Flutter_blue: uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:flutter_blue]

[ArcticSpaceFox]

First things frst great plugin, but it doesnt work correctly by default :/ Pls help me I am a total newcommer and want to open locks we build in the company I do a practica at. I always get the following error:
`

• What went wrong:
  Execution failed for task ':app:processDebugManifest'.

Manifest merger failed : uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:flutter_blue] C:UsersPi-GastDesktoppiBike-Lock_Alexpibikeappbuildflutter_blueintermediatesmanifestsfulldebugAndroidManifest.xml as the library might be using APIs not available in 16
Suggestion: use a compatible library with a minSdk of at most 16,
or increase this project's minSdk version to at least 19,
or use tools:overrideLibrary="com.pauldemarco.flutterblue" to force usage (may lead to runtime failures)

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
• Get more help at https://help.gradle.org
  BUILD FAILED in 3s
  Gradle task assembleDebug failed with exit code 1
  Exited (sigterm)`

[GauravPatni]

Change minSdkVersion to 19 to your Android -src -builf.gradle file

Also check if scanning works properly on Android 4.4.4 devices as I am facing issue for this https://github.com/pauldemarco/flutter_blue/issues/186

[ArcticSpaceFox]

When I change it I get the following error:

Launching lib\main.dart on SM G920F in debug mode...
C:\Users\Pi-Gast\.gradle\caches\transforms-1\files-1.1\core-1.0.1.aar\e3de24e000f155198a23b39d789f7dc8\res\values\values.xml:133:5-70: AAPT: error: resource android:attr/fontVariationSettings not found.
C:\Users\Pi-Gast\.gradle\caches\transforms-1\files-1.1\core-1.0.1.aar\e3de24e000f155198a23b39d789f7dc8\res\values\values.xml:133:5-70: AAPT: error: resource android:attr/ttcIndex not found.
C:\Users\Pi-Gast\Desktop\piBike-Lock_Alex\pibikeapp\build\app\intermediates\incremental\mergeDebugResources\merged.dir\values\values.xml:20: error: resource android:attr/fontVariationSettings not found.
C:\Users\Pi-Gast\Desktop\piBike-Lock_Alex\pibikeapp\build\app\intermediates\incremental\mergeDebugResources\merged.dir\values\values.xml:20: error: resource android:attr/ttcIndex not found.
error: failed linking references.
Failed to execute aapt
com.android.ide.common.process.ProcessException: Failed to execute aapt
    at com.android.builder.core.AndroidBuilder.processResources(AndroidBuilder.java:796)
    at com.android.build.gradle.tasks.ProcessAndroidResources.invokeAaptForSplit(ProcessAndroidResources.java:551)
    at com.android.build.gradle.tasks.ProcessAndroidResources.doFullTaskAction(ProcessAndroidResources.java:285)
    at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.java:109)
    at sun.reflect.GeneratedMethodAccessor668.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$IncrementalTaskAction.doExecute(DefaultTaskClassInfoStore.java:173)
    at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:134)
    at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:121)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:122)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:105)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:99)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:580)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:99)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
    at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:503)
    at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:482)
    at com.google.common.util.concurrent.AbstractFuture$TrustedFuture.get(AbstractFuture.java:79)
    at com.android.builder.core.AndroidBuilder.processResources(AndroidBuilder.java:794)
    ... 47 more
Caused by: java.util.concurrent.ExecutionException: com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
    at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:503)
    at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:462)
    at com.google.common.util.concurrent.AbstractFuture$TrustedFuture.get(AbstractFuture.java:79)
    at com.android.builder.internal.aapt.v2.QueueableAapt2.lambda$makeValidatedPackage$1(QueueableAapt2.java:179)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    ... 1 more
Caused by: com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
    at com.android.builder.png.AaptProcess$NotifierProcessOutput.handleOutput(AaptProcess.java:463)
    at com.android.builder.png.AaptProcess$NotifierProcessOutput.err(AaptProcess.java:415)
    at com.android.builder.png.AaptProcess$ProcessOutputFacade.err(AaptProcess.java:332)
    at com.android.utils.GrabProcessOutput$1.run(GrabProcessOutput.java:104)
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:processDebugResources'.
> Failed to execute aapt
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
* Get more help at https://help.gradle.org
BUILD FAILED in 9s
Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

I tried it again after removing flutter_blue and it worked so I added flutter_blue again and it crashed again at aapt :/ I am so confused. What do I do wrong?

[ArcticSpaceFox]

Ok you dont only have to change the minSdkVersion to 19 no you also have to change the compiled and targetSdkversion to 28 then it works as usual 👍

[kartikbathla]

can it be done the same way on flutter as android? I tried editing the xml as one would do in android studio and it didnt resolve the issue. Can you please share your xml code

[ArcticSpaceFox]

@kartikbathla Ohh man I am sooo sorry for not answering you 😞 I hope your issue is resolved now! Especially after the new pull with the Permission fixes! If not feel free to contact me

[KhazanGu]

minSdkVersion

It works for me. open /android/app/build.gradle than update minSdkVersion to 19.