Flutter - Assertion failed: assetName != null is not true [closed] - flutter

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After these codes create a screenshot, an image is created at the bottom. This is the code I implemented because I wanted to drag the created image after that.
However, an error occurs during execution and the code cannot be executed. Please help me to get my code to run fine.

Add the _bytes null-check on Positioned too:
if (bytes != null)
Positioned(...)

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Checkpatch.pl file is not checking all the standard coding rules [closed]

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I am trying to run the checkpatch.pl on a c file and the script is not checking the indentations, if conditions or functions.For every line I am getting the error: please, no space at the start of the line where I have only used tab. Can someone tell me whats the issue?
It is showing me false positive errors and not throwing errors when required. What am I missing from the checkpatch.pl file to show all the standard coding errors?

Catching rendering errors in flutter [closed]

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Since my app allows to compose widget trees by user edit operations, I'd like to catch render errors: If the user inserts a non-fitting widget which renders an error, the app should undo the last insert operation.
I specifically need to catch Exceptions caught by the widgets library:
I did find the Handling Errors in Flutter section. Unfortunately, this section doesn't explain how to catch render errors.
Could you provide a code sample for this?

Eerror being displayed on running Flutter in terminal [closed]

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I installed all the necessary files but then when I type flutter run in my terminal it is displaying error.
I'm supposed to get my code working on a mobile screen.

Why this error comes whenever I start and use unity? [closed]

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whenever I start using unity after a while it shows this error and unity crashes.
It unexpectedly starts all the processes in the taskbar thereafter causing unity as well as the system to crash.
please help me to fix this error.
https://i.stack.imgur.com/ZTpED.png

Anyone who knows a way around the error on Android Lifecycle plugin error on flutter [closed]

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\flutter_windows_v1.12.13+hotfix.8-stable\flutter.pub-cache\hosted\pub.dartlang.org\flutter_plugin_android_lifecycle-1.0.6\android\src\main\kotlin\io\flutter\plugins\flutter_plugin_android_lifecycle\FlutterAndroidLifecyclePlugin.kt. This is likely to due to an incorrect androidPackage: io.flutter.plugins.flutter_plugin_android_lifecycle or mainClass entry in the plugin's pubspec.
I keep on getting this error when installing the google map flutter plugin and the image picker