Fix face/fingerprint consent primary footer button logic

Currently, the primary footer button on the face and fingerprint enroll
consent pages reads "I agree" even before the user has scrolled to the
bottom of the screen. This commit fixes the issue so that "More" is
displayed until the user scrolls to the bottom. The remaining logic is
left intact.

Test: Manual:
1. Start face or fingerprint enrollment
2. Confirm primary button shows "More" and secondary button is hidden
3. Press the "More" button or scroll to the bottom of the screen
4. Ensure primary button shows "I agree" and secondary shows "No thanks"

Fixes: 189268868
Change-Id: I02fa47d1de83bd5b5d82c733495ae579cbd2d6c6
diff --git a/src/com/android/settings/biometrics/BiometricEnrollIntroduction.java b/src/com/android/settings/biometrics/BiometricEnrollIntroduction.java
index de85067..580c753 100644
--- a/src/com/android/settings/biometrics/BiometricEnrollIntroduction.java
+++ b/src/com/android/settings/biometrics/BiometricEnrollIntroduction.java
@@ -29,6 +29,7 @@
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
 
 import com.android.internal.widget.LockPatternUtils;
 import com.android.settings.R;
@@ -36,11 +37,12 @@
 import com.android.settings.password.ChooseLockGeneric;
 import com.android.settings.password.ChooseLockSettingsHelper;
 
+import com.google.android.setupcompat.template.FooterBarMixin;
 import com.google.android.setupcompat.template.FooterButton;
 import com.google.android.setupcompat.util.WizardManagerHelper;
+import com.google.android.setupdesign.GlifLayout;
 import com.google.android.setupdesign.span.LinkSpan;
 import com.google.android.setupdesign.template.RequireScrollMixin;
-import com.google.android.setupdesign.template.RequireScrollMixin.OnRequireScrollStateChangedListener;
 import com.google.android.setupdesign.util.DynamicColorPalette;
 
 /**
@@ -183,32 +185,26 @@
             }
         }
 
-        FooterButton primaryButton = getPrimaryFooterButton();
-        FooterButton secondaryButton = getSecondaryFooterButton();
-        if (primaryButton == null) {
-            Log.d(TAG, "getPrimaryFooterButton() was null");
-            return;
-        }
+        final GlifLayout layout = getLayout();
+        mFooterBarMixin = layout.getMixin(FooterBarMixin.class);
+        mFooterBarMixin.setPrimaryButton(getPrimaryFooterButton());
+        mFooterBarMixin.setSecondaryButton(getSecondaryFooterButton(), true /* usePrimaryStyle */);
+        mFooterBarMixin.getSecondaryButton().setVisibility(View.INVISIBLE);
 
-        if (secondaryButton == null) {
-            Log.d(TAG, "getSecondaryFooterButton() was null");
-            return;
-        }
-
-        // Setup scroll mixin
-        final RequireScrollMixin requireScrollMixin = getLayout().getMixin(
-                RequireScrollMixin.class);
-        requireScrollMixin.requireScrollWithButton(this, primaryButton, getScrollCompletedText(),
-                this::onNextButtonClick);
-
-        secondaryButton.setVisibility(View.INVISIBLE);
+        final RequireScrollMixin requireScrollMixin = layout.getMixin(RequireScrollMixin.class);
+        requireScrollMixin.requireScrollWithButton(this, getPrimaryFooterButton(),
+                getMoreButtonTextRes(), this::onNextButtonClick);
         requireScrollMixin.setOnRequireScrollStateChangedListener(
-                new OnRequireScrollStateChangedListener() {
-                    @Override
-                    public void onRequireScrollStateChanged(boolean scrollNeeded) {
-                        if (!scrollNeeded && secondaryButton.getVisibility() == View.INVISIBLE) {
-                            secondaryButton.setVisibility(View.VISIBLE);
-                        }
+                scrollNeeded -> {
+                    // Update text of primary button from "More" to "Agree".
+                    final int primaryButtonTextRes = scrollNeeded
+                            ? getMoreButtonTextRes()
+                            : getAgreeButtonTextRes();
+                    getPrimaryFooterButton().setText(this, primaryButtonTextRes);
+
+                    // Show secondary button once scroll is completed.
+                    if (!scrollNeeded) {
+                        getSecondaryFooterButton().setVisibility(View.VISIBLE);
                     }
                 });
     }
@@ -367,17 +363,15 @@
         return mIconColorFilter;
     }
 
