41 lines
1.3 KiB
Java
41 lines
1.3 KiB
Java
/*
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* Copyright (C) 2015 Hippo Seven
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.easyrecyclerview;
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import android.content.Context;
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import androidx.recyclerview.widget.LinearSmoothScroller;
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public abstract class SimpleSmoothScroller extends LinearSmoothScroller {
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private final float mMillisecondsPerPx;
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public SimpleSmoothScroller(Context context, float millisecondsPerInch) {
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super(context);
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mMillisecondsPerPx = millisecondsPerInch / context.getResources().getDisplayMetrics().densityDpi;
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}
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@Override
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protected int calculateTimeForScrolling(int dx) {
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if (mMillisecondsPerPx <= 0) {
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return super.calculateTimeForScrolling(dx);
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} else {
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return (int) Math.ceil(Math.abs(dx) * mMillisecondsPerPx);
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}
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}
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}
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