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.storagemanager.deletionhelper; 18 19 import android.app.Activity; 20 import android.content.Context; 21 import android.os.Bundle; 22 import android.support.v7.preference.PreferenceGroup; 23 import android.support.v7.preference.Preference; 24 25 /** 26 * Helper for the Deletion Helper which can query, clear out, and visualize deletable data. 27 * This could represent a helper for deleting photos, downloads, movies, etc. 28 */ 29 public interface DeletionType { 30 /** 31 * Registers a callback to call when the amount of freeable space is updated. 32 * @param listener A callback. 33 */ registerFreeableChangedListener(FreeableChangedListener listener)34 void registerFreeableChangedListener(FreeableChangedListener listener); 35 36 /** 37 * Resumes an operation, intended to be called when the deletion fragment resumes. 38 */ onResume()39 void onResume(); 40 41 /** 42 * Pauses the feature's operations, intended to be called when the deletion fragment is paused. 43 */ onPause()44 void onPause(); 45 onSaveInstanceStateBundle(Bundle savedInstanceState)46 void onSaveInstanceStateBundle(Bundle savedInstanceState); 47 48 /** 49 * Asynchronously free up the freeable information for the feature. 50 */ clearFreeableData(Activity activity)51 void clearFreeableData(Activity activity); 52 53 /** 54 * Callback interface to listen for when a deletion feature's amount of freeable space updates. 55 */ 56 interface FreeableChangedListener { onFreeableChanged(int numItems, long bytesFreeable)57 void onFreeableChanged(int numItems, long bytesFreeable); 58 } 59 } 60