WallpaperChooserDialogFragment.java revision a6612cd45fc77e4f44fcdd1a74833a61bf440720
1/* 2 * Copyright (C) 2010 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.launcher2; 17 18import com.android.launcher.R; 19 20import android.app.Activity; 21import android.app.AlertDialog; 22import android.app.Dialog; 23import android.app.DialogFragment; 24import android.app.WallpaperManager; 25import android.content.Context; 26import android.content.DialogInterface; 27import android.content.res.Resources; 28import android.graphics.Bitmap; 29import android.graphics.BitmapFactory; 30import android.graphics.drawable.Drawable; 31import android.os.AsyncTask; 32import android.os.Bundle; 33import android.util.Log; 34import android.view.LayoutInflater; 35import android.view.View; 36import android.view.View.OnClickListener; 37import android.view.ViewGroup; 38import android.widget.AdapterView; 39import android.widget.BaseAdapter; 40import android.widget.FrameLayout; 41import android.widget.Gallery; 42import android.widget.GridView; 43import android.widget.ImageView; 44import android.widget.ListAdapter; 45import android.widget.SpinnerAdapter; 46 47import java.io.IOException; 48import java.util.ArrayList; 49 50public class WallpaperChooserDialogFragment extends DialogFragment implements 51 AdapterView.OnItemSelectedListener, AdapterView.OnItemClickListener { 52 53 private static final String TAG = "Launcher.WallpaperChooserDialogFragment"; 54 private static final String EMBEDDED_KEY = "com.android.launcher2." 55 + "WallpaperChooserDialogFragment.EMBEDDED_KEY"; 56 57 private boolean mEmbedded; 58 private ImageView mImageView = null; 59 private Bitmap mBitmap = null; 60 61 private ArrayList<Integer> mThumbs; 62 private ArrayList<Integer> mImages; 63 private WallpaperLoader mLoader; 64 65 public static WallpaperChooserDialogFragment newInstance() { 66 WallpaperChooserDialogFragment fragment = new WallpaperChooserDialogFragment(); 67 fragment.setCancelable(true); 68 return fragment; 69 } 70 71 @Override 72 public void onCreate(Bundle savedInstanceState) { 73 super.onCreate(savedInstanceState); 74 if (savedInstanceState != null && savedInstanceState.containsKey(EMBEDDED_KEY)) { 75 mEmbedded = savedInstanceState.getBoolean(EMBEDDED_KEY); 76 } else { 77 mEmbedded = isInLayout(); 78 } 79 } 80 81 @Override 82 public void onSaveInstanceState(Bundle outState) { 83 outState.putBoolean(EMBEDDED_KEY, mEmbedded); 84 } 85 86 @Override 87 public void onDestroy() { 88 super.onDestroy(); 89 90 if (mLoader != null && mLoader.getStatus() != WallpaperLoader.Status.FINISHED) { 91 mLoader.cancel(true); 92 mLoader = null; 93 } 94 } 95 96 @Override 97 public void onDismiss(DialogInterface dialog) { 98 super.onDismiss(dialog); 99 /* On orientation changes, the dialog is effectively "dismissed" so this is called 100 * when the activity is no longer associated with this dying dialog fragment. We 101 * should just safely ignore this case by checking if getActivity() returns null 102 */ 103 Activity activity = getActivity(); 104 if (activity != null) { 105 activity.finish(); 106 } 107 } 108 109 /* This will only be called when in XLarge mode, since this Fragment is invoked like 110 * a dialog in that mode 111 */ 112 @Override 113 public Dialog onCreateDialog(Bundle savedInstanceState) { 114 final View v = getActivity().getLayoutInflater().inflate( 115 R.layout.wallpaper_chooser, null, false); 116 117 GridView gridView = (GridView) v.findViewById(R.id.gallery); 118 gridView.setOnItemClickListener(this); 119 gridView.setAdapter(new ImageAdapter(getActivity())); 120 121 final int viewInset = 122 getResources().getDimensionPixelSize(R.dimen.alert_dialog_content_inset); 123 124 FrameLayout wallPaperList = (FrameLayout) v.findViewById(R.id.wallpaper_list); 125 AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 126 builder.setNegativeButton(R.string.wallpaper_cancel, null); 127 builder.setTitle(R.string.wallpaper_dialog_title); 128 builder.setView(wallPaperList, viewInset, viewInset, viewInset, viewInset); 129 return builder.create(); 130 } 131 132 @Override 133 public View onCreateView(LayoutInflater inflater, ViewGroup container, 134 Bundle savedInstanceState) { 135 findWallpapers(); 136 137 /* If this fragment is embedded in the layout of this activity, then we should 138 * generate a view to display. Otherwise, a dialog will be created in 139 * onCreateDialog() 140 */ 141 if (mEmbedded) { 142 View view = inflater.inflate(R.layout.wallpaper_chooser, container, false); 143 144 final Gallery gallery = (Gallery) view.findViewById(R.id.gallery); 145 gallery.setCallbackDuringFling(false); 146 gallery.setOnItemSelectedListener(this); 147 gallery.setAdapter(new ImageAdapter(getActivity())); 148 149 View setButton = view.findViewById(R.id.set); 150 setButton.setOnClickListener(new