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
|
/*
* Copyright (C) 2021 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.internal.widget;
import android.annotation.Nullable;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.RemoteViews;
/**
* This view will measure itself as having 0 size if all of its children are {@link #GONE}.
* Otherwise it acts like a normal {@link FrameLayout}.
*/
@RemoteViews.RemoteView
public class NotificationVanishingFrameLayout extends FrameLayout {
public NotificationVanishingFrameLayout(Context context) {
this(context, null, 0, 0);
}
public NotificationVanishingFrameLayout(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0, 0);
}
public NotificationVanishingFrameLayout(Context context, @Nullable AttributeSet attrs,
int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public NotificationVanishingFrameLayout(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if (allChildrenGone()) {
int zeroSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.EXACTLY);
super.onMeasure(zeroSpec, zeroSpec);
} else {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
private boolean allChildrenGone() {
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (child != null && child.getVisibility() != GONE) {
return false;
}
}
return true;
}
}
|
