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November 24, 2011 16:05
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Network scan
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/* | |
* Copyright (C) 2008 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.phone; | |
import android.app.Service; | |
import android.content.Intent; | |
import com.android.internal.telephony.gsm.NetworkInfo; | |
import android.os.AsyncResult; | |
import android.os.Binder; | |
import android.os.Handler; | |
import android.os.IBinder; | |
import android.os.Message; | |
import android.os.RemoteCallbackList; | |
import android.os.RemoteException; | |
import com.android.internal.telephony.Phone; | |
import com.android.internal.telephony.PhoneFactory; | |
import android.util.Log; | |
import java.util.ArrayList; | |
/** | |
* Service code used to assist in querying the network for service | |
* availability. | |
*/ | |
public class NetworkQueryService extends Service { | |
// debug data | |
private static final String LOG_TAG = "NetworkQuery"; | |
private static final boolean DBG = false; | |
// static events | |
private static final int EVENT_NETWORK_SCAN_COMPLETED = 100; | |
// static states indicating the query status of the service | |
private static final int QUERY_READY = -1; | |
private static final int QUERY_IS_RUNNING = -2; | |
// error statuses that will be retured in the callback. | |
public static final int QUERY_OK = 0; | |
public static final int QUERY_EXCEPTION = 1; | |
/** state of the query service */ | |
private int mState; | |
/** local handle to the phone object */ | |
private Phone mPhone; | |
/** | |
* Class for clients to access. Because we know this service always | |
* runs in the same process as its clients, we don't need to deal with | |
* IPC. | |
*/ | |
public class LocalBinder extends Binder { | |
INetworkQueryService getService() { | |
return mBinder; | |
} | |
} | |
private final IBinder mLocalBinder = new LocalBinder(); | |
/** | |
* Local handler to receive the network query compete callback | |
* from the RIL. | |
*/ | |
Handler mHandler = new Handler() { | |
@Override | |
public void handleMessage(Message msg) { | |
switch (msg.what) { | |
// if the scan is complete, broadcast the results. | |
// to all registerd callbacks. | |
case EVENT_NETWORK_SCAN_COMPLETED: | |
if (DBG) log("scan completed, broadcasting results"); | |
broadcastQueryResults((AsyncResult) msg.obj); | |
break; | |
} | |
} | |
}; | |
/** | |
* List of callback objects, also used to synchronize access to | |
* itself and to changes in state. | |
*/ | |
final RemoteCallbackList<INetworkQueryServiceCallback> mCallbacks = | |
new RemoteCallbackList<INetworkQueryServiceCallback> (); | |
/** | |
* Implementation of the INetworkQueryService interface. | |
*/ | |
private final INetworkQueryService.Stub mBinder = new INetworkQueryService.Stub() { | |
/** | |
* Starts a query with a INetworkQueryServiceCallback object if | |
* one has not been started yet. Ignore the new query request | |
* if the query has been started already. Either way, place the | |
* callback object in the queue to be notified upon request | |
* completion. | |
*/ | |
public void startNetworkQuery(INetworkQueryServiceCallback cb) { | |
if (cb != null) { | |
// register the callback to the list of callbacks. | |
synchronized (mCallbacks) { | |
mCallbacks.register(cb); | |
if (DBG) log("registering callback " + cb.getClass().toString()); | |
switch (mState) { | |
case QUERY_READY: | |
// TODO: we may want to install a timeout here in case we | |
// do not get a timely response from the RIL. | |
mPhone.getAvailableNetworks( | |
mHandler.obtainMessage(EVENT_NETWORK_SCAN_COMPLETED)); | |
mState = QUERY_IS_RUNNING; | |
if (DBG) log("starting new query"); | |
break; | |
// do nothing if we're currently busy. | |
case QUERY_IS_RUNNING: | |
if (DBG) log("query already in progress"); | |
break; | |
default: | |
} | |
} | |
} | |
} | |
/** | |
