| /* |
| * Copyright (C) 2013 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.bitmap.view; |
| |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.drawable.Drawable; |
| import android.net.Uri; |
| import android.os.Build; |
| import android.util.AttributeSet; |
| import android.widget.ImageView; |
| |
| import com.android.bitmap.drawable.BasicBitmapDrawable; |
| |
| /** |
| * A helpful ImageView replacement that can generally be used in lieu of ImageView. |
| * BitmapDrawableImageView has logic to unbind its BasicBitmapDrawable when it is detached from the |
| * window. |
| * |
| * If you are using this with RecyclerView, |
| * or any use-case where {@link android.view.View#onDetachedFromWindow} is |
| * not a good signal for unbind, |
| * makes sure you {@link #setShouldUnbindOnDetachFromWindow} to false. |
| */ |
| public class BitmapDrawableImageView extends ImageView { |
| private static final boolean HAS_TRANSIENT_STATE_SUPPORTED = |
| Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN; |
| private static final boolean TEMPORARY = true; |
| private static final boolean PERMANENT = !TEMPORARY; |
| |
| private BasicBitmapDrawable mDrawable; |
| private boolean mShouldUnbindOnDetachFromWindow = true; |
| private boolean mAttachedToWindow; |
| |
| public BitmapDrawableImageView(final Context context) { |
| this(context, null); |
| } |
| |
| public BitmapDrawableImageView(final Context context, final AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public BitmapDrawableImageView(final Context context, final AttributeSet attrs, |
| final int defStyle) { |
| super(context, attrs, defStyle); |
| } |
| |
| public boolean shouldUnbindOnDetachFromWindow() { |
| return mShouldUnbindOnDetachFromWindow; |
| } |
| |
| public void setShouldUnbindOnDetachFromWindow(boolean shouldUnbindOnDetachFromWindow) { |
| mShouldUnbindOnDetachFromWindow = shouldUnbindOnDetachFromWindow; |
| } |
| |
| /** |
| * Get the source drawable for this BitmapDrawableImageView. |
| * @return The source drawable casted to the given type, or null if the type does not match. |
| */ |
| @SuppressWarnings("unchecked") // Cast to type parameter. |
| public <E extends BasicBitmapDrawable> E getTypedDrawable() { |
| try { |
| return (E) mDrawable; |
| } catch (Exception ignored) { |
| return null; |
| } |
| } |
| |
| /** |
| * Set the given drawable as the source for this BitmapDrawableImageView. |
| * @param drawable The source drawable. |
| */ |
| public <E extends BasicBitmapDrawable> void setTypedDrawable(E drawable) { |
| super.setImageDrawable(drawable); |
| if (drawable != mDrawable) { |
| unbindDrawable(); |
| } |
| mDrawable = drawable; |
| } |
| |
| public void unbindDrawable() { |
| unbindDrawable(PERMANENT); |
| } |
| |
| private void unbindDrawable(boolean temporary) { |
| if (mDrawable != null) { |
| mDrawable.unbind(temporary); |
| } |
| } |
| |
| @Override |
| public void setImageResource(final int resId) { |
| super.setImageResource(resId); |
| unbindDrawable(); |
| mDrawable = null; |
| } |
| |
| @Override |
| public void setImageURI(final Uri uri) { |
| super.setImageURI(uri); |
| unbindDrawable(); |
| mDrawable = null; |
| } |
| |
| @Override |
| public void setImageDrawable(final Drawable drawable) { |
| super.setImageDrawable(drawable); |
| unbindDrawable(); |
| mDrawable = null; |
| } |
| |
| @Override |
| public void setImageBitmap(final Bitmap bm) { |
| super.setImageBitmap(bm); |
| unbindDrawable(); |
| mDrawable = null; |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| mAttachedToWindow = true; |
| if (mDrawable != null && mDrawable.getKey() == null |
| && mDrawable.getPreviousKey() != null && mShouldUnbindOnDetachFromWindow) { |
| mDrawable.bind(mDrawable.getPreviousKey()); |
| } |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| mAttachedToWindow = false; |
| if (HAS_TRANSIENT_STATE_SUPPORTED && !hasTransientState() |
| && mShouldUnbindOnDetachFromWindow) { |
| unbindDrawable(TEMPORARY); |
| } |
| } |
| |
| @Override |
| public void setHasTransientState(boolean hasTransientState) { |
| super.setHasTransientState(hasTransientState); |
| if (!hasTransientState && !mAttachedToWindow && mShouldUnbindOnDetachFromWindow) { |
| unbindDrawable(TEMPORARY); |
| } |
| } |
| |
| @Override |
| public void onRtlPropertiesChanged(int layoutDirection) { |
| super.onRtlPropertiesChanged(layoutDirection); |
| if (mDrawable != null) { |
| mDrawable.setLayoutDirectionLocal(layoutDirection); |
| } |
| } |
| } |