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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/*
* Copyright (C) 2010 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.settings.bluetooth;
import android.bluetooth.BluetoothAdapter;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.UserManager;
import android.provider.Settings;
import android.widget.Toast;
import com.android.internal.annotations.VisibleForTesting;
import com.android.settings.R;
import com.android.settings.widget.SwitchWidgetController;
import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
import com.android.settingslib.WirelessUtils;
import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
import com.android.settingslib.bluetooth.LocalBluetoothManager;
import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
/**
* BluetoothEnabler is a helper to manage the Bluetooth on/off checkbox
* preference. It turns on/off Bluetooth and ensures the summary of the
* preference reflects the current state.
*/
public final class BluetoothEnabler implements SwitchWidgetController.OnSwitchChangeListener {
private final SwitchWidgetController mSwitchController;
private final MetricsFeatureProvider mMetricsFeatureProvider;
private Context mContext;
private boolean mValidListener;
private final LocalBluetoothAdapter mLocalAdapter;
private final IntentFilter mIntentFilter;
private final RestrictionUtils mRestrictionUtils;
private SwitchWidgetController.OnSwitchChangeListener mCallback;
private static final String EVENT_DATA_IS_BT_ON = "is_bluetooth_on";
private static final int EVENT_UPDATE_INDEX = 0;
private final int mMetricsEvent;
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Broadcast receiver is always running on the UI thread here,
// so we don't need consider thread synchronization.
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
handleStateChanged(state);
}
};
public BluetoothEnabler(Context context, SwitchWidgetController switchController,
MetricsFeatureProvider metricsFeatureProvider, LocalBluetoothManager manager,
int metricsEvent) {
this(context, switchController, metricsFeatureProvider, manager, metricsEvent,
new RestrictionUtils());
}
public BluetoothEnabler(Context context, SwitchWidgetController switchController,
MetricsFeatureProvider metricsFeatureProvider, LocalBluetoothManager manager,
int metricsEvent, RestrictionUtils restrictionUtils) {
mContext = context;
mMetricsFeatureProvider = metricsFeatureProvider;
mSwitchController = switchController;
mSwitchController.setListener(this);
mValidListener = false;
mMetricsEvent = metricsEvent;
if (manager == null) {
// Bluetooth is not supported
mLocalAdapter = null;
mSwitchController.setEnabled(false);
} else {
mLocalAdapter = manager.getBluetoothAdapter();
}
mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
mRestrictionUtils = restrictionUtils;
}
public void setupSwitchController() {
mSwitchController.setupView();
}
public void teardownSwitchController() {
mSwitchController.teardownView();
}
public void resume(Context context) {
if (mContext != context) {
mContext = context;
}
final boolean restricted = maybeEnforceRestrictions();
if (mLocalAdapter == null) {
mSwitchController.setEnabled(false);
return;
}
// Bluetooth state is not sticky, so set it manually
if (!restricted) {
handleStateChanged(mLocalAdapter.getBluetoothState());
}
mSwitchController.startListening();
mContext.registerReceiver(mReceiver, mIntentFilter);
mValidListener = true;
}
public void pause() {
if (mLocalAdapter == null) {
return;
}
if (mValidListener) {
mSwitchController.stopListening();
mContext.unregisterReceiver(mReceiver);
mValidListener = false;
}
}
void handleStateChanged(int state) {
switch (state) {
case BluetoothAdapter.STATE_TURNING_ON:
mSwitchController.setEnabled(false);
break;
case BluetoothAdapter.STATE_ON:
setChecked(true);
mSwitchController.setEnabled(true);
break;
case BluetoothAdapter.STATE_TURNING_OFF:
mSwitchController.setEnabled(false);
break;
case BluetoothAdapter.STATE_OFF:
setChecked(false);
mSwitchController.setEnabled(true);
break;
default:
setChecked(false);
mSwitchController.setEnabled(true);
}
}
private void setChecked(boolean isChecked) {
if (isChecked != mSwitchController.isChecked()) {
// set listener to null, so onCheckedChanged won't be called
// if the checked status on Switch isn't changed by user click
if (mValidListener) {
mSwitchController.stopListening();
}
mSwitchController.setChecked(isChecked);
if (mValidListener) {
mSwitchController.startListening();
}
}
}
@Override
public boolean onSwitchToggled(boolean isChecked) {
if (maybeEnforceRestrictions()) {
triggerParentPreferenceCallback(isChecked);
return true;
}
// Show toast message if Bluetooth is not allowed in airplane mode
if (isChecked &&
!WirelessUtils.isRadioAllowed(mContext, Settings.Global.RADIO_BLUETOOTH)) {
Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show();
// Reset switch to off
mSwitchController.setChecked(false);
triggerParentPreferenceCallback(false);
return false;
}
mMetricsFeatureProvider.action(mContext, mMetricsEvent, isChecked);
if (mLocalAdapter != null) {
boolean status = mLocalAdapter.setBluetoothEnabled(isChecked);
// If we cannot toggle it ON then reset the UI assets:
// a) The switch should be OFF but it should still be togglable (enabled = True)
// b) The switch bar should have OFF text.
if (isChecked && !status) {
mSwitchController.setChecked(false);
mSwitchController.setEnabled(true);
mSwitchController.updateTitle(false);
triggerParentPreferenceCallback(false);
return false;
}
}
mSwitchController.setEnabled(false);
triggerParentPreferenceCallback(isChecked);
return true;
}
/**
* Sets a callback back that this enabler will trigger in case the preference using the enabler
* still needed the callback on the SwitchController (which we now use).
* @param listener The listener with a callback to trigger.
*/
public void setToggleCallback(SwitchWidgetController.OnSwitchChangeListener listener) {
mCallback = listener;
}
/**
* Enforces user restrictions disallowing Bluetooth (or its configuration) if there are any.
*
* @return if there was any user restriction to enforce.
*/
@VisibleForTesting
boolean maybeEnforceRestrictions() {
EnforcedAdmin admin = getEnforcedAdmin(mRestrictionUtils, mContext);
mSwitchController.setDisabledByAdmin(admin);
if (admin != null) {
mSwitchController.setChecked(false);
mSwitchController.setEnabled(false);
}
return admin != null;
}
public static EnforcedAdmin getEnforcedAdmin(RestrictionUtils mRestrictionUtils,
Context mContext) {
EnforcedAdmin admin = mRestrictionUtils.checkIfRestrictionEnforced(
mContext, UserManager.DISALLOW_BLUETOOTH);
if (admin == null) {
admin = mRestrictionUtils.checkIfRestrictionEnforced(
mContext, UserManager.DISALLOW_CONFIG_BLUETOOTH);
}
return admin;
}
// This triggers the callback which was manually set for this enabler since the enabler will
// take over the switch controller callback
private void triggerParentPreferenceCallback(boolean isChecked) {
if (mCallback != null) {
mCallback.onSwitchToggled(isChecked);
}
}
}
|
