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Moonchild
46 lines
1.7 KiB
Java
46 lines
1.7 KiB
Java
/*
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* Copyright (C) 2013 Square, Inc.
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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.squareup.picasso;
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import android.graphics.Bitmap;
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import android.graphics.drawable.Drawable;
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import static com.squareup.picasso.Picasso.LoadedFrom;
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/**
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* Represents an arbitrary listener for image loading.
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* <p/>
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* Objects implementing this class <strong>must</strong> have a working implementation of
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* {@link #equals(Object)} and {@link #hashCode()} for proper storage internally. Instances of this
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* interface will also be compared to determine if view recycling is occurring. It is recommended
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* that you add this interface directly on to a custom view type when using in an adapter to ensure
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* correct recycling behavior.
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*/
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public interface Target {
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/**
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* Callback when an image has been successfully loaded.
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* <p/>
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* <strong>Note:</strong> You must not recycle the bitmap.
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*/
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void onBitmapLoaded(Bitmap bitmap, LoadedFrom from);
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/** Callback indicating the image could not be successfully loaded. */
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void onBitmapFailed(Drawable errorDrawable);
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/** Callback invoked right before your request is submitted. */
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void onPrepareLoad(Drawable placeHolderDrawable);
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}
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