AppCompatImageHelper.java revision 8c3f75732bc35cf683f9014816b26c77d9c8f4e8 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.support.v7.widget;
18
19import android.graphics.drawable.Drawable;
20import android.os.Build;
21import android.support.v4.content.ContextCompat;
22import android.support.v7.appcompat.R;
23import android.util.AttributeSet;
24import android.widget.ImageView;
25
26/**
27 * @hide
28 */
29public class AppCompatImageHelper {
30
31    private final ImageView mView;
32    private final AppCompatDrawableManager mDrawableManager;
33
34    public AppCompatImageHelper(ImageView view, AppCompatDrawableManager drawableManager) {
35        mView = view;
36        mDrawableManager = drawableManager;
37    }
38
39    public void loadFromAttributes(AttributeSet attrs, int defStyleAttr) {
40        TintTypedArray a = TintTypedArray.obtainStyledAttributes(mView.getContext(), attrs,
41                R.styleable.AppCompatImageView, defStyleAttr, 0);
42        try {
43            Drawable d = a.getDrawableIfKnown(R.styleable.AppCompatImageView_android_src);
44            if (d != null) {
45                mView.setImageDrawable(d);
46            }
47
48            final int id = a.getResourceId(R.styleable.AppCompatImageView_srcCompat, -1);
49            if (id != -1) {
50                d = mDrawableManager.getDrawable(mView.getContext(), id);
51                if (d != null) {
52                    mView.setImageDrawable(d);
53                }
54            }
55
56            final Drawable drawable = mView.getDrawable();
57            if (drawable != null) {
58                DrawableUtils.fixDrawable(drawable);
59            }
60        } finally {
61            a.recycle();
62        }
63    }
64
65    public void setImageResource(int resId) {
66        if (resId != 0) {
67            final Drawable d = mDrawableManager != null
68                    ? mDrawableManager.getDrawable(mView.getContext(), resId)
69                    : ContextCompat.getDrawable(mView.getContext(), resId);
70            if (d != null) {
71                DrawableUtils.fixDrawable(d);
72            }
73            mView.setImageDrawable(d);
74        } else {
75            mView.setImageDrawable(null);
76        }
77    }
78
79    boolean hasOverlappingRendering() {
80        final Drawable background = mView.getBackground();
81        if (Build.VERSION.SDK_INT >= 21
82                && background instanceof android.graphics.drawable.RippleDrawable) {
83            // RippleDrawable has an issue on L+ when used with an alpha animation.
84            // This workaround should be disabled when the platform bug is fixed. See b/27715789
85            return false;
86        }
87        return true;
88    }
89}
90