Add fingerprint on SecurityScene

app/src/main/java/com/hippo/ehviewer/ui/scene/SecurityScene.java

@@ -19,11 +19,15 @@ package com.hippo.ehviewer.ui.scene;
 import android.content.Context;
 import android.hardware.Sensor;
 import android.hardware.SensorManager;
+import android.hardware.fingerprint.FingerprintManager;
+import android.os.Build;
 import android.os.Bundle;
+import android.os.CancellationSignal;
 import android.support.annotation.Nullable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ImageView;
 
 import com.hippo.ehviewer.R;
 import com.hippo.ehviewer.Settings;
@@ -42,15 +46,21 @@ public class SecurityScene extends SolidScene implements
         LockPatternView.OnPatternListener, ShakeDetector.OnShakeListener {
 
     private static final int MAX_RETRY_TIMES = 5;
+    private static final long ERROR_TIMEOUT_MILLIS = 1200;
+    private static final long SUCCESS_DELAY_MILLIS = 100;
 
     private static final String KEY_RETRY_TIMES = "retry_times";
 
     @Nullable
     private LockPatternView mPatternView;
+    private ImageView mFingerprintIcon;
 
     private SensorManager mSensorManager;
     private Sensor mAccelerometer;
     private ShakeDetector mShakeDetector;
+    private FingerprintManager mFingerprintManager;
+
+    private CancellationSignal mFingerprintCancellationSignal;
 
     private int mRetryTimes;
 
@@ -73,6 +83,9 @@ public class SecurityScene extends SolidScene implements
                 mShakeDetector.setOnShakeListener(this);
             }
         }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            mFingerprintManager = context.getSystemService(FingerprintManager.class);
+        }
 
         if (null == savedInstanceState) {
             mRetryTimes = MAX_RETRY_TIMES;
@@ -97,6 +110,38 @@ public class SecurityScene extends SolidScene implements
         if (null != mShakeDetector) {
             mSensorManager.registerListener(mShakeDetector, mAccelerometer, SensorManager.SENSOR_DELAY_UI);
         }
+
+        if (isFingerprintAuthAvailable()) {
+            mFingerprintCancellationSignal = new CancellationSignal();
+            // The line below prevents the false positive inspection from Android Studio
+            // noinspection ResourceType
+            mFingerprintManager.authenticate(null, mFingerprintCancellationSignal, 0,
+                    new FingerprintManager.AuthenticationCallback() {
+                        @Override
+                        public void onAuthenticationError(int errMsgId, CharSequence errString) {
+                            fingerprintError(true);
+                        }
+
+                        @Override
+                        public void onAuthenticationFailed() {
+                            fingerprintError(false);
+                        }
+
+                        @Override
+                        public void onAuthenticationSucceeded(
+                                FingerprintManager.AuthenticationResult result) {
+                            mFingerprintIcon.setImageResource(R.drawable.ic_fingerprint_success);
+                            mFingerprintIcon.postDelayed(new Runnable() {
+                                @Override
+                                public void run() {
+                                    startSceneForCheckStep(CHECK_STEP_SECURITY, getArguments());
+                                    finish();
+                                }
+                            }, SUCCESS_DELAY_MILLIS);
+
+                        }
+                    }, null);
+        }
     }
 
     @Override
@@ -106,6 +151,10 @@ public class SecurityScene extends SolidScene implements
         if (null != mShakeDetector) {
             mSensorManager.unregisterListener(mShakeDetector);
         }
+        if (isFingerprintAuthAvailable() && mFingerprintCancellationSignal != null) {
+            mFingerprintCancellationSignal.cancel();
+            mFingerprintCancellationSignal = null;
+        }
     }
 
     @Override
@@ -123,6 +172,11 @@ public class SecurityScene extends SolidScene implements
         mPatternView = (LockPatternView) ViewUtils.$$(view, R.id.pattern_view);
         mPatternView.setOnPatternListener(this);
 
+        mFingerprintIcon = (ImageView) ViewUtils.$$(view, R.id.fingerprint_icon);
+        if (Settings.getEnableFingerprint() && isFingerprintAuthAvailable()) {
+            mFingerprintIcon.setVisibility(View.VISIBLE);
+            mFingerprintIcon.setImageResource(R.drawable.ic_fp_40px);
+        }
         return view;
     }
 
@@ -176,4 +230,38 @@ public class SecurityScene extends SolidScene implements
             finish();
         }
     }
+
+    private boolean isFingerprintAuthAvailable() {
+        // The line below prevents the false positive inspection from Android Studio
+        // noinspection ResourceType
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
+                && Settings.getEnableFingerprint()
+                && mFingerprintManager != null
+                && mFingerprintManager.isHardwareDetected()
+                && mFingerprintManager.hasEnrolledFingerprints();
+    }
+
+    private Runnable mResetFingerprintRunnable = new Runnable() {
+        @Override
+        public void run() {
+            if (mFingerprintIcon != null)
+                mFingerprintIcon.setImageResource(R.drawable.ic_fp_40px);
+        }
+    };
+
+    private void fingerprintError(boolean unrecoverable) {
+        // Do not decrease mRetryTimes here since Android system will handle it :)
+        mFingerprintIcon.setImageResource(R.drawable.ic_fingerprint_error);
+        mFingerprintIcon.removeCallbacks(mResetFingerprintRunnable);
+        if (unrecoverable) {
+            mFingerprintIcon.postDelayed(new Runnable() {
+                @Override
+                public void run() {
+                    mFingerprintIcon.setVisibility(View.INVISIBLE);
+                }
+            }, ERROR_TIMEOUT_MILLIS);
+        } else {
+            mFingerprintIcon.postDelayed(mResetFingerprintRunnable, ERROR_TIMEOUT_MILLIS);
+        }
+    }
 }