| /* |
| * Copyright (C) 2007 Google Inc. |
| * |
| * 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.app; |
| |
| import android.app.AlertDialog; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.net.ConnectivityManager; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.widget.Toast; |
| import android.util.Log; |
| |
| /** |
| * This activity is shown to the user in two cases: when a connection is possible via |
| * a usb tether and when any type of tether is connected. In the connecting case |
| * It allows them to start a USB tether. In the Tethered/disconnecting case it |
| * will disconnect all tethers. |
| */ |
| public class TetherActivity extends AlertActivity implements |
| DialogInterface.OnClickListener { |
| |
| private static final int POSITIVE_BUTTON = AlertDialog.BUTTON1; |
| |
| // count of the number of tethered connections at activity create time. |
| private int mTethered; |
| |
| /* Used to detect when the USB cable is unplugged, so we can call finish() */ |
| private BroadcastReceiver mTetherReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (intent.getAction() == ConnectivityManager.ACTION_TETHER_STATE_CHANGED) { |
| handleTetherStateChanged(intent); |
| } |
| } |
| }; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| // determine if we advertise tethering or untethering |
| ConnectivityManager cm = |
| (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); |
| mTethered = cm.getTetheredIfaces().length; |
| int tetherable = cm.getTetherableIfaces().length; |
| if ((mTethered == 0) && (tetherable == 0)) { |
| finish(); |
| return; |
| } |
| |
| // Set up the dialog |
| // if we have a tethered connection we put up a "Do you want to Disconect" dialog |
| // otherwise we must have a tetherable interface (else we'd return above) |
| // and so we want to put up the "do you want to connect" dialog |
| if (mTethered == 0) { |
| mAlertParams.mIconId = com.android.internal.R.drawable.ic_dialog_usb; |
| mAlertParams.mTitle = getString(com.android.internal.R.string.tether_title); |
| mAlertParams.mMessage = getString(com.android.internal.R.string.tether_message); |
| mAlertParams.mPositiveButtonText = |
| getString(com.android.internal.R.string.tether_button); |
| mAlertParams.mPositiveButtonListener = this; |
| mAlertParams.mNegativeButtonText = |
| getString(com.android.internal.R.string.tether_button_cancel); |
| mAlertParams.mNegativeButtonListener = this; |
| } else { |
| mAlertParams.mIconId = com.android.internal.R.drawable.ic_dialog_usb; |
| mAlertParams.mTitle = getString(com.android.internal.R.string.tether_stop_title); |
| mAlertParams.mMessage = getString(com.android.internal.R.string.tether_stop_message); |
| mAlertParams.mPositiveButtonText = |
| getString(com.android.internal.R.string.tether_stop_button); |
| mAlertParams.mPositiveButtonListener = this; |
| mAlertParams.mNegativeButtonText = |
| getString(com.android.internal.R.string.tether_stop_button_cancel); |
| mAlertParams.mNegativeButtonListener = this; |
| } |
| setupAlert(); |
| } |
| |
| @Override |
| protected void onResume() { |
| super.onResume(); |
| |
| registerReceiver(mTetherReceiver, new IntentFilter( |
| ConnectivityManager.ACTION_TETHER_STATE_CHANGED)); |
| } |
| |
| @Override |
| protected void onPause() { |
| super.onPause(); |
| |
| unregisterReceiver(mTetherReceiver); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void onClick(DialogInterface dialog, int which) { |
| boolean error = false; |
| |
| if (which == POSITIVE_BUTTON) { |
| ConnectivityManager cm = |
| (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); |
| // start/stop tethering |
| String[] tethered = cm.getTetheredIfaces(); |
| |
| if (tethered.length == 0) { |
| String[] tetherable = cm.getTetherableIfaces(); |
| String[] usbRegexs = cm.getTetherableUsbRegexs(); |
| for (String t : tetherable) { |
| for (String r : usbRegexs) { |
| if (t.matches(r)) { |
| if (!cm.tether(t)) |
| error = true; |
| break; |
| } |
| } |
| } |
| if (error) { |
| showTetheringError(); |
| } |
| } else { |
| for (String t : tethered) { |
| if (!cm.untether("ppp0")) { |
| error = true; |
| } |
| } |
| if (error) { |
| showUnTetheringError(); |
| } |
| } |
| } |
| // No matter what, finish the activity |
| finish(); |
| } |
| |
| private void handleTetherStateChanged(Intent intent) { |
| // determine if we advertise tethering or untethering |
| ConnectivityManager cm = |
| (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); |
| if (mTethered != cm.getTetheredIfaces().length) { |
| finish(); |
| } |
| } |
| |
| private void showTetheringError() { |
| Toast.makeText(this, com.android.internal.R.string.tether_error_message, |
| Toast.LENGTH_LONG).show(); |
| } |
| |
| private void showUnTetheringError() { |
| Toast.makeText(this, com.android.internal.R.string.tether_stop_error_message, |
| Toast.LENGTH_LONG).show(); |
| } |
| |
| } |