-    @Nullable
-    protected FooterButton getPrimaryFooterButton() {
-        return null;
-    }
+    @NonNull
+    protected abstract FooterButton getPrimaryFooterButton();
 
-    @Nullable
-    protected FooterButton getSecondaryFooterButton() {
-        return null;
-    }
+    @NonNull
+    protected abstract FooterButton getSecondaryFooterButton();
 
-    protected int getScrollCompletedText() {
-        return R.string.security_settings_face_enroll_introduction_more;
-    }
+    @StringRes
+    protected abstract int getAgreeButtonTextRes();
+
+    @StringRes
+    protected abstract int getMoreButtonTextRes();
 }
diff --git a/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java b/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
index b29e284..8e733b4 100644
--- a/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
+++ b/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
@@ -26,6 +26,10 @@
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
+
 import com.android.settings.R;
 import com.android.settings.Utils;
 import com.android.settings.biometrics.BiometricEnrollIntroduction;
@@ -34,7 +38,6 @@
 import com.android.settings.password.ChooseLockSettingsHelper;
 import com.android.settingslib.RestrictedLockUtilsInternal;
 
-import com.google.android.setupcompat.template.FooterBarMixin;
 import com.google.android.setupcompat.template.FooterButton;
 import com.google.android.setupcompat.util.WizardManagerHelper;
 import com.google.android.setupdesign.span.LinkSpan;
@@ -50,6 +53,8 @@
 
     private FaceManager mFaceManager;
     private FaceFeatureProvider mFaceFeatureProvider;
+    @Nullable private FooterButton mPrimaryFooterButton;
+    @Nullable private FooterButton mSecondaryFooterButton;
 
     @Override
     protected void onCancelButtonClick(View view) {
@@ -207,38 +212,42 @@
     }
 
     @Override
+    @NonNull
     protected FooterButton getPrimaryFooterButton() {
-        if (mFooterBarMixin == null) {
-            mFooterBarMixin = getLayout().getMixin(FooterBarMixin.class);
-        }
-
-        if (mFooterBarMixin.getPrimaryButton() == null) {
-            final FooterButton nextButtonBuilder = new FooterButton.Builder(this)
+        if (mPrimaryFooterButton == null) {
+            mPrimaryFooterButton = new FooterButton.Builder(this)
                     .setText(R.string.security_settings_face_enroll_introduction_agree)
                     .setButtonType(FooterButton.ButtonType.OPT_IN)
                     .setListener(this::onNextButtonClick)
                     .setTheme(R.style.SudGlifButton_Primary)
                     .build();
-            mFooterBarMixin.setPrimaryButton(nextButtonBuilder);
         }
-        return mFooterBarMixin.getPrimaryButton();
+        return mPrimaryFooterButton;
     }
 
