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
onCreate(Bundle savedInstanceState)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
onDestroy()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 
showMMIDialog()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      */
onMMIComplete(MmiCode mmiCode)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      */
onMMICancel()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 
dismissDialogsAndFinish()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