(60),
filters = listOf(LogcatFilterSpec("TAG", LogcatVerbosityLevel.E))
),
serial = "emulator-5554"
)
SyncLogcatRequest maps most of the options exposed by the underlying logcat command:
class SyncLogcatRequest(
since: Instant? = null,
modes: List<LogcatReadMode> = listOf(LogcatReadMode.long),
buffers: List<LogcatBuffer> = listOf(LogcatBuffer.default),
pid: Long? = null,
lastReboot: Boolean? = null,
filters: List<LogcatFilterSpec> = emptyList()
)
Stream logcat output
Recording the output from logcat (for example when writing to a file):
launch {
val channel = adb.execute(
request = ChanneledLogcatRequest(),
scope = this,
serial = "emulator-5554"
)
val logcatChunk = channel.receive()
//logcatChunk == "I/ActivityManager( 585): Starting activity: Intent { action=android.intent.action...}\nI/MyActivity( 1557): MyClass"
//write to a file or append to a buffer
//Dispose of channel to close the resources
channel.cancel()
}
Logcat chunks that you receive might not be \n terminated so if you need to parse logcat output line-by-line then you need to accumulate the chunks in a buffer first.
ChanneledLogcatRequest maps most of the options exposed by the underlying logcat command:
class ChanneledLogcatRequest(
since: Instant? = null,
modes: List<LogcatReadMode> = listOf(LogcatReadMode.long),
buffers: List<LogcatBuffer> = emptyList(),
pid: Long? = null,
lastReboot: Boolean? = null,
filters: List<LogcatFilterSpec> = emptyList()
)
See the official docs for more info on what these options change.