BrowserSnapshotPage.java revision d3e4d5b4ffdf374b836ec9d4d3e315040c8c3779
1/* 2 * Copyright (C) 2011 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 */ 16package com.android.browser; 17 18import android.app.Fragment; 19import android.app.LoaderManager.LoaderCallbacks; 20import android.content.ContentResolver; 21import android.content.ContentUris; 22import android.content.Context; 23import android.content.CursorLoader; 24import android.content.Loader; 25import android.database.Cursor; 26import android.graphics.Bitmap; 27import android.graphics.BitmapFactory; 28import android.net.Uri; 29import android.os.Bundle; 30import android.view.ContextMenu; 31import android.view.ContextMenu.ContextMenuInfo; 32import android.view.LayoutInflater; 33import android.view.MenuInflater; 34import android.view.MenuItem; 35import android.view.View; 36import android.view.View.MeasureSpec; 37import android.view.ViewGroup; 38import android.widget.AdapterView; 39import android.widget.AdapterView.AdapterContextMenuInfo; 40import android.widget.AdapterView.OnItemClickListener; 41import android.widget.GridView; 42import android.widget.ImageView; 43import android.widget.ResourceCursorAdapter; 44import android.widget.TextView; 45 46import com.android.browser.CombinedBookmarkHistoryView.CombinedBookmarksCallbacks; 47import com.android.browser.provider.SnapshotProvider.Snapshots; 48 49import java.text.DateFormat; 50import java.util.Date; 51 52public class BrowserSnapshotPage extends Fragment implements 53 LoaderCallbacks<Cursor>, OnItemClickListener { 54 55 public static final String EXTRA_ANIMATE_ID = "animate_id"; 56 57 private static final int LOADER_SNAPSHOTS = 1; 58 private static final String[] PROJECTION = new String[] { 59 Snapshots._ID, 60 Snapshots.TITLE, 61 "length(" + Snapshots.VIEWSTATE + ")", 62 Snapshots.THUMBNAIL, 63 Snapshots.FAVICON, 64 Snapshots.URL, 65 Snapshots.DATE_CREATED, 66 }; 67 private static final int SNAPSHOT_TITLE = 1; 68 private static final int SNAPSHOT_VIEWSTATE_LENGTH = 2; 69 private static final int SNAPSHOT_THUMBNAIL = 3; 70 private static final int SNAPSHOT_FAVICON = 4; 71 private static final int SNAPSHOT_URL = 5; 72 private static final int SNAPSHOT_DATE_CREATED = 6; 73 74 GridView mGrid; 75 View mEmpty; 76 SnapshotAdapter mAdapter; 77 CombinedBookmarksCallbacks mCallback; 78 79 public static BrowserSnapshotPage newInstance(CombinedBookmarksCallbacks cb, 80 Bundle extras) { 81 BrowserSnapshotPage instance = new BrowserSnapshotPage(); 82 instance.mCallback = cb; 83 instance.setArguments(extras); 84 return instance; 85 } 86 87 @Override 88 public View onCreateView(LayoutInflater inflater, ViewGroup container, 89 Bundle savedInstanceState) { 90 View view = inflater.inflate(R.layout.snapshots, container, false); 91 mEmpty = view.findViewById(android.R.id.empty); 92 mGrid = (GridView) view.findViewById(R.id.grid); 93 setupGrid(inflater); 94 getLoaderManager().initLoader(LOADER_SNAPSHOTS, null, this); 95 return view; 96 } 97 98 @Override 99 public void onDestroyView() { 100 super.onDestroyView(); 101 getLoaderManager().destroyLoader(LOADER_SNAPSHOTS); 102 if (mAdapter != null) { 103 mAdapter.changeCursor(null); 104 mAdapter = null; 105 } 106 } 107 108 void setupGrid(LayoutInflater inflater) { 109 View item = inflater.inflate(R.layout.snapshot_item, mGrid, false); 110 int mspec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 111 item.measure(mspec, mspec); 112 int width = item.getMeasuredWidth(); 113 mGrid.setColumnWidth(width); 114 mGrid.setOnItemClickListener(this); 115 mGrid.setOnCreateContextMenuListener(this); 116 } 117 118 @Override 119 public Loader<Cursor> onCreateLoader(int id, Bundle args) { 120 if (id == LOADER_SNAPSHOTS) { 121 return new CursorLoader(getActivity(), 