--- /dev/null
+package mobi.intuitit.android.widget;\r
+\r
+import java.io.IOException;\r
+import java.io.InputStream;\r
+import java.lang.ref.SoftReference;\r
+import java.util.ArrayList;\r
+import java.util.HashMap;\r
+import java.util.Map.Entry;\r
+\r
+import android.content.ContentResolver;\r
+import android.content.Context;\r
+import android.graphics.drawable.Drawable;\r
+import android.net.Uri;\r
+import android.util.Log;\r
+\r
+public class ListViewImageManager {\r
+\r
+ private static final String TAG = "ListViewImageManager";\r
+\r
+ private static final boolean LOGD = false;\r
+\r
+ private static ListViewImageManager instance;\r
+\r
+ public static ListViewImageManager getInstance() {\r
+ if (instance == null)\r
+ instance = new ListViewImageManager();\r
+ return instance;\r
+ }\r
+\r
+ private final HashMap<String, SoftReference<Drawable>> mCacheForImageByUri = new HashMap<String, SoftReference<Drawable>>();\r
+ private final HashMap<Integer, ArrayList<String>> mWidgetCacheUsageByUri = new HashMap<Integer, ArrayList<String>>();\r
+\r
+ private final HashMap<Integer, SoftReference<Drawable>> mCacheForImageById = new HashMap<Integer, SoftReference<Drawable>>();\r
+ private final HashMap<Integer, ArrayList<Integer>> mWidgetCacheUsageById = new HashMap<Integer, ArrayList<Integer>>();\r
+\r
+ public Drawable getImageFromUri(Context mContext, int widgetId, String imgUri) {\r
+ Drawable d = null;\r
+ if (mCacheForImageByUri.containsKey(imgUri) && mCacheForImageByUri.get(imgUri) != null) {\r
+ SoftReference<Drawable> ref = mCacheForImageByUri.get(imgUri);\r
+ if (ref != null) {\r
+ d = ref.get();\r
+ }\r
+ }\r
+\r
+ if (LOGD)\r
+ if (d != null)\r
+ Log.d(TAG, "image URI restored (width = " + d.getMinimumWidth() + " / weight = " + d.getMinimumHeight()\r
+ + ")");\r
+\r
+ if (d == null) {\r
+ Uri mUri = Uri.parse(imgUri);\r
+ String scheme = mUri.getScheme();\r
+ if (ContentResolver.SCHEME_ANDROID_RESOURCE.equals(scheme)) {\r
+ // try {\r
+ // // Load drawable through Resources, to get the source density\r
+ // information\r
+ // ContentResolver.OpenResourceIdResult r =\r
+ // mContext.getContentResolver().getResourceId(mUri);\r
+ // d = r.r.getDrawable(r.id);\r
+ // } catch (Exception e) {\r
+ // Log.w("ImageView", "Unable to open content: " + mUri, e);\r
+ // }\r
+ Log.w("ImageView", "Unable to open content: " + mUri);\r
+ } else if (ContentResolver.SCHEME_CONTENT.equals(scheme) || ContentResolver.SCHEME_FILE.equals(scheme)) {\r
+ try {\r
+ d = Drawable.createFromStream(mContext.getContentResolver().openInputStream(mUri), null);\r
+ } catch (Exception e) {\r
+ Log.w("ImageView", "Unable to open content: " + mUri, e);\r
+ }\r
+ } else {\r
+ d = Drawable.createFromPath(mUri.toString());\r
+ }\r
+\r
+ if (LOGD)\r
+ Log.d(TAG, "image URI decoded (width = " + d.getMinimumWidth() + " / weight = " + d.getMinimumHeight()\r
+ + ")");\r
+ mCacheForImageByUri.put(imgUri, new SoftReference<Drawable>(d));\r
+\r
+ // store image key usage\r
+ ArrayList<String> list = mWidgetCacheUsageByUri.get(widgetId);\r
+ if (list == null)\r
+ list = new ArrayList<String>();\r
+ list.add(imgUri);\r
+ mWidgetCacheUsageByUri.put(widgetId, list);\r
+\r
+ }\r
+ return d;\r
+ }\r
+\r
