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Fingerprint API
for Android
@takuji31
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About me
• Takuji Nishibayashi
• @takuji31
• Fenrir Inc.
• NNID: takuji31
• Udemae: S / Rank: 41
• Loves Android / Kotlin
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New features in
Marshmallow
(Android 6)
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Now on Tap
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New Permission
Model
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see. http://bit.ly/1LI09MJ
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Fingerprint API
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Authentication
with Fingerprint
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Available in
Nexus 5X/6P
(Nexus Imprint)
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how to use
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Use these APIs in
conjunction with
the Android
Keystore system.
— Android 6.0 APIs
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Needs keyguard
lock
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PIN
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Password
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Pattern
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Add
USE_FINGERPRINT
permission
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Add USE_FINGERPRINT
permission
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Check keyguard is
enabled
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Check keyguard is enabled
public class MainActivity extends Activity {
KeyguardManager mKeyguardManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (!mKeyguardManager.isKeyguardSecure()) {
// keyguard disabled
Toast.makeText(this,
"Secure lock screen hasn't set up.\n"
+ "Go to 'Settings -> Security -> Fingerprint' to set up a fingerprint",
Toast.LENGTH_LONG).show();
return;
}
}
}
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Check fingerprint
registered
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Check fingerprint registered
public class MainActivity extends Activity {
@Inject FingerprintManager mFingerprintManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (!mFingerprintManager.hasEnrolledFingerprints()) {
// no fingerprints registered
Toast.makeText(this,
"Go to 'Settings -> Security -> Fingerprint' and register at least one fingerprint",
Toast.LENGTH_LONG).show();
return;
}
}
}
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Create encryption
key
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Start
Authentication
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Start Authentication
mCancellationSignal = new CancellationSignal();
mFingerprintManager.authenticate(cryptoObject, mCancellationSignal, 0, this, null);
@Override
public void onAuthenticationError(int errMsgId, CharSequence errString) {
// authentication error
}
@Override
public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
// needs help?
}
@Override
public void onAuthenticationFailed() {
// failed
}
@Override
public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
// succeeded
}
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but
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These codes has
no UI
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Create UI
yourself !
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Darkness..?
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No!
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Use sample code
dialog fragment
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Two samples available
• Fingerprint Dialog
• Asymmetric Fingerprint Dialog
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No content
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!
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URL
• Android 6.0 APIs
• http://developer.android.com/intl/ja/about/versions/marshmallow/
android-6.0.html#fingerprint-authentication
• Android Keystore System
• http://developer.android.com/intl/ja/training/articles/keystore.html
• FingerprintDialog sample
• http://developer.android.com/intl/ja/samples/FingerprintDialog/
index.html
• Google Store
• https://store.google.com/category/phones
• Buy now !
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Happy secure life!