* Stops a query with a INetworkQueryServiceCallback object as | |
* a token. | |
*/ | |
public void stopNetworkQuery(INetworkQueryServiceCallback cb) { | |
// currently we just unregister the callback, since there is | |
// no way to tell the RIL to terminate the query request. | |
// This means that the RIL may still be busy after the stop | |
// request was made, but the state tracking logic ensures | |
// that the delay will only last for 1 request even with | |
// repeated button presses in the NetworkSetting activity. | |
if (cb != null) { | |
synchronized (mCallbacks) { | |
if (DBG) log("unregistering callback " + cb.getClass().toString()); | |
mCallbacks.unregister(cb); | |
} | |
} | |
} | |
}; | |
@Override | |
public void onCreate() { | |
mState = QUERY_READY; | |
mPhone = PhoneFactory.getDefaultPhone(); | |
} | |
/** | |
* Required for service implementation. | |
*/ | |
@Override | |
public void onStart(Intent intent, int startId) { | |
} | |
/** | |
* Handle the bind request. | |
*/ | |
@Override | |
public IBinder onBind(Intent intent) { | |
// TODO: Currently, return only the LocalBinder instance. If we | |
// end up requiring support for a remote binder, we will need to | |
// return mBinder as well, depending upon the intent. | |
if (DBG) log("binding service implementation"); | |
return mLocalBinder; | |
} | |
/** | |
* Broadcast the results from the query to all registered callback | |
* objects. | |
*/ | |
private void broadcastQueryResults (AsyncResult ar) { | |
// reset the state. | |
synchronized (mCallbacks) { | |
mState = QUERY_READY; | |
// see if we need to do any work. | |
if (ar == null) { | |
if (DBG) log("AsyncResult is null."); | |
return; | |
} | |
// TODO: we may need greater accuracy here, but for now, just a | |
// simple status integer will suffice. | |
int exception = (ar.exception == null) ? QUERY_OK : QUERY_EXCEPTION; | |
if (DBG) log("AsyncResult has exception " + exception); | |
// Make the calls to all the registered callbacks. | |
for (int i = (mCallbacks.beginBroadcast() - 1); i >= 0; i--) { | |
INetworkQueryServiceCallback cb = mCallbacks.getBroadcastItem(i); | |
if (DBG) log("broadcasting results to " + cb.getClass().toString()); | |
try { | |
cb.onQueryComplete((ArrayList<NetworkInfo>) ar.result, exception); | |
} catch (RemoteException e) { | |
} | |
} | |
// finish up. | |
mCallbacks.finishBroadcast(); | |
} | |
} | |
private static void log(String msg) { | |
Log.d(LOG_TAG, msg); | |
} | |
} |
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/* | |
* Copyright (C) 2006 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.phone; | |
import android.app.Dialog; | |
import android.app.ProgressDialog; | |
import android.content.ComponentName; | |
import android.content.Context; | |
import android.content.DialogInterface; | |
import android.content.Intent; | |
import android.content.ServiceConnection; | |
import android.os.AsyncResult; | |
import android.os.Bundle; | |
import android.os.Handler; | |
import android.os.IBinder; | |
import android.os.Message; | |
import android.os.RemoteException; | |
import android.preference.Preference; | |
import android.preference.PreferenceActivity; | |
import android.preference.PreferenceGroup; | |
import android.preference.PreferenceScreen; | |
import android.util.Log; | |
import com.android.internal.telephony.CommandException; | |
import com.android.internal.telephony.Phone; | |
import com.android.internal.telephony.gsm.NetworkInfo; | |
import java.util.HashMap; | |
import java.util.List; | |
/** | |
* "Networks" settings UI for the Phone app. | |
*/ | |
public class NetworkSetting extends PreferenceActivity | |
implements DialogInterface.OnCancelListener { | |
private static final String LOG_TAG = "phone"; | |
private static final boolean DBG = false; | |
private static final int EVENT_NETWORK_SCAN_COMPLETED = 100; | |
private static final int EVENT_NETWORK_SELECTION_DONE = 200; | |
private static final int EVENT_AUTO_SELECT_DONE = 300; | |
