我的eclipse模拟器似乎遇到了重大问题，并且不知道它是ram大小还是我的代码。在我看来，我的代码应该运行，就像在我的java netbeans项目中一样。
每次我运行我的应用程序并按下连接按钮时，我想获取服务器发回的字符串，然后对其执行某些操作。我有一个“进程连接”方法，读取字符串，但当我返回它并实际使用返回的内容时，我的模拟器崩溃
我的代码如下：
package za.nmmu.wrap302.networks.example02;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
private ListView lstMessages;
private EditText txtMessage;
private ArrayList<String> messages;
private ArrayAdapter<String> adapter;
String message = "";
private ServerConnection connection;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get references to View objects
txtMessage = (EditText) findViewById(R.id.txtMessage);
lstMessages = (ListView) findViewById(R.id.lstMessages);
// set up adapter
messages = new ArrayList<String>();
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, messages);
lstMessages.setAdapter(adapter);
// attach event listener
txtMessage.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_ENTER)
&& (event.getAction() == KeyEvent.ACTION_DOWN)) {
try {
onTxtMessageEnterPressed();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return true;
}
return false;
}
});
}
public void onBtnConnectClicked(View view) {
clearMessages();
connection = new ServerConnection();
connection.start();
}
public void onTxtMessageEnterPressed() throws IOException {
if (connection != null) {
String message = txtMessage.getText().toString();
txtMessage.getText().clear();
connection.sendData(message);
}
}
public void addMessage(String message) {
adapter.add(message);
}
public void clearMessages() {
adapter.clear();
}
// the thread that will be communicating with the server
public class ServerConnection extends Thread {
// the I/O streams that will be receiving/sending data from/to the
// server
private ObjectOutputStream output;
private ObjectInputStream input;
private Socket client;
@Override
public void run() {
try {
// Step 1: Create a Socket to make connection
connectToServer();
// Step 2: Get the input and output streams
getStreams();
// Step 3: Process connection
processConnection();
// Step 4: Close connection
//closeConnection();
} catch (IOException e) {
Log.e("CONNECTION", e.getMessage());
}
}
public void addMessage(final String message) {
runOnUiThread(new Runnable() {
@Override
public void run() {
MainActivity.this.addMessage(message);
}
});
}
private void connectToServer() throws IOException {
addMessage("Attempting connection\n");
client = new Socket("10.0.0.7", 5001);
addMessage("Connected to: " + client.getInetAddress().getHostName());
}
private void getStreams() throws IOException {
output = new ObjectOutputStream(client.getOutputStream());
output.flush();
input = new ObjectInputStream(client.getInputStream());
addMessage("Got I/O streams");
}
//I would like to call the message below and return it to anywhere else in the code
private String processConnection() throws IOException
{
do {
try {
message = (String) input.readObject();
addMessage(message);
return message;
}
catch (ClassNotFoundException classNotFoundException)
{
addMessage("ERROR: Unknown object type received");
}
return message;
} while (!message.equals("SERVER>>> TERMINATE"));
}
private void sendData(String message) {
try {
output.writeObject(message);
output.flush();
addMessage("CLIENT>>>" + message);
} catch (IOException ioException) {
addMessage("ERROR: Error writing object");
}
}
private void closeConnection() throws IOException {
addMessage("Closing connection");
output.close();
input.close();
client.close();
}
}
}
每当我从任何地方调用processConnection方法时，我的应用程序似乎都会崩溃。 我的服务器接收到我发送的消息，但我的客户端没有阅读。
http://i.stack.imgur.com/cNu7m.png
我的logcat显示：
06-13 08:18:00.460: D/dalvikvm(1145): GC_FOR_ALLOC freed 45K, 4% free 3076K/3204K, paused 293ms, total 296ms
06-13 08:18:00.460: I/dalvikvm-heap(1145): Grow heap (frag case) to 3.687MB for 635812-byte allocation
06-13 08:18:00.530: D/dalvikvm(1145): GC_FOR_ALLOC freed 1K, 4% free 3695K/3828K, paused 55ms, total 55ms
06-13 08:18:02.220: I/Choreographer(1145): Skipped 172 frames! The application may be doing too much work on its main thread.
06-13 08:18:02.240: D/gralloc_goldfish(1145): Emulator without GPU emulation detected.
06-13 08:18:03.100: I/Choreographer(1145): Skipped 198 frames! The application may be doing too much work on its main thread.
06-13 08:18:27.660: E/InputEventSender(1145): Exception dispatching finished signal.
06-13 08:18:27.660: E/MessageQueue-JNI(1145): Exception in MessageQueue callback: handleReceiveCallback
模拟器中的ram会影响这个吗？我做错了什么？
答案 0 :(得分：0)
您需要使用Async任务生成上传到其他线程。 Android在单线程模型上工作，并使用相同的线程来使HTTPRequest可能导致FATAL异常。创建一个异步任务并将上传产生到它。
AsyncTaskRunner runner = new AsyncTaskRunner();
runner.execute(<pass the required parameters here for file upload>);
private class AsyncTaskRunner extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
//Call the function to upload the file here
}
这是Logcat通过主线程告诉你的工作太多了。