我对java相当陌生，但我正在尝试创建一个应用程序，定期收集wifi信息，将其显示给用户并发送到数据库。
我有无线收集工作，它收集的ssid，bssid，rssi和时间戳。它显示给用户，我甚至可以发送信息到服务器。用户界面
但是，我的当前代码没有将数据正确地发送到服务器。它发送数据，但卡在一个ssid、bssid和rssi上。例如，如果有20个无线网络，应用程序将发送19个相同的条目，并且可能有下一个条目作为第20个条目。数据库
我相信这与函数insertdata中的asynctask有关，也许它比wifithing函数运行得更快。但我不确定如何解决这个问题。
感谢所有回复！
更新
大家好！
这里使用了两个函数wifithing（）和insertdata（），其中包含一个异步任务，用于将数据发送到mysql数据库，wifithing（）工作正常，并将ssid、bssid和rssi分配给要在别处显示的设备，它以循环的方式在所有可用的网络中循环。
现在，insertdata（）由按键调用，并使用循环遍历所有可用的网络。这确实有效，但是我在数据库中看到了一些奇怪的结果，首先在开头添加了一个重复条目，然后在第二次按下按钮时没有发送数据，在第三次按下时有效，然后在第四次按下时无效。。重复的数据库
编辑wififragment.java
package com.example.joe.ratscanner;
import android.Manifest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.Executor;
//return inflater.inflate(R.layout.fragment_wifi, container, false);
/**
* A simple {@link Fragment} subclass.
*/
public class wififragment extends Fragment {
int count= 0;
Timer t;
String ServerURL = "http://ratscanner.duckdns.org/get_data.php" ;
String TempWifi;
String TempBSSID;
String Templevel;
String test;
String isthishappening;
TimerTask timer= new TimerTask(){
@Override
public void run() {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
//count--;
//if (count >= 0) {
if(count == 0) {
//Toast.makeText(getActivity(),"this updated",Toast.LENGTH_SHORT).show();
// wifithing();
//InsertData(); //probably remove this later
}
}
});
//if (count <= 0) {
// t.cancel();
//}
}
};
public class device{
CharSequence name;
public String setName(CharSequence name) {
this.name = name;
return null;
}
public CharSequence getName (){
return name;
}
}
final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 125;
List<ScanResult> wifiList;
private WifiManager wifi;
List<device> values = new ArrayList<device>();
int netCount=0;
int AnetCount=0;
RecyclerView recyclerView;
WifiScanAdapter wifiScanAdapter;
public wififragment() {
// Required empty public constructor
}
public static wififragment newInstance() {
wififragment fragment = new wififragment();
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
//Make instance of Wifi
Button btnScan= (Button) getActivity().findViewById(R.id.wifiScan);
wifi = (WifiManager) getActivity().getApplicationContext().getSystemService(Context.WIFI_SERVICE);
//Check wifi enabled or not
if (wifi.isWifiEnabled() == false)
{
Toast.makeText(getActivity(), "Wifi is disabled enabling...", Toast.LENGTH_LONG).show();
wifi.setWifiEnabled(true);
}
//register Broadcast receiver
getActivity().registerReceiver(new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
wifiList=wifi.getScanResults();
netCount=wifiList.size();
AnetCount=wifiList.size();
// wifiScanAdapter.notifyDataSetChanged();
Log.d("Wifi","Total Wifi Network"+netCount);
}
},new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
wifiScanAdapter=new WifiScanAdapter(values,getContext());
recyclerView= (RecyclerView) getActivity().findViewById(R.id.wifiRecyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(wifiScanAdapter);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkandAskPermission();
} else {
wifithing();
}
btnScan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
wifithing();
InsertData();
InsertData();
Toast.makeText(getContext(), netCount +"\n"+ AnetCount , Toast.LENGTH_SHORT).show();
}
});
}
/* public void wifithing(){
SimpleDateFormat dateformat = new SimpleDateFormat("dd-MMM-yyyy");
wifi.startScan();
values.clear();
try {
netCount = netCount - 1;
while (netCount >= 0) {
String currentDateTimeString = dateformat.getDateTimeInstance().format(new Date());
device d = new device();
d.setName(wifiList.get(netCount).SSID.toString()+"\n"+ wifiList.get(netCount).BSSID +" "+ wifiList.get(netCount).level +"\n" + currentDateTimeString );
//TempWifi = d;//returns nothing, need to make it return ssid
//TempWifi = "";// clears the old data
