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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3.util;
import static android.os.VibrationEffect.createPredefined;
import static android.provider.Settings.System.HAPTIC_FEEDBACK_ENABLED;
import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
import android.annotation.TargetApi;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.os.Build;
import android.os.VibrationEffect;
import android.os.Vibrator;
import android.provider.Settings;
/**
* Wrapper around {@link Vibrator} to easily perform haptic feedback where necessary.
*/
@TargetApi(Build.VERSION_CODES.Q)
public class VibratorWrapper {
public static final MainThreadInitializedObject<VibratorWrapper> INSTANCE =
new MainThreadInitializedObject<>(VibratorWrapper::new);
private static final VibrationEffect EFFECT_CLICK =
createPredefined(VibrationEffect.EFFECT_CLICK);
/**
* Haptic when entering overview.
*/
public static final VibrationEffect OVERVIEW_HAPTIC = EFFECT_CLICK;
private final Vibrator mVibrator;
private final boolean mHasVibrator;
private boolean mIsHapticFeedbackEnabled;
public VibratorWrapper(Context context) {
mVibrator = context.getSystemService(Vibrator.class);
mHasVibrator = mVibrator.hasVibrator();
if (mHasVibrator) {
final ContentResolver resolver = context.getContentResolver();
mIsHapticFeedbackEnabled = isHapticFeedbackEnabled(resolver);
final ContentObserver observer = new ContentObserver(MAIN_EXECUTOR.getHandler()) {
@Override
public void onChange(boolean selfChange) {
mIsHapticFeedbackEnabled = isHapticFeedbackEnabled(resolver);
}
};
resolver.registerContentObserver(Settings.System.getUriFor(HAPTIC_FEEDBACK_ENABLED),
false /* notifyForDescendents */, observer);
} else {
mIsHapticFeedbackEnabled = false;
}
}
private boolean isHapticFeedbackEnabled(ContentResolver resolver) {
return Settings.System.getInt(resolver, HAPTIC_FEEDBACK_ENABLED, 0) == 1;
}
/** Vibrates with the given effect if haptic feedback is available and enabled. */
public void vibrate(VibrationEffect vibrationEffect) {
if (mHasVibrator && mIsHapticFeedbackEnabled) {
UI_HELPER_EXECUTOR.execute(() -> mVibrator.vibrate(vibrationEffect));
}
}
}
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