nl.meta.mobile.chat.MobileChatActivity.java Source code

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Here is the source code for nl.meta.mobile.chat.MobileChatActivity.java

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/*
Mobile Chat (ff-mobile-chat) is a cross platform
(Android, iOS, Windows Phone 8, web) chat supported by NodeJS websockets.
<https://github.com/TerryWahl/ff-mobile-chat>
    
Copyright (C) 2013-2014 Terry Wahl & Marco Jacobs
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
    
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package nl.meta.mobile.chat;

import java.net.URI;
import java.util.Arrays;
import java.util.List;

import org.apache.http.message.BasicNameValuePair;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;

import com.codebutler.android_websockets.WebSocketClient;

public class MobileChatActivity extends Activity {

    // Fields
    private TextView tvConnectStatus;
    private EditText etName, etMessage;
    private ScrollView svMessages;
    private LinearLayout llMessages;
    private Button btnSend;

    // This library requires a raw websocket url.
    // For NodeJS with SockJS this should be
    // "ws://YOUR.URL:PORT/IDENTIFIER/websocket"
    private final String CONSTANT_WEBSOCKETS_URL = "ws://your.site.nl:6975/mobilechat/websocket";
    private final String CONSTANT_NO_NAME_ERROR_MSG = "Please put you name in box above!";

    private WebSocketClient mClient;
    private boolean connected = false;
    private Handler mHandler;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_mobile_chat);

        // Declares
        tvConnectStatus = (TextView) findViewById(R.id.tvConnected);
        etName = (EditText) findViewById(R.id.etName);
        llMessages = (LinearLayout) findViewById(R.id.llMessages);
        svMessages = (ScrollView) findViewById(R.id.svMessages);
        etMessage = (EditText) findViewById(R.id.etMessage);
        btnSend = (Button) findViewById(R.id.btnSend);

        mHandler = new Handler();

        // Update connection label
        setConnectionLabel();

        // Send message button handler
        btnSend.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // check connection
                if (connected) {
                    // check name not null
                    if (!etName.getText().toString().equals("")) {
                        if (!etMessage.getText().toString().equals("")) {
                            // Send message
                            mClient.send(etName.getText().toString() + ": " + etMessage.getText().toString());
                            etMessage.setText("");
                        }
                    } else {
                        // Name is empty
                        addMessageToChat(CONSTANT_NO_NAME_ERROR_MSG);
                    }
                }
            }
        });

        // Websockets setup
        List<BasicNameValuePair> extraHeaders = Arrays.asList(new BasicNameValuePair("Cookie", "session=abcd"));
        mClient = new WebSocketClient(URI.create(CONSTANT_WEBSOCKETS_URL), new WebSocketClient.Listener() {

            @Override
            public void onMessage(byte[] data) {
                // Byte array not used
                System.out.println(data);
            }

            @Override
            public void onMessage(String message) {
                // Process message - Handler required because it's on the UI
                // thread.
                final String messageForHandler = message;
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        addMessageToChat(messageForHandler);
                    }
                });
            }

            @Override
            public void onError(Exception error) {
                // Should handle these errors...
                error.getStackTrace();
                Thread.currentThread().getStackTrace();
            }

            @Override
            public void onDisconnect(int code, String reason) {
                connected = false;
                // This is already on a handler
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        setConnectionLabel();
                    }
                });

            }

            @Override
            public void onConnect() {
                connected = true;
                // This is already on a handler
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        setConnectionLabel();
                    }
                });
            }
        }, extraHeaders);

        // Tell the client to connect
        mClient.connect();
    }

    /**
     * Depending on the connection status this method will set the
     * tvConnectStatus
     */
    private void setConnectionLabel() {
        if (connected) {
            tvConnectStatus.setText("Connected!");
            tvConnectStatus.setTextColor(getResources().getColor(R.color.light_green));
        } else {
            tvConnectStatus.setText("Disconnected.");
            tvConnectStatus.setTextColor(getResources().getColor(R.color.red));
        }
    }

    /**
     * This method adds a new TextView with the message to the chatbox.
     * 
     * @param message
     *            The message to be added.
     */
    private void addMessageToChat(String message) {
        TextView tv = new TextView(this);
        tv.setText(message);
        llMessages.addView(tv);
        // Scroll to the end
        svMessages.fullScroll(View.FOCUS_DOWN);
    }
}