Build failed

[thangkho]

When I download your app and build in android studio it fail Error:Note: Some input files use or override a deprecated API. Note: Recompile with -Xlint:deprecation for details. FAILURE: Build failed with an exception.

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

  com.android.build.api.transform.TransformException: java.lang.RuntimeException: java.lang.RuntimeException: java.io.IOException: Failed to find byte code for android/hardware/biometrics/BiometricPrompt$AuthenticationCallback

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 58s How I can fix it?

[gaoyangcr7]

What is your compile sdk version? It must be 28

[thangkho]

apply plugin: 'com.android.application'

android { compileSdkVersion 28 defaultConfig { applicationId "gaoyang.biometricdemo" minSdkVersion 23 targetSdkVersion 28 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } }

dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'com.android.support:appcompat-v7:28.0.0-alpha3' implementation 'com.android.support.constraint:constraint-layout:1.1.2' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.2' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' implementation project(':biometriclib') } I download your app and not edit.

[gaoyangcr7]

Try this：https://stackoverflow.com/questions/49915775/failed-to-find-byte-code-for-android-hardware-fingerprint-fingerprintmanageraut

just disable Instant Run

[thangkho]

Thank you! a marginal question: In blog https://android-developers.googleblog.com/2018/06/better-biometrics-in-android-p.html. Bimometrics have support for android O or lower if import library. Where I can get BimometricPrompt compat library and they said Biometricprompt can suppor for face and iris but when I read in document https://developer.android.com/reference/android/hardware/biometrics/BiometricPrompt. I can't see support for iris or face. Biometricprompt is really support for iris and face?

[gaoyangcr7]

【FingerprintManager】have support for Api23 ~ Api27。 【FingerprintManagerCompat】in the support v4 lib，it is a wrapper for FingerprintManager。 Above Api28，FingerprintManager was deprecated，replaced by【BiometricPrompt】，but Biometricprompt still hasn't seen support iris or face interface

[thangkho]

It mean if api <28 I can't use BiometricPrompt?

[gaoyangcr7]

Yes！

[thangkho]

thank you so much! good luck