Refactor ContactPhotoFactory to handle changing local contact URIs.

src/org/thoughtcrime/securesms/contacts/ContactPhotoFactory.java

@@ -0,0 +1,73 @@
+package org.thoughtcrime.securesms.contacts;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+import android.provider.ContactsContract;
+import android.provider.ContactsContract.Contacts;
+
+import org.thoughtcrime.securesms.R;
+import org.thoughtcrime.securesms.util.LRUCache;
+
+import java.io.InputStream;
+import java.util.Collections;
+import java.util.Map;
+
+public class ContactPhotoFactory {
+
+  private static final Object defaultPhotoLock = new Object();
+
+  private static Bitmap defaultContactPhoto;
+  private static final Map<Uri,Bitmap> localUserContactPhotoCache =
+      Collections.synchronizedMap(new LRUCache<Uri,Bitmap>(2));
+
+  private static final String[] CONTENT_URI_PROJECTION = new String[] {
+    ContactsContract.Contacts._ID,
+    ContactsContract.Contacts.DISPLAY_NAME,
+    ContactsContract.Contacts.LOOKUP_KEY
+  };
+
+  public static Bitmap getDefaultContactPhoto(Context context) {
+    synchronized (defaultPhotoLock) {
+      if (defaultContactPhoto == null)
+        defaultContactPhoto =  BitmapFactory.decodeResource(context.getResources(),
+                                                            R.drawable.ic_contact_picture);
+      return defaultContactPhoto;
+    }
+  }
+
+  public static Bitmap getLocalUserContactPhoto(Context context, Uri uri) {
+    if (uri == null) return getDefaultContactPhoto(context);
+
+    Bitmap contactPhoto = localUserContactPhotoCache.get(uri);
+
+    if (contactPhoto == null) {
+      Cursor cursor = context.getContentResolver().query(uri, CONTENT_URI_PROJECTION,
+                                                         null, null, null);
+
+      if (cursor != null && cursor.moveToFirst()) {
+        contactPhoto = getContactPhoto(context, Uri.withAppendedPath(Contacts.CONTENT_URI,
+                                       cursor.getLong(0) + ""));
+      } else {
+        contactPhoto = getDefaultContactPhoto(context);
+      }
+
+      localUserContactPhotoCache.put(uri, contactPhoto);
+    }
+
+    return contactPhoto;
+  }
+
+  public static void clearCache() {
+    localUserContactPhotoCache.clear();
+  }
+
+  private static Bitmap getContactPhoto(Context context, Uri uri) {
+    InputStream inputStream = ContactsContract.Contacts.openContactPhotoInputStream(context.getContentResolver(), uri);
+
+    if (inputStream == null) return ContactPhotoFactory.getDefaultContactPhoto(context);
+    else                     return BitmapFactory.decodeStream(inputStream);
+  }
+}