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README.md

react-native-fingerprint-identify

Fingerprint android auth for react-native (Android only).

This is an expandable Android fingerprint API compatible lib, which also combines Samsung and MeiZu's official Fingerprint API.

Samsung and MeiZu's fingerprint SDK supports most devices which system versions less than Android 6.0.

Api priority level:Android > Samsung > MeiZu, Xiaomi,...

Demo

Getting started

$ npm install react-native-fingerprint-identify --save

Most automatic installation

$ react-native link react-native-fingerprint-identify

Make sure the following lines in android/app/build.gradle:
android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
...
    defaultConfig {
      targetSdkVersion 25

Manual Installation

Open up android/app/src/main/java/[...]/MainApplication.java
  • Add import com.fingerprint.identify.RNFingerprintIdentifyPackage;

    to the imports at the top of the file

  • Add new RNFingerprintIdentifyPackage()

    to the list returned by the getPackages() method

Append the following lines to android/settings.gradle:
  	include ':react-native-fingerprint-identify'
  	project(':react-native-fingerprint-identify').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-fingerprint-identify/android')
Make sure the following lines in android/app/build.gradle:
android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
...
    defaultConfig {
      targetSdkVersion 25

Insert the following lines inside the dependencies block in android/app/build.gradle

in dependencies block

  compile project(':react-native-fingerprint-identify')

Example

Please clone repo and look on the example project to get more details

import FingerprintIdentify from 'react-native-fingerprint-identify';
import { Platform } from 'react-native'

// Make sure you run in Android Platform condition
scanFingerprint = async () => {
  if (Platform.OS === 'android') {
    try {
      const initFingerPrintIdentify = await FingerprintIdentify.initFingerPrintIdentify()
      const isSensorAvailable = await FingerprintIdentify.isSensorAvailable()
      if (initFingerPrintIdentify && isSensorAvailable) {
        await FingerprintIdentify.startIdentify((status) => {
          console.log(status)
        })
      }
    } catch (error) {
      console.log(error)
      return
    }
  }
}

Usage

Easy custom error message with error codes.

Errors on startIdentify() function:

ERROR_NOT_AVAILABLE
ERROR_NOT_MATCH
ERROR_NOT_MATCH_AND_CHANCES_LEFT:(AvailableTimes)

Errors on isSensorAvailable() function:

ERROR_HARDWARE: The device does not support fingerprint scanning.
ERROR_ENROLLED: No fingerprints registered.
ERROR_PERMISSION: App has no permission.
ERROR_INITIALIZED: The FingerPrintIdentify can not initialize

Init FingerprintIdentify before request scan.

FingerprintIdentify.initFingerPrintIdentify()

Promise returns true if success and string error in other cases (including case when you have sensor, but not enabled it in your phone's settings)

FingerprintIdentify.isSensorAvailable()

Starting scan finger print and get the result in the callback function, returns true if success and string error in other cases.

FingerprintIdentify.startIdentify((val) => console.log(val))

Removing event listener (fingerprint identity status) - prevent crash App after authentication, usually put in componentWillUnmount()

FingerprintIdentify.dismiss()

Removing event listener to scan fingerprint and also cancel identify

FingerprintIdentify.cancelIdentify()

Troubleshooting

If you make five wrong fingerprint attempts, Android Fingerprint API requires some time to continue work on the sensor.

In that case FingerprintIdentify.startIdentify() locked out, so it would be good to make the user aware that sensor is temporarily unavailable (near 30 seconds).

Questions or suggestions?

Feel free to open an issue

Donation

If this project help you reduce time to develop, you can give me a cup of coffee :)

paypal