reworked handeling of system contacts

src/main/java/eu/siacs/conversations/entities/Contact.java

@@ -237,8 +237,16 @@ public class Contact implements ListItem, Blockable {
 		return this.presences.getMostAvailableStatus();
 	}
 
-	public void setPhotoUri(String uri) {
+	public boolean setPhotoUri(String uri) {
+		if (uri != null && !uri.equals(this.photoUri)) {
 			this.photoUri = uri;
+			return true;
+		} else if (this.photoUri != null && uri == null) {
+			this.photoUri = null;
+			return true;
+		} else {
+			return false;
+		}
 	}
 
 	public void setServerName(String serverName) {

src/main/java/eu/siacs/conversations/entities/Roster.java

@@ -2,6 +2,7 @@ package eu.siacs.conversations.entities;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 
 import eu.siacs.conversations.xmpp.jid.Jid;
@@ -55,13 +56,16 @@ public class Roster {
 		}
 	}
 
-	public void clearSystemAccounts() {
-		for (Contact contact : getContacts()) {
-			contact.setPhotoUri(null);
-			contact.setSystemName(null);
-			contact.setSystemAccount(null);
+	public List<Contact> getWithSystemAccounts() {
+		List<Contact> with = getContacts();
+		for(Iterator<Contact> iterator = with.iterator(); iterator.hasNext();) {
+			Contact contact = iterator.next();
+			if (contact.getSystemAccount() == null) {
+				iterator.remove();
 			}
 		}
+		return with;
+	}
 
 	public List<Contact> getContacts() {
 		synchronized (this.contacts) {

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

@@ -927,7 +927,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			public void run() {
 				Log.d(Config.LOGTAG,"start merging phone contacts with roster");
 				for (Account account : accounts) {
-					account.getRoster().clearSystemAccounts();
+					List<Contact> withSystemAccounts = account.getRoster().getWithSystemAccounts();
 					for (Bundle phoneContact : phoneContacts) {
 						if (Thread.interrupted()) {
 							Log.d(Config.LOGTAG,"interrupted merging phone contacts");
@@ -944,9 +944,18 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 							+ "#"
 							+ phoneContact.getString("lookup");
 						contact.setSystemAccount(systemAccount);
-						contact.setPhotoUri(phoneContact.getString("photouri"));
+						if (contact.setPhotoUri(phoneContact.getString("photouri"))) {
 							getAvatarService().clear(contact);
+						}
 						contact.setSystemName(phoneContact.getString("displayname"));
+						withSystemAccounts.remove(contact);
+					}
+					for(Contact contact : withSystemAccounts) {
+						contact.setSystemAccount(null);
+						contact.setSystemName(null);
+						if (contact.setPhotoUri(null)) {
+							getAvatarService().clear(contact);
+						}
 					}
 				}
 				Log.d(Config.LOGTAG,"finished merging phone contacts");

src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java

@@ -10,6 +10,7 @@ import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.provider.ContactsContract;
 import android.provider.ContactsContract.CommonDataKinds;
 import android.provider.ContactsContract.Contacts;
 import android.provider.ContactsContract.Intents;
@@ -126,6 +127,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 
 		@Override
 		public void onClick(View v) {
+			if (contact.getSystemAccount() == null) {
 				AlertDialog.Builder builder = new AlertDialog.Builder(
 						ContactDetailsActivity.this);
 				builder.setTitle(getString(R.string.action_add_phone_book));
@@ -134,6 +136,14 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 				builder.setNegativeButton(getString(R.string.cancel), null);
 				builder.setPositiveButton(getString(R.string.add), addToPhonebook);
 				builder.create().show();
+			} else {
+					String[] systemAccount = contact.getSystemAccount().split("#");
+					long id = Long.parseLong(systemAccount[0]);
+					Uri uri = ContactsContract.Contacts.getLookupUri(id, systemAccount[1]);
+					Intent intent = new Intent(Intent.ACTION_VIEW);
+					intent.setData(uri);
+					startActivity(intent);
+			}
 		}
 	};
 
@@ -340,12 +350,9 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		} else {
 			contactJidTv.setText(contact.getJid().toString());
 		}
-		accountJidTv.setText(getString(R.string.using_account, contact
-					.getAccount().getJid().toBareJid()));
-		prepareContactBadge(badge, contact);
-		if (contact.getSystemAccount() == null) {
-			badge.setOnClickListener(onBadgeClick);
-		}
+		accountJidTv.setText(getString(R.string.using_account, contact.getAccount().getJid().toBareJid()));
+		badge.setImageBitmap(avatarService().get(contact, getPixel(72)));
+		badge.setOnClickListener(this.onBadgeClick);
 
 		keys.removeAllViews();
 		boolean hasKeys = false;
@@ -419,15 +426,6 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		}
 	}
 
-	private void prepareContactBadge(QuickContactBadge badge, Contact contact) {
-		if (contact.getSystemAccount() != null) {
-			String[] systemAccount = contact.getSystemAccount().split("#");
-			long id = Long.parseLong(systemAccount[0]);
-			badge.assignContactUri(Contacts.getLookupUri(id, systemAccount[1]));
-		}
-		badge.setImageBitmap(avatarService().get(contact, getPixel(72)));
-	}
-
 	protected void confirmToDeleteFingerprint(final String fingerprint) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(R.string.delete_fingerprint);