//dialog ids | |
private static final int DIALOG_NETWORK_SELECTION = 100; | |
private static final int DIALOG_NETWORK_LIST_LOAD = 200; | |
private static final int DIALOG_NETWORK_AUTO_SELECT = 300; | |
//String keys for preference lookup | |
private static final String LIST_NETWORKS_KEY = "list_networks_key"; | |
private static final String BUTTON_SRCH_NETWRKS_KEY = "button_srch_netwrks_key"; | |
private static final String BUTTON_AUTO_SELECT_KEY = "button_auto_select_key"; | |
//map of network controls to the network data. | |
private HashMap<Preference, NetworkInfo> mNetworkMap; | |
Phone mPhone; | |
protected boolean mIsForeground = false; | |
/** message for network selection */ | |
String mNetworkSelectMsg; | |
//preference objects | |
private PreferenceGroup mNetworkList; | |
private Preference mSearchButton; | |
private Preference mAutoSelect; | |
private final Handler mHandler = new Handler() { | |
@Override | |
public void handleMessage(Message msg) { | |
AsyncResult ar; | |
switch (msg.what) { | |
case EVENT_NETWORK_SCAN_COMPLETED: | |
networksListLoaded ((List<NetworkInfo>) msg.obj, msg.arg1); | |
break; | |
case EVENT_NETWORK_SELECTION_DONE: | |
if (DBG) log("hideProgressPanel"); | |
removeDialog(DIALOG_NETWORK_SELECTION); | |
getPreferenceScreen().setEnabled(true); | |
ar = (AsyncResult) msg.obj; | |
if (ar.exception != null) { | |
if (DBG) log("manual network selection: failed!"); | |
displayNetworkSelectionFailed(ar.exception); | |
} else { | |
if (DBG) log("manual network selection: succeeded!"); | |
displayNetworkSelectionSucceeded(); | |
} | |
break; | |
case EVENT_AUTO_SELECT_DONE: | |
if (DBG) log("hideProgressPanel"); | |
if (mIsForeground) { | |
dismissDialog(DIALOG_NETWORK_AUTO_SELECT); | |
} | |
getPreferenceScreen().setEnabled(true); | |
ar = (AsyncResult) msg.obj; | |
if (ar.exception != null) { | |
if (DBG) log("automatic network selection: failed!"); | |
displayNetworkSelectionFailed(ar.exception); | |
} else { | |
if (DBG) log("automatic network selection: succeeded!"); | |
displayNetworkSelectionSucceeded(); | |
} | |
break; | |
} | |
return; | |
} | |
}; | |
/** | |
* Service connection code for the NetworkQueryService. | |
* Handles the work of binding to a local object so that we can make | |
* the appropriate service calls. | |
*/ | |
/** Local service interface */ | |
private INetworkQueryService mNetworkQueryService = null; | |
/** Service connection */ | |
private final ServiceConnection mNetworkQueryServiceConnection = new ServiceConnection() { | |
/** Handle the task of binding the local object to the service */ | |
public void onServiceConnected(ComponentName className, IBinder service) { | |
if (DBG) log("connection created, binding local service."); | |
mNetworkQueryService = ((NetworkQueryService.LocalBinder) service).getService(); | |
// as soon as it is bound, run a query. | |
loadNetworksList(); | |
} | |
/** Handle the task of cleaning up the local binding */ | |
public void onServiceDisconnected(ComponentName className) { | |
if (DBG) log("connection disconnected, cleaning local binding."); | |
mNetworkQueryService = null; | |
} | |
}; | |
/** | |
* This implementation of INetworkQueryServiceCallback is used to receive | |
* callback notifications from the network query service. | |
*/ | |
private final INetworkQueryServiceCallback mCallback = new INetworkQueryServiceCallback.Stub() { | |
/** place the message on the looper queue upon query completion. */ | |
public void onQueryComplete(List<NetworkInfo> networkInfoArray, int status) { | |
if (DBG) log("notifying message loop of query completion."); | |
Message msg = mHandler.obtainMessage(EVENT_NETWORK_SCAN_COMPLETED, | |
status, 0, networkInfoArray); | |
msg.sendToTarget(); | |
} | |
}; | |
@Override | |
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { | |
boolean handled = false; | |
if (preference == mSearchButton) { | |
loadNetworksList(); | |
handled = true; | |
} else if (preference == mAutoSelect) { | |
