Merge "Fix OOM of metro clock" into udc-qpr-dev am: d756cad817

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23785706

Change-Id: I51cb03c7ab493ba61c5daaffe880c9abaff7bf04
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

packages/SystemUI/src/com/android/keyguard/ClockEventController.kt

@@ -26,6 +26,7 @@ import android.util.TypedValue
 import android.view.View
 import android.view.View.OnAttachStateChangeListener
 import android.view.ViewTreeObserver
+import android.view.ViewTreeObserver.OnGlobalLayoutListener
 import android.widget.FrameLayout
 import androidx.annotation.VisibleForTesting
 import androidx.lifecycle.Lifecycle
@@ -88,6 +89,15 @@ constructor(
 ) {
     var clock: ClockController? = null
         set(value) {
+            smallClockOnAttachStateChangeListener?.let {
+                field?.smallClock?.view?.removeOnAttachStateChangeListener(it)
+                smallClockFrame?.viewTreeObserver
+                        ?.removeOnGlobalLayoutListener(onGlobalLayoutListener)
+            }
+            largeClockOnAttachStateChangeListener?.let {
+                field?.largeClock?.view?.removeOnAttachStateChangeListener(it)
+            }
+
             field = value
             if (value != null) {
                 smallLogBuffer?.log(TAG, DEBUG, {}, { "New Clock" })
@@ -130,44 +140,62 @@ constructor(
                     }
                     value.events.onWeatherDataChanged(it)
                 }
-                value.smallClock.view.addOnAttachStateChangeListener(
+
+                smallClockOnAttachStateChangeListener =
                     object : OnAttachStateChangeListener {
                         var pastVisibility: Int? = null
                         override fun onViewAttachedToWindow(view: View?) {
                             value.events.onTimeFormatChanged(DateFormat.is24HourFormat(context))
                             if (view != null) {
-                                val smallClockFrame = view.parent as FrameLayout
+                                smallClockFrame = view.parent as FrameLayout
-                                pastVisibility = smallClockFrame.visibility
+                                smallClockFrame?.let {frame ->
-                                smallClockFrame.viewTreeObserver.addOnGlobalLayoutListener(
+                                    pastVisibility = frame.visibility
-                                        ViewTreeObserver.OnGlobalLayoutListener {
+                                    onGlobalLayoutListener = OnGlobalLayoutListener {
-                                    val currentVisibility = smallClockFrame.visibility
+                                        val currentVisibility = frame.visibility
                                         if (pastVisibility != currentVisibility) {
                                             pastVisibility = currentVisibility
-                                        // when small clock  visible, recalculate bounds and sample
+                                            // when small clock  visible,
+                                            // recalculate bounds and sample
                                             if (currentVisibility == View.VISIBLE) {
                                                 smallRegionSampler?.stopRegionSampler()
                                                 smallRegionSampler?.startRegionSampler()
                                             }
                                         }
-                                })
+                                    }
+                                    frame.viewTreeObserver
+                                            .addOnGlobalLayoutListener(onGlobalLayoutListener)
+                                }
                             }
                         }
 
                         override fun onViewDetachedFromWindow(p0: View?) {
+                            smallClockFrame?.viewTreeObserver
+                                    ?.removeOnGlobalLayoutListener(onGlobalLayoutListener)
                         }
-                })
+                }
-                value.largeClock.view.addOnAttachStateChangeListener(
+                value.smallClock.view
+                        .addOnAttachStateChangeListener(smallClockOnAttachStateChangeListener)
+
+                largeClockOnAttachStateChangeListener =
                     object : OnAttachStateChangeListener {
                         override fun onViewAttachedToWindow(p0: View?) {
                             value.events.onTimeFormatChanged(DateFormat.is24HourFormat(context))
                         }
-
                         override fun onViewDetachedFromWindow(p0: View?) {
                         }
-                })
+                }
+                value.largeClock.view
+                        .addOnAttachStateChangeListener(largeClockOnAttachStateChangeListener)
             }
         }
 
+    @VisibleForTesting
+    var smallClockOnAttachStateChangeListener: OnAttachStateChangeListener? = null
+    @VisibleForTesting
+    var largeClockOnAttachStateChangeListener: OnAttachStateChangeListener? = null
+    private var smallClockFrame: FrameLayout? = null
+    private var onGlobalLayoutListener: OnGlobalLayoutListener? = null
+
     private var isDozing = false
         private set
 
