Biometrics lock (closes #1686)

2020-02-21 22:58:19 -05:00
parent aa05458f1d
commit 8bb83782c7
11 changed files with 174 additions and 1 deletions
@@ -0,0 +1,45 @@
+package eu.kanade.tachiyomi.ui.security
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.biometric.BiometricPrompt
+import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import uy.kohesive.injekt.injectLazy
+import java.util.Date
+import java.util.concurrent.Executors
+
+/**
+ * Blank activity with a BiometricPrompt.
+ */
+class BiometricUnlockActivity : AppCompatActivity() {
+
+    private val preferences: PreferencesHelper by injectLazy()
+    private val executor = Executors.newSingleThreadExecutor()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val biometricPrompt = BiometricPrompt(this, executor, object : BiometricPrompt.AuthenticationCallback() {
+            override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
+                super.onAuthenticationError(errorCode, errString)
+                finishAffinity()
+            }
+
+            override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
+                super.onAuthenticationSucceeded(result)
+                BiometricUnlockDelegate.locked = false
+                preferences.lastAppUnlock().set(Date().time)
+                finish()
+            }
+        })
+
+        val promptInfo = BiometricPrompt.PromptInfo.Builder()
+                .setTitle(getString(R.string.unlock_library))
+                .setDeviceCredentialAllowed(true)
+                .build()
+
+        biometricPrompt.authenticate(promptInfo)
+    }
+
+}
@@ -0,0 +1,36 @@
+package eu.kanade.tachiyomi.ui.security
+
+import android.content.Intent
+import androidx.biometric.BiometricManager
+import androidx.fragment.app.FragmentActivity
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
+import uy.kohesive.injekt.injectLazy
+import java.util.Date
+
+object BiometricUnlockDelegate {
+
+    private val preferences by injectLazy<PreferencesHelper>()
+
+    var locked: Boolean = true
+
+    fun onResume(activity: FragmentActivity) {
+        val lockApp = preferences.useBiometricLock().getOrDefault()
+        if (lockApp && BiometricManager.from(activity).canAuthenticate() == BiometricManager.BIOMETRIC_SUCCESS) {
+            if (isAppLocked()) {
+                val intent = Intent(activity, BiometricUnlockActivity::class.java)
+                activity.startActivity(intent)
+                activity.overridePendingTransition(0, 0)
+            }
+        } else if (lockApp) {
+            preferences.useBiometricLock().set(false)
+        }
+    }
+
+    private fun isAppLocked(): Boolean {
+        return locked &&
+                (preferences.lockAppAfter().getOrDefault() <= 0
+                        || Date().time >= preferences.lastAppUnlock().getOrDefault() + 60 * 1000 * preferences.lockAppAfter().getOrDefault())
+    }
+
+}