selectNetworkAutomatic(); | |
handled = true; | |
} else { | |
Preference selectedCarrier = preference; | |
String networkStr = selectedCarrier.getTitle().toString(); | |
if (DBG) log("selected network: " + networkStr); | |
Message msg = mHandler.obtainMessage(EVENT_NETWORK_SELECTION_DONE); | |
mPhone.selectNetworkManually(mNetworkMap.get(selectedCarrier), msg); | |
displayNetworkSeletionInProgress(networkStr); | |
handled = true; | |
} | |
return handled; | |
} | |
//implemented for DialogInterface.OnCancelListener | |
public void onCancel(DialogInterface dialog) { | |
// request that the service stop the query with this callback object. | |
try { | |
mNetworkQueryService.stopNetworkQuery(mCallback); | |
} catch (RemoteException e) { | |
throw new RuntimeException(e); | |
} | |
finish(); | |
} | |
public String getNormalizedCarrierName(NetworkInfo ni) { | |
if (ni != null) { | |
return ni.getOperatorAlphaLong() + " (" + ni.getOperatorNumeric() + ")"; | |
} | |
return null; | |
} | |
@Override | |
protected void onCreate(Bundle icicle) { | |
super.onCreate(icicle); | |
addPreferencesFromResource(R.xml.carrier_select); | |
mPhone = PhoneApp.getInstance().phone; | |
mNetworkList = (PreferenceGroup) getPreferenceScreen().findPreference(LIST_NETWORKS_KEY); | |
mNetworkMap = new HashMap<Preference, NetworkInfo>(); | |
mSearchButton = getPreferenceScreen().findPreference(BUTTON_SRCH_NETWRKS_KEY); | |
mAutoSelect = getPreferenceScreen().findPreference(BUTTON_AUTO_SELECT_KEY); | |
// Start the Network Query service, and bind it. | |
// The OS knows to start he service only once and keep the instance around (so | |
// long as startService is called) until a stopservice request is made. Since | |
// we want this service to just stay in the background until it is killed, we | |
// don't bother stopping it from our end. | |
startService (new Intent(this, NetworkQueryService.class)); | |
bindService (new Intent(this, NetworkQueryService.class), mNetworkQueryServiceConnection, | |
Context.BIND_AUTO_CREATE); | |
} | |
@Override | |
public void onResume() { | |
super.onResume(); | |
mIsForeground = true; | |
} | |
@Override | |
public void onPause() { | |
super.onPause(); | |
mIsForeground = false; | |
} | |
/** | |
* Override onDestroy() to unbind the query service, avoiding service | |
* leak exceptions. | |
*/ | |
@Override | |
protected void onDestroy() { | |
// unbind the service. | |
unbindService(mNetworkQueryServiceConnection); | |
super.onDestroy(); | |
} | |
@Override | |
protected Dialog onCreateDialog(int id) { | |
if ((id == DIALOG_NETWORK_SELECTION) || (id == DIALOG_NETWORK_LIST_LOAD) || | |
(id == DIALOG_NETWORK_AUTO_SELECT)) { | |
ProgressDialog dialog = new ProgressDialog(this); | |
switch (id) { | |
case DIALOG_NETWORK_SELECTION: | |
// It would be more efficient to reuse this dialog by moving | |
// this setMessage() into onPreparedDialog() and NOT use | |
// removeDialog(). However, this is not possible since the | |
// message is rendered only 2 times in the ProgressDialog - | |
// after show() and before onCreate. | |
dialog.setMessage(mNetworkSelectMsg); | |
dialog.setCancelable(false); | |
dialog.setIndeterminate(true); | |
break; | |
case DIALOG_NETWORK_AUTO_SELECT: | |
dialog.setMessage(getResources().getString(R.string.register_automatically)); | |
dialog.setCancelable(false); | |
dialog.setIndeterminate(true); | |
break; | |
case DIALOG_NETWORK_LIST_LOAD: | |
default: | |
// reinstate the cancelablity of the dialog. | |
dialog.setMessage(getResources().getString(R.string.load_networks_progress)); | |
dialog.setCancelable(true); | |
dialog.setOnCancelListener(this); | |
break; | |
} | |
return dialog; | |
} | |
return null; | |
} | |
@Override | |
protected void onPrepareDialog(int id, Dialog dialog) { | |
if ((id == DIALOG_NETWORK_SELECTION) || (id == DIALOG_NETWORK_LIST_LOAD) || | |
(id == DIALOG_NETWORK_AUTO_SELECT)) { | |
// when the dialogs come up, we'll need to indicate that | |
