1 /* 2 * Copyright (C) 2015 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.messaging.datamodel.data; 18 19 import android.app.LoaderManager; 20 import android.content.Context; 21 import android.content.Loader; 22 import android.database.Cursor; 23 import android.os.Bundle; 24 import android.support.annotation.Nullable; 25 26 import com.android.messaging.datamodel.BoundCursorLoader; 27 import com.android.messaging.datamodel.GalleryBoundCursorLoader; 28 import com.android.messaging.datamodel.binding.BindableData; 29 import com.android.messaging.datamodel.binding.BindingBase; 30 import com.android.messaging.util.Assert; 31 import com.android.messaging.util.BuglePrefs; 32 import com.android.messaging.util.BuglePrefsKeys; 33 import com.android.messaging.util.LogUtil; 34 35 /** 36 * Services data needs for MediaPicker. 37 */ 38 public class MediaPickerData extends BindableData { 39 public interface MediaPickerDataListener { onMediaPickerDataUpdated(MediaPickerData mediaPickerData, Object data, int loaderId)40 void onMediaPickerDataUpdated(MediaPickerData mediaPickerData, Object data, int loaderId); 41 } 42 43 private static final String BINDING_ID = "bindingId"; 44 private final Context mContext; 45 private LoaderManager mLoaderManager; 46 private final GalleryLoaderCallbacks mGalleryLoaderCallbacks; 47 private MediaPickerDataListener mListener; 48 MediaPickerData(final Context context)49 public MediaPickerData(final Context context) { 50 mContext = context; 51 mGalleryLoaderCallbacks = new GalleryLoaderCallbacks(); 52 } 53 54 public static final int GALLERY_IMAGE_LOADER = 1; 55 56 /** 57 * A trampoline class so that we can inherit from LoaderManager.LoaderCallbacks multiple times. 58 */ 59 private class GalleryLoaderCallbacks implements LoaderManager.LoaderCallbacks<Cursor> { 60 @Override onCreateLoader(final int id, final Bundle args)61 public Loader<Cursor> onCreateLoader(final int id, final Bundle args) { 62 final String bindingId = args.getString(BINDING_ID); 63 // Check if data still bound to the requesting ui element 64 if (isBound(bindingId)) { 65 switch (id) { 66 case GALLERY_IMAGE_LOADER: 67 return new GalleryBoundCursorLoader(bindingId, mContext); 68 69 default: 70 Assert.fail("Unknown loader id for gallery picker!"); 71 break; 72 } 73 } else { 74 LogUtil.w(LogUtil.BUGLE_TAG, "Loader created after unbinding the media picker"); 75 } 76 return null; 77 } 78 79 /** 80 * {@inheritDoc} 81 */ 82 @Override onLoadFinished(final Loader<Cursor> loader, final Cursor data)83 public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) { 84 final BoundCursorLoader cursorLoader = (BoundCursorLoader) loader; 85 if (isBound(cursorLoader.getBindingId())) { 86 switch (loader.getId()) { 87 case GALLERY_IMAGE_LOADER: 88 mListener.onMediaPickerDataUpdated(MediaPickerData.this, data, 89 GALLERY_IMAGE_LOADER); 90 break; 91 92 default: 93 Assert.fail("Unknown loader id for gallery picker!"); 94 break; 95 } 96 } else { 97 LogUtil.w(LogUtil.BUGLE_TAG, "Loader finished after unbinding the media picker"); 98 } 99 } 100 101 /** 102 * {@inheritDoc} 103 */ 104 @Override onLoaderReset(final Loader<Cursor> loader)105 public void onLoaderReset(final Loader<Cursor> loader) { 106 final BoundCursorLoader cursorLoader = (BoundCursorLoader) loader; 107 if (isBound(cursorLoader.getBindingId())) { 108 switch (loader.getId()) { 109 case GALLERY_IMAGE_LOADER: 110 mListener.onMediaPickerDataUpdated(MediaPickerData.this, null, 111 GALLERY_IMAGE_LOADER); 112 break; 113 114 default: 115 Assert.fail("Unknown loader id for media picker!"); 116 break; 117 } 118 } else { 119 LogUtil.w(LogUtil.BUGLE_TAG, "Loader reset after unbinding the media picker"); 120 } 121 } 122 } 123 124 125 startLoader(final int loaderId, final BindingBase<MediaPickerData> binding, @Nullable Bundle args, final MediaPickerDataListener listener)126 public void startLoader(final int loaderId, final BindingBase<MediaPickerData> binding, 127 @Nullable Bundle args, final MediaPickerDataListener listener) { 128 if (args == null) { 129 args = new Bundle(); 130 } 131 args.putString(BINDING_ID, binding.getBindingId()); 132 if (loaderId == GALLERY_IMAGE_LOADER) { 133 mLoaderManager.initLoader(loaderId, args, mGalleryLoaderCallbacks).forceLoad(); 134 } else { 135 Assert.fail("Unsupported loader id for media picker!"); 136 } 137 mListener = listener; 138 } 139 destroyLoader(final int loaderId)140 public void destroyLoader(final int loaderId) { 141 mLoaderManager.destroyLoader(loaderId); 142 } 143 init(final LoaderManager loaderManager)144 public void init(final LoaderManager loaderManager) { 145 mLoaderManager = loaderManager; 146 } 147 148 @Override unregisterListeners()149 protected void unregisterListeners() { 150 // This could be null if we bind but the caller doesn't init the BindableData 151 if (mLoaderManager != null) { 152 mLoaderManager.destroyLoader(GALLERY_IMAGE_LOADER); 153 mLoaderManager = null; 154 } 155 } 156 157 /** 158 * Gets the last selected chooser index, or -1 if no selection has been saved. 159 */ getSelectedChooserIndex()160 public int getSelectedChooserIndex() { 161 return BuglePrefs.getApplicationPrefs().getInt( 162 BuglePrefsKeys.SELECTED_MEDIA_PICKER_CHOOSER_INDEX, 163 BuglePrefsKeys.SELECTED_MEDIA_PICKER_CHOOSER_INDEX_DEFAULT); 164 } 165 166 /** 167 * Saves the selected media chooser index. 168 * @param selectedIndex the selected media chooser index. 169 */ saveSelectedChooserIndex(final int selectedIndex)170 public void saveSelectedChooserIndex(final int selectedIndex) { 171 BuglePrefs.getApplicationPrefs().putInt(BuglePrefsKeys.SELECTED_MEDIA_PICKER_CHOOSER_INDEX, 172 selectedIndex); 173 } 174 175 }