TempWifi = wifiList.get(netCount).SSID.toString(); //adds the new ssid
TempBSSID = wifiList.get(netCount).BSSID.toString(); //adds the new bssid
Templevel = Integer.toString(wifiList.get(netCount).level);// adds the new level
//currently have issue where one/two ssids are put in database
// maybe see how many "SSIDS" database recieves and how many show up on scan
// 20 on server, 20 on app
//20 on server, 20 on app
//19 on server, 19 on app
isthishappening = "This is from wifithing";
InsertData();// calls the method which sends the data to server
Log.d("WiFi",d.getName().toString());
values.add(d);
wifiScanAdapter.notifyDataSetChanged();
netCount=netCount -1;
}
}
catch (Exception e){
Log.d("Wifi", e.getMessage());
}
}*/
public void wifithing(){
SimpleDateFormat dateformat = new SimpleDateFormat("dd-MMM-yyyy");
wifi.startScan();
values.clear();
try {
netCount = netCount - 1;
while (netCount >= 0) {
String currentDateTimeString = dateformat.getDateTimeInstance().format(new Date());
device d = new device();
d.setName(wifiList.get(netCount).SSID.toString()+"\n"+ wifiList.get(netCount).BSSID +" "+ wifiList.get(netCount).level +"\n" + currentDateTimeString );
//TempWifi = d;//returns nothing, need to make it return ssid
//currently have issue where one/two ssids are put in database
// maybe see how many "SSIDS" database recieves and how many show up on scan
// 20 on server, 20 on app
//20 on server, 20 on app
//19 on server, 19 on app
isthishappening = "This is from wifithing";
//InsertData();// calls the method which sends the data to server
Log.d("WiFi",d.getName().toString());
values.add(d);
wifiScanAdapter.notifyDataSetChanged();
netCount=netCount -1;
}
}
catch (Exception e){
Log.d("Wifi", e.getMessage());
}
}
//this code is responsible for sending data to the server through PHP////////////////////////////////////////////////////////
public void InsertData(){
class SendPostReqAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
try {
AnetCount = AnetCount - 1;
while (AnetCount >= 0) {
TempWifi = wifiList.get(AnetCount).SSID.toString(); //adds the new ssid
TempBSSID = wifiList.get(AnetCount).BSSID.toString(); //adds the new bssid
Templevel = Integer.toString(wifiList.get(AnetCount).level);// adds the new level
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("SSID", TempWifi));
nameValuePairs.add(new BasicNameValuePair("MAC", TempBSSID));
nameValuePairs.add(new BasicNameValuePair("level", Templevel));
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(ServerURL);
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
AnetCount = AnetCount - 1;
}
}
catch (Exception e){
Log.d("Wifi", e.getMessage());
}
return "Data Inserted Successfully";
}
@Override
protected void onPostExecute(String result) {
isthishappening = "This is from async";
Log.d("wifi", isthishappening);
//Log.d("wifi", result);
super.onPostExecute(result);
//Toast.makeText(getContext(), TempWifi, Toast.LENGTH_SHORT).show();
}
}
SendPostReqAsyncTask sendPostReqAsyncTask = new SendPostReqAsyncTask();
sendPostReqAsyncTask.execute();
}///////////////////////////////////////////////////////////////////////////////////////////////////////////////
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
t = new Timer();
t.scheduleAtFixedRate(timer , 10000 , 10000);
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_wifi, container, false);
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
switch (requestCode) {
case REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS: {
Map<String, Integer> perms = new HashMap<String, Integer>();
perms.put(Manifest.permission.ACCESS_COARSE_LOCATION, PackageManager.PERMISSION_GRANTED);
for (int i = 0; i < permissions.length; i++)
perms.put(permissions[i], grantResults[i]);
if (perms.get(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
