optimize string operations a bit

src/eu/siacs/conversations/crypto/PgpEngine.java

@@ -106,8 +106,8 @@ public class PgpEngine {
 									outputFile.getAbsolutePath(), options);
 							int imageHeight = options.outHeight;
 							int imageWidth = options.outWidth;
-							message.setBody("" + outputFile.getSize() + ","
+							message.setBody(Long.toString(outputFile.getSize()) + ','
-									+ imageWidth + "," + imageHeight);
+									+ imageWidth + ',' + imageHeight);
 							message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 							PgpEngine.this.mXmppConnectionService
 									.updateMessage(message);

src/eu/siacs/conversations/entities/Message.java

@@ -150,13 +150,13 @@ public class Message extends AbstractEntity {
 
 	public String getReadableBody(Context context) {
 		if ((encryption == ENCRYPTION_PGP) && (type == TYPE_TEXT)) {
-			return "" + context.getText(R.string.encrypted_message_received);
+			return context.getText(R.string.encrypted_message_received).toString();
 		} else if ((encryption == ENCRYPTION_OTR) && (type == TYPE_IMAGE)) {
-			return "" + context.getText(R.string.encrypted_image_received);
+			return context.getText(R.string.encrypted_image_received).toString();
 		} else if (encryption == ENCRYPTION_DECRYPTION_FAILED) {
-			return "" + context.getText(R.string.decryption_failed);
+			return context.getText(R.string.decryption_failed).toString();
 		} else if (type == TYPE_IMAGE) {
-			return "" + context.getText(R.string.image_file);
+			return context.getText(R.string.image_file).toString();
 		} else {
 			return body.trim();
 		}

src/eu/siacs/conversations/persistance/DatabaseBackend.java

@@ -137,7 +137,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 	public CopyOnWriteArrayList<Conversation> getConversations(int status) {
 		CopyOnWriteArrayList<Conversation> list = new CopyOnWriteArrayList<Conversation>();
 		SQLiteDatabase db = this.getReadableDatabase();
-		String[] selectionArgs = { "" + status };
+		String[] selectionArgs = { Integer.toString(status) };
 		Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
 				+ " where " + Conversation.STATUS + " = ? order by "
 				+ Conversation.CREATED + " desc", selectionArgs);
@@ -163,7 +163,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 					+ "=?", selectionArgs, null, null, Message.TIME_SENT
 					+ " DESC", String.valueOf(limit));
 		} else {
-			String[] selectionArgs = { conversation.getUuid(), "" + timestamp };
+			String[] selectionArgs = { conversation.getUuid(), Long.toString(timestamp) };
 			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 					+ "=? and " + Message.TIME_SENT + "<?", selectionArgs,
 					null, null, Message.TIME_SENT + " DESC",

src/eu/siacs/conversations/persistance/FileBackend.java

@@ -180,7 +180,7 @@ public class FileBackend {
 			long size = file.getSize();
 			int width = scalledBitmap.getWidth();
 			int height = scalledBitmap.getHeight();
-			message.setBody("" + size + "," + width + "," + height);
+			message.setBody(Long.toString(size) + ',' + width + ',' + height);
 			return file;
 		} catch (FileNotFoundException e) {
 			throw new ImageCopyException(R.string.error_file_not_found);

src/eu/siacs/conversations/xml/Element.java

@@ -146,10 +146,10 @@ public class Element {
 	}
 
 	public void setAttribute(String name, long value) {
-		this.setAttribute(name, "" + value);
+		this.setAttribute(name, Long.toString(value));
 	}
 
 	public void setAttribute(String name, int value) {
-		this.setAttribute(name, "" + value);
+		this.setAttribute(name, Integer.toString(value));
 	}
 }

src/eu/siacs/conversations/xmpp/jingle/JingleCandidate.java

@@ -117,9 +117,9 @@ public class JingleCandidate {
 		Element element = new Element("candidate");
 		element.setAttribute("cid", this.getCid());
 		element.setAttribute("host", this.getHost());
-		element.setAttribute("port", "" + this.getPort());
+		element.setAttribute("port", Integer.toString(this.getPort()));
 		element.setAttribute("jid", this.getJid());
-		element.setAttribute("priority", "" + this.getPriority());
+		element.setAttribute("priority", Integer.toString(this.getPriority()));
 		if (this.getType() == TYPE_DIRECT) {
 			element.setAttribute("type", "direct");
 		} else if (this.getType() == TYPE_PROXY) {