+ public Drawable getImageFromId(Context ctx, int widgetId, int imgId) {\r
+ Drawable drawable = null;\r
+ if (mCacheForImageById.containsKey(imgId) && mCacheForImageById.get(imgId) != null) {\r
+ SoftReference<Drawable> ref = mCacheForImageById.get(imgId);\r
+ if (ref != null) {\r
+ drawable = ref.get();\r
+ } else {\r
+ if (LOGD)\r
+ Log.d(TAG, "image ID missing !!!!!!!!!!");\r
+ }\r
+ }\r
+\r
+ if (LOGD)\r
+ if (drawable != null)\r
+ Log.d(TAG, "image ID restored");\r
+\r
+ if (drawable == null) {\r
+ if (LOGD)\r
+ Log.d(TAG, "image ID decoded");\r
+\r
+ InputStream rawResource = ctx.getResources().openRawResource( imgId);\r
+ try\r
+ {\r
+ drawable = Drawable.createFromStream(rawResource, ctx.getResources().getResourceName(imgId));\r
+ }\r
+ finally\r
+ {\r
+ try {\r
+ rawResource.close();\r
+ } catch (IOException e) {\r
+ e.printStackTrace();\r
+ }\r
+ }\r
+\r
+ mCacheForImageById.put(imgId, new SoftReference<Drawable>(drawable));\r
+\r
+ // store image key usage\r
+ ArrayList<Integer> list = mWidgetCacheUsageById.get(widgetId);\r
+ if (list == null)\r
+ list = new ArrayList<Integer>();\r
+ list.add(imgId);\r
+ mWidgetCacheUsageById.put(widgetId, list);\r
+\r
+ }\r
+ return drawable;\r
+ }\r
+\r
+ public void unbindDrawables() {\r
+\r
+ for (Entry<Integer, SoftReference<Drawable>> drawableEntry : mCacheForImageById.entrySet()) {\r
+ if ((drawableEntry != null) && (drawableEntry.getValue() != null)\r
+ && (drawableEntry.getValue().get() != null))\r
+ drawableEntry.getValue().get().setCallback(null);\r
+ }\r
+\r
+ for (Entry<String, SoftReference<Drawable>> drawableEntry : mCacheForImageByUri.entrySet()) {\r
+ if ((drawableEntry != null) && (drawableEntry.getValue() != null)\r
+ && (drawableEntry.getValue().get() != null))\r
+ drawableEntry.getValue().get().setCallback(null);\r
+ }\r
+ }\r
+\r
+ public void clearCache() {\r
+ mCacheForImageById.clear();\r
+ mCacheForImageByUri.clear();\r
+ }\r
+\r
+ public String clearCacheForWidget(Context ctx, int widgetId) {\r
+ Drawable drawable = null;\r
+ ArrayList<String> listByUri = mWidgetCacheUsageByUri.get(widgetId);\r
+ if (listByUri != null) {\r
+ for (String imgUri : listByUri) {\r
+ if (mCacheForImageByUri.containsKey(imgUri) && mCacheForImageByUri.get(imgUri) != null) {\r
+ SoftReference<Drawable> ref = mCacheForImageByUri.get(imgUri);\r
+ if (ref != null) {\r
+ drawable = ref.get();\r
+ if (drawable != null)\r
+ drawable.setCallback(null);\r
+ }\r
+ mCacheForImageByUri.remove(imgUri);\r
+ Log.d(TAG, "image URI removed from cache : " + imgUri);\r
+ }\r
+ }\r
+ }\r
+ mWidgetCacheUsageByUri.remove(widgetId);\r
+\r
+ ArrayList<Integer> listById = mWidgetCacheUsageById.get(widgetId);\r
+ if (listById != null) {\r
+ for (Integer imgId : listById) {\r
+ if (mCacheForImageById.containsKey(imgId) && mCacheForImageById.get(imgId) != null) {\r
+ SoftReference<Drawable> ref = mCacheForImageById.get(imgId);\r
+ if (ref != null) {\r
+ drawable = ref.get();\r
+ if (drawable != null)\r
+ drawable.setCallback(null);\r
+ }\r
+ mCacheForImageById.remove(imgId);\r
+ Log.d(TAG, "image ID removed from cache : " + imgId);\r
+ }\r
+ }\r
+ }\r
+ mWidgetCacheUsageById.remove(widgetId);\r
+\r
+ return null;\r
+ }\r
+\r
+}
\ No newline at end of file
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