我想发一个http请求来从网页上获取数据。在主要状态活动中,它可以工作,但是当我在片段中尝试它时,它不会。
MainStatusActivity.java:
public class MainStatusActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
FragmentEngineer fengineer;
FragmentInternet finternet;
FragmentOverview foverview;
FragmentSettings fsettings;
FragmentStatus fstatus;
FragmentWlan fwlan;
public static String cookietoheader;
public String toStatusFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_status);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
fengineer = new FragmentEngineer();
finternet = new FragmentInternet();
foverview = new FragmentOverview();
fsettings = new FragmentSettings();
fstatus = new FragmentStatus();
fwlan = new FragmentWlan();
final String cookieFromLogin;
if (savedInstanceState == null) {
Bundle extras = getIntent().getExtras();
if(extras == null) {
cookieFromLogin= null;
} else {
cookieFromLogin= extras.getString("Cookie");
}
} else {
cookieFromLogin= (String) savedInstanceState.getSerializable("Cookie");
}
cookietoheader = cookieFromLogin;
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@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_status, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
new PostClass2(this).execute();
Intent intent = new Intent(getApplicationContext(), MainLoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("EXIT", true);
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
FragmentTransaction ftrans = getFragmentManager().beginTransaction();
if (id == R.id.nav_status) {
ftrans.replace(R.id.container, fstatus);
} else if (id == R.id.nav_overview) {
ftrans.replace(R.id.container, foverview);
} else if (id == R.id.nav_internet) {
ftrans.replace(R.id.container, finternet);
} else if (id == R.id.nav_wlan) {
ftrans.replace(R.id.container, fwlan);
} else if (id == R.id.nav_settings){
ftrans.replace(R.id.container, fsettings);
} else if (id == R.id.nav_engineer){
ftrans.replace(R.id.container, fengineer);
}ftrans.commit();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
FragmentInternet.class:
public class FragmentInternet extends android.app.Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
private String cookies;
public FragmentInternet() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment FragmentInternet.
*/
// TODO: Rename and change types and number of parameters
public static FragmentInternet newInstance(String param1, String param2) {
FragmentInternet fragment = new FragmentInternet();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
new PostClass(this).execute();
}
class PostClass extends AsyncTask<String, Void, Void> {
private final Context context;
public PostClass(Context c){
this.context = c;
}
@Override
protected Void doInBackground(String... params) {
try {
final TextView outputView = (TextView) findViewById(R.id.showOutput);
URL url = new URL("http://speedport.ip/html/assistent/ea_internet_done.html");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("GET");
connection.setRequestProperty("Request URI", "/html/assistent/ea_internet_done.html");
connection.setRequestProperty("Request Version", "HTTP/1.1");
connection.setRequestProperty("Host", "speedport.ip");
connection.setRequestProperty("Connection", "keep-alive");
connection.setRequestProperty("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,image/webp");
connection.setRequestProperty("Upgrade-Insecure-Requests","1");
//connection.setRequestProperty("Origin","http://speedport.ip");
//connection.setRequestProperty("X-Requested-With","XMLHttpRequest");
connection.setRequestProperty("USER-AGENT", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36");
//connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
connection.setRequestProperty("Referer","http://speedport.ip/html/login/index.html");
connection.setRequestProperty("Accept-Encoding", "gzip, deflate, sdch");
connection.setRequestProperty("ACCEPT-LANGUAGE", "hu-HU,hu;q=0.8,en-US;q=0.6,en;q=0.4");
connection.setRequestProperty("Cookie", cookies);
int responseCode = connection.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
final StringBuilder output = new StringBuilder("Request URL " + url);
output.append(System.getProperty("line.separator") + "Response Code " + responseCode);
output.append(System.getProperty("line.separator") + "Response message " + responseMessage);
output.append(System.getProperty("line.separator") + "Type " + "GET");
output.append(System.getProperty("line.separator") + "Cookie " + cookies);
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line = "";
StringBuilder responseOutput = new StringBuilder();
System.out.println("output===============" + br);
while((line = br.readLine()) != null ) {
responseOutput.append(line);
}
br.close();
String outtotext = responseOutput.toString();
output.append(System.getProperty("line.separator") + "Response " + System.getProperty("line.separator") + System.getProperty("line.separator") + responseOutput.toString());
FragmentInternet.this.runOnUiThread(new Runnable() {
@Override
public void run() {
outputView.setText(output);
}
});
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
protected void onPostExecute() {
//progress.dismiss();
}
}*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_internet, container, false);
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
/*
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
*/
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p/>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
当我尝试它时显示下划线:new PostClass(this).execute()(它表示不能应用Postclass);最后TextView outputView =(TextView)findViewById(R.id.showOutput)(无法解析方法);
片段有效,http请求在没有片段的情况下有效(尝试blak活动)
答案 0 :(得分:0)
用此替换你的onCreate():
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
new PostClass(getContext()).execute();
}