src/eu/siacs/conversations/xmpp/jingle/JingleConnection.java

@@ -95,7 +95,7 @@ public class JingleConnection {
 				BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 				int imageHeight = options.outHeight;
 				int imageWidth = options.outWidth;
-				message.setBody("" + file.getSize() + "," + imageWidth + ","
+				message.setBody(Long.toString(file.getSize()) + ',' + imageWidth + ','
 						+ imageHeight);
 				mXmppConnectionService.databaseBackend.createMessage(message);
 				mXmppConnectionService.markMessage(message,
@@ -302,7 +302,7 @@ public class JingleConnection {
 				}
 				if (supportedFile) {
 					long size = Long.parseLong(fileSize.getContent());
-					message.setBody("" + size);
+					message.setBody(Long.toString(size));
 					conversation.getMessages().add(message);
 					if (size <= this.mJingleConnectionManager
 							.getAutoAcceptFileSize()) {
@@ -630,7 +630,7 @@ public class JingleConnection {
 		this.transportId = this.mJingleConnectionManager.nextRandomId();
 		content.setTransportId(this.transportId);
 		content.ibbTransport().setAttribute("block-size",
-				"" + this.ibbBlockSize);
+				Integer.toString(this.ibbBlockSize));
 		packet.setContent(content);
 		this.sendJinglePacket(packet);
 	}
@@ -652,7 +652,7 @@ public class JingleConnection {
 		Content content = new Content("initiator", "a-file-offer");
 		content.setTransportId(this.transportId);
 		content.ibbTransport().setAttribute("block-size",
-				"" + this.ibbBlockSize);
+				Integer.toString(this.ibbBlockSize));
 		answer.setContent(content);
 		this.sendJinglePacket(answer);
 		return true;

src/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java

@@ -59,7 +59,7 @@ public class JingleInbandTransport extends JingleTransport {
 		Element open = iq.addChild("open", "http://jabber.org/protocol/ibb");
 		open.setAttribute("sid", this.sessionId);
 		open.setAttribute("stanza", "iq");
-		open.setAttribute("block-size", "" + this.blockSize);
+		open.setAttribute("block-size", Integer.toString(this.blockSize));
 
 		this.account.getXmppConnection().sendIqPacket(iq,
 				new OnIqPacketReceived() {
@@ -134,8 +134,8 @@ public class JingleInbandTransport extends JingleTransport {
 				iq.setTo(this.counterpart);
 				Element data = iq.addChild("data",
 						"http://jabber.org/protocol/ibb");
-				data.setAttribute("seq", "" + this.seq);
+				data.setAttribute("seq", Integer.toString(this.seq));
-				data.setAttribute("block-size", "" + this.blockSize);
+				data.setAttribute("block-size", Integer.toString(this.blockSize));
 				data.setAttribute("sid", this.sessionId);
 				data.setContent(base64);
 				this.account.getXmppConnection().sendIqPacket(iq,

src/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java

@@ -58,10 +58,10 @@ public class JingleSocks5Transport extends JingleTransport {
 					byte[] reply = new byte[2];
 					outputStream.write(login);
 					inputStream.read(reply);
-					if (Arrays.equals(reply, expectedReply)) {
+					final String connect = Character.toString('\u0005') + '\u0001' + '\u0000'
-						String connect = "" + '\u0005' + '\u0001' + '\u0000'
 							+ '\u0003' + '\u0028' + destination + '\u0000'
 							+ '\u0000';
+					if (Arrays.equals(reply, expectedReply)) {
 						outputStream.write(connect.getBytes());
 						byte[] result = new byte[2];
 						inputStream.read(result);

src/eu/siacs/conversations/xmpp/jingle/stanzas/Content.java

@@ -30,7 +30,7 @@ public class Content extends Element {
 				"urn:xmpp:jingle:apps:file-transfer:3");
 		Element offer = description.addChild("offer");
 		Element file = offer.addChild("file");
-		file.addChild("size").setContent("" + actualFile.getSize());
+		file.addChild("size").setContent(Long.toString(actualFile.getSize()));
 		if (otr) {
 			file.addChild("name").setContent(actualFile.getName() + ".otr");
 		} else {

src/eu/siacs/conversations/xmpp/stanzas/streammgmt/AckPacket.java

@@ -7,7 +7,7 @@ public class AckPacket extends AbstractStanza {
 	public AckPacket(int sequence, int smVersion) {
 		super("a");
 		this.setAttribute("xmlns", "urn:xmpp:sm:" + smVersion);
-		this.setAttribute("h", "" + sequence);
+		this.setAttribute("h", Integer.toString(sequence));
 	}
 
 }

src/eu/siacs/conversations/xmpp/stanzas/streammgmt/ResumePacket.java

@@ -8,7 +8,7 @@ public class ResumePacket extends AbstractStanza {
 		super("resume");
 		this.setAttribute("xmlns", "urn:xmpp:sm:" + smVersion);
 		this.setAttribute("previd", id);
-		this.setAttribute("h", "" + sequence);
+		this.setAttribute("h", Integer.toString(sequence));
 	}
 
 }