The Problem

I get an error with $ flutter run --no-sound-null-safety, but I don't know what the error is. I checked an app with my Android device, the build looks good.

What I Did

• Installed permission_handler.

  dependencies: permission_handler: ^8.2.6

• Set compileSdkVersion of android/app/build.gradle 31 from 30.

• Added <uses-permission android:name="com.android.vending.BILLING" /> inside <manifest ....> of android/app/src/main/AndroidManifest.xml

Log

$ flutter run --no-sound-null-safety
Launching lib\main.dart on Pixel 5a in debug mode...
Checking the license for package Android SDK Platform 31 in D:\Android\licenses
License for package Android SDK Platform 31 accepted.
Preparing "Install Android SDK Platform 31 (revision: 1)".
"Install Android SDK Platform 31 (revision: 1)" ready.
Installing Android SDK Platform 31 in D:\Android\platforms\android-31
"Install Android SDK Platform 31 (revision: 1)" complete.
"Install Android SDK Platform 31 (revision: 1)" finished.
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Running Gradle task 'assembleDebug'...                            112.1s
√  Built build\app\outputs\flutter-apk\app-debug.apk.
Installing build\app\outputs\flutter-apk\app.apk...              1,910ms
Error: ADB exited with exit code 1
Performing Streamed Install

adb: failed to install D:\FlutterProjects\test\build\app\outputs\flutter-apk\app.apk: Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package com.tester.test   
signatures do not match previously installed version; ignoring!]

CodePudding user response：

The following in the logcat points out the problem:

adb: failed to install D:\FlutterProjects\test\build\app\outputs\flutter-apk\app.apk: Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package com.tester.test   
signatures do not match previously installed version; ignoring!]

The app that you are trying to install has a different signature than the one that is already installed on the device. That's why the new version cannot be installed as an update to the existing app. I have faced this too.

Just uninstall the app from the device, and again execute as usual. The problem should be solved.