我正在按照本教程构建消息传递应用程序:http://sinch.github.io/android-messaging-tutorial/
一切都很好,直到我在MessageActivity上看到该错误
包com.sinch.messagingtutorialskeleton;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.example.messagingtutorialskeleton.R;
import com.sinch.android.rtc.PushPair;
import com.sinch.android.rtc.messaging.Message;
import com.sinch.android.rtc.messaging.MessageClient;
import com.sinch.android.rtc.messaging.MessageClientListener;
import com.sinch.android.rtc.messaging.MessageDeliveryInfo;
import com.sinch.android.rtc.messaging.MessageFailureInfo;
import java.util.List;
public class MessagingActivity extends Activity implements
ServiceConnection, MessageClientListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(com.example.messagingtutorialskeleton.R.layout.messaging);
doBind();
Intent intent = getIntent();
recipientId = intent.getStringExtra("RECIPIENT_ID");
sendButton = (Button) findViewById(R.id.sendButton);
messageBodyField = (EditText) findViewById(R.id.messageBodyField);
sendButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sendMessage();
}
});
}
private void doBind() {
Intent serviceIntent = new Intent(this, MessageService.class);
bindService(serviceIntent, this, BIND_AUTO_CREATE);
}
private void sendMessage() {
messageBody = messageBodyField.getText().toString();
if (messageBody.isEmpty()) {
Toast.makeText(this, "Please enter a message", Toast.LENGTH_LONG).show();
return;
}
//Here is where you will actually send the message throught Sinch
messageService.sendMessage(recipientId, messageBody);
}
@Override
public void onDestroy() {
unbindService(this);
super.onDestroy();
}
private String recipientId;
private Button sendButton;
private EditText messageBodyField;
private String messageBody;
private Class messageServ
@Override
public void onIncomingMessage(MessageClient client, Message message) {
//Update the UI on an incoming message
}
@Override
public void onMessageSent(MessageClient client, Message message,
String recipientId) {
//Update the UI on an outgoing message
}
@Override
public void onMessageFailed(MessageClient client, Message message,
MessageFailureInfo failureInfo) {
//Notify the user if message fails to send
Toast.makeText(this, "Message failed to send.", Toast.LENGTH_LONG).show();
}
@Override
public void onMessageDelivered(MessageClient client,
MessageDeliveryInfo deliveryInfo) {
//Intentionally left blank
}
@Override
public void onShouldSendPushData(MessageClient client, Message message,
List<PushPair> pushPairs) {
//Intentionally left blank
}
@Override
public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
//Define the messaging service and add a listener
messageService = (MessageService.MessageServiceInterface) iBinder;
messageService.addMessageClientListener(this);
//Notify the user if they are not connected to the Sinch client.
//Otherwise, for example, if your app key & secret are typed
//in wrong, the user might keep hitting the send button
//with no feedback
if (!messageService.isSinchClientStarted()) {
Toast.makeText(this, "The message client did not start."
,Toast.LENGTH_LONG).show();
}
}
@Override
public void onServiceDisconnected(ComponentName componentName) {
messageService = null;
}
}
它说无法解析符号messageService,我在MessageService.java中定义了消息服务:
package com.sinch.messagingtutorialskeleton;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import com.parse.ParseUser;
import com.sinch.android.rtc.ClientRegistration;
import com.sinch.android.rtc.Sinch;
import com.sinch.android.rtc.SinchClient;
import com.sinch.android.rtc.SinchClientListener;
import com.sinch.android.rtc.SinchError;
import com.sinch.android.rtc.messaging.MessageClient;
import com.sinch.android.rtc.messaging.MessageClientListener;
import com.sinch.android.rtc.messaging.WritableMessage;
public class MessageService extends Service implements SinchClientListener {
//App key and app secret are in your Sinch dashboard
//Explanatory screenshot below
private static final String APP_KEY = "41ea73ff-fb32-41e7-8c1f-f3f609bba107";
private static final String APP_SECRET = "xsy05v7bLUyNva7yXMdtJg==";
private static final String ENVIRONMENT = "sandbox.sinch.com";
private final MessageServiceInterface serviceInterface =
new MessageServiceInterface();
private SinchClient sinchClient = null;
private MessageClient messageClient = null;
private String currentUserId;
//Gets called when you start the service from LoginActivity
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
//Get the current user id
currentUserId = ParseUser.getCurrentUser().getObjectId().toString();
if (currentUserId != null && !isSinchClientStarted()) {
startSinchClient(currentUserId);
}
return super.onStartCommand(intent, flags, startId);
}
//Start the Sinch client
public void startSinchClient(String username) {
//Build the Sinch client with the current user id,
//app key, app secret, and environment host
sinchClient = Sinch.getSinchClientBuilder()
.context(this)
.userId(username)
.applicationKey(APP_KEY)
.applicationSecret(APP_SECRET)
.environmentHost(ENVIRONMENT)
.build();
sinchClient.addSinchClientListener(this);
//This line is necessary to have messaging in your app!
