Merge pull request #82 from ycai2/feature/more-granular-android-status-checks

feature: add more fingerprint status checking methods

Author: mCodex

README.md

@@ -118,6 +118,12 @@ As noted by by [@Palisand](https://github.com/Palisand) in [this issue](https://
 
 We unified our library's methods to bring more efficiency and simplify the usability for other developers. We hope that you enjoy it. :)
 
+`isHardwareDetected()`: resolves to a boolean that indicates the detection of fingerprint hardware
+
+`hasEnrolledFingerprints()`: resolves to a boolean that indicates the enrollment status of fingerprints on the device
+
+`isSensorAvailable`: resolves to a boolean that indicates the overall availability of fingerprint sensor (a combination of the previous two methods)
+
 `setItem(key, value, options)`: You can insert data into shared preferences & keychain using this promise method.
 
 `getItem(key, options)`: This promise will get value from given key.

android/src/main/java/br/com/classapp/RNSensitiveInfo/RNSensitiveInfoModule.java

@@ -87,6 +87,24 @@ private boolean hasSetupFingerprint() {
         }
     }
 
+    @ReactMethod
+    public void isHardwareDetected(final Promise pm) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            pm.resolve(mFingerprintManager.isHardwareDetected());
+        } else {
+            pm.resolve(false);
+        }
+    }
+
+    @ReactMethod
+    public void hasEnrolledFingerprints(final Promise pm) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            pm.resolve(mFingerprintManager.hasEnrolledFingerprints());
+        } else {
+            pm.resolve(false);
+        }
+    }
+
     @ReactMethod
     public void isSensorAvailable(final Promise promise) {
         promise.resolve(hasSetupFingerprint());