@@ -307,7 +335,6 @@ constructor(
             return
         }
         isRegistered = true
-
         broadcastDispatcher.registerReceiver(
             localeBroadcastReceiver,
             IntentFilter(Intent.ACTION_LOCALE_CHANGED)
@@ -346,6 +373,12 @@ constructor(
         largeRegionSampler?.stopRegionSampler()
         smallTimeListener?.stop()
         largeTimeListener?.stop()
+        clock?.smallClock?.view
+                ?.removeOnAttachStateChangeListener(smallClockOnAttachStateChangeListener)
+        smallClockFrame?.viewTreeObserver
+                ?.removeOnGlobalLayoutListener(onGlobalLayoutListener)
+        clock?.largeClock?.view
+                ?.removeOnAttachStateChangeListener(largeClockOnAttachStateChangeListener)
     }
 
     private fun updateTimeListeners() {

packages/SystemUI/tests/src/com/android/keyguard/ClockEventControllerTest.kt

@@ -18,7 +18,8 @@ package com.android.keyguard
 import android.content.BroadcastReceiver
 import android.testing.AndroidTestingRunner
 import android.view.View
-import android.widget.TextView
+import android.view.ViewTreeObserver
+import android.widget.FrameLayout
 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
 import com.android.systemui.bouncer.data.repository.FakeKeyguardBouncerRepository
@@ -83,7 +84,13 @@ class ClockEventControllerTest : SysuiTestCase() {
     @Mock private lateinit var bgExecutor: Executor
     @Mock private lateinit var featureFlags: FeatureFlags
     @Mock private lateinit var smallClockController: ClockFaceController
+    @Mock private lateinit var smallClockView: View
+    @Mock private lateinit var smallClockViewTreeObserver: ViewTreeObserver
+    @Mock private lateinit var smallClockFrame: FrameLayout
+    @Mock private lateinit var smallClockFrameViewTreeObserver: ViewTreeObserver
     @Mock private lateinit var largeClockController: ClockFaceController
+    @Mock private lateinit var largeClockView: View
+    @Mock private lateinit var largeClockViewTreeObserver: ViewTreeObserver
     @Mock private lateinit var smallClockEvents: ClockFaceEvents
     @Mock private lateinit var largeClockEvents: ClockFaceEvents
     @Mock private lateinit var parentView: View
@@ -99,8 +106,12 @@ class ClockEventControllerTest : SysuiTestCase() {
     fun setUp() {
         whenever(clock.smallClock).thenReturn(smallClockController)
         whenever(clock.largeClock).thenReturn(largeClockController)
-        whenever(smallClockController.view).thenReturn(TextView(context))
+        whenever(smallClockController.view).thenReturn(smallClockView)
-        whenever(largeClockController.view).thenReturn(TextView(context))
+        whenever(smallClockView.parent).thenReturn(smallClockFrame)
+        whenever(smallClockView.viewTreeObserver).thenReturn(smallClockViewTreeObserver)
+        whenever(smallClockFrame.viewTreeObserver).thenReturn(smallClockFrameViewTreeObserver)
+        whenever(largeClockController.view).thenReturn(largeClockView)
+        whenever(largeClockView.viewTreeObserver).thenReturn(largeClockViewTreeObserver)
         whenever(smallClockController.events).thenReturn(smallClockEvents)
         whenever(largeClockController.events).thenReturn(largeClockEvents)
         whenever(clock.events).thenReturn(events)
@@ -302,6 +313,36 @@ class ClockEventControllerTest : SysuiTestCase() {
         verify(configurationController).removeCallback(any())
         verify(batteryController).removeCallback(any())
         verify(keyguardUpdateMonitor).removeCallback(any())
+        verify(smallClockController.view)
+                .removeOnAttachStateChangeListener(underTest.smallClockOnAttachStateChangeListener)
+        verify(largeClockController.view)
+                .removeOnAttachStateChangeListener(underTest.largeClockOnAttachStateChangeListener)
+    }
+
+    @Test
+    fun registerOnAttachStateChangeListener_validate() = runBlocking(IMMEDIATE) {
+        verify(smallClockController.view)
+            .addOnAttachStateChangeListener(underTest.smallClockOnAttachStateChangeListener)
+        verify(largeClockController.view)
+            .addOnAttachStateChangeListener(underTest.largeClockOnAttachStateChangeListener)
+    }
+
+    @Test
+    fun registerAndRemoveOnGlobalLayoutListener_correctly() = runBlocking(IMMEDIATE) {
+        underTest.smallClockOnAttachStateChangeListener!!.onViewAttachedToWindow(smallClockView)
+        verify(smallClockFrame.viewTreeObserver).addOnGlobalLayoutListener(any())
+        underTest.smallClockOnAttachStateChangeListener!!.onViewDetachedFromWindow(smallClockView)
+        verify(smallClockFrame.viewTreeObserver).removeOnGlobalLayoutListener(any())
+    }
+
+    @Test
+    fun registerOnGlobalLayoutListener_RemoveOnAttachStateChangeListener_correctly() =
+        runBlocking(IMMEDIATE) {
+            underTest.smallClockOnAttachStateChangeListener!!
+                .onViewAttachedToWindow(smallClockView)
+            verify(smallClockFrame.viewTreeObserver).addOnGlobalLayoutListener(any())
+            underTest.unregisterListeners()
+            verify(smallClockFrame.viewTreeObserver).removeOnGlobalLayoutListener(any())
         }
 
     companion object {