AppCompatImageHelper.java revision 8e10080c914d1ad0784394fa3026b85535535847 
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 static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP;
20
21import android.graphics.drawable.Drawable;
22import android.os.Build;
23import android.support.annotation.RestrictTo;
24import android.support.v7.appcompat.R;
25import android.support.v7.content.res.AppCompatResources;
26import android.util.AttributeSet;
27import android.widget.ImageView;
28
29/**
30 * @hide
31 */
32@RestrictTo(LIBRARY_GROUP)
33public class AppCompatImageHelper {
34
35    private final ImageView mView;
36
37    public AppCompatImageHelper(ImageView view) {
38        mView = view;
39    }
40
41    public void loadFromAttributes(AttributeSet attrs, int defStyleAttr) {
42        TintTypedArray a = null;
43        try {
44            Drawable drawable = mView.getDrawable();
45
46            if (drawable == null) {
47                a = TintTypedArray.obtainStyledAttributes(mView.getContext(), attrs,
48                        R.styleable.AppCompatImageView, defStyleAttr, 0);
49
50                // If the view doesn't already have a drawable (from android:src), try loading
51                // it from srcCompat
52                final int id = a.getResourceId(R.styleable.AppCompatImageView_srcCompat, -1);
53                if (id != -1) {
54                    drawable = AppCompatResources.getDrawable(mView.getContext(), id);
55                    if (drawable != null) {
56                        mView.setImageDrawable(drawable);
57                    }
58                }
59            }
60
61            if (drawable != null) {
62                DrawableUtils.fixDrawable(drawable);
63            }
64        } finally {
65            if (a != null) {
66                a.recycle();
67            }
68        }
69    }
70
71    public void setImageResource(int resId) {
72        if (resId != 0) {
73            final Drawable d = AppCompatResources.getDrawable(mView.getContext(), resId);
74            if (d != null) {
75                DrawableUtils.fixDrawable(d);
76            }
77            mView.setImageDrawable(d);
78        } else {
79            mView.setImageDrawable(null);
80        }
81    }
82
83    boolean hasOverlappingRendering() {
84        final Drawable background = mView.getBackground();
85        if (Build.VERSION.SDK_INT >= 21
86                && background instanceof android.graphics.drawable.RippleDrawable) {
87            // RippleDrawable has an issue on L+ when used with an alpha animation.
88            // This workaround should be disabled when the platform bug is fixed. See b/27715789
89            return false;
90        }
91        return true;
92    }
93}
94