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FingerprintServiceを読んで気になったこと
http://tools.oesf.biz/android-MNC/xref/com/android/server/fingerprint/FingerprintService.java
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532 @Override
533 // Binder call
534 public void authenticate(final IBinder token, final long opId, final int groupId,
535 final IFingerprintServiceReceiver receiver, final int flags, String opPackageName) {
536 checkPermission(USE_FINGERPRINT);
537 if (!canUserFingerPrint(opPackageName)) {
538 return;
539 }
540 mHandler.post(new Runnable() {
541 @Override
542 public void run() {
543 startAuthentication(token, opId, groupId, receiver, flags);
544 }
545 });
546 }
=====
authenticate()の536行目で
checkPermission(USE_FINGERPRINT);
した後で
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367 private boolean canUserFingerPrint(String opPackageName) {
368 checkPermission(USE_FINGERPRINT);
369
370 return mAppOps.noteOp(AppOpsManager.OP_USE_FINGERPRINT, Binder.getCallingUid(),
371 opPackageName) == AppOpsManager.MODE_ALLOWED;
372 }
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もう一度canUserFingerPrint(String)の中で何故か
checkPermission(USE_FINGERPRINT);
している。
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