cometchat-android-v5-troubleshooting

Companion skills: cometchat-android-v5-core covers correct init/login patterns; cometchat-android-v5-production covers ProGuard rules.

Purpose

This skill teaches how to diagnose CometChat Android integration problems systematically. It covers Gradle build errors, runtime crashes, rendering issues, and version compatibility.

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Use this skill when

• "CometChat isn't working"
• "I'm getting a build error"
• "The chat screen is blank"
• "Messages aren't loading"
• Gradle sync failures
• Runtime crashes with CometChat in the stack trace

Do not use this skill when

• Setting up a new integration → use cometchat-android-v5-core
• Customizing appearance → use cometchat-android-v5-theming

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1. Common issues

Symptom	Likely cause	Fix
Could not resolve com.cometchat:chat-uikit-android	Missing Maven repo	Add maven { url "https://dl.cloudsmith.io/public/cometchat/cometchat/maven/" } to repositories
Duplicate class com.cometchat.*	Multiple CometChat versions	Check dependency tree: ./gradlew app:dependencies
Blank conversation list	Not logged in, or no conversations exist	Verify getLoggedInUser() != null. Send a test message from dashboard.
CometChatException: ERR - Authentication null	init() not called or failed	Call init() before login(). Check isSDKInitialized().
CometChatException: appIdErr	App ID not set in UIKitSettings	Verify setAppId() in UIKitSettingsBuilder
Components show but no data	Login succeeded but wrong region	Verify region matches dashboard: "us", "eu", "in"
ClassNotFoundException in release build	ProGuard stripping CometChat classes	Add -keep class com.cometchat.** { *; } to proguard-rules.pro
UnsupportedOperationException: Failed to resolve attribute when inflating CometChat views	App theme inherits Theme.AppCompat.* or Theme.Material3.* — the kit's attrs are resolved against Material 2 (CometChatTheme.DayNight itself parents on Theme.MaterialComponents.DayNight.NoActionBar)	Change app theme parent to CometChatTheme.DayNight
NetworkOnMainThreadException	Calling CometChat sync methods on main thread	Use callbacks (all CometChat methods are async)
minSdkVersion 21 error	CometChat requires API 24+	Set minSdkVersion 24 in build.gradle
Message list shows wrong messages	setUser()/setGroup() called with wrong object	Verify UID/GUID matches the intended conversation
Calling buttons not showing	Calling SDK not added	Add com.cometchat:calls-sdk-android:4.+ dependency
java.lang.NoSuchMethodError	Version mismatch between UI Kit and Chat SDK	Use compatible versions — UI Kit 5.x requires Chat SDK 4.x

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2. Diagnostic steps

1. Check init: CometChatUIKit.isSDKInitialized() — must be true
2. Check login: CometChatUIKit.getLoggedInUser() — must not be null
3. Check Gradle: ./gradlew app:dependencies | grep cometchat — verify versions
4. Check manifest: Verify INTERNET permission
5. Check region: Must match dashboard exactly
6. Check logs: Filter logcat for CometChat tag

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Hard rules

• Always check init + login first. 90% of "it's not working" issues are init/login failures.
• Never guess at the cause. Check logcat, check the dependency tree, check the dashboard.
• ProGuard is the #1 release-build issue. Always add keep rules before the first release build.