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/*
* Copyright (C) 2015 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.wifi;
import static android.net.ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION;
import static android.net.ConnectivityManager.ACTION_PROMPT_PARTIAL_CONNECTIVITY;
import static android.net.ConnectivityManager.ACTION_PROMPT_UNVALIDATED;
import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.ConnectivityManager.NetworkCallback;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkInfo;
import android.net.NetworkRequest;
import android.net.wifi.WifiInfo;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.CheckBox;
import androidx.annotation.VisibleForTesting;
import com.android.internal.app.AlertActivity;
import com.android.internal.app.AlertController;
import com.android.settings.R;
/**
* To display a dialog that asks the user whether to connect to a network that is not validated.
*/
public class WifiNoInternetDialog extends AlertActivity implements
DialogInterface.OnClickListener {
private static final String TAG = "WifiNoInternetDialog";
private ConnectivityManager mCM;
private Network mNetwork;
private String mNetworkName;
private ConnectivityManager.NetworkCallback mNetworkCallback;
@VisibleForTesting CheckBox mAlwaysAllow;
private String mAction;
private boolean mButtonClicked;
private boolean isKnownAction(Intent intent) {
return ACTION_PROMPT_UNVALIDATED.equals(intent.getAction())
|| ACTION_PROMPT_LOST_VALIDATION.equals(intent.getAction())
|| ACTION_PROMPT_PARTIAL_CONNECTIVITY.equals(intent.getAction());
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Intent intent = getIntent();
if (intent == null || !isKnownAction(intent)) {
Log.e(TAG, "Unexpected intent " + intent + ", exiting");
finish();
return;
}
mAction = intent.getAction();
mNetwork = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK);
if (mNetwork == null) {
Log.e(TAG, "Can't determine network from intent extra, exiting");
finish();
return;
}
// TODO: add a registerNetworkCallback(Network network, NetworkCallback networkCallback) and
// simplify this.
final NetworkRequest request = new NetworkRequest.Builder().clearCapabilities().build();
mNetworkCallback = new NetworkCallback() {
@Override
public void onLost(Network network) {
// Close the dialog if the network disconnects.
if (mNetwork.equals(network)) {
Log.d(TAG, "Network " + mNetwork + " disconnected");
finish();
}
}
@Override
public void onCapabilitiesChanged(Network network, NetworkCapabilities nc) {
// Close the dialog if the network validates.
if (mNetwork.equals(network) && nc.hasCapability(NET_CAPABILITY_VALIDATED)) {
Log.d(TAG, "Network " + mNetwork + " validated");
finish();
}
}
};
mCM = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
mCM.registerNetworkCallback(request, mNetworkCallback);
final NetworkInfo ni = mCM.getNetworkInfo(mNetwork);
final NetworkCapabilities nc = mCM.getNetworkCapabilities(mNetwork);
if (ni == null || !ni.isConnectedOrConnecting() || nc == null) {
Log.d(TAG, "Network " + mNetwork + " is not connected: " + ni);
finish();
return;
}
mNetworkName = nc.getSsid();
if (mNetworkName != null) {
mNetworkName = WifiInfo.sanitizeSsid(mNetworkName);
}
createDialog();
}
private void createDialog() {
mAlert.setIcon(R.drawable.ic_settings_wireless);
final AlertController.AlertParams ap = mAlertParams;
if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
ap.mTitle = mNetworkName;
ap.mMessage = getString(R.string.no_internet_access_text);
ap.mPositiveButtonText = getString(R.string.yes);
ap.mNegativeButtonText = getString(R.string.no);
} else if (ACTION_PROMPT_PARTIAL_CONNECTIVITY.equals(mAction)) {
ap.mTitle = mNetworkName;
ap.mMessage = getString(R.string.partial_connectivity_text);
ap.mPositiveButtonText = getString(R.string.yes);
ap.mNegativeButtonText = getString(R.string.no);
} else {
ap.mTitle = getString(R.string.lost_internet_access_title);
ap.mMessage = getString(R.string.lost_internet_access_text);
ap.mPositiveButtonText = getString(R.string.lost_internet_access_switch);
ap.mNegativeButtonText = getString(R.string.lost_internet_access_cancel);
}
ap.mPositiveButtonListener = this;
ap.mNegativeButtonListener = this;
final LayoutInflater inflater = LayoutInflater.from(ap.mContext);
final View checkbox = inflater.inflate(
com.android.internal.R.layout.always_use_checkbox, null);
ap.mView = checkbox;
mAlwaysAllow = (CheckBox) checkbox.findViewById(com.android.internal.R.id.alwaysUse);
if (ACTION_PROMPT_UNVALIDATED.equals(mAction)
|| ACTION_PROMPT_PARTIAL_CONNECTIVITY.equals(mAction)) {
mAlwaysAllow.setText(getString(R.string.no_internet_access_remember));
} else {
mAlwaysAllow.setText(getString(R.string.lost_internet_access_persist));
}
setupAlert();
}
@Override
protected void onDestroy() {
if (mNetworkCallback != null) {
mCM.unregisterNetworkCallback(mNetworkCallback);
mNetworkCallback = null;
}
// If the user exits the no Internet or partial connectivity dialog without taking any
// action, disconnect the network, because once the dialog has been dismissed there is no
// way to use the network.
//
// Unfortunately, AlertDialog does not seem to offer any good way to get an onCancel or
// onDismiss callback. So we implement this ourselves.
if (isFinishing() && !mButtonClicked) {
if (ACTION_PROMPT_PARTIAL_CONNECTIVITY.equals(mAction)) {
mCM.setAcceptPartialConnectivity(mNetwork, false /* accept */, false /* always */);
} else if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
mCM.setAcceptUnvalidated(mNetwork, false /* accept */, false /* always */);
}
}
super.onDestroy();
}
@Override
public void onClick(DialogInterface dialog, int which) {
if (which != BUTTON_NEGATIVE && which != BUTTON_POSITIVE) return;
final boolean always = mAlwaysAllow.isChecked();
final String what, action;
mButtonClicked = true;
if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
what = "NO_INTERNET";
final boolean accept = (which == BUTTON_POSITIVE);
action = (accept ? "Connect" : "Ignore");
mCM.setAcceptUnvalidated(mNetwork, accept, always);
} else if (ACTION_PROMPT_PARTIAL_CONNECTIVITY.equals(mAction)) {
what = "PARTIAL_CONNECTIVITY";
final boolean accept = (which == BUTTON_POSITIVE);
action = (accept ? "Connect" : "Ignore");
mCM.setAcceptPartialConnectivity(mNetwork, accept, always);
} else {
what = "LOST_INTERNET";
final boolean avoid = (which == BUTTON_POSITIVE);
action = (avoid ? "Switch away" : "Get stuck");
if (always) {
Settings.Global.putString(mAlertParams.mContext.getContentResolver(),
Settings.Global.NETWORK_AVOID_BAD_WIFI, avoid ? "1" : "0");
} else if (avoid) {
mCM.setAvoidUnvalidated(mNetwork);
}
}
Log.d(TAG, what + ": " + action + " network=" + mNetwork +
(always ? " and remember" : ""));
}
}