1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*
* Copyright (C) 2012 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.incallui;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.view.ViewPropertyAnimator;
import android.widget.ImageView;
/**
* Utilities for Animation.
*/
public class InCallAnimationUtils {
private static final String LOG_TAG = InCallAnimationUtils.class.getSimpleName();
/**
* Turn on when you're interested in fading animation. Intentionally untied from other debug
* settings.
*/
private static final boolean FADE_DBG = false;
/**
* Duration for animations in msec, which can be used with
* {@link ViewPropertyAnimator#setDuration(long)} for example.
*/
public static final int ANIMATION_DURATION = 250;
private InCallAnimationUtils() {
}
/**
* Drawable achieving cross-fade, just like TransitionDrawable. We can have
* call-backs via animator object (see also {@link CrossFadeDrawable#getAnimator()}).
*/
private static class CrossFadeDrawable extends LayerDrawable {
private final ObjectAnimator mAnimator;
public CrossFadeDrawable(Drawable[] layers) {
super(layers);
mAnimator = ObjectAnimator.ofInt(this, "crossFadeAlpha", 0xff, 0);
}
private int mCrossFadeAlpha;
/**
* This will be used from ObjectAnimator.
* Note: this method is protected by proguard.flags so that it won't be removed
* automatically.
*/
@SuppressWarnings("unused")
public void setCrossFadeAlpha(int alpha) {
mCrossFadeAlpha = alpha;
invalidateSelf();
}
public ObjectAnimator getAnimator() {
return mAnimator;
}
@Override
public void draw(Canvas canvas) {
Drawable first = getDrawable(0);
Drawable second = getDrawable(1);
if (mCrossFadeAlpha > 0) {
first.setAlpha(mCrossFadeAlpha);
first.draw(canvas);
first.setAlpha(255);
}
if (mCrossFadeAlpha < 0xff) {
second.setAlpha(0xff - mCrossFadeAlpha);
second.draw(canvas);
second.setAlpha(0xff);
}
}
}
private static CrossFadeDrawable newCrossFadeDrawable(Drawable first, Drawable second) {
Drawable[] layers = new Drawable[2];
layers[0] = first;
layers[1] = second;
return new CrossFadeDrawable(layers);
}
/**
* Starts cross-fade animation using TransitionDrawable. Nothing will happen if "from" and "to"
* are the same.
*/
public static void startCrossFade(
final ImageView imageView, final Drawable from, final Drawable to) {
// We skip the cross-fade when those two Drawables are equal, or they are BitmapDrawables
// pointing to the same Bitmap.
final boolean drawableIsEqual = (from != null && to != null && from.equals(to));
final boolean hasFromImage = ((from instanceof BitmapDrawable) &&
((BitmapDrawable) from).getBitmap() != null);
final boolean hasToImage = ((to instanceof BitmapDrawable) &&
((BitmapDrawable) to).getBitmap() != null);
final boolean areSameImage = drawableIsEqual || (hasFromImage && hasToImage &&
((BitmapDrawable) from).getBitmap().equals(((BitmapDrawable) to).getBitmap()));
if (!areSameImage) {
if (FADE_DBG) {
log("Start cross-fade animation for " + imageView
+ "(" + Integer.toHexString(from.hashCode()) + " -> "
+ Integer.toHexString(to.hashCode()) + ")");
}
CrossFadeDrawable crossFadeDrawable = newCrossFadeDrawable(from, to);
ObjectAnimator animator = crossFadeDrawable.getAnimator();
imageView.setImageDrawable(crossFadeDrawable);
animator.setDuration(ANIMATION_DURATION);
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
if (FADE_DBG) {
log("cross-fade animation start ("
+ Integer.toHexString(from.hashCode()) + " -> "
+ Integer.toHexString(to.hashCode()) + ")");
}
}
@Override
public void onAnimationEnd(Animator animation) {
if (FADE_DBG) {
log("cross-fade animation ended ("
+ Integer.toHexString(from.hashCode()) + " -> "
+ Integer.toHexString(to.hashCode()) + ")");
}
animation.removeAllListeners();
// Workaround for issue 6300562; this will force the drawable to the
// resultant one regardless of animation glitch.
imageView.setImageDrawable(to);
}
});
animator.start();
/* We could use TransitionDrawable here, but it may cause some weird animation in
* some corner cases. See issue 6300562
* TODO: decide which to be used in the long run. TransitionDrawable is old but system
* one. Ours uses new animation framework and thus have callback (great for testing),
* while no framework support for the exact class.
Drawable[] layers = new Drawable[2];
layers[0] = from;
layers[1] = to;
TransitionDrawable transitionDrawable = new TransitionDrawable(layers);
imageView.setImageDrawable(transitionDrawable);
transitionDrawable.startTransition(ANIMATION_DURATION); */
imageView.setTag(to);
} else if (!hasFromImage && hasToImage) {
imageView.setImageDrawable(to);
imageView.setTag(to);
} else {
if (FADE_DBG) {
log("*Not* start cross-fade. " + imageView);
}
}
}
// Debugging / testing code
private static void log(String msg) {
Log.d(LOG_TAG, msg);
}
}
|
