| /* |
| * Copyright (C) 2017 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.server.connectivity.tethering; |
| |
| import static com.android.internal.telephony.IccCardConstants.INTENT_VALUE_ICC_LOADED; |
| import static com.android.internal.telephony.IccCardConstants.INTENT_KEY_ICC_STATE; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.Handler; |
| import android.util.Log; |
| |
| import com.android.internal.telephony.TelephonyIntents; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| |
| /** |
| * A utility class that runs the provided callback on the provided handler when |
| * observing a new SIM card having been loaded. |
| * |
| * @hide |
| */ |
| public class SimChangeListener { |
| private static final String TAG = SimChangeListener.class.getSimpleName(); |
| private static final boolean DBG = false; |
| |
| private final Context mContext; |
| private final Handler mTarget; |
| private final AtomicInteger mSimBcastGenerationNumber; |
| private final Runnable mCallback; |
| private BroadcastReceiver mBroadcastReceiver; |
| |
| public SimChangeListener(Context ctx, Handler handler, Runnable onSimCardLoadedCallback) { |
| mContext = ctx; |
| mTarget = handler; |
| mCallback = onSimCardLoadedCallback; |
| mSimBcastGenerationNumber = new AtomicInteger(0); |
| } |
| |
| public int generationNumber() { |
| return mSimBcastGenerationNumber.get(); |
| } |
| |
| public void startListening() { |
| if (DBG) Log.d(TAG, "startListening for SIM changes"); |
| |
| if (mBroadcastReceiver != null) return; |
| |
| mBroadcastReceiver = new SimChangeBroadcastReceiver( |
| mSimBcastGenerationNumber.incrementAndGet()); |
| final IntentFilter filter = new IntentFilter(); |
| filter.addAction(TelephonyIntents.ACTION_SIM_STATE_CHANGED); |
| |
| mContext.registerReceiver(mBroadcastReceiver, filter, null, mTarget); |
| } |
| |
| public void stopListening() { |
| if (DBG) Log.d(TAG, "stopListening for SIM changes"); |
| |
| if (mBroadcastReceiver == null) return; |
| |
| mSimBcastGenerationNumber.incrementAndGet(); |
| mContext.unregisterReceiver(mBroadcastReceiver); |
| mBroadcastReceiver = null; |
| } |
| |
| private boolean isSimCardLoaded(String state) { |
| return INTENT_VALUE_ICC_LOADED.equals(state); |
| } |
| |
| private class SimChangeBroadcastReceiver extends BroadcastReceiver { |
| // used to verify this receiver is still current |
| final private int mGenerationNumber; |
| |
| // used to check the sim state transition from non-loaded to loaded |
| private boolean mSimNotLoadedSeen = false; |
| |
| public SimChangeBroadcastReceiver(int generationNumber) { |
| mGenerationNumber = generationNumber; |
| } |
| |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| final int currentGenerationNumber = mSimBcastGenerationNumber.get(); |
| |
| if (DBG) { |
| Log.d(TAG, "simchange mGenerationNumber=" + mGenerationNumber + |
| ", current generationNumber=" + currentGenerationNumber); |
| } |
| if (mGenerationNumber != currentGenerationNumber) return; |
| |
| final String state = intent.getStringExtra(INTENT_KEY_ICC_STATE); |
| Log.d(TAG, "got Sim changed to state " + state + ", mSimNotLoadedSeen=" + |
| mSimNotLoadedSeen); |
| |
| if (!isSimCardLoaded(state)) { |
| mSimNotLoadedSeen = true; |
| return; |
| } |
| |
| if (mSimNotLoadedSeen) { |
| mSimNotLoadedSeen = false; |
| mCallback.run(); |
| } |
| } |
| } |
| } |