Fix lint issues in AsymmetricFingerprintDialog sample.

Change-Id: I6d1dad580449325f77ff167891911e6ae33ee579

2 files changed, 8 insertions, 4 deletions

diff --git a/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintAuthenticationDialogFragment.java b/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintAuthenticationDialogFragment.java
index a56556f1..fbe8ec9c 100644
--- a/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintAuthenticationDialogFragment.java
+++ b/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintAuthenticationDialogFragment.java
@@ -19,8 +19,8 @@ package com.example.android.asymmetricfingerprintdialog;
 import com.example.android.asymmetricfingerprintdialog.server.StoreBackend;
 import com.example.android.asymmetricfingerprintdialog.server.Transaction;
 
-import android.app.Activity;
 import android.app.DialogFragment;
+import android.content.Context;
 import android.content.SharedPreferences;
 import android.hardware.fingerprint.FingerprintManager;
 import android.os.Bundle;
@@ -158,9 +158,9 @@ public class FingerprintAuthenticationDialogFragment extends DialogFragment
     }
 
     @Override
-    public void onAttach(Activity activity) {
-        super.onAttach(activity);
-        mActivity = (MainActivity) activity;
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        mActivity = (MainActivity) getActivity();
     }
 
     /**
diff --git a/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintUiHelper.java b/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintUiHelper.java
index f6548116..dee42709 100644
--- a/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintUiHelper.java
+++ b/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/FingerprintUiHelper.java
@@ -27,7 +27,11 @@ import javax.inject.Inject;
 
 /**
  * Small helper class to manage text/icon around fingerprint authentication UI.
+ * This class assumes that the {@link android.Manifest.permission#USE_FINGERPRINT}
+ * permission has already been granted. (As of API 23 this permission is normal instead of dangerous
+ * and is granted at install time.)
  */
+@SuppressWarnings("MissingPermission")
 public class FingerprintUiHelper extends FingerprintManager.AuthenticationCallback {
 
     @VisibleForTesting static final long ERROR_TIMEOUT_MILLIS = 1600;