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.example.android.networkconnect; 18 19 import android.net.NetworkInfo; 20 import android.support.annotation.IntDef; 21 22 /** 23 * Sample interface containing bare minimum methods needed for an asynchronous task 24 * to update the UI Context. 25 */ 26 27 public interface DownloadCallback { 28 interface Progress { 29 int ERROR = -1; 30 int CONNECT_SUCCESS = 0; 31 int GET_INPUT_STREAM_SUCCESS = 1; 32 int PROCESS_INPUT_STREAM_IN_PROGRESS = 2; 33 int PROCESS_INPUT_STREAM_SUCCESS = 3; 34 } 35 36 /** 37 * Indicates that the callback handler needs to update its appearance or information based on 38 * the result of the task. Expected to be called from the main thread. 39 */ 40 void updateFromDownload(String result); 41 42 /** 43 * Get the device's active network status in the form of a NetworkInfo object. 44 */ 45 NetworkInfo getActiveNetworkInfo(); 46 47 /** 48 * Indicate to callback handler any progress update. 49 * @param progressCode must be one of the constants defined in DownloadCallback.Progress. 50 * @param percentComplete must be 0-100. 51 */ 52 void onProgressUpdate(int progressCode, int percentComplete); 53 54 /** 55 * Indicates that the download operation has finished. This method is called even if the 56 * download hasn't completed successfully. 57 */ 58 void finishDownloading(); 59 60 } 61
