Device labels missing from run tabs on IntelliJ 2025.3 / Android Studio Panda

[lukemmtt]

Description

Device labels (e.g., "main.dart (macOS)", "main.dart (iPhone 16 Pro)") no longer appear in Run/Debug tab titles starting with IntelliJ 2025.3 (Android Studio Panda). All tabs show only the run configuration name (e.g., "main.dart"), making it impossible to distinguish which device a build is running on when targeting multiple platforms simultaneously.

Root Cause

The reflection code in LaunchState.java (lines 173-185) that sets the display name is silently failing on every launch.

The code gets the private myDisplayNameView field from RunContentDescriptor, then calls getMethod("setValue", Object.class) on the field's runtime class, then calls invoke(). This worked when the field type was MutableReactiveProperty (a public IntelliJ-internal class), but broke in IntelliJ 2025.3 when the field type was changed to MutableStateFlow from kotlinx-coroutines (JetBrains/intellij-community@aaa88849ba4c).

The runtime implementation class kotlinx.coroutines.flow.StateFlowImpl is package-private. Java's access control prevents Method.invoke() on a public method when the declaring class is not accessible from the caller, throwing IllegalAccessException. The exception is caught silently (logged at INFO without stack trace), so the device name is never applied.

Verification

The Android Studio idea.log shows "Error setting display name" (from the catch block in LaunchState.java:184) on every Flutter launch in Panda.

Reproduced independently by calling the same reflection against the actual kotlinx-coroutines-core-jvm.jar shipped with Android Studio Panda:

MutableStateFlow<String> flow = StateFlowKt.MutableStateFlow(null);
Method m = flow.getClass().getMethod("setValue", Object.class);
m.invoke(flow, "test");
// IllegalAccessException: cannot access a member of class
// kotlinx.coroutines.flow.StateFlowImpl with modifiers "public"

Proposed Fix

Use RunContentDescriptor.setDisplayName() (an existing protected method on RunContentDescriptor) via reflection instead of reaching into the private field's internal type:

Method setDisplayName = RunContentDescriptor.class.getDeclaredMethod("setDisplayName", String.class);
setDisplayName.setAccessible(true);
setDisplayName.invoke(descriptor, nameWithDeviceName);

This is more resilient because it calls a stable API method on a public class rather than depending on the internal type of a private field.

An alternative minimal fix would be to add setValueMethod.setAccessible(true) before the invoke() call in the existing code, but this remains fragile if the field type changes again.

Affected Versions

• Broken: Android Studio Panda 1 (2025.3.1), IntelliJ 2025.3+
• Working: Android Studio Narwhal (2025.1.x), IntelliJ 2025.1 and earlier

Related

• Android Public Tracker: https://issuetracker.google.com/issues/484520101
• IntelliJ commit that introduced the regression: aaa88849ba4c
• Existing feature requests: Add device identity to run console tabs #6258, Add to the debug tab process name the device it is running on #1906
• PR ♻️ Add back the device name with the running tab #7948 (2024) introduced the myDisplayNameView reflection

[blasko]

The issue still persists, on both the stable and dev channel.

[lukemmtt]

@blasko Can you share more details? The issue appears to remains resolved in my environment:

Android Studio Panda 3 | 2025.3.3 Patch 1
Flutter plugin v91.0.0

[blasko]

@lukemmtt thanks for the info, I've just tried in Android Studio and it's working on the dev plugin: 92.0.0-dev.20260415-cb14614 (haven't tried stable yet).

I primarily use IntelliJ where the dev plugin worked a couple of week ago, but now fails (not sure if it's related to any IntelliJ updates etc.) - dev plugin: 92.0.0-dev.20260415-cb14614 (both stable and dev versions are not showing the device label).