     @Override
+    @NonNull
     protected FooterButton getSecondaryFooterButton() {
-        if (mFooterBarMixin == null) {
-            mFooterBarMixin = getLayout().getMixin(FooterBarMixin.class);
-        }
-
-        if (mFooterBarMixin.getSecondaryButton() == null) {
-            final FooterButton noThanksButton = new FooterButton.Builder(this)
+        if (mSecondaryFooterButton == null) {
+            mSecondaryFooterButton = new FooterButton.Builder(this)
                     .setText(R.string.security_settings_face_enroll_introduction_no_thanks)
                     .setListener(this::onSkipButtonClick)
                     .setButtonType(FooterButton.ButtonType.NEXT)
                     .setTheme(R.style.SudGlifButton_Primary)
                     .build();
-            mFooterBarMixin.setSecondaryButton(noThanksButton, true /* usePrimaryStyle */);
         }
-        return mFooterBarMixin.getSecondaryButton();
+        return mSecondaryFooterButton;
+    }
+
+    @Override
+    @StringRes
+    protected int getAgreeButtonTextRes() {
+        return R.string.security_settings_fingerprint_enroll_introduction_agree;
+    }
+
+    @Override
+    @StringRes
+    protected int getMoreButtonTextRes() {
+        return R.string.security_settings_face_enroll_introduction_more;
     }
 }
diff --git a/src/com/android/settings/biometrics/fingerprint/FingerprintEnrollIntroduction.java b/src/com/android/settings/biometrics/fingerprint/FingerprintEnrollIntroduction.java
index 8a070ab..5142e21 100644
--- a/src/com/android/settings/biometrics/fingerprint/FingerprintEnrollIntroduction.java
+++ b/src/com/android/settings/biometrics/fingerprint/FingerprintEnrollIntroduction.java
@@ -27,6 +27,10 @@
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
+
 import com.android.settings.R;
 import com.android.settings.Utils;
 import com.android.settings.biometrics.BiometricEnrollIntroduction;
@@ -35,7 +39,6 @@
 import com.android.settingslib.HelpUtils;
 import com.android.settingslib.RestrictedLockUtilsInternal;
 
-import com.google.android.setupcompat.template.FooterBarMixin;
 import com.google.android.setupcompat.template.FooterButton;
 import com.google.android.setupdesign.span.LinkSpan;
 
@@ -46,6 +49,8 @@
     private static final String TAG = "FingerprintIntro";
 
     private FingerprintManager mFingerprintManager;
+    @Nullable private FooterButton mPrimaryFooterButton;
+    @Nullable private FooterButton mSecondaryFooterButton;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -194,43 +199,42 @@
     }
 
     @Override
+    @NonNull
     protected FooterButton getPrimaryFooterButton() {
-        if (mFooterBarMixin == null) {
-            mFooterBarMixin = getLayout().getMixin(FooterBarMixin.class);
-        }
-
-        if (mFooterBarMixin.getPrimaryButton() == null) {
-            final FooterButton nextButtonBuilder = new FooterButton.Builder(this)
+        if (mPrimaryFooterButton == null) {
+            mPrimaryFooterButton = new FooterButton.Builder(this)
                     .setText(R.string.security_settings_fingerprint_enroll_introduction_agree)
                     .setListener(this::onNextButtonClick)
                     .setButtonType(FooterButton.ButtonType.OPT_IN)
                     .setTheme(R.style.SudGlifButton_Primary)
                     .build();
-            mFooterBarMixin.setPrimaryButton(nextButtonBuilder);
         }
-        return mFooterBarMixin.getPrimaryButton();
+        return mPrimaryFooterButton;
     }
 
     @Override
+    @NonNull
     protected FooterButton getSecondaryFooterButton() {
-        if (mFooterBarMixin == null) {
-            mFooterBarMixin = getLayout().getMixin(FooterBarMixin.class);
-        }
-
-        if (mFooterBarMixin.getSecondaryButton() == null) {
-            final FooterButton noThanksButton = new FooterButton.Builder(this)
+        if (mSecondaryFooterButton == null) {
+            mSecondaryFooterButton = new FooterButton.Builder(this)
                     .setText(getNegativeButtonTextId())
                     .setListener(this::onSkipButtonClick)
                     .setButtonType(FooterButton.ButtonType.NEXT)
                     .setTheme(R.style.SudGlifButton_Primary)
                     .build();
-            mFooterBarMixin.setSecondaryButton(noThanksButton, true /* usePrimaryStyle */);
         }
-        return mFooterBarMixin.getSecondaryButton();
+        return mSecondaryFooterButton;
     }
 
     @Override
-    protected int getScrollCompletedText() {
+    @StringRes
+    protected int getAgreeButtonTextRes() {
+        return R.string.security_settings_fingerprint_enroll_introduction_agree;
+    }
+
+    @Override
+    @StringRes
+    protected int getMoreButtonTextRes() {
         return R.string.security_settings_face_enroll_introduction_more;
     }
 }