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expose battery percentage

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This commit is contained in:
Martin Ptáček
2023-04-18 13:25:54 +02:00
parent 6b7332cd23
commit 8c372e9f2a
3 changed files with 45 additions and 33 deletions
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36
client/app/src/main/java/com/birdthedeveloper/prometheus/android/prometheus/android/exporter/AndroidCustomExporter.kt
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@ -7,35 +7,27 @@ import kotlinx.coroutines.runBlocking
import java.util.Arrays import java.util.Arrays
import kotlinx.coroutines.* import kotlinx.coroutines.*
class AndroidCustomExporter(name: String) : Collector() { class AndroidCustomExporter(metricEngine: MetricsEngine) : Collector() {
private val metricsEngineRef = metricEngine
//TODO pass context here, get baterry percentage from metrics engine
override fun collect(): List<MetricFamilySamples> { override fun collect(): List<MetricFamilySamples> {
val mfs: MutableList<MetricFamilySamples> = ArrayList() val mfs: MutableList<MetricFamilySamples> = ArrayList()
// With no labels.
mfs.add(GaugeMetricFamily("my_gauge", "help", 42.0)) // metrics definitions
// With labels collectBatteryStatus(mfs)
val labeledGauge = GaugeMetricFamily("my_other_gauge", "help", Arrays.asList("labelname"))
labeledGauge.addMetric(listOf("foo"), 4.0)
labeledGauge.addMetric(listOf("bar"), 5.0)
mfs.add(labeledGauge)
println("Start blocking")
return mfs return mfs
} }
fun collectBaterryStatus(mfs: MutableList<MetricFamilySamples>) { fun collectBatteryStatus(mfs: MutableList<MetricFamilySamples>) {
//TODO //TODO
val baterryPercentageGauge = GaugeMetricFamily( val batteryPercentageGauge = GaugeMetricFamily(
"baterry_percentage", "battery_percentage",
"Baterry percentage", listOf(), "Current battery percentage", listOf(),
) )
val batteryPercentage : Double = metricsEngineRef.getBatteryPercentage().toDouble()
batteryPercentageGauge.addMetric(listOf(), batteryPercentage)
//baterryPercentageGauge.addMetric() mfs.add(batteryPercentageGauge)
} }
}
}

15
client/app/src/main/java/com/birdthedeveloper/prometheus/android/prometheus/android/exporter/MainActivity.kt
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@ -1,6 +1,7 @@
package com.birdthedeveloper.prometheus.android.prometheus.android.exporter package com.birdthedeveloper.prometheus.android.prometheus.android.exporter
import android.os.Bundle import android.os.Bundle
import android.text.BoringLayout.Metrics
import androidx.activity.ComponentActivity import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.fillMaxSize import androidx.compose.foundation.layout.fillMaxSize
@ -22,13 +23,14 @@ import java.io.StringWriter
class MainActivity : ComponentActivity() { class MainActivity : ComponentActivity() {
// register custom prometheus exporter private val collectorRegistry: CollectorRegistry = CollectorRegistry()
val collectorRegistry: CollectorRegistry = CollectorRegistry() private lateinit var metricsEngine: MetricsEngine
val customExporter: AndroidCustomExporter = AndroidCustomExporter("dummy") private lateinit var customExporter: AndroidCustomExporter
.register(collectorRegistry)
override fun onCreate(savedInstanceState: Bundle?) { override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState) super.onCreate(savedInstanceState)
initialize()
setContent { setContent {
PrometheusAndroidExporterTheme { PrometheusAndroidExporterTheme {
// A surface container using the 'background' color from the theme // A surface container using the 'background' color from the theme
@ -42,6 +44,11 @@ class MainActivity : ComponentActivity() {
} }
} }
private fun initialize (){
metricsEngine = MetricsEngine(this.applicationContext)
customExporter = AndroidCustomExporter(metricsEngine).register(collectorRegistry)
}
fun CollectMetrics(): String{ fun CollectMetrics(): String{
val writer = StringWriter() val writer = StringWriter()
TextFormat.write004(writer, collectorRegistry.metricFamilySamples()) TextFormat.write004(writer, collectorRegistry.metricFamilySamples())

27
client/app/src/main/java/com/birdthedeveloper/prometheus/android/prometheus/android/exporter/MetricsEngine.kt
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@ -1,12 +1,25 @@
package com.birdthedeveloper.prometheus.android.prometheus.android.exporter package com.birdthedeveloper.prometheus.android.prometheus.android.exporter
import android.content.Context
import android.content.Intent import android.content.Intent
import android.content.IntentFilter import android.content.IntentFilter
import android.os.BatteryManager
class MetricsEngine { class MetricsEngine(context: Context) {
// public fun getBatteryPercentage(){ private val contextRef = context
// val batteryStatus: Intent? = IntentFilter(Intent.ACTION_BATTERY_CHANGED).let { ifilter -> public fun getBatteryPercentage() : Float{
// context.registerReceiver(null, ifilter) val batteryStatus: Intent? = IntentFilter(Intent.ACTION_BATTERY_CHANGED).let { intFilter ->
// } contextRef.registerReceiver(null, intFilter)
// } }
} //val status: Int = batteryStatus?.getIntExtra(BatteryManager.EXTRA_STATUS, -1) ?: -1
val batteryPct: Float? = batteryStatus?.let { intent ->
val level: Int = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1)
val scale: Int = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1)
level * 100 / scale.toFloat()
}
batteryPct?: return -1.0f
return batteryPct
}
}