java无法连接到ftp服务器安卓 ftp应用程序
我试图在安卓 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Ubuntu中的本地ftp服务器时,我收到了以下消息“错误:无法连接到主机192.168.1.2”(从笔记本电脑的终端连接时,我的ftp服务器工作正常)。该应用程序可以很好地编译和安装。以下是MainActivity的代码。爪哇
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。实例瓦吉尔。ftpclient_1 D/dalvikvm﹕ 延迟启用CheckJNI 07-03 23:43:35.051 16781-16781/com。实例瓦吉尔。ftpclient_1 D/ActivityThread﹕ SetTargetSeapUtilization:0.25 07-03 23:43:35.051 16781-16781/com。实例瓦吉尔。ftpclient_1 D/ActivityThread﹕ SetTargetTheApidealFree:8388608 07-03 23:43:35.051 16781-16781/com。实例瓦吉尔。ftpclient_1 D/ActivityThread﹕ setTargetHeapConcurrentStart:2097152 07-03 23:43:35.391 16781-16781/com。实例瓦吉尔。ftpclient_1 I/dalvikvm﹕ 找不到方法安卓。看法查看组。onRtlPropertiesChanged,引用自方法安卓。支持v7。小装置。工具栏。onrtlproperty已更改 07-03 23:43:35.391 16781-16781/com。实例瓦吉尔。ftpclient_1带dalvikvm﹕ VFY:无法解析虚拟方法13338:L安卓/view/ViewGroup;。不动产变更(一)V 07-03 23:43:35.391 16781-16781/com。实例瓦吉尔。ftpclient_1 D/dalvikvm﹕ VFY:在0x0007处替换操作码0x6f 07-03 23:43:35.401 16781-16781/com。实例瓦吉尔。ftpclient_1 I/dalvikvm﹕ 找不到方法安卓。所容纳之物Darray先生。GetChangingConfiguration,引用自安卓方法。支持v7。内部的小装置。达雷。GetChanging配置 07-03 23:43:35.401 16781-16781/com。实例瓦吉尔。ftpclient_1带dalvikvm﹕ VFY:无法解析虚拟方法413:L安卓/content/res/TypedArray;。GetChangingConfiguration()I 07-03 23:43:35.401 16781-16781/com。实例瓦吉尔。ftpclient_1 D/dalvikvm﹕ VFY:在0x0002处替换操作码0x6e 07-03 23:43:35.401 16781-16781/com。实例瓦吉尔。ftpclient_1 I/dalvikvm﹕ 找不到方法安卓。所容纳之物Darray先生。getType,从方法安卓引用。支持v7。内部的小装置。达雷。getType 07-03 23:43:35.401 16781-16781/com。实例瓦吉尔。ftpclient_1带dalvikvm﹕ VFY:无法解析虚拟方法435:L安卓/content/res/TypedArray;。getType(I)I 07-03 23:43:35.401 16781-16781/com。实例瓦吉尔。ftpclient_1 D/dalvikvm﹕ VFY:在0x0002处替换操作码0x6e 07-03 23:43:35.511 16781-16781/com。实例瓦吉尔。ftpclient_1 D/libEGL﹕ 已加载/system/lib/egl/libEGL_adreno200。所以 07-03 23:43:35.511 16781-16781/com。实例瓦吉尔。ftpclient_1 D/libEGL﹕ loaded/system/lib/egl/libGLESv1_CM_adreno200。所以 07-03 23:43:35.521 16781-16781/com。实例瓦吉尔。ftpclient_1 D/libEGL﹕ 已加载/system/lib/egl/libGLESv2_adreno200。所以 07-03 23:43:35.521 16781-16781/com。实例瓦吉尔。ftpclient_1 I/Adreno200 EGL﹕ : EGL 1.4高通公司构建: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 当地分支机构: 远程分支:quic/jb_rel_2.0.3 局部补丁:无 重构分支:AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.02.21.107+无 07-03 23:43:35.551 16781-16781/com。实例瓦吉尔。ftpclient_1 D/OpenGLRenderer﹕ 正在启用调试模式0 07-03 23:43:54.211 16781-16781/com。实例瓦吉尔。ftpclient_1 I/AppCompatDelegate﹕ 活动的LayoutFlater已安装工厂,因此我们无法安装AppCompat的 07-03 23:45:45.431 16781-16781/com。实例瓦吉尔。ftpclient_1 D/main活动﹕ 错误:无法连接到主机192.168.1.2
# 1 楼答案
问题解决了。我使用runOnUiThread(new Runnable()运行到ftp服务器的连接。一旦我移除它,我就可以连接了