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/*
* Copyright (C) 2018 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.settings.widget;
import static com.android.settings.SettingsActivity.EXTRA_FRAGMENT_ARG_KEY;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ArgbEvaluator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import androidx.annotation.VisibleForTesting;
import androidx.preference.PreferenceGroup;
import androidx.preference.PreferenceGroupAdapter;
import androidx.preference.PreferenceScreen;
import androidx.preference.PreferenceViewHolder;
import androidx.recyclerview.widget.RecyclerView;
import android.text.TextUtils;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import com.android.settings.R;
import com.android.settings.SettingsPreferenceFragment;
public class HighlightablePreferenceGroupAdapter extends PreferenceGroupAdapter {
private static final String TAG = "HighlightableAdapter";
@VisibleForTesting
static final long DELAY_HIGHLIGHT_DURATION_MILLIS = 600L;
private static final long HIGHLIGHT_DURATION = 15000L;
private static final long HIGHLIGHT_FADE_OUT_DURATION = 500L;
private static final long HIGHLIGHT_FADE_IN_DURATION = 200L;
@VisibleForTesting
final int mHighlightColor;
@VisibleForTesting
boolean mFadeInAnimated;
private final int mNormalBackgroundRes;
private final String mHighlightKey;
private boolean mHighlightRequested;
private int mHighlightPosition = RecyclerView.NO_POSITION;
/**
* Tries to override initial expanded child count.
* <p/>
* Initial expanded child count will be ignored if:
* 1. fragment contains request to highlight a particular row.
* 2. count value is invalid.
*/
public static void adjustInitialExpandedChildCount(SettingsPreferenceFragment host) {
if (host == null) {
return;
}
final PreferenceScreen screen = host.getPreferenceScreen();
if (screen == null) {
return;
}
final Bundle arguments = host.getArguments();
if (arguments != null) {
final String highlightKey = arguments.getString(EXTRA_FRAGMENT_ARG_KEY);
if (!TextUtils.isEmpty(highlightKey)) {
// Has highlight row - expand everything
screen.setInitialExpandedChildrenCount(Integer.MAX_VALUE);
return;
}
}
final int initialCount = host.getInitialExpandedChildCount();
if (initialCount <= 0) {
return;
}
screen.setInitialExpandedChildrenCount(initialCount);
}
public HighlightablePreferenceGroupAdapter(PreferenceGroup preferenceGroup, String key,
boolean highlightRequested) {
super(preferenceGroup);
mHighlightKey = key;
mHighlightRequested = highlightRequested;
final Context context = preferenceGroup.getContext();
final TypedValue outValue = new TypedValue();
context.getTheme().resolveAttribute(android.R.attr.selectableItemBackground,
outValue, true /* resolveRefs */);
mNormalBackgroundRes = outValue.resourceId;
mHighlightColor = context.getColor(R.color.preference_highligh_color);
}
@Override
public void onBindViewHolder(PreferenceViewHolder holder, int position) {
super.onBindViewHolder(holder, position);
updateBackground(holder, position);
}
@VisibleForTesting
void updateBackground(PreferenceViewHolder holder, int position) {
View v = holder.itemView;
if (position == mHighlightPosition) {
// This position should be highlighted. If it's highlighted before - skip animation.
addHighlightBackground(v, !mFadeInAnimated);
} else if (Boolean.TRUE.equals(v.getTag(R.id.preference_highlighted))) {
// View with highlight is reused for a view that should not have highlight
removeHighlightBackground(v, false /* animate */);
}
}
public void requestHighlight(View root, RecyclerView recyclerView) {
if (mHighlightRequested || recyclerView == null || TextUtils.isEmpty(mHighlightKey)) {
return;
}
root.postDelayed(() -> {
final int position = getPreferenceAdapterPosition(mHighlightKey);
if (position < 0) {
return;
}
mHighlightRequested = true;
recyclerView.smoothScrollToPosition(position);
mHighlightPosition = position;
notifyItemChanged(position);
}, DELAY_HIGHLIGHT_DURATION_MILLIS);
}
public boolean isHighlightRequested() {
return mHighlightRequested;
}
@VisibleForTesting
void requestRemoveHighlightDelayed(View v) {
v.postDelayed(() -> {
mHighlightPosition = RecyclerView.NO_POSITION;
removeHighlightBackground(v, true /* animate */);
}, HIGHLIGHT_DURATION);
}
private void addHighlightBackground(View v, boolean animate) {
v.setTag(R.id.preference_highlighted, true);
if (!animate) {
v.setBackgroundColor(mHighlightColor);
Log.d(TAG, "AddHighlight: Not animation requested - setting highlight background");
requestRemoveHighlightDelayed(v);
return;
}
mFadeInAnimated = true;
final int colorFrom = Color.WHITE;
final int colorTo = mHighlightColor;
final ValueAnimator fadeInLoop = ValueAnimator.ofObject(
new ArgbEvaluator(), colorFrom, colorTo);
fadeInLoop.setDuration(HIGHLIGHT_FADE_IN_DURATION);
fadeInLoop.addUpdateListener(
animator -> v.setBackgroundColor((int) animator.getAnimatedValue()));
fadeInLoop.setRepeatMode(ValueAnimator.REVERSE);
fadeInLoop.setRepeatCount(4);
fadeInLoop.start();
Log.d(TAG, "AddHighlight: starting fade in animation");
requestRemoveHighlightDelayed(v);
}
private void removeHighlightBackground(View v, boolean animate) {
if (!animate) {
v.setTag(R.id.preference_highlighted, false);
v.setBackgroundResource(mNormalBackgroundRes);
Log.d(TAG, "RemoveHighlight: No animation requested - setting normal background");
return;
}
if (!Boolean.TRUE.equals(v.getTag(R.id.preference_highlighted))) {
// Not highlighted, no-op
Log.d(TAG, "RemoveHighlight: Not highlighted - skipping");
return;
}
int colorFrom = mHighlightColor;
int colorTo = Color.WHITE;
v.setTag(R.id.preference_highlighted, false);
final ValueAnimator colorAnimation = ValueAnimator.ofObject(
new ArgbEvaluator(), colorFrom, colorTo);
colorAnimation.setDuration(HIGHLIGHT_FADE_OUT_DURATION);
colorAnimation.addUpdateListener(
animator -> v.setBackgroundColor((int) animator.getAnimatedValue()));
colorAnimation.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
// Animation complete - the background is now white. Change to mNormalBackgroundRes
// so it is white and has ripple on touch.
v.setBackgroundResource(mNormalBackgroundRes);
}
});
colorAnimation.start();
Log.d(TAG, "Starting fade out animation");
}
}
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