Hey there,
So I tried doing a chat on my Application, and whenever the ChatApplication is openning the app crashes, I used as model the “Real Time Chat” from Backenless’s Code Generator.
I’m just asking for help because I really don’t understand the problem here.
Here’s my code:
package ninja.engineer.contacts2019;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Html;
import android.util.Log;
import android.view.KeyEvent;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
import com.backendless.Backendless;
import com.backendless.async.callback.AsyncCallback;
import com.backendless.exceptions.BackendlessFault;
import com.backendless.messaging.MessageStatus;
import com.backendless.rt.messaging.Channel;
public class ChatActivity extends AppCompatActivity {
public static final String TAG = “ChatTest”;
private EditText message;
private TextView messages;
private Channel channel;
private String color = ColorPicker.next();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
message = findViewById(R.id.message);
messages = findViewById(R.id.messages);
final String name = getIntent().getStringExtra(“name”);
channel = Backendless.Messaging.subscribe(ApplicationClass.DEFAULT_CHANNEL);
channel.addJoinListener(new AsyncCallback<Void>() {
@Override
public void handleResponse(Void response) {
Backendless.Messaging.publish(ApplicationClass.DEFAULT_CHANNEL,
wrapToColor(name) + " joined the chat",
new AsyncCallback<MessageStatus>()
{
@Override
public void handleResponse(MessageStatus response) {
Log.d(TAG, "Sent joined " + response);
}
@Override
public void handleFault(BackendlessFault fault) {
ChatActivity.this.handleFault(fault);
}
});
}
@Override
public void handleFault(BackendlessFault fault) {
ChatActivity.this.handleFault(fault);
}
});
channel.addMessageListener(new AsyncCallback<String>() {
@Override
public void handleResponse(String response) {
messages.append(Html.fromHtml("<br/>" + response));
}
@Override
public void handleFault(BackendlessFault fault) {
ChatActivity.this.handleFault(fault);
}
});
message.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
boolean handled = false;
if (actionId == EditorInfo.IME_ACTION_SEND || event.getKeyCode() == KeyEvent.KEYCODE_ENTER){
message.setEnabled(false);
Backendless.Messaging.publish(ApplicationClass.DEFAULT_CHANNEL, wrapToColor("[" + name + “]”) +
": " + message.getText().toString(), new AsyncCallback<MessageStatus>() {
@Override
public void handleResponse(MessageStatus response) {
Log.d(TAG, “Sent message " + response);
message.setText(”", TextView.BufferType.EDITABLE);
message.setEnabled(true);
}
@Override
public void handleFault(BackendlessFault fault) {
message.setEnabled(true);
}
});
handled = true;
}
return handled;
}
});
}
private void handleFault(BackendlessFault fault) {
Log.e(TAG, fault.toString());
}
private String wrapToColor(String value) {
return “<font color=’” + color + “’>” + value + “</font>”;
}
@Override
protected void onDestroy() {
super.onDestroy();
if (channel != null)
channel.leave();
}
}
Thank you! Any help is appreciated 
