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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.phone;
     18 
     19 import android.app.Activity;
     20 import android.app.Dialog;
     21 import android.os.AsyncResult;
     22 import android.os.Bundle;
     23 import android.os.Handler;
     24 import android.os.Message;
     25 import android.util.Log;
     26 import android.widget.Toast;
     27 
     28 import com.android.internal.telephony.CallManager;
     29 import com.android.internal.telephony.MmiCode;
     30 import com.android.internal.telephony.Phone;
     31 import com.android.internal.telephony.PhoneConstants;
     32 
     33 import java.util.List;
     34 
     35 /**
     36  * Used to display a dialog from within the Telephony service when running an USSD code
     37  */
     38 public class MMIDialogActivity extends Activity {
     39     private static final String TAG = MMIDialogActivity.class.getSimpleName();
     40 
     41     private Dialog mMMIDialog;
     42 
     43     private Handler mHandler;
     44 
     45     private CallManager mCM = PhoneGlobals.getInstance().getCallManager();
     46     private Phone mPhone = PhoneGlobals.getPhone();
     47 
     48 
     49     @Override
     50     protected void onCreate(Bundle savedInstanceState) {
     51         super.onCreate(savedInstanceState);
     52         mHandler = new Handler() {
     53                 @Override
     54                 public void handleMessage(Message msg) {
     55                     switch (msg.what) {
     56                         case PhoneGlobals.MMI_COMPLETE:
     57                             onMMIComplete((MmiCode) ((AsyncResult) msg.obj).result);
     58                             break;
     59                         case PhoneGlobals.MMI_CANCEL:
     60                             onMMICancel();
     61                             break;
     62                     }
     63                 }
     64         };
     65         mCM.registerForMmiComplete(mHandler, PhoneGlobals.MMI_COMPLETE, null);
     66         if (mCM.getState() == PhoneConstants.State.OFFHOOK) {
     67             Toast.makeText(this, R.string.incall_status_dialed_mmi, Toast.LENGTH_SHORT).show();
     68         }
     69         showMMIDialog();
     70     }
     71 
     72     @Override
     73     protected void onDestroy() {
     74         super.onDestroy();
     75 
     76         if (mMMIDialog != null) {
     77             mMMIDialog.dismiss();
     78             mMMIDialog = null;
     79         }
     80         if (mHandler != null) {
     81             mCM.unregisterForMmiComplete(mHandler);
     82             mHandler = null;
     83         }
     84     }
     85 
     86     private void showMMIDialog() {
     87         final List<? extends MmiCode> codes = mPhone.getPendingMmiCodes();
     88         if (codes.size() > 0) {
     89             final MmiCode mmiCode = codes.get(0);
     90             final Message message = Message.obtain(mHandler, PhoneGlobals.MMI_CANCEL);
     91             mMMIDialog = PhoneUtils.displayMMIInitiate(this, mmiCode, message, mMMIDialog);
     92         } else {
     93             finish();
     94         }
     95     }
     96 
     97     /**
     98      * Handles an MMI_COMPLETE event, which is triggered by telephony
     99      */
    100     private void onMMIComplete(MmiCode mmiCode) {
    101         // Check the code to see if the request is ready to
    102         // finish, this includes any MMI state that is not
    103         // PENDING.
    104 
    105         // if phone is a CDMA phone display feature code completed message
    106         int phoneType = mPhone.getPhoneType();
    107         if (phoneType == PhoneConstants.PHONE_TYPE_CDMA) {
    108             PhoneUtils.displayMMIComplete(mPhone, this, mmiCode, null, null);
    109         } else if (phoneType == PhoneConstants.PHONE_TYPE_GSM) {
    110             if (mmiCode.getState() != MmiCode.State.PENDING) {
    111                 Log.d(TAG, "Got MMI_COMPLETE, finishing dialog activity...");
    112                 dismissDialogsAndFinish();
    113             }
    114         }
    115     }
    116 
    117     /**
    118      * Handles an MMI_CANCEL event, which is triggered by the button
    119      * (labeled either "OK" or "Cancel") on the "MMI Started" dialog.
    120      * @see PhoneUtils#cancelMmiCode(Phone)
    121      */
    122     private void onMMICancel() {
    123         Log.v(TAG, "onMMICancel()...");
    124 
    125         // First of all, cancel the outstanding MMI code (if possible.)
    126         PhoneUtils.cancelMmiCode(mPhone);
    127 
    128         // Regardless of whether the current MMI code was cancelable, the
    129         // PhoneApp will get an MMI_COMPLETE event very soon, which will
    130         // take us to the MMI Complete dialog (see
    131         // PhoneUtils.displayMMIComplete().)
    132         //
    133         // But until that event comes in, we *don't* want to stay here on
    134         // the in-call screen, since we'll be visible in a
    135         // partially-constructed state as soon as the "MMI Started" dialog
    136         // gets dismissed. So let's forcibly bail out right now.
    137         Log.d(TAG, "onMMICancel: finishing InCallScreen...");
    138         dismissDialogsAndFinish();
    139     }
    140 
    141     private void dismissDialogsAndFinish() {
    142         if (mMMIDialog != null) {
    143             mMMIDialog.dismiss();
    144             mMMIDialog = null;
    145         }
    146         if (mHandler != null) {
    147             mCM.unregisterForMmiComplete(mHandler);
    148             mHandler = null;
    149         }
    150         finish();
    151     }
    152 }
    153