我正在尝试测试我的安卓应用程序并将数据添加到本地主机上托管的数据库中。我使用 ngrok 打开了一个隧道来访问存储在本地计算机上的数据库。这是我的代码：
public class MainActivity extends FragmentActivity{
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private static String email;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
private static final int RESULT_SETTINGS = 1;
private static String IP_ADDRESS="http://682dc364.ngrok.com/";
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
Account[] accounts = AccountManager.get(getBaseContext()).getAