App Installed but not started (android)

[imadarif]

React Native Environment Info:
System:
OS: macOS High Sierra 10.13.6
CPU: (4) x64 Intel(R) Core(TM) i5-4570R CPU @ 2.70GHz
Memory: 210.50 MB / 16.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 8.9.4 - /usr/local/bin/node
Yarn: yarn install v0.27.5
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
Done in 382.22s. - /usr/local/bin/yarn
npm: 6.5.0 - /usr/local/bin/npm
SDKs:
iOS SDK:
Platforms: iOS 12.1, macOS 10.14, tvOS 12.1, watchOS 5.1
Android SDK:
API Levels: 27
Build Tools: 27.0.3
IDEs:
Xcode: 10.1/10B61 - /usr/bin/xcodebuild
npmPackages:
react: 16.6.1 => 16.6.1
react-native: 0.57.5 => 0.57.5
npmGlobalPackages:
react-native-cli: 2.0.1

app is installed in android emulator but not started.

$ adb -s emulator-5554 shell am start -n com.application.xxx/com.application.xxx.MainActivity
Starting: Intent { cmp=com.application.xxx/.MainActivity }

Exception occurred while executing:
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String)' on a null object reference
at android.app.LoadedApk.createAppFactory(LoadedApk.java:224)
at android.app.LoadedApk.(LoadedApk.java:152)
at android.app.ActivityThread.getPackageInfo(ActivityThread.java:2043)
at android.app.ActivityThread.getPackageInfo(ActivityThread.java:1998)
at android.app.ActivityThread.getPackageInfo(ActivityThread.java:1970)
at android.app.ContextImpl.createPackageContextAsUser(ContextImpl.java:2054)
at com.android.server.AttributeCache.get(AttributeCache.java:135)
at com.android.server.am.ActivityRecord.(ActivityRecord.java:903)
at com.android.server.am.ActivityStarter.startActivity(ActivityStarter.java:804)
at com.android.server.am.ActivityStarter.startActivity(ActivityStarter.java:528)
at com.android.server.am.ActivityStarter.startActivityMayWait(ActivityStarter.java:1057)
at com.android.server.am.ActivityStarter.execute(ActivityStarter.java:473)
at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:4841)
at com.android.server.am.ActivityManagerShellCommand.runStartActivity(ActivityManagerShellCommand.java:458)
at com.android.server.am.ActivityManagerShellCommand.onCommand(ActivityManagerShellCommand.java:139)
at android.os.ShellCommand.exec(ShellCommand.java:103)
at com.android.server.am.ActivityManagerService.onShellCommand(ActivityManagerService.java:15478)
at android.os.Binder.shellCommand(Binder.java:631)
at android.os.Binder.onTransact(Binder.java:529)
at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:4397)
at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3114)
at android.os.Binder.execTransact(Binder.java:726)

[iba-1]

Same thing here:
BUILD SUCCESSFUL in 8s
47 actionable tasks: 12 executed, 35 up-to-date
info Running adb -s emulator-5554 reverse tcp:8081 tcp:8081
info Starting the app on emulator-5554 (adb -s emulator-5554 shell am start -n com.trumpingtruck/com.trumpingtruck.MainActivity)...
Starting: Intent { cmp=com.trumpingtruck/.MainActivity }

Exception occurred while executing:
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String)' on a null object reference
at android.app.LoadedApk.createAppFactory(LoadedApk.java:224)
at android.app.LoadedApk.(LoadedApk.java:152)
at android.app.ActivityThread.getPackageInfo(ActivityThread.java:2043)
at android.app.ActivityThread.getPackageInfo(ActivityThread.java:1998)
at android.app.ActivityThread.getPackageInfo(ActivityThread.java:1970)
at android.app.ContextImpl.createPackageContextAsUser(ContextImpl.java:2054)
at com.android.server.AttributeCache.get(AttributeCache.java:135)
at com.android.server.am.ActivityRecord.(ActivityRecord.java:903)
at com.android.server.am.ActivityStarter.startActivity(ActivityStarter.java:804)
at com.android.server.am.ActivityStarter.startActivity(ActivityStarter.java:528)
at com.android.server.am.ActivityStarter.startActivityMayWait(ActivityStarter.java:1057)
at com.android.server.am.ActivityStarter.execute(ActivityStarter.java:473)
at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:4841)
at com.android.server.am.ActivityManagerShellCommand.runStartActivity(ActivityManagerShellCommand.java:458)
at com.android.server.am.ActivityManagerShellCommand.onCommand(ActivityManagerShellCommand.java:139)
at android.os.ShellCommand.exec(ShellCommand.java:103)
at com.android.server.am.ActivityManagerService.onShellCommand(ActivityManagerService.java:15478)
at android.os.Binder.shellCommand(Binder.java:631)
at android.os.Binder.onTransact(Binder.java:529)
at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:4397)
at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3114)
at android.os.Binder.execTransact(Binder.java:726)

[olanMbakop]

I got same issue. Successfully build and installed, but not able to run on emulator.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[stale]

Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please feel free to create a new issue with up-to-date information.