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
185
186
187
188
189
190
191
|
/*
* Copyright (C) 2014 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.setupwizard.navigationbar;
import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.ContextThemeWrapper;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.ViewTreeObserver.OnPreDrawListener;
import android.widget.Button;
/**
* Fragment class for controlling the custom navigation bar shown during setup wizard. Apps in the
* Android tree can use this by including the common.mk makefile. Apps outside of the tree can
* create a library project out of the source.
*/
public class SetupWizardNavBar extends Fragment implements OnPreDrawListener, OnClickListener {
private static final String TAG = "SetupWizardNavBar";
private static final int IMMERSIVE_FLAGS =
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
private int mSystemUiFlags = IMMERSIVE_FLAGS | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
private ViewGroup mNavigationBarView;
private Button mNextButton;
private Button mBackButton;
private NavigationBarListener mCallback;
public interface NavigationBarListener {
public void onNavigationBarCreated(SetupWizardNavBar bar);
public void onNavigateBack();
public void onNavigateNext();
}
public SetupWizardNavBar() {
// no-arg constructor for fragments
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
mCallback = (NavigationBarListener) activity;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Context context = new ContextThemeWrapper(getActivity(), getNavbarTheme());
inflater = LayoutInflater.from(context);
mNavigationBarView = (ViewGroup) inflater.inflate(R.layout.setup_wizard_navbar_layout,
container, false);
mNextButton = (Button) mNavigationBarView.findViewById(R.id.setup_wizard_navbar_next);
mBackButton = (Button) mNavigationBarView.findViewById(R.id.setup_wizard_navbar_back);
mNextButton.setOnClickListener(this);
mBackButton.setOnClickListener(this);
return mNavigationBarView;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mCallback.onNavigationBarCreated(this);
mNavigationBarView.setSystemUiVisibility(mSystemUiFlags);
// Set the UI flags before draw because the visibility might change in unexpected /
// undetectable times, like transitioning from a finishing activity that had a keyboard
ViewTreeObserver viewTreeObserver = mNavigationBarView.getViewTreeObserver();
viewTreeObserver.addOnPreDrawListener(this);
}
@Override
public boolean onPreDraw() {
// View.setSystemUiVisibility checks if the visibility changes before applying them
// so the performance impact is contained
mNavigationBarView.setSystemUiVisibility(mSystemUiFlags);
return true;
}
/**
* Sets whether system navigation bar should be hidden.
* @param useImmersiveMode True to activate immersive mode and hide the system navigation bar
*/
public void setUseImmersiveMode(boolean useImmersiveMode) {
// By default, enable layoutHideNavigation if immersive mode is used
setUseImmersiveMode(useImmersiveMode, useImmersiveMode);
}
public void setUseImmersiveMode(boolean useImmersiveMode, boolean layoutHideNavigation) {
if (useImmersiveMode) {
mSystemUiFlags |= IMMERSIVE_FLAGS;
if (layoutHideNavigation) {
mSystemUiFlags |= View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
}
} else {
mSystemUiFlags &= ~(IMMERSIVE_FLAGS | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
}
mNavigationBarView.setSystemUiVisibility(mSystemUiFlags);
}
private int getNavbarTheme() {
// Normally we can automatically guess the theme by comparing the foreground color against
// the background color. But we also allow specifying explicitly using
// setup_wizard_navbar_theme.
TypedArray attributes = getActivity().obtainStyledAttributes(
new int[] {
R.attr.setup_wizard_navbar_theme,
android.R.attr.colorForeground,
android.R.attr.colorBackground });
int theme = attributes.getResourceId(0, 0);
if (theme == 0) {
// Compare the value of the foreground against the background color to see if current
// theme is light-on-dark or dark-on-light.
float[] foregroundHsv = new float[3];
float[] backgroundHsv = new float[3];
Color.colorToHSV(attributes.getColor(1, 0), foregroundHsv);
Color.colorToHSV(attributes.getColor(2, 0), backgroundHsv);
boolean isDarkBg = foregroundHsv[2] > backgroundHsv[2];
theme = isDarkBg ? R.style.setup_wizard_navbar_theme_dark :
R.style.setup_wizard_navbar_theme_light;
}
attributes.recycle();
return theme;
}
@Override
public void onClick(View v) {
if (v == mBackButton) {
mCallback.onNavigateBack();
} else if (v == mNextButton) {
mCallback.onNavigateNext();
}
}
public Button getBackButton() {
return mBackButton;
}
public Button getNextButton() {
return mNextButton;
}
public static class NavButton extends Button {
public NavButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
public NavButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public NavButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public NavButton(Context context) {
super(context);
}
@Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
// The color of the button is #de000000 / #deffffff when enabled. When disabled, apply
// additional 23% alpha, so the overall opacity is 20%.
setAlpha(enabled ? 1.0f : 0.23f);
}
}
}
|
