Add video to each gesture preference screen.

- Refactor GesturePreference to a generic VideoPreference.
- The old video_preference.xml is only for magnification video, so
  renamed.
- And use VideoPreference in gesture setting pages.
- Refactor common logic into GesturePreferenceController.

Bug: 32637613
Test: RunSettingsRoboTests

Change-Id: I58580b01a32873cb32c5dc5bf2ec021d5b1400cc

src/com/android/settings/gestures/DoubleTapScreenPreferenceController.java

@@ -20,23 +20,22 @@ import android.annotation.UserIdInt;
 import android.content.Context;
 import android.provider.Settings;
 import android.support.v7.preference.Preference;
-import android.support.v7.preference.TwoStatePreference;
 
 import com.android.internal.hardware.AmbientDisplayConfiguration;
-import com.android.settings.core.PreferenceController;
+import com.android.settings.core.lifecycle.Lifecycle;
 
-public class DoubleTapScreenPreferenceController extends PreferenceController
-        implements Preference.OnPreferenceChangeListener {
+public class DoubleTapScreenPreferenceController extends GesturePreferenceController {
 
+    private static final String PREF_KEY_VIDEO = "gesture_double_tap_screen_video";
     private static final String PREF_KEY_DOUBLE_TAP_SCREEN = "gesture_double_tap_screen";
 
     private final AmbientDisplayConfiguration mAmbientConfig;
     @UserIdInt
     private final int mUserId;
 
-    public DoubleTapScreenPreferenceController(Context context, AmbientDisplayConfiguration config,
-            @UserIdInt int userId) {
-        super(context);
+    public DoubleTapScreenPreferenceController(Context context, Lifecycle lifecycle,
+            AmbientDisplayConfiguration config, @UserIdInt int userId) {
+        super(context, lifecycle);
         mAmbientConfig = config;
         mUserId = userId;
     }
@@ -46,25 +45,6 @@ public class DoubleTapScreenPreferenceController extends PreferenceController
         return mAmbientConfig.pulseOnDoubleTapAvailable();
     }
 
-    @Override
-    public boolean handlePreferenceTreeClick(Preference preference) {
-        return false;
-    }
-
-    @Override
-    public void updateState(Preference preference) {
-        final boolean isEnabled = mAmbientConfig.pulseOnDoubleTapEnabled(mUserId);
-        if (preference != null) {
-            if (preference instanceof TwoStatePreference) {
-                ((TwoStatePreference) preference).setChecked(isEnabled);
-            } else {
-                preference.setSummary(isEnabled
-                        ? com.android.settings.R.string.gesture_setting_on
-                        : com.android.settings.R.string.gesture_setting_off);
-            }
-        }
-    }
-
     @Override
     public String getPreferenceKey() {
         return PREF_KEY_DOUBLE_TAP_SCREEN;
@@ -77,4 +57,14 @@ public class DoubleTapScreenPreferenceController extends PreferenceController
                 Settings.Secure.DOZE_PULSE_ON_DOUBLE_TAP, enabled ? 1 : 0);
         return true;
     }
+
+    @Override
+    protected String getVideoPrefKey() {
+        return PREF_KEY_VIDEO;
+    }
+
+    @Override
+    protected boolean isSwitchPrefEnabled() {
+        return mAmbientConfig.pulseOnDoubleTapEnabled(mUserId);
+    }
 }