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      1 /*
      2  * Copyright (C) 2012 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.mms.util;
     18 
     19 import android.content.Context;
     20 import android.os.AsyncTask;
     21 import android.telephony.PhoneNumberFormattingTextWatcher;
     22 import android.widget.TextView;
     23 
     24 import com.android.mms.MmsApp;
     25 
     26 public final class PhoneNumberFormatter {
     27     private PhoneNumberFormatter() {}
     28 
     29     /**
     30      * Load {@link TextWatcherLoadAsyncTask} in a worker thread and set it to a {@link TextView}.
     31      */
     32     private static class TextWatcherLoadAsyncTask extends
     33             AsyncTask<Void, Void, PhoneNumberFormattingTextWatcher> {
     34         private final String mCountryCode;
     35         private final TextView mTextView;
     36 
     37         public TextWatcherLoadAsyncTask(String countryCode, TextView textView) {
     38             mCountryCode = countryCode;
     39             mTextView = textView;
     40         }
     41 
     42         @Override
     43         protected PhoneNumberFormattingTextWatcher doInBackground(Void... params) {
     44             return new PhoneNumberFormattingTextWatcher(mCountryCode);
     45         }
     46 
     47         @Override
     48         protected void onPostExecute(PhoneNumberFormattingTextWatcher watcher) {
     49             if (watcher == null || isCancelled()) {
     50                 return; // May happen if we cancel the task.
     51             }
     52             // Setting a text changed listener is safe even after the view is detached.
     53             mTextView.addTextChangedListener(watcher);
     54 
     55             // Note changes the user made before onPostExecute() will not be formatted, but
     56             // once they type the next letter we format the entire text, so it's not a big deal.
     57             // (And loading PhoneNumberFormattingTextWatcher is usually fast enough.)
     58             // We could use watcher.afterTextChanged(mTextView.getEditableText()) to force format
     59             // the existing content here, but that could cause unwanted results.
     60             // (e.g. the contact editor thinks the user changed the content, and would save
     61             // when closed even when the user didn't make other changes.)
     62         }
     63     }
     64 
     65     /**
     66      * Delay-set {@link PhoneNumberFormattingTextWatcher} to a {@link TextView}.
     67      */
     68     public static final void setPhoneNumberFormattingTextWatcher(Context context,
     69             TextView textView) {
     70         new TextWatcherLoadAsyncTask(MmsApp.getApplication().getCurrentCountryIso(), textView)
     71                 .executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
     72     }
     73 }
     74