// we're in a busy state to dissallow further input. | |
getPreferenceScreen().setEnabled(false); | |
} | |
} | |
private void displayEmptyNetworkList(boolean flag) { | |
mNetworkList.setTitle(flag ? R.string.empty_networks_list : R.string.label_available); | |
} | |
private void displayNetworkSeletionInProgress(String networkStr) { | |
// TODO: use notification manager? | |
mNetworkSelectMsg = getResources().getString(R.string.register_on_network, networkStr); | |
if (mIsForeground) { | |
showDialog(DIALOG_NETWORK_SELECTION); | |
} | |
} | |
private void displayNetworkQueryFailed(int error) { | |
String status = getResources().getString(R.string.network_query_error); | |
NotificationMgr.getDefault().postTransientNotification( | |
NotificationMgr.NETWORK_SELECTION_NOTIFICATION, status); | |
} | |
private void displayNetworkSelectionFailed(Throwable ex) { | |
String status; | |
if ((ex != null && ex instanceof CommandException) && | |
((CommandException)ex).getCommandError() | |
== CommandException.Error.ILLEGAL_SIM_OR_ME) | |
{ | |
status = getResources().getString(R.string.not_allowed); | |
} else { | |
status = getResources().getString(R.string.connect_later); | |
} | |
NotificationMgr.getDefault().postTransientNotification( | |
NotificationMgr.NETWORK_SELECTION_NOTIFICATION, status); | |
} | |
private void displayNetworkSelectionSucceeded() { | |
String status = getResources().getString(R.string.registration_done); | |
NotificationMgr.getDefault().postTransientNotification( | |
NotificationMgr.NETWORK_SELECTION_NOTIFICATION, status); | |
mHandler.postDelayed(new Runnable() { | |
public void run() { | |
finish(); | |
} | |
}, 3000); | |
} | |
private void loadNetworksList() { | |
if (DBG) log("load networks list..."); | |
if (mIsForeground) { | |
showDialog(DIALOG_NETWORK_LIST_LOAD); | |
} | |
// delegate query request to the service. | |
try { | |
mNetworkQueryService.startNetworkQuery(mCallback); | |
} catch (RemoteException e) { | |
} | |
displayEmptyNetworkList(false); | |
} | |
/** | |
* networksListLoaded has been rewritten to take an array of | |
* NetworkInfo objects and a status field, instead of an | |
* AsyncResult. Otherwise, the functionality which takes the | |
* NetworkInfo array and creates a list of preferences from it, | |
* remains unchanged. | |
*/ | |
private void networksListLoaded(List<NetworkInfo> result, int status) { | |
if (DBG) log("networks list loaded"); | |
// update the state of the preferences. | |
if (DBG) log("hideProgressPanel"); | |
if (mIsForeground) { | |
dismissDialog(DIALOG_NETWORK_LIST_LOAD); | |
} | |
getPreferenceScreen().setEnabled(true); | |
clearList(); | |
if (status != NetworkQueryService.QUERY_OK) { | |
if (DBG) log("error while querying available networks"); | |
displayNetworkQueryFailed(status); | |
displayEmptyNetworkList(true); | |
} else { | |
if (result != null){ | |
displayEmptyNetworkList(false); | |
// create a preference for each item in the list. | |
// just use the operator name instead of the mildly | |
// confusing mcc/mnc. | |
for (NetworkInfo ni : result) { | |
Preference carrier = new Preference(this, null); | |
carrier.setTitle(ni.getOperatorAlphaLong()); | |
carrier.setPersistent(false); | |
mNetworkList.addPreference(carrier); | |
mNetworkMap.put(carrier, ni); | |
if (DBG) log(" " + ni); | |
} | |
} else { | |
displayEmptyNetworkList(true); | |
} | |
} | |
} | |
private void clearList() { | |
for (Preference p : mNetworkMap.keySet()) { | |
mNetworkList.removePreference(p); | |
} | |
mNetworkMap.clear(); | |
} | |
private void selectNetworkAutomatic() { | |
if (DBG) log("select network automatically..."); | |
if (mIsForeground) { | |
showDialog(DIALOG_NETWORK_AUTO_SELECT); | |
} | |
Message msg = mHandler.obtainMessage(EVENT_AUTO_SELECT_DONE); | |
mPhone.setNetworkSelectionModeAutomatic(msg); | |
} | |
private void log(String msg) { | |
Log.d(LOG_TAG, "[NetworksList] " + msg); | |
} | |
} |
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