WallpaperChooserDialogFragment.java revision 2a898a0ac54beab0ae56c97eeccc017b02d61453
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.Gallery; 41import android.widget.GridView; 42import android.widget.ImageView; 43import android.widget.ListAdapter; 44import android.widget.SpinnerAdapter; 45 46import java.io.IOException; 47import java.util.ArrayList; 48 49public class WallpaperChooserDialogFragment extends DialogFragment implements 50 AdapterView.OnItemSelectedListener, AdapterView.OnItemClickListener { 51 52 private static final String TAG = "Launcher.WallpaperChooserDialogFragment"; 53 private static final String EMBEDDED_KEY = "com.android.launcher2." 54 + "WallpaperChooserDialogFragment.EMBEDDED_KEY"; 55 56 private boolean mEmbedded; 57 private ImageView mImageView = null; 58 private Bitmap mBitmap = null; 59 60 private ArrayList<Integer> mThumbs; 61 private ArrayList<Integer> mImages; 62 private WallpaperLoader mLoader; 63 64 public static WallpaperChooserDialogFragment newInstance() { 65 WallpaperChooserDialogFragment fragment = new WallpaperChooserDialogFragment(); 66 fragment.setCancelable(true); 67 return fragment; 68 } 69 70 @Override 71 public void onCreate(Bundle savedInstanceState) { 72 super.onCreate(savedInstanceState); 73 if (savedInstanceState != null && savedInstanceState.containsKey(EMBEDDED_KEY)) { 74 mEmbedded = savedInstanceState.getBoolean(EMBEDDED_KEY); 75 } else { 76 mEmbedded = isInLayout(); 77 } 78 } 79 80 @Override 81 public void onSaveInstanceState(Bundle outState) { 82 outState.putBoolean(EMBEDDED_KEY, mEmbedded); 83 } 84 85 @Override 86 public void onDestroy() { 87 super.onDestroy(); 88 89 if (mLoader != null && mLoader.getStatus() != WallpaperLoader.Status.FINISHED) { 90 mLoader.cancel(true); 91 mLoader = null; 92 } 93 } 94 95 @Override 96 public void onDismiss(DialogInterface dialog) { 97 super.onDismiss(dialog); 98 /* On orientation changes, the dialog is effectively "dismissed" so this is called 99 * when the activity is no longer associated with this dying dialog fragment. We 100 * should just safely ignore this case by checking if getActivity() returns null 101 */ 102 Activity activity = getActivity(); 103 if (activity != null) { 104 activity.finish(); 105 } 106 } 107 108 /* This will only be called when in XLarge mode, since this Fragment is invoked like 109 * a dialog in that mode 110 */ 111 @Override 112 public Dialog onCreateDialog(Bundle savedInstanceState) { 113 final View v = getActivity().getLayoutInflater().inflate( 114 R.layout.wallpaper_chooser, null, false); 115 116 GridView gridView = (GridView) v.findViewById(R.id.gallery); 117 gridView.setOnItemClickListener(this); 118 gridView.setAdapter(new ImageAdapter(getActivity())); 119 120 final int viewInset = 121 getResources().getDimensionPixelSize(R.dimen.alert_dialog_content_inset); 122 123 AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 124 builder.setNegativeButton(R.string.wallpaper_cancel, null); 125 builder.setTitle(R.string.wallpaper_dialog_title); 126 builder.setView(gridView, viewInset, viewInset, viewInset, viewInset); 127 return builder.create(); 128 } 129 130 @Override 131 public View onCreateView(LayoutInflater inflater, ViewGroup container, 132 Bundle savedInstanceState) { 133 findWallpapers(); 134 135 /* If this fragment is embedded in the layout of this activity, then we should 136 * generate a view to display. Otherwise, a dialog will be created in 137 * onCreateDialog() 138 */ 139 if (mEmbedded) { 140 View view = inflater.inflate(R.layout.wallpaper_chooser, container, false); 141 142 final Gallery gallery = (Gallery) view.findViewById(R.id.gallery); 143 gallery.setCallbackDuringFling(false); 144 gallery.setOnItemSelectedListener(this); 145 gallery.setAdapter(new ImageAdapter(getActivity())); 146 147 View setButton = view.findViewById(R.id.set); 148 setButton.setOnClickListener(new OnClickListener() { 149 @Override 150 public void onClick(View v) { 151 selectWallpaper(gallery.getSelectedItemPosition()); 152 } 153 }); 154 mImageView = (ImageView) view.findViewById(R.id.wallpaper); 155 return view; 156 } 157 return null; 158 } 159 160 private void selectWallpaper(int position) { 161 try { 162 WallpaperManager wpm = (WallpaperManager) getActivity().getSystemService( 163 Context.WALLPAPER_SERVICE); 164 wpm.setResource(mImages.get(position)); 