sinchClient.setSupportMessaging(true);
sinchClient.setSupportActiveConnectionInBackground(true);
sinchClient.checkManifest();
sinchClient.start();
}
//To check if the Sinch client is already started
private boolean isSinchClientStarted() {
return sinchClient != null && sinchClient.isStarted();
}
//Do you want your app to do something if starting the client fails?
@Override
public void onClientFailed(SinchClient client, SinchError error) {
sinchClient = null;
}
//Do you want your app to do something when the sinch client starts?
@Override
public void onClientStarted(SinchClient client) {
client.startListeningOnActiveConnection();
messageClient = client.getMessageClient();
}
//Do you want your app to do something when the sinch client stops?
@Override
public void onClientStopped(SinchClient client) {
sinchClient = null;
}
//Pretty self explanitory - stop the Sinch client
public void stop() {
if (isSinchClientStarted()) {
sinchClient.stop();
sinchClient.removeSinchClientListener(this);
}
sinchClient = null;
}
//Called when you bind this to an activity (I'll get there soon)
@Override
public IBinder onBind(Intent intent) {
return serviceInterface;
}
@Override
public boolean onUnbind(Intent intent) {
stop();
stopSelf();
return super.onUnbind(intent);
}
@Override
public void onDestroy() {
stop();
super.onDestroy();
}
@Override
public void onLogMessage(int level, String area, String message) {
//Intentionally left blank. You will get errors if you
//try to remove this method.
}
@Override
public void onRegistrationCredentialsRequired(SinchClient client,
ClientRegistration clientRegistration) {
//Intentionally left blank. You will get errors if you
//try to remove this method.
}
public void sendMessage(String recipientUserId, String textBody) {
if (messageClient != null) {
WritableMessage message =
new WritableMessage(recipientUserId, textBody);
messageClient.send(message);
}
}
public void addMessageClientListener(MessageClientListener listener) {
if (messageClient != null) {
messageClient.addMessageClientListener(listener);
}
}
public void removeMessageClientListener(MessageClientListener listener) {
if (messageClient != null) {
messageClient.removeMessageClientListener(listener);
}
}
//Methods that you can call from MessagingActivity
public class MessageServiceInterface extends Binder {
public void sendMessage(String recipientUserId, String textBody) {
MessageService.this.sendMessage(recipientUserId, textBody);
}
public void addMessageClientListener(MessageClientListener listener) {
MessageService.this.addMessageClientListener(listener);
}
public void removeMessageClientListener(MessageClientListener listener) {
MessageService.this.removeMessageClientListener(listener);
}
public boolean isSinchClientStarted() {
return MessageService.this.isSinchClientStarted();
}
}
}
我真的很新,我想在此方面有所帮助:D
最佳答案
哦,我的坏。我错过了其余的代码。
我认为您需要在类中添加messageService声明,因此添加
private MessageServiceInterface messageService;
您的代码附近的某处:
private String recipientId;
private Button sendButton;
private EditText messageBodyField;
private String messageBody;
onServiceConnected回调将设置messageService字段的值。