Add default button to vibration/volume settings dialog

Change-Id: I7beb4517314efdefeb47d91b14a6b02c3075c19f

java/res/values/strings.xml

@@ -376,4 +376,7 @@
     <string name="prefs_keypress_vibration_duration_settings">Keypress vibration duration settings</string>
     <!-- Title of the settings for keypress sound volume -->
     <string name="prefs_keypress_sound_volume_settings">Keypress sound volume settings</string>
+
+    <!-- Title of the button to revert to the default value of the device in the settings dialog [CHAR LIMIT=15] -->
+    <string name="button_default">Default</string>
 </resources>

java/src/com/android/inputmethod/latin/Settings.java

@@ -168,19 +168,21 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
     public static float readKeypressSoundVolume(final SharedPreferences prefs,
             final Resources res) {
         final float volume = prefs.getFloat(PREF_KEYPRESS_SOUND_VOLUME, -1.0f);
-        if (volume >= 0) {
+        return (volume >= 0) ? volume : readDefaultKeypressSoundVolume(res);
-            return volume;
+    }
-        }
+
+    public static float readDefaultKeypressSoundVolume(final Resources res) {
         return Float.parseFloat(
                 ResourceUtils.getDeviceOverrideValue(res, R.array.keypress_volumes));
     }
 
-    public static int readVibrationDuration(final SharedPreferences prefs,
+    public static int readKeypressVibrationDuration(final SharedPreferences prefs,
             final Resources res) {
         final int ms = prefs.getInt(PREF_VIBRATION_DURATION_SETTINGS, -1);
-        if (ms >= 0) {
+        return (ms >= 0) ? ms : readDefaultKeypressVibrationDuration(res);
-            return ms;
+    }
-        }
+
+    public static int readDefaultKeypressVibrationDuration(final Resources res) {
         return Integer.parseInt(
                 ResourceUtils.getDeviceOverrideValue(res, R.array.keypress_vibration_durations));
     }

java/src/com/android/inputmethod/latin/SettingsFragment.java

@@ -180,7 +180,7 @@ public final class SettingsFragment extends InputMethodSettingsFragment
                     });
             mKeypressVibrationDurationSettingsPref.setSummary(
                     res.getString(R.string.settings_keypress_vibration_duration,
-                            Settings.readVibrationDuration(prefs, res)));
+                            Settings.readKeypressVibrationDuration(prefs, res)));
         }
 
         mKeypressSoundVolumeSettingsPref =
@@ -312,11 +312,23 @@ public final class SettingsFragment extends InputMethodSettingsFragment
                 sp.edit().putInt(Settings.PREF_VIBRATION_DURATION_SETTINGS, value).apply();
             }
 
+            private void feedbackSettingsValue(final int value) {
+                AudioAndHapticFeedbackManager.getInstance().vibrate(value);
+            }
+
             @Override
             public void onPositiveButtonClick(final SeekBarDialog dialog) {
                 writePreference(sp, dialog.getValue());
             }
 
+            @Override
+            public void onNeutralButtonClick(final SeekBarDialog dialog) {
+                final int defaultValue =
+                        Settings.readDefaultKeypressVibrationDuration(context.getResources());
+                dialog.setValue(defaultValue, false /* fromUser */);
+                writePreference(sp, defaultValue);
+            }
+
             @Override
             public void onDismiss(final SeekBarDialog dialog) {
                 if (settingsPref != null) {
@@ -326,13 +338,13 @@ public final class SettingsFragment extends InputMethodSettingsFragment
 
             @Override
             public void onStopTrackingTouch(final SeekBarDialog dialog) {
-                final int ms = dialog.getValue();
+                feedbackSettingsValue(dialog.getValue());
-                AudioAndHapticFeedbackManager.getInstance().vibrate(ms);
             }
         };
-        final int currentMs = Settings.readVibrationDuration(sp, getResources());
+        final int currentMs = Settings.readKeypressVibrationDuration(sp, getResources());
         final SeekBarDialog.Builder builder = new SeekBarDialog.Builder(context);
         builder.setTitle(R.string.prefs_keypress_vibration_duration_settings)
+                .setNeutralButtonText(R.string.button_default)
                 .setListener(listener)
                 .setMaxValue(AudioAndHapticFeedbackManager.MAX_KEYPRESS_VIBRATION_DURATION)
                 .setValueFromat(R.string.settings_keypress_vibration_duration)
@@ -359,11 +371,23 @@ public final class SettingsFragment extends InputMethodSettingsFragment
                 sp.edit().putFloat(Settings.PREF_KEYPRESS_SOUND_VOLUME, value).apply();
             }
 
+            private void feedbackSettingsValue(final float value) {
+                am.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD, value);
+            }
+
             @Override
             public void onPositiveButtonClick(final SeekBarDialog dialog) {
                 writePreference(sp, dialog.getValue() / PERCENT_FLOAT);
             }
 
+            @Override
+            public void onNeutralButtonClick(final SeekBarDialog dialog) {
+                final float defaultValue =
+                        Settings.readDefaultKeypressSoundVolume(context.getResources());
+                dialog.setValue((int)(defaultValue * PERCENT_INT), false /* fromUser */);
+                writePreference(sp, defaultValue);
+            }
+
             @Override
             public void onDismiss(final SeekBarDialog dialog) {
                 if (settingsPref != null) {
@@ -373,13 +397,13 @@ public final class SettingsFragment extends InputMethodSettingsFragment
 
             @Override
             public void onStopTrackingTouch(final SeekBarDialog dialog) {
-                final float volume = dialog.getValue() / PERCENT_FLOAT;
+                feedbackSettingsValue(dialog.getValue() / PERCENT_FLOAT);
-                am.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD, volume);
             }
         };
         final SeekBarDialog.Builder builder = new SeekBarDialog.Builder(context);
         final int currentVolumeInt = getCurrentKeyPressSoundVolumePercent(sp, getResources());
         builder.setTitle(R.string.prefs_keypress_sound_volume_settings)
+                .setNeutralButtonText(R.string.button_default)
                 .setListener(listener)
                 .setMaxValue(PERCENT_INT)
                 .setValue(currentVolumeInt)

java/src/com/android/inputmethod/latin/SettingsValues.java

@@ -139,7 +139,7 @@ public final class SettingsValues {
         mBigramPredictionEnabled = readBigramPredictionEnabled(prefs, res);
 
         // Compute other readable settings
-        mKeypressVibrationDuration = Settings.readVibrationDuration(prefs, res);
+        mKeypressVibrationDuration = Settings.readKeypressVibrationDuration(prefs, res);
         mKeypressSoundVolume = Settings.readKeypressSoundVolume(prefs, res);
         mKeyPreviewPopupDismissDelay = Settings.readKeyPreviewPopupDismissDelay(prefs, res);
         mAutoCorrectionThreshold = readAutoCorrectionThreshold(res,