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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     private void showMMIDialog() {
     73         final List<? extends MmiCode> codes = mPhone.getPendingMmiCodes();
     74         if (codes.size() > 0) {
     75             final MmiCode mmiCode = codes.get(0);
     76             final Message message = Message.obtain(mHandler, PhoneGlobals.MMI_CANCEL);
     77             mMMIDialog = PhoneUtils.displayMMIInitiate(this, mmiCode, message, mMMIDialog);
     78         } else {
     79             finish();
     80         }
     81     }
     82 
     83     /**
     84      * Handles an MMI_COMPLETE event, which is triggered by telephony
     85      */
     86     private void onMMIComplete(MmiCode mmiCode) {
     87         // Check the code to see if the request is ready to
     88         // finish, this includes any MMI state that is not
     89         // PENDING.
     90 
     91         // if phone is a CDMA phone display feature code completed message
     92         int phoneType = mPhone.getPhoneType();
     93         if (phoneType == PhoneConstants.PHONE_TYPE_CDMA) {
     94             PhoneUtils.displayMMIComplete(mPhone, this, mmiCode, null, null);
     95         } else if (phoneType == PhoneConstants.PHONE_TYPE_GSM) {
     96             if (mmiCode.getState() != MmiCode.State.PENDING) {
     97                 Log.d(TAG, "Got MMI_COMPLETE, finishing dialog activity...");
     98                 dismissDialogsAndFinish();
     99             }
    100         }
    101     }
    102 
    103     /**
    104      * Handles an MMI_CANCEL event, which is triggered by the button
    105      * (labeled either "OK" or "Cancel") on the "MMI Started" dialog.
    106      * @see PhoneUtils#cancelMmiCode(Phone)
    107      */
    108     private void onMMICancel() {
    109         Log.v(TAG, "onMMICancel()...");
    110 
    111         // First of all, cancel the outstanding MMI code (if possible.)
    112         PhoneUtils.cancelMmiCode(mPhone);
    113 
    114         // Regardless of whether the current MMI code was cancelable, the
    115         // PhoneApp will get an MMI_COMPLETE event very soon, which will
    116         // take us to the MMI Complete dialog (see
    117         // PhoneUtils.displayMMIComplete().)
    118         //
    119         // But until that event comes in, we *don't* want to stay here on
    120         // the in-call screen, since we'll be visible in a
    121         // partially-constructed state as soon as the "MMI Started" dialog
    122         // gets dismissed. So let's forcibly bail out right now.
    123         Log.d(TAG, "onMMICancel: finishing InCallScreen...");
    124         dismissDialogsAndFinish();
    125     }
    126 
    127     private void dismissDialogsAndFinish() {
    128         if (mMMIDialog != null) {
    129             mMMIDialog.dismiss();
    130         }
    131         if (mHandler != null) {
    132             mCM.unregisterForMmiComplete(mHandler);
    133         }
    134         finish();
    135     }
    136 }
    137