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/*
* 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.systemui.statusbar.policy;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.WifiManager;
import android.os.UserHandle;
import android.util.Log;
import com.android.settingslib.TetherUtil;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.ArrayList;
public class HotspotControllerImpl implements HotspotController {
private static final String TAG = "HotspotController";
private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
private static final Intent TETHER_SERVICE_INTENT = new Intent()
.putExtra(TetherUtil.EXTRA_ADD_TETHER_TYPE, TetherUtil.TETHERING_WIFI)
.putExtra(TetherUtil.EXTRA_SET_ALARM, true)
.putExtra(TetherUtil.EXTRA_RUN_PROVISION, true)
.putExtra(TetherUtil.EXTRA_ENABLE_WIFI_TETHER, true)
.setComponent(TetherUtil.TETHER_SERVICE);
private final ArrayList<Callback> mCallbacks = new ArrayList<Callback>();
private final Receiver mReceiver = new Receiver();
private final Context mContext;
private int mHotspotState;
public HotspotControllerImpl(Context context) {
mContext = context;
}
public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
pw.println("HotspotController state:");
pw.print(" mHotspotEnabled="); pw.println(stateToString(mHotspotState));
}
private static String stateToString(int hotspotState) {
switch (hotspotState) {
case WifiManager.WIFI_AP_STATE_DISABLED:
return "DISABLED";
case WifiManager.WIFI_AP_STATE_DISABLING:
return "DISABLING";
case WifiManager.WIFI_AP_STATE_ENABLED:
return "ENABLED";
case WifiManager.WIFI_AP_STATE_ENABLING:
return "ENABLING";
case WifiManager.WIFI_AP_STATE_FAILED:
return "FAILED";
}
return null;
}
public void addCallback(Callback callback) {
if (callback == null || mCallbacks.contains(callback)) return;
if (DEBUG) Log.d(TAG, "addCallback " + callback);
mCallbacks.add(callback);
mReceiver.setListening(!mCallbacks.isEmpty());
}
public void removeCallback(Callback callback) {
if (callback == null) return;
if (DEBUG) Log.d(TAG, "removeCallback " + callback);
mCallbacks.remove(callback);
mReceiver.setListening(!mCallbacks.isEmpty());
}
@Override
public boolean isHotspotEnabled() {
return mHotspotState == WifiManager.WIFI_AP_STATE_ENABLED;
}
@Override
public boolean isHotspotSupported() {
return TetherUtil.isTetheringSupported(mContext);
}
@Override
public void setHotspotEnabled(boolean enabled) {
// Call provisioning app which is called when enabling Tethering from Settings
if (enabled && TetherUtil.isProvisioningNeeded(mContext)) {
mContext.startServiceAsUser(TETHER_SERVICE_INTENT, UserHandle.CURRENT);
} else {
TetherUtil.setWifiTethering(enabled, mContext);
}
}
private void fireCallback(boolean isEnabled) {
for (Callback callback : mCallbacks) {
callback.onHotspotChanged(isEnabled);
}
}
private final class Receiver extends BroadcastReceiver {
private boolean mRegistered;
public void setListening(boolean listening) {
if (listening && !mRegistered) {
if (DEBUG) Log.d(TAG, "Registering receiver");
final IntentFilter filter = new IntentFilter();
filter.addAction(WifiManager.WIFI_AP_STATE_CHANGED_ACTION);
mContext.registerReceiver(this, filter);
mRegistered = true;
} else if (!listening && mRegistered) {
if (DEBUG) Log.d(TAG, "Unregistering receiver");
mContext.unregisterReceiver(this);
mRegistered = false;
}
}
@Override
public void onReceive(Context context, Intent intent) {
if (DEBUG) Log.d(TAG, "onReceive " + intent.getAction());
int state = intent.getIntExtra(
WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_FAILED);
mHotspotState = state;
fireCallback(mHotspotState == WifiManager.WIFI_AP_STATE_ENABLED);
}
}
}
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