165 Activity activity = getActivity(); 166 activity.setResult(Activity.RESULT_OK); 167 activity.finish(); 168 } catch (IOException e) { 169 Log.e(TAG, "Failed to set wallpaper: " + e); 170 } 171 } 172 173 // Click handler for the Dialog's GridView 174 @Override 175 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 176 selectWallpaper(position); 177 } 178 179 // Selection handler for the embedded Gallery view 180 @Override 181 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 182 if (mLoader != null && mLoader.getStatus() != WallpaperLoader.Status.FINISHED) { 183 mLoader.cancel(); 184 } 185 mLoader = (WallpaperLoader) new WallpaperLoader().execute(position); 186 } 187 188 @Override 189 public void onNothingSelected(AdapterView<?> parent) { 190 } 191 192 private void findWallpapers() { 193 mThumbs = new ArrayList<Integer>(24); 194 mImages = new ArrayList<Integer>(24); 195 196 final Resources resources = getResources(); 197 // Context.getPackageName() may return the "original" package name, 198 // com.android.launcher2; Resources needs the real package name, 199 // com.android.launcher. So we ask Resources for what it thinks the 200 // package name should be. 201 final String packageName = resources.getResourcePackageName(R.array.wallpapers); 202 203 addWallpapers(resources, packageName, R.array.wallpapers); 204 addWallpapers(resources, packageName, R.array.extra_wallpapers); 205 } 206 207 private void addWallpapers(Resources resources, String packageName, int list) { 208 final String[] extras = resources.getStringArray(list); 209 for (String extra : extras) { 210 int res = resources.getIdentifier(extra, "drawable", packageName); 211 if (res != 0) { 212 final int thumbRes = resources.getIdentifier(extra + "_small", 213 "drawable", packageName); 214 215 if (thumbRes != 0) { 216 mThumbs.add(thumbRes); 217 mImages.add(res); 218 // Log.d(TAG, "add: [" + packageName + "]: " + extra + " (" + res + ")"); 219 } 220 } 221 } 222 } 223 224 private class ImageAdapter extends BaseAdapter implements ListAdapter, SpinnerAdapter { 225 private LayoutInflater mLayoutInflater; 226 227 ImageAdapter(Activity activity) { 228 mLayoutInflater = activity.getLayoutInflater(); 229 } 230 231 public int getCount() { 232 return mThumbs.size(); 233 } 234 235 public Object getItem(int position) { 236 return position; 237 } 238 239 public long getItemId(int position) { 240 return position; 241 } 242 243 public View getView(int position, View convertView, ViewGroup parent) { 244 ImageView image; 245 246 if (convertView == null) { 247 image = (ImageView) mLayoutInflater.inflate(R.layout.wallpaper_item, parent, false); 248 } else { 249 image = (ImageView) convertView; 250 } 251 252 int thumbRes = mThumbs.get(position); 253 image.setImageResource(thumbRes); 254 Drawable thumbDrawable = image.getDrawable(); 255 if (thumbDrawable != null) { 256 thumbDrawable.setDither(true); 257 } else { 258 Log.e(TAG, "Error decoding thumbnail resId=" + thumbRes + " for wallpaper #" 259 + position); 260 } 261 262 return image; 263 } 264 } 265 266 class WallpaperLoader extends AsyncTask<Integer, Void, Bitmap> { 267 BitmapFactory.Options mOptions; 268 269 WallpaperLoader() { 270 mOptions = new BitmapFactory.Options(); 271 mOptions.inDither = false; 272 mOptions.inPreferredConfig = Bitmap.Config.ARGB_8888; 273 } 274 275 @Override 276 protected Bitmap doInBackground(Integer... params) { 277 if (isCancelled()) return null; 278 try { 279 return BitmapFactory.decodeResource(getResources(), 280 mImages.get(params[0]), mOptions); 281 } catch (OutOfMemoryError e) { 282 return null; 283 } 284 } 285 286 @Override 287 protected void onPostExecute(Bitmap b) { 288 if (b == null) return; 289 290 if (!isCancelled() && !mOptions.mCancel) { 291 // Help the GC 292 if (mBitmap != null) { 293 mBitmap.recycle(); 294 } 295 296 // This should always be the case, but check anyways 297 final ImageView view = mImageView; 298 if (view != null) { 299 view.setImageBitmap(b); 300 301 mBitmap = b; 302 303 final Drawable drawable = view.getDrawable(); 304 drawable.setFilterBitmap(true); 305 drawable.setDither(true); 306 307 view.postInvalidate(); 308 } 309 310 mLoader = null; 311 } else { 312 b.recycle(); 313 } 314 } 315 316 void cancel() { 317 mOptions.requestCancelDecode(); 318 super.cancel(true); 319 } 320 } 321}