dump view hierarchy with ui automator to find other apps

.github/workflows/android.yml

@@ -87,11 +87,7 @@ jobs:
  chmod 777 emulator.log # allow writing to log file
  adb logcat >> emulator.log & # pipe all logcat messages into log file as a background process
  adb shell settings put global package_verifier_user_consent -1
- adb shell "screenrecord --bugreport /data/local/tmp/testRecording.mp4 & echo \$! > /data/local/tmp/screenrecord_pid.txt" &
  ./gradlew connectedCheck --no-build-cache --no-daemon --stacktrace
- adb shell "kill -2 \$(cat /data/local/tmp/screenrecord_pid.txt)"
- sleep 1
- adb pull /data/local/tmp/testRecording.mp4 .
  - name: Upload results
  if: ${{ always() }}
  uses: actions/upload-artifact@v3

papa/src/androidTest/java/papa/test/utilities/PapaTestInstrumentationRunner.kt

@@ -5,8 +5,13 @@ import androidx.test.espresso.Espresso
 import androidx.test.espresso.base.DefaultFailureHandler
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.runner.AndroidJUnitRunner
+import androidx.test.uiautomator.UiDevice
+import org.xmlpull.v1.XmlPullParser
+import org.xmlpull.v1.XmlPullParserFactory
 import radiography.Radiography
 import radiography.ViewStateRenderers.DefaultsIncludingPii
+import java.io.ByteArrayOutputStream
+import java.io.StringReader
 
 class PapaTestInstrumentationRunner : AndroidJUnitRunner() {
 
@@ -18,6 +23,66 @@ class PapaTestInstrumentationRunner : AndroidJUnitRunner() {
  try {
  defaultFailureHandler.handle(error, viewMatcher)
  } catch (decoratedError: Throwable) {
+ val uiDevice = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+ val os = ByteArrayOutputStream()
+ uiDevice.dumpWindowHierarchy(os)
+ val uiAutomatorWindowHierarchy = os.toString()
+ val factory = XmlPullParserFactory.newInstance()
+ val xpp = factory.newPullParser()
+ xpp.setInput(StringReader(uiAutomatorWindowHierarchy))
+ val result = StringBuilder()
+
+ var eventType = xpp.eventType
+ while (eventType != XmlPullParser.END_DOCUMENT) {
+ if (eventType == XmlPullParser.START_TAG) {
+ when (xpp.name) {
+ "hierarchy" -> {
+ result.appendLine(
+ "view hierarchy with screen rotation ${xpp.getAttributeValue(null, "rotation")}"
+ )
+ }
+ "node" -> {
+ val interestingAttributes = listOf(
+ "text", "resource-id", "checked", "enabled", "focused", "selected", "bounds",
+ "visible-to-user", "package"
+ )
+ val className = xpp.getAttributeValue(null, "class").substringAfterLast(".")
+ val attributes = (0 until xpp.attributeCount)
+ .asSequence()
+ .mapNotNull { index ->
+ val name = xpp.getAttributeName(index)
+ val value = xpp.getAttributeValue(index)
+ if (value.isNullOrBlank() || name !in interestingAttributes) {
+ return@mapNotNull null
+ }
+ when (name) {
+ "checked" -> if (value == "true") "checked" else null
+ "focused" -> if (value == "true") "focused" else null
+ "selected" -> if (value == "true") "selected" else null
+ "enabled" -> if (value == "true") null else "disabled"
+ "visible-to-user" -> if (value == "true") null else "invisible"
+ "text" -> "text:\"$value\""
+ "package" -> {
+ // Root view nodes have depth 2 (depth starts at 1 with the "hierarchy" node)
+ if (xpp.depth == 2) {
+ "app-package:$value"
+ } else {
+ null
+ }
+ }
+ "resource-id" -> "id:${value.substringAfter(":id/")}"
+ else -> "$name:$value"
+ }
+ }.toList().joinToString(separator = ", ")
+ result.append("│")
+ .append(" ".repeat(xpp.depth - 2))
+ .appendLine("$className { $attributes }")
+ }
+ else -> error("Unexpected tag ${xpp.name}")
+ }
+ }
+ eventType = xpp.next()
+ }
  val detailMessageField = Throwable::class.java.getDeclaredField("detailMessage")
  val previouslyAccessible = detailMessageField.isAccessible
  try {
@@ -30,6 +95,11 @@ class PapaTestInstrumentationRunner : AndroidJUnitRunner() {
  val hierarchy = Radiography.scan(viewStateRenderers = DefaultsIncludingPii)
  // Notice the plural: there's one view hierarchy per window.
  message += "\nView hierarchies:\n$hierarchy"
+ message += "\nUI Automator window hierarchy better:\n$result"
+ message += "\nUI Automator window hierarchy:\n${
+ uiAutomatorWindowHierarchy.lines()
+ .joinToString("\n") { "-$it" }
+ }"
  detailMessageField[decoratedError] = message
  } finally {
  detailMessageField.isAccessible = previouslyAccessible