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
17package com.android.phone;
18
19import android.app.Activity;
20import android.app.Dialog;
21import android.content.Intent;
22import android.os.AsyncResult;
23import android.os.Bundle;
24import android.os.Handler;
25import android.os.Message;
26import android.telephony.SubscriptionManager;
27import android.util.Log;
28import android.widget.Toast;
29
30import com.android.internal.telephony.CallManager;
31import com.android.internal.telephony.MmiCode;
32import com.android.internal.telephony.Phone;
33import com.android.internal.telephony.PhoneConstants;
34
35import java.util.ArrayList;
36import java.util.List;
37
38/**
39 * Used to display a dialog from within the Telephony service when running an USSD code
40 */
41public class MMIDialogActivity extends Activity {
42    private static final String TAG = MMIDialogActivity.class.getSimpleName();
43
44    private Dialog mMMIDialog;
45
46    private Handler mHandler;
47
48    private CallManager mCM = PhoneGlobals.getInstance().getCallManager();
49    private Phone mPhone;
50
51
52    @Override
53    protected void onCreate(Bundle savedInstanceState) {
54        super.onCreate(savedInstanceState);
55        Intent intent = getIntent();
56        int subId = intent.getIntExtra(PhoneConstants.SUBSCRIPTION_KEY,
57                SubscriptionManager.DEFAULT_SUBSCRIPTION_ID);
58        mPhone = PhoneGlobals.getPhone(subId);
59        mHandler = new Handler() {
60                @Override
61                public void handleMessage(Message msg) {
62                    switch (msg.what) {
63                        case PhoneGlobals.MMI_COMPLETE:
64                            onMMIComplete((MmiCode) ((AsyncResult) msg.obj).result);
65                            break;
66                        case PhoneGlobals.MMI_CANCEL:
67                            onMMICancel();
68                            break;
69                    }
70                }
71        };
72        Log.d(TAG, "onCreate; registering for mmi complete.");
73        mCM.registerForMmiComplete(mHandler, PhoneGlobals.MMI_COMPLETE, null);
74        showMMIDialog();
75    }
76
77    @Override
78    protected void onDestroy() {
79        super.onDestroy();
80
81        if (mMMIDialog != null) {
82            mMMIDialog.dismiss();
83            mMMIDialog = null;
84        }
85        if (mHandler != null) {
86            mCM.unregisterForMmiComplete(mHandler);
87            mHandler = null;
88        }
89    }
90
91    private void showMMIDialog() {
92        final List<MmiCode> codes = new ArrayList<>(mPhone.getPendingMmiCodes());
93        // If the phone has an IMS phone, also get pending imS MMIsl.
94        if (mPhone.getImsPhone() != null) {
95            codes.addAll(mPhone.getImsPhone().getPendingMmiCodes());
96        }
97        if (codes.size() > 0) {
98            final MmiCode mmiCode = codes.get(0);
99            final Message message = Message.obtain(mHandler, PhoneGlobals.MMI_CANCEL);
100            Log.d(TAG, "showMMIDialog: mmiCode = " + mmiCode);
101            mMMIDialog = PhoneUtils.displayMMIInitiate(this, mmiCode, message, mMMIDialog);
102        } else {
103            Log.d(TAG, "showMMIDialog: no pending MMIs; finishing");
104            finish();
105        }
106    }
107
108    /**
109     * Handles an MMI_COMPLETE event, which is triggered by telephony
110     */
111    private void onMMIComplete(MmiCode mmiCode) {
112        // Check the code to see if the request is ready to
113        // finish, this includes any MMI state that is not
114        // PENDING.
115        Log.d(TAG, "onMMIComplete: mmi=" + mmiCode);
116
117        // if phone is a CDMA phone display feature code completed message
118        int phoneType = mPhone.getPhoneType();
119        if (phoneType == PhoneConstants.PHONE_TYPE_CDMA) {
120            PhoneUtils.displayMMIComplete(mPhone, this, mmiCode, null, null);
121        } else if (phoneType == PhoneConstants.PHONE_TYPE_GSM) {
122            if (mmiCode.getState() != MmiCode.State.PENDING) {
123                Log.d(TAG, "onMMIComplete: Got MMI_COMPLETE, finishing dialog activity...");
124                dismissDialogsAndFinish();
125            } else {
126                Log.d(TAG, "onMMIComplete: still pending.");
127            }
128        }
129    }
130
131    /**
132     * Handles an MMI_CANCEL event, which is triggered by the button
133     * (labeled either "OK" or "Cancel") on the "MMI Started" dialog.
134     * @see PhoneUtils#cancelMmiCode(Phone)
135     */
136    private void onMMICancel() {
137        Log.v(TAG, "onMMICancel()...");
138
139        // First of all, cancel the outstanding MMI code (if possible.)
140        PhoneUtils.cancelMmiCode(mPhone);
141
142        // Regardless of whether the current MMI code was cancelable, the
143        // PhoneApp will get an MMI_COMPLETE event very soon, which will
144        // take us to the MMI Complete dialog (see
145        // PhoneUtils.displayMMIComplete().)
146        //
147        // But until that event comes in, we *don't* want to stay here on
148        // the in-call screen, since we'll be visible in a
149        // partially-constructed state as soon as the "MMI Started" dialog
150        // gets dismissed. So let's forcibly bail out right now.
151        Log.d(TAG, "onMMICancel: finishing MMI dialog...");
152        dismissDialogsAndFinish();
153    }
154
155    private void dismissDialogsAndFinish() {
156        if (mMMIDialog != null) {
157            mMMIDialog.dismiss();
158            mMMIDialog = null;
159        }
160        if (mHandler != null) {
161            mCM.unregisterForMmiComplete(mHandler);
162            mHandler = null;
163        }
164        Log.v(TAG, "dismissDialogsAndFinish");
165        finish();
166    }
167}
168