[英]Crash using biometric androidx library
In my app I'm using androidx biometric support library 1.0.1.在我的应用程序中,我使用的是 androidx 生物识别支持库 1.0.1。 On Android 9 I can see this kind of bug but I have no idea where they come from::
在 Android 9 我可以看到这种错误,但我不知道它们来自哪里::
02-01 13:00:06.422 23937 23937 E AndroidRuntime: FATAL EXCEPTION: main
02-01 13:00:06.422 23937 23937 E AndroidRuntime: Process: xxxxxxx, PID: 23871
02-01 13:00:06.422 23937 23937 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.hardware.fingerprint.FingerprintManager.getErrorString(int, int)' on a null object reference
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at android.hardware.biometrics.BiometricPrompt.lambda$sendError$0(BiometricPrompt.java:490)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at android.hardware.biometrics.-$$Lambda$BiometricPrompt$HqBGXtBUWNc-v8NoHYsj2gLfaRw.run(Unknown Source:6)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:873)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at android.os.Looper.loop(Looper.java:193)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6672)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:495)
02-01 13:00:06.422 23937 23937 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:860)
Code:代码:
KeyguardManager km = (KeyguardManager) getContext().getSystemService(KEYGUARD_SERVICE);
BiometricPrompt.Builder builder = new BiometricPrompt.Builder(getContext().getApplicationContext());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
builder.setConfirmationRequired(true);
if (km != null && km.isDeviceSecure()) {
builder.setDeviceCredentialAllowed(true);
} else {
builder.setNegativeButton(getContext().getResources().getString(android.R.string.cancel), getContext().getApplicationContext().getMainExecutor(), (dialog, which) -> {
//something
});
}
} else {
builder.setNegativeButton(getContext().getResources().getString(android.R.string.cancel), getContext().getApplicationContext().getMainExecutor(), (dialog, which) -> {
//something
});
}
builder.setDescription(getContext().getResources().getString(R.string.confirm_pin));
builder.setTitle(getContext().getResources().getString(R.string.modify_pin));
BiometricPrompt prompt = builder.build();
prompt.authenticate(new CancellationSignal(), getContext().getMainExecutor(), new BiometricPrompt.AuthenticationCallback() {
@Override
public void onAuthenticationError(int errorCode, CharSequence errString) {
}
@Override
public void onAuthenticationFailed() {
}
});
Apparently Google fixed the Bug in Version 1.1.0-beta01 of the Biometric library.显然,Google 修复了 Biometric 库1.1.0-beta01 版本中的错误。
Fixed an issue where BiometricPrompt caused a crash on some Android 9 devices without a fingerprint sensor.
修复了 BiometricPrompt 在某些没有指纹传感器的 Android 9 设备上导致崩溃的问题。 (b/151443237)
(b/151443237)
Note : 1.1.0 hit stable on 27th January '21注意: 1.1.0在 21 年 1 月 27 日达到稳定
Biometric support library 1.0.1.生物识别支持库 1.0.1。 On Android 9 because Some device don't have Biometric Sensor.
在 Android 9 因为有些设备没有生物识别传感器。 You can follow below steps.
您可以按照以下步骤操作。
Check Biometric Support or not检查生物识别支持与否
private fun checkBiometricSupportOrNot():Boolean {私人乐趣 checkBiometricSupportOrNot():Boolean {
val keyguardManager: KeyguardManager = getSystemService(Context.KEYGUARD_SERVICE) as KeyguardManager if (.keyguardManager.isKeyguardSecure) { notifyUser("Fingerprint hs not been enabled in settings.") return false } if (ActivityCompat,checkSelfPermission( this. android.Manifest.permission.USE_BIOMETRIC ).= PackageManager.PERMISSION_GRANTED ) { notifyUser("Fingerprint hs not been enabled in settings.") return false } return if (packageManager.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT)) true else true
} }
2> Check conduction in click event 2> 在点击事件中检查导通
tvLogin.setOnClickListener {
if (checkBiometricSupportOrNot()){
val biometricPrompt : BiometricPrompt = BiometricPrompt.Builder(this)
.setTitle("Title")
.setSubtitle("Authenticaion is required")
.setDescription("Fingerprint Authentication")
.setNegativeButton("Cancel", this.mainExecutor) { _, _ ->
}.build()
biometricPrompt.authenticate(getCancellationSignal(), mainExecutor, authenticationCallback)
}else{
notifyUser("Fingerprint hs not been enabled in settings.")
}
}
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