使用androidx BiometricPrompt实现指纹验证功能

 implementation 'androidx.biometric:biometric:1.0.1'

1.BiometricPrompt(@NonNull FragmentActivity fragmentActivity,
        @NonNull Executor executor, @NonNull AuthenticationCallback callback)
  2. BiometricPrompt(@NonNull Fragment fragment,
        @NonNull Executor executor, @NonNull AuthenticationCallback callback)

 new BiometricPrompt.PromptInfo.Builder().setTitle("title")
   .setSubtitle("subTitle")
   .setDescription("description")
   .setDeviceCredentialAllowed(false)
   .setNegativeButtonText("button").build()

private BiometricPrompt biometricPrompt;
       private void startFinger(){
       			 biometricPrompt = new BiometricPrompt(this, new Executor() {
              			  @Override
              			  public void execute(Runnable command) {
                 			   command.run();
            			    }
         			   }, new FingerCallBack());
     			  biometricPrompt.authenticate( new BiometricPrompt.PromptInfo.Builder().setTitle("title")
      			 .setSubtitle("subTitle")
       			 .setDescription("description")
       			 .setDeviceCredentialAllowed(false)
      			 .setNegativeButtonText("button").build());
       }
          private void cancelFinger() {
      			  if (biometricPrompt != null) {
          			  biometricPrompt.cancelAuthentication();
     			   }
    }

private class FingerCallBack extends BiometricPrompt.AuthenticationCallback {
        @Override
        public void onAuthenticationError(int errMsgId, CharSequence errString) {
            super.onAuthenticationError(errMsgId, errString);
            Log.e("fingers", "onAuthenticationError");
        }
        @Override
        public void onAuthenticationSucceeded(@NonNull @NotNull BiometricPrompt.AuthenticationResult result) {
            super.onAuthenticationSucceeded(result);
            cancelFinger();
            Log.e("fingers", "识别成功 onAuthenticationSucceeded");
        }
        @Override
        public void onAuthenticationFailed() {
            super.onAuthenticationFailed();
            Log.e("fingers", "onAuthenticationFailed  ");
        }
    }