1 /* 2 * Copyright (C) 2016 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.incallui.legacyblocking; 18 19 import android.Manifest.permission; 20 import android.annotation.TargetApi; 21 import android.content.Context; 22 import android.content.pm.PackageManager; 23 import android.database.Cursor; 24 import android.os.AsyncTask; 25 import android.os.Build.VERSION_CODES; 26 import android.provider.CallLog; 27 import android.support.v4.content.ContextCompat; 28 import com.android.dialer.common.LogUtil; 29 import com.android.dialer.telecom.TelecomUtil; 30 import java.util.Objects; 31 32 /** 33 * Deletes a blocked call from the call log. This is only used on Android Marshmallow. On later 34 * versions of the OS, call blocking is implemented in the system and there's no need to mess with 35 * the call log. 36 */ 37 @TargetApi(VERSION_CODES.M) 38 public class DeleteBlockedCallTask extends AsyncTask<Void, Void, Long> { 39 40 public static final String IDENTIFIER = "DeleteBlockedCallTask"; 41 42 // Try to identify if a call log entry corresponds to a number which was blocked. We match by 43 // by comparing its creation time to the time it was added in the InCallUi and seeing if they 44 // fall within a certain threshold. 45 private static final int MATCH_BLOCKED_CALL_THRESHOLD_MS = 3000; 46 47 private final Context context; 48 private final Listener listener; 49 private final String number; 50 private final long timeAddedMillis; 51 52 /** 53 * Creates the task to delete the new {@link CallLog} entry from the given blocked number. 54 * 55 * @param number The blocked number. 56 * @param timeAddedMillis The time at which the call from the blocked number was placed. 57 */ DeleteBlockedCallTask( Context context, Listener listener, String number, long timeAddedMillis)58 public DeleteBlockedCallTask( 59 Context context, Listener listener, String number, long timeAddedMillis) { 60 this.context = Objects.requireNonNull(context); 61 this.listener = Objects.requireNonNull(listener); 62 this.number = number; 63 this.timeAddedMillis = timeAddedMillis; 64 } 65 66 @Override doInBackground(Void... params)67 public Long doInBackground(Void... params) { 68 if (ContextCompat.checkSelfPermission(context, permission.READ_CALL_LOG) 69 != PackageManager.PERMISSION_GRANTED 70 || ContextCompat.checkSelfPermission(context, permission.WRITE_CALL_LOG) 71 != PackageManager.PERMISSION_GRANTED) { 72 LogUtil.i("DeleteBlockedCallTask.doInBackground", "missing call log permissions"); 73 return -1L; 74 } 75 76 // First, lookup the call log entry of the most recent call with this number. 77 try (Cursor cursor = 78 context 79 .getContentResolver() 80 .query( 81 TelecomUtil.getCallLogUri(context), 82 CallLogDeleteBlockedCallQuery.PROJECTION, 83 CallLog.Calls.NUMBER + "= ?", 84 new String[] {number}, 85 CallLog.Calls.DATE + " DESC LIMIT 1")) { 86 87 // If match is found, delete this call log entry and return the call log entry id. 88 if (cursor != null && cursor.moveToFirst()) { 89 long creationTime = cursor.getLong(CallLogDeleteBlockedCallQuery.DATE_COLUMN_INDEX); 90 if (timeAddedMillis > creationTime 91 && timeAddedMillis - creationTime < MATCH_BLOCKED_CALL_THRESHOLD_MS) { 92 long callLogEntryId = cursor.getLong(CallLogDeleteBlockedCallQuery.ID_COLUMN_INDEX); 93 context 94 .getContentResolver() 95 .delete( 96 TelecomUtil.getCallLogUri(context), 97 CallLog.Calls._ID + " IN (" + callLogEntryId + ")", 98 null); 99 return callLogEntryId; 100 } 101 } 102 } 103 return -1L; 104 } 105 106 @Override onPostExecute(Long callLogEntryId)107 public void onPostExecute(Long callLogEntryId) { 108 listener.onDeleteBlockedCallTaskComplete(callLogEntryId >= 0); 109 } 110 111 /** Callback invoked when delete is complete. */ 112 public interface Listener { 113 onDeleteBlockedCallTaskComplete(boolean didFindEntry)114 void onDeleteBlockedCallTaskComplete(boolean didFindEntry); 115 } 116 117 private static class CallLogDeleteBlockedCallQuery { 118 119 static final String[] PROJECTION = new String[] {CallLog.Calls._ID, CallLog.Calls.DATE}; 120 121 static final int ID_COLUMN_INDEX = 0; 122 static final int DATE_COLUMN_INDEX = 1; 123 } 124 } 125