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大家好，我正在创建简单的交互式 android 应用程序。服务器运行 Java。事实证明，我无法从服务器接收文件。

Android代码如下

public class MainActivity extends Activity {

public DataReceiving dataReceiving;
public DataTransfer dataTransfer;
private EditText inputData;
private Button sendParameters;
private Button startComputation;
public TextView displayText;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    inputData= (EditText) findViewById(R.id.editText1);
    sendParameters=(Button) findViewById(R.id.button1);
    startComputation=(Button) findViewById(R.id.button2);
    displayText=(TextView) findViewById(R.id.textView1);




    startComputation.setOnClickListener(new OnClickListener() {     

        public void onClick(View v) {
            String numberOfGates=inputData.getText().toString();
            ArrayList send=new ArrayList();
            send.add(numberOfGates);                
            dataTransfer=new DataTransfer();
            dataTransfer.execute(send);

        }
    });

    sendParameters.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            dataReceiving=new DataReceiving();
            dataReceiving.execute();
        }
    });

}
public  class DataReceiving extends AsyncTask<Void, Void, ArrayList>
{

    @Override
    protected ArrayList doInBackground(Void... params) {
        ArrayList receivedData=new ArrayList();
        Log.i("DataReceiving", "doInbackgroung works");
        try {
            receivedData=receive();
        } catch (ClassNotFoundException e) {
            Log.e("DataReceiving", "Problems with receive method. Issue with class");
            e.printStackTrace();
        } catch (IOException e) {
            Log.e("DataReceiving", "Problems with receive method. Issue with IO");
            e.printStackTrace();
        }
        return receivedData;
    }

    @Override
    protected void onPostExecute(ArrayList result) {
          super.onPostExecute(result);
          displayText.setText(result.toString());

        }


}


public ArrayList receive () throws IOException, ClassNotFoundException
    {
        Log.i("receive method", "works");
        ServerSocket s= new ServerSocket(8888);
        Log.i("receive method", "ServerSocket(8888)");
        Socket incoming =s.accept();
        Log.i("receive method", "accept()");
        ObjectInputStream ios = new ObjectInputStream(incoming.getInputStream());
        Log.i("receive method", "ios");
        ArrayList b=new ArrayList();
        b = (ArrayList) ios.readObject();               
        Log.i("receive method", "data were received");
        ios.close();
        incoming.close();
        s.close();
        return b;
    }





@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

这是日志

06-18 18:08:51.709: D/dalvikvm(2160): GC_CONCURRENT freed 69K, 7% free 2760K/2952K, paused 78ms+85ms, total 261ms
06-18 18:08:52.079: D/gralloc_goldfish(2160): Emulator without GPU emulation detected.
06-18 18:09:05.090: I/DataReceiving(2160): doInbackgroung works
06-18 18:09:05.099: I/receive method(2160): works
06-18 18:09:05.099: I/receive method(2160): ServerSocket(8888)

似乎 Socket 传入 =s.accept(); 不起作用，我不知道为什么

这是清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidapp"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.androidapp.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

服务器端很简单

Socket s=new Socket("192.168.1.110", 8888);
ObjectOutputStream oos=new ObjectOutputStream(s.getOutputStream());
ArrayLIst b = new ArrayList();
b.add("It Works");
oos.writeObject(b);
oos.close();
s.close();

我将非常感谢任何想法，如何解决这个问题。谢谢

4

1 回答 1

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我认为客户端部分工作正常，它停止在接受方法。所以问题出在永远无法连接的服务器上。服务器部分应该是这样的：

try {
   Socket s = new Socket();
   InetAddress addr = InetAddress.getByName("192.168.1.110");
   SocketAddress sockaddr = new InetSocketAddress(addr, 8888);
   s.connect(sockaddr, 20000); // 20 seconds time out
   ObjectOutputStream oos=new ObjectOutputStream(s.getOutputStream());
   ArrayLIst b = new ArrayList();
   b.add("It Works");
   oos.writeObject(b);
   oos.close();
   s.close();
}
catch (Exception e)
{
 .....
}
于 2013-06-19T10:28:30.720 回答