Add a way to create traces

Author: tejasd

firebase-perf/src/main/java/com/google/firebase/perf/session/PerfSession.java

@@ -40,7 +40,9 @@ public class PerfSession implements Parcelable {
   public static PerfSession createWithId(@NonNull String sessionId) {
     String prunedSessionId = sessionId.replace("-", "");
     PerfSession session = new PerfSession(prunedSessionId, new Clock());
-    session.setGaugeAndEventCollectionEnabled(shouldCollectGaugesAndEvents());
+//    session.setGaugeAndEventCollectionEnabled(shouldCollectGaugesAndEvents());
+    // For testing.
+    session.setGaugeAndEventCollectionEnabled(true);
 
     return session;
   }

firebase-sessions/test-app/src/main/kotlin/com/google/firebase/testing/sessions/FirstFragment.kt

@@ -27,13 +27,18 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import com.google.firebase.crashlytics.FirebaseCrashlytics
+import com.google.firebase.perf.FirebasePerformance
+import com.google.firebase.perf.metrics.Trace as PerfTrace
 import com.google.firebase.testing.sessions.databinding.FragmentFirstBinding
 import java.util.Date
 import java.util.Locale
 
 /** A simple [Fragment] subclass as the default destination in the navigation. */
 class FirstFragment : Fragment() {
   val crashlytics = FirebaseCrashlytics.getInstance()
+  val performance = FirebasePerformance.getInstance()
+  var performanceTrace: PerfTrace?  = null
+  var performanceTraceIdenticalName: PerfTrace? = null
 
   private var _binding: FragmentFirstBinding? = null
 
@@ -64,6 +69,18 @@ class FirstFragment : Fragment() {
         Thread.sleep(1_000)
       }
     }
+    binding.createTrace.setOnClickListener {
+      performanceTrace = performance.newTrace("test_trace")
+      performanceTraceIdenticalName = performance.newTrace("test_trace")
+    }
+    binding.startTrace.setOnClickListener {
+      performanceTrace?.start()
+      performanceTraceIdenticalName?.start()
+    }
+    binding.stopTrace.setOnClickListener {
+      performanceTrace?.stop()
+      performanceTraceIdenticalName?.stop()
+    }
     binding.buttonForegroundProcess.setOnClickListener {
       if (binding.buttonForegroundProcess.getText().startsWith("Start")) {
         ForegroundService.startService(requireContext(), "Starting service at ${getDateText()}")

firebase-sessions/test-app/src/main/res/layout/fragment_first.xml

@@ -47,6 +47,30 @@
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintTop_toBottomOf="@id/button_non_fatal" />
 
+    <Button
+        android:id="@+id/create_trace"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/create_trace"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/button_anr" />
+
+    <Button
+        android:id="@+id/start_trace"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/start_trace"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/button_anr" />
+
+    <Button
+        android:id="@+id/stop_trace"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/stop_trace"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/start_trace" />
+
     <Button
         android:id="@+id/button_foreground_process"
         android:layout_width="wrap_content"

firebase-sessions/test-app/src/main/res/values/strings.xml

@@ -23,6 +23,9 @@
   <string name="crash_button_text">Crash!</string>
   <string name="non_fatal_button_text">Non Fatal</string>
   <string name="button_anr_text">ANR</string>
+  <string name="create_trace">Create New Trace: test_trace</string>
+  <string name="start_trace">Start Trace: test_trace</string>
+  <string name="stop_trace">Stop Trace: test_trace</string>
   <string name="start_foreground_service_text">Start Foreground Service</string>
   <string name="start_splitcreen_text">Start splitscreen - Different activity</string>
   <string name="start_splitcreen_same_text">Start splitscreen - Same activity</string>