无法连接到 ftp 服务器 android ftp 应用程序

Question

我正在尝试在 android studio 中构建一个 FTP 应用程序，但我似乎无法让它工作。经过一些调试后，我能够避免代码中的一些错误，但现在当我尝试连接到我在 Ubuntu 中创建的本地 ftp 服务器时，我收到以下消息 "Error: could not connect to host 192.168.1.2"（我的ftp 从笔记本电脑的终端连接时服务器工作正常）。该应用程序可以正常编译和安装。下面是来自 MainActivity.java

的代码

public boolean bindService(Intent service, ServiceConnection conn, int flags) {
    return false;
}

@Override
protected void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textView = (TextView) findViewById(R.id.textView);
    connect = (Button) findViewById(R.id.connect_button);
    connect.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            if (isNetworkAvailable()) {
                new FTPConnect().execute();
            } else {
                AlertDialog.Builder b = new AlertDialog.Builder(MainActivity.this);
                b.setMessage("Internet connectivity failure.Try again!");
                b.show();
            }
        }
    });
}

class FTPConnect extends AsyncTask<Void, Void, Void> {
    ProgressDialog pDialog;

    @Override
    protected void onPreExecute() {
        pDialog = new ProgressDialog(MainActivity.this);
        pDialog.setMessage("Connecting...");
        pDialog.show();
        super.onPreExecute();
    }

    @Override
    protected Void doInBackground(Void... params) {

        runOnUiThread(new Runnable() {

            @Override
            public void run() {
                ftpClient = new FTPClient();
                try {
                    ftpClient.connect(FTPSERVER, PORT);
                    ftpClient.login(USERNAME, PASSWORD);
                    ftpClient.enterLocalPassiveMode();
                    System.out.println("status :: " + ftpClient.getStatus());
                    setContentView(R.layout.connected);
                    textView = (TextView) findViewById(R.id.textView);
                    FTPFile[] files = ftpClient.listFiles();
                    DateFormat dateFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                    for (FTPFile file : files) {
                        String details = file.getName();
                        if (file.isDirectory()) {
                            details = "[" + details + "]";
                        }
                        details += "\t\t" + file.getSize();
                        details += "\t\t" + dateFormater.format(file.getTimestamp().getTime());
                        System.out.println(details);
                    }
                } catch (Exception e) {
                    Log.d(TAG, "Error: could not connect to host " + FTPSERVER);
                }
            }
        });
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        if (null != pDialog && pDialog.isShowing()) {
            pDialog.dismiss();
        }
        super.onPostExecute(result);
    }
}

// Check Internet Connection

public boolean isNetworkAvailable() {
    ConnectivityManager connectivity = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    if (connectivity == null) {
        return false;
    } else {
        NetworkInfo[] info = connectivity.getAllNetworkInfo();
        if (info != null) {
            for (NetworkInfo anInfo : info) {
                if (anInfo.getState() == NetworkInfo.State.CONNECTED) {
                    return true;
                }
            }
        }
    }
    return false;
}

Logcat:

07-03 23:43:34.901 16781-16781/com.example.vagil.ftpclient_1 D/dalvikvm：延迟启用CheckJNI 07-03 23:43:35.051 16781-16781/com.example.vagil.ftpclient_1 D/ActivityThread：setTargetHeapUtilization:0.25 07-03 23:43:35.051 16781-16781/com.example.vagil.ftpclient_1 D/ActivityThread﹕setTargetHeapIdealFree:8388608 07-03 23:43:35.051 16781-16781/com.example.vagil.ftpclient_1 D/ActivityThread﹕setTargetHeapConcurrentStart:2097152 07-03 23:43:35.391 16781-16781/com.example.vagil.ftpclient_1 I/dalvikvm：找不到方法android.view.ViewGroup.onRtlPropertiesChanged，引用自方法android.support。 v7.widget.Toolbar.onRtlPropertiesChanged 07-03 23:43:35.391 16781-16781/com.example.vagil.ftpclient_1 W/dalvikvm：VFY: unable to resolve virtual method 13338: Landroid/view/ViewGroup;.onRtlPropertiesChanged (I )V 07-03 23:43:35.391 16781-16781/com.example.vagil.ftpclient_1 D/dalvikvm：VFY：在0x0007替换操作码0x6f 07-03 23:43:35.401 16781-16781/com.example.vagil.ftpclient_1 I/dalvikvm：找不到方法android.content.res.TypedArray.getChangingConfigurations，引用自方法android.support。 v7.internal.widget.TintTypedArray.getChangingConfigurations 07-03 23:43:35.401 16781-16781/com.example.vagil.ftpclient_1 W/dalvikvm﹕VFY: unable to resolve virtual method 413: Landroid/content/res/TypedArray;.getChangingConfigurations()我 07-03 23:43:35.401 16781-16781/com.example.vagil.ftpclient_1 D/dalvikvm：VFY：在0x0002替换操作码0x6e 07-03 23:43:35.401 16781-16781/com.example.vagil.ftpclient_1 I/dalvikvm：找不到方法android.content.res.TypedArray.getType，引用自方法android.support。 v7.internal.widget.TintTypedArray.getType 07-03 23:43:35.401 16781-16781/com.example.vagil.ftpclient_1 W/dalvikvm：VFY: unable to resolve virtual method 435: Landroid/content/res/TypedArray;.getType (I ）我 07-03 23:43:35.401 16781-16781/com.example.vagil.ftpclient_1 D/dalvikvm：VFY：在0x0002替换操作码0x6e 07-03 23:43:35.511 16781-16781/com.example.vagil.ftpclient_1 D/libEGL：加载/system/lib/egl/libEGL_adreno200.so 07-03 23:43:35.511 16781-16781/com.example.vagil.ftpclient_1 D/libEGL：加载/system/lib/egl/libGLESv1_CM_adreno200.so 07-03 23:43:35.521 16781-16781/com.example.vagil.ftpclient_1 D/libEGL：加载/system/lib/egl/libGLESv2_adreno200.so 07-03 23:43:35.521 16781-16781/com.example.vagil.ftpclient_1 I/Adreno200-EGL：EGL 1.4 QUALCOMM 构建：AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.02.21.107_msm8625_JB_REL_2.0.3_CL3357771_release_AU (CL3357771) 建造日期：2013 年 2 月 25 日星期一本地分支机构：远程分支：quic/jb_rel_2.0.3 本地补丁：NONE 重建分支：AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.02.21.107 + NOTHING 07-03 23:43:35.551 16781-16781/com.example.vagil.ftpclient_1 D/OpenGLRenderer：开启调试模式0 07-03 23:43:54.211 16781-16781/com.example.vagil.ftpclient_1 I/AppCompatDelegate﹕ Activity的LayoutInflater已经出厂安装所以不能安装AppCompat的 07-03 23:45:45.431 16781-16781/com.example.vagil.ftpclient_1 D/MainActivity﹕错误：无法连接到主机192.168.1.2

Answer 1

问题已解决。我正在使用运行OnUiThread(new Runnable() 来运行与 ftp 服务器的连接。删除它后我就可以连接了。

无法连接到 ftp 服务器 android ftp 应用程序

Could not connect to ftp server android ftp application

java

ftp

android