wifi.startScan();
} else {
// Permission Denied
Toast.makeText(getContext(), "Some Permission is Denied", Toast.LENGTH_SHORT)
.show();
}
}
}
}
private void checkandAskPermission() {
List<String> permissionsNeeded = new ArrayList<String>();
final List<String> permissionsList = new ArrayList<String>();
if (!addPermission(permissionsList, Manifest.permission.ACCESS_COARSE_LOCATION))
permissionsNeeded.add("Network");
if (permissionsList.size() > 0) {
if (permissionsNeeded.size() > 0) {
// Need Rationale
String message = "You need to grant access to " + permissionsNeeded.get(0);
for (int i = 0; i < permissionsNeeded.size(); i++)
message = message + ", " + permissionsNeeded.get(i);
showMessageOKCancel(message,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
}
});
return;
}
requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
return;
}
// initVideo();
}
private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
new AlertDialog.Builder(getActivity())
.setMessage(message)
.setPositiveButton("OK", okListener)
.setNegativeButton("Cancel", okListener)
.create()
.show();
}
private boolean addPermission(List<String> permissionsList, String permission) {
if (getActivity().checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
permissionsList.add(permission);
if (!shouldShowRequestPermissionRationale(permission))
return false;
}
return true;
}
public void onDetach() {
super.onDetach();
count = 1;
t.cancel();
//timer was created at top of page as infinite, never cancelled even when the fragment closed -
// t.cancel(): stops the timer and allows the page to switch without crashing
}
}在wififragment.java的代码片段之前
public void wifithing(){
SimpleDateFormat dateformat = new SimpleDateFormat("dd-MMM-yyyy");
wifi.startScan();
values.clear();
try {
netCount = netCount - 1;
while (netCount >= 0) {
String currentDateTimeString = dateformat.getDateTimeInstance().format(new Date());
device d = new device();
d.setName(wifiList.get(netCount).SSID.toString()+"\n"+ wifiList.get(netCount).BSSID +" "+ wifiList.get(netCount).level +"\n" + currentDateTimeString );
//TempWifi = d;//returns nothing, need to make it return ssid
//TempWifi = "";// clears the old data
TempWifi = wifiList.get(netCount).SSID.toString(); //adds the new ssid
TempBSSID = wifiList.get(netCount).BSSID.toString(); //adds the new bssid
Templevel = Integer.toString(wifiList.get(netCount).level);// adds the new level
//currently have issue where one/two ssids are put in database
// maybe see how many "SSIDS" database recieves and how many show up on scan
// 20 on server, 20 on app
//20 on server, 20 on app
//19 on server, 19 on app
InsertData();// calls the method which sends the data to server
Log.d("WiFi",d.getName().toString());
values.add(d);
wifiScanAdapter.notifyDataSetChanged();
netCount=netCount -1;
}
}
catch (Exception e){
Log.d("Wifi", e.getMessage());
}
}
//this code is responsible for sending data to the server through PHP////////////////////////////////////////////////////////
public void InsertData(){
class SendPostReqAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("SSID", TempWifi));
nameValuePairs.add(new BasicNameValuePair("MAC", TempBSSID));
nameValuePairs.add(new BasicNameValuePair("level", Templevel));
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(ServerURL);
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
return "Data Inserted Successfully";
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
//Toast.makeText(getContext(), TempWifi, Toast.LENGTH_SHORT).show();
}
}
SendPostReqAsyncTask sendPostReqAsyncTask = new SendPostReqAsyncTask();
sendPostReqAsyncTask.execute();
}///////////////////////////////////////////////////////////////////////////////////////////////////////////////
暂无答案！
目前还没有任何答案，快来回答吧！