OnClickListener() { 151 @Override 152 public void onClick(View v) { 153 selectWallpaper(gallery.getSelectedItemPosition()); 154 } 155 }); 156 mImageView = (ImageView) view.findViewById(R.id.wallpaper); 157 return view; 158 } 159 return null; 160 } 161 162 private void selectWallpaper(int position) { 163 try { 164 WallpaperManager wpm = (WallpaperManager) getActivity().getSystemService( 165 Context.WALLPAPER_SERVICE); 166 wpm.setResource(mImages.get(position)); 167 Activity activity = getActivity(); 168 activity.setResult(Activity.RESULT_OK); 169 activity.finish(); 170 } catch (IOException e) { 171 Log.e(TAG, "Failed to set wallpaper: " + e); 172 } 173 } 174 175 // Click handler for the Dialog's GridView 176 @Override 177 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 178 selectWallpaper(position); 179 } 180 181 // Selection handler for the embedded Gallery view 182 @Override 183 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 184 if (mLoader != null && mLoader.getStatus() != WallpaperLoader.Status.FINISHED) { 185 mLoader.cancel(); 186 } 187 mLoader = (WallpaperLoader) new WallpaperLoader().execute(position); 188 } 189 190 @Override 191 public void onNothingSelected(AdapterView<?> parent) { 192 } 193 194 private void findWallpapers() { 195 mThumbs = new ArrayList<Integer>(24); 196 mImages = new ArrayList<Integer>(24); 197 198 final Resources resources = getResources(); 199 // Context.getPackageName() may return the "original" package name, 200 // com.android.launcher2; Resources needs the real package name, 201 // com.android.launcher. So we ask Resources for what it thinks the 202 // package name should be. 203 final String packageName = resources.getResourcePackageName(R.array.wallpapers); 204 205 addWallpapers(resources, packageName, R.array.wallpapers); 206 addWallpapers(resources, packageName, R.array.extra_wallpapers); 207 } 208 209 private void addWallpapers(Resources resources, String packageName, int list) { 210 final String[] extras = resources.getStringArray(list); 211 for (String extra : extras) { 212 int res = resources.getIdentifier(extra, "drawable", packageName); 213 if (res != 0) { 214 final int thumbRes = resources.getIdentifier(extra + "_small", 215 "drawable", packageName); 216 217 if (thumbRes != 0) { 218 mThumbs.add(thumbRes); 219 mImages.add(res); 220 // Log.d(TAG, "add: [" + packageName + "]: " + extra + " (" + res + ")"); 221 } 222 } 223 } 224 } 225 226 private class ImageAdapter extends BaseAdapter implements ListAdapter, SpinnerAdapter { 227 private LayoutInflater mLayoutInflater; 228 229 ImageAdapter(Activity activity) { 230 mLayoutInflater = activity.getLayoutInflater(); 231 } 232 233 public int getCount() { 234 return mThumbs.size(); 235 } 236 237 public Object getItem(int position) { 238 return position; 239 } 240 241 public long getItemId(int position) { 242 return position; 243 } 244 245 public View getView(int position, View convertView, ViewGroup parent) { 246 View view; 247 248 if (convertView == null) { 249 view = mLayoutInflater.inflate(R.layout.wallpaper_item, parent, false); 250 } else { 251 view = convertView; 252 } 253 254 ImageView image = (ImageView) view.findViewById(R.id.wallpaper_image); 255 256 int thumbRes = mThumbs.get(position); 257 image.setImageResource(thumbRes); 258 Drawable thumbDrawable = image.getDrawable(); 259 if (thumbDrawable != null) { 260 thumbDrawable.setDither(true); 261 } else { 262 Log.e(TAG, "Error decoding thumbnail resId=" + thumbRes + " for wallpaper #" 263 + position); 264 } 265 266 return view; 267 } 268 } 269 270 class WallpaperLoader extends AsyncTask<Integer, Void, Bitmap> { 271 BitmapFactory.Options mOptions; 272 273 WallpaperLoader() { 274 mOptions = new BitmapFactory.Options(); 275 mOptions.inDither = false; 276 mOptions.inPreferredConfig = Bitmap.Config.ARGB_8888; 277 } 278 279 @Override 280 protected Bitmap doInBackground(Integer... params) { 281 if (isCancelled()) return null; 282 try { 283 return BitmapFactory.decodeResource(getResources(), 284 mImages.get(params[0]), mOptions); 285 } catch (OutOfMemoryError e) { 286 return null; 287 } 288 } 289 290 @Override 291 protected void onPostExecute(Bitmap b) { 292 if (b == null) return; 293 294 if (!isCancelled() && !mOptions.mCancel) { 295 // Help the GC 296 if (mBitmap != null) { 297 mBitmap.recycle(); 298 } 299 300 // This should always be the case, but check anyways 301 final ImageView view = mImageView; 302 if (view != null) { 303 view.setImageBitmap(b); 304 305 mBitmap = b; 306 307 final Drawable drawable = view.getDrawable(); 308 drawable.setFilterBitmap(true); 309 drawable.setDither(true); 310 311 view.postInvalidate(); 312 } 313 314 mLoader = null; 315 } else { 316 b.recycle(); 317 } 318 } 319 320 void cancel() { 321 mOptions.requestCancelDecode(); 322 super.cancel(true); 323 } 324 } 325}