122 Snapshots.CONTENT_URI, PROJECTION, 123 null, null, Snapshots.DATE_CREATED + " DESC"); 124 } 125 return null; 126 } 127 128 @Override 129 public void onLoadFinished(Loader<Cursor> loader, Cursor data) { 130 if (loader.getId() == LOADER_SNAPSHOTS) { 131 if (mAdapter == null) { 132 mAdapter = new SnapshotAdapter(getActivity(), data); 133 mGrid.setAdapter(mAdapter); 134 } else { 135 mAdapter.changeCursor(data); 136 } 137 boolean empty = mAdapter.isEmpty(); 138 mGrid.setVisibility(empty ? View.GONE : View.VISIBLE); 139 mEmpty.setVisibility(empty ? View.VISIBLE : View.GONE); 140 } 141 } 142 143 @Override 144 public void onLoaderReset(Loader<Cursor> loader) { 145 } 146 147 @Override 148 public void onCreateContextMenu(ContextMenu menu, View v, 149 ContextMenuInfo menuInfo) { 150 MenuInflater inflater = getActivity().getMenuInflater(); 151 inflater.inflate(R.menu.snapshots_context, menu); 152 // Create the header, re-use BookmarkItem (has the layout we want) 153 BookmarkItem header = new BookmarkItem(getActivity()); 154 AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo; 155 populateBookmarkItem(mAdapter.getItem(info.position), header); 156 menu.setHeaderView(header); 157 } 158 159 private void populateBookmarkItem(Cursor cursor, BookmarkItem item) { 160 item.setName(cursor.getString(SNAPSHOT_TITLE)); 161 item.setUrl(cursor.getString(SNAPSHOT_URL)); 162 item.setFavicon(getBitmap(cursor, SNAPSHOT_FAVICON)); 163 } 164 165 static Bitmap getBitmap(Cursor cursor, int columnIndex) { 166 byte[] data = cursor.getBlob(columnIndex); 167 if (data == null) { 168 return null; 169 } 170 return BitmapFactory.decodeByteArray(data, 0, data.length); 171 } 172 173 @Override 174 public boolean onContextItemSelected(MenuItem item) { 175 if (item.getItemId() == R.id.delete_context_menu_id) { 176 AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); 177 deleteSnapshot(info.id); 178 return true; 179 } 180 return super.onContextItemSelected(item); 181 } 182 183 void deleteSnapshot(long id) { 184 final Uri uri = ContentUris.withAppendedId(Snapshots.CONTENT_URI, id); 185 final ContentResolver cr = getActivity().getContentResolver(); 186 new Thread() { 187 @Override 188 public void run() { 189 cr.delete(uri, null, null); 190 } 191 }.start(); 192 193 } 194 195 @Override 196 public void onItemClick(AdapterView<?> parent, View view, int position, 197 long id) { 198 mCallback.openSnapshot(id); 199 } 200 201 private static class SnapshotAdapter extends ResourceCursorAdapter { 202 203 public SnapshotAdapter(Context context, Cursor c) { 204 super(context, R.layout.snapshot_item, c, 0); 205 } 206 207 @Override 208 public void bindView(View view, Context context, Cursor cursor) { 209 ImageView thumbnail = (ImageView) view.findViewById(R.id.thumb); 210 byte[] thumbBlob = cursor.getBlob(SNAPSHOT_THUMBNAIL); 211 if (thumbBlob == null) { 212 thumbnail.setImageResource(R.drawable.browser_thumbnail); 213 } else { 214 Bitmap thumbBitmap = BitmapFactory.decodeByteArray( 215 thumbBlob, 0, thumbBlob.length); 216 thumbnail.setImageBitmap(thumbBitmap); 217 } 218 TextView title = (TextView) view.findViewById(R.id.title); 219 title.setText(cursor.getString(SNAPSHOT_TITLE)); 220 TextView size = (TextView) view.findViewById(R.id.size); 221 int stateLen = cursor.getInt(SNAPSHOT_VIEWSTATE_LENGTH); 222 size.setText(String.format("%.2fMB", stateLen / 1024f / 1024f)); 223 long timestamp = cursor.getLong(SNAPSHOT_DATE_CREATED); 224 TextView date = (TextView) view.findViewById(R.id.date); 225 DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.SHORT); 226 date.setText(dateFormat.format(new Date(timestamp))); 227 } 228 229 @Override 230 public Cursor getItem(int position) { 231 return (Cursor) super.getItem(position); 232 } 233 } 234 235} 236