BroadcastsObserver.kt
/*
* Copyright 2021 The Android Open Source Project
*
* 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 androidx.wear.watchface
import android.content.Intent
import androidx.annotation.RestrictTo
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Deferred
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.launch
/** @hide */
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public class BroadcastsObserver(
private val watchState: WatchState,
private val watchFaceHostApi: WatchFaceHostApi,
private val deferredWatchFaceImpl: Deferred<WatchFaceImpl>,
private val uiThreadCoroutineScope: CoroutineScope
) : BroadcastsReceiver.BroadcastEventObserver {
private var batteryLow: Boolean? = null
private var charging: Boolean? = null
override fun onActionTimeTick() {
// android.intent.action.TIME_TICK is sent by the system when the watch is ambient, usually
// once per minute at the time of the minute to trigger updates. When the watch is
// non-ambient the library is in charge of animation and this signal can be ignored.
if (watchState.isAmbient.value == false) {
watchFaceHostApi.invalidate()
}
}
override fun onActionTimeZoneChanged() {
uiThreadCoroutineScope.launch {
deferredWatchFaceImpl.await().onActionTimeZoneChanged()
}
}
override fun onActionTimeChanged() {
uiThreadCoroutineScope.launch {
deferredWatchFaceImpl.await().onActionTimeChanged()
}
}
override fun onActionBatteryLow() {
batteryLow = true
if (charging == false) {
updateBatteryLowAndNotChargingStatus(true)
}
}
override fun onActionBatteryOkay() {
batteryLow = false
updateBatteryLowAndNotChargingStatus(false)
}
override fun onActionPowerConnected() {
charging = true
updateBatteryLowAndNotChargingStatus(false)
}
override fun onActionPowerDisconnected() {
charging = false
if (batteryLow == true) {
updateBatteryLowAndNotChargingStatus(true)
}
}
override fun onMockTime(intent: Intent) {
uiThreadCoroutineScope.launch {
deferredWatchFaceImpl.await().onMockTime(intent)
}
}
private fun updateBatteryLowAndNotChargingStatus(value: Boolean) {
val isBatteryLowAndNotCharging =
watchState.isBatteryLowAndNotCharging as MutableStateFlow
if (!isBatteryLowAndNotCharging.hasValue() || value != isBatteryLowAndNotCharging.value) {
isBatteryLowAndNotCharging.value = value
watchFaceHostApi.invalidate()
}
}
}