Show a dialog preventing fingerprint enrollment in split mode.

Test: atest CombinedBiometricProfileSettingsTest
Test: atest FingerprintSettingsFragmentTest
Test: manaul test- go to split screen mode and try to enroll
fingerprint
Bug: 246247132

Change-Id: I12357d197f2ceda8c1f1f582cdecb20fd18e30f7

src/com/android/settings/biometrics/combination/BiometricsSettingsBase.java

@@ -41,6 +41,7 @@ import com.android.settings.R;
 import com.android.settings.Utils;
 import com.android.settings.biometrics.BiometricEnrollBase;
 import com.android.settings.biometrics.BiometricUtils;
+import com.android.settings.biometrics.fingerprint.FingerprintSettings.FingerprintSettingsFragment;
 import com.android.settings.core.SettingsBaseActivity;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.password.ChooseLockGeneric;
@@ -166,6 +167,14 @@ public abstract class BiometricsSettingsBase extends DashboardFragment {
             return true;
         } else if (getFingerprintPreferenceKey().equals(key)) {
             mDoNotFinishActivity = true;
+
+            if (shouldSkipForUdfpsInMultiWindowMode()) {
+                new FingerprintSettingsFragment.FingerprintSplitScreenDialog().show(
+                        getActivity().getSupportFragmentManager(),
+                        FingerprintSettingsFragment.FingerprintSplitScreenDialog.class.getName());
+                return true;
+            }
+
             mFingerprintManager.generateChallenge(mUserId, (sensorId, userId, challenge) -> {
                 try {
                     final byte[] token = requestGatekeeperHat(context, mGkPwHandle, mUserId,
@@ -377,4 +386,27 @@ public abstract class BiometricsSettingsBase extends DashboardFragment {
             return 0;
         }
     }
+
+    /**
+     * Returns whether the click should be skipped.
+     * True if the following conditions are all met:
+     * 1. It's split mode.
+     * 2. It's udfps.
+     * 3. There is no enrolled fingerprint. (If there is enrolled fingerprint, FingerprintSettings
+     * will handle the adding fingerprint.
+     */
+    private boolean shouldSkipForUdfpsInMultiWindowMode() {
+        if (!getActivity().isInMultiWindowMode() || mFingerprintManager.hasEnrolledFingerprints(
+                mUserId)) {
+            return false;
+        }
+
+        for (FingerprintSensorPropertiesInternal prop :
+                mFingerprintManager.getSensorPropertiesInternal()) {
+            if (prop.isAnyUdfpsType()) {
+                return true;
+            }
+        }
+        return false;
+    }
 }

src/com/android/settings/biometrics/fingerprint/FingerprintSettings.java

@@ -159,7 +159,8 @@ public class FingerprintSettings extends SubSettings {
 
         private static final String TAG = "FingerprintSettings";
         private static final String KEY_FINGERPRINT_ITEM_PREFIX = "key_fingerprint_item";
-        private static final String KEY_FINGERPRINT_ADD = "key_fingerprint_add";
+        @VisibleForTesting
+        static final String KEY_FINGERPRINT_ADD = "key_fingerprint_add";
         private static final String KEY_FINGERPRINT_ENABLE_KEYGUARD_TOGGLE =
                 "fingerprint_enable_keyguard_toggle";
         private static final String KEY_LAUNCHED_CONFIRM = "launched_confirm";
@@ -178,8 +179,8 @@ public class FingerprintSettings extends SubSettings {
 
         private static final int CONFIRM_REQUEST = 101;
         private static final int CHOOSE_LOCK_GENERIC_REQUEST = 102;
-
-        private static final int ADD_FINGERPRINT_REQUEST = 10;
+        @VisibleForTesting
+        static final int ADD_FINGERPRINT_REQUEST = 10;
         private static final int AUTO_ADD_FIRST_FINGERPRINT_REQUEST = 11;
 
         protected static final boolean DEBUG = false;
@@ -694,6 +695,15 @@ public class FingerprintSettings extends SubSettings {
         public boolean onPreferenceTreeClick(Preference pref) {
             final String key = pref.getKey();
             if (KEY_FINGERPRINT_ADD.equals(key)) {
+                // If it's udfps in split mode, show the error dialog and don't need to show adding
+                // fingerprint intent.
+                if (shouldSkipForUdfpsInMultiWindowMode()) {
+                    new FingerprintSplitScreenDialog().show(
+                            getActivity().getSupportFragmentManager(),
+                            FingerprintSplitScreenDialog.class.getName());
+                    return true;
+                }
+
                 mIsEnrolling = true;
                 Intent intent = new Intent();
                 if (FeatureFlagUtils.isEnabled(getContext(),
@@ -997,6 +1007,14 @@ public class FingerprintSettings extends SubSettings {
             updatePreferences();
         }
 
+        /**
+         * Returns whether the click should be skipped.
+         * True if it's udfps and it's in split mode.
+         */
+        private boolean shouldSkipForUdfpsInMultiWindowMode() {
+            return getActivity().isInMultiWindowMode() && isUdfps();
+        }
+
         private final Runnable mFingerprintLockoutReset = new Runnable() {
             @Override
             public void run() {
@@ -1246,6 +1264,29 @@ public class FingerprintSettings extends SubSettings {
                 return alertDialog;
             }
         }
+
+        /**
+         * This alert dialog shows when fingerprint is being added in multi window mode.
+         */
+        public static class FingerprintSplitScreenDialog extends InstrumentedDialogFragment {
+            @Override
+            public Dialog onCreateDialog(Bundle savedInstanceState) {
+                AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+                builder.setTitle(
+                                R.string.biometric_settings_add_fingerprint_in_split_mode_title)
+                        .setMessage(
+                                R.string.biometric_settings_add_fingerprint_in_split_mode_message)
+                        .setPositiveButton(
+                                R.string.biometric_settings_add_fingerprint_in_split_mode_ok,
+                                (DialogInterface.OnClickListener) (dialog, which) -> dialog.dismiss());
+                return builder.create();
+            }
+
+            @Override
+            public int getMetricsCategory() {
+                return SettingsEnums.DIALOG_ADD_FINGERPRINT_ERROR_IN_SPLIT_MODE;
+            }
+        }
     }
 
     public static class FingerprintPreference extends TwoTargetPreference {