99 lines
3.6 KiB
Java
99 lines
3.6 KiB
Java
/*
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This file is part of Subsonic.
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Subsonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Subsonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2015 (C) Scott Jackson
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*/
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package net.nullsum.audinaut.view;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.graphics.drawable.TransitionDrawable;
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import android.util.AttributeSet;
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import androidx.appcompat.widget.AppCompatImageView;
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public class RecyclingImageView extends AppCompatImageView {
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private boolean invalidated = false;
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public RecyclingImageView(Context context) {
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super(context);
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}
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public RecyclingImageView(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public RecyclingImageView(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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}
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@Override
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public void onDraw(Canvas canvas) {
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Drawable drawable = this.getDrawable();
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if (drawable != null) {
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if (drawable instanceof BitmapDrawable) {
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if (isBitmapRecycled(drawable)) {
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this.setImageDrawable(null);
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this.invalidated = true;
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}
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} else if (drawable instanceof TransitionDrawable) {
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TransitionDrawable transitionDrawable = (TransitionDrawable) drawable;
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// If last bitmap in chain is recycled, just blank this out since it would be invalid anyways
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Drawable lastDrawable = transitionDrawable.getDrawable(transitionDrawable.getNumberOfLayers() - 1);
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if (isBitmapRecycled(lastDrawable)) {
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this.setImageDrawable(null);
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setInvalidated(true);
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} else {
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// Go through earlier bitmaps and make sure that they are not recycled
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for (int i = 0; i < transitionDrawable.getNumberOfLayers(); i++) {
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Drawable layerDrawable = transitionDrawable.getDrawable(i);
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if (isBitmapRecycled(layerDrawable)) {
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// If anything in the chain is broken, just get rid of transition and go to last drawable
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this.setImageDrawable(lastDrawable);
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break;
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}
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}
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}
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}
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}
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super.onDraw(canvas);
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}
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@Override
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public void setImageDrawable(Drawable drawable) {
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super.setImageDrawable(drawable);
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setInvalidated(false);
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}
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private boolean isBitmapRecycled(Drawable drawable) {
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if (!(drawable instanceof BitmapDrawable)) {
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return false;
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}
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BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
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return bitmapDrawable.getBitmap() != null && bitmapDrawable.getBitmap().isRecycled();
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}
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public boolean isInvalidated() {
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return invalidated;
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}
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private void setInvalidated(boolean invalidated) {
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this.invalidated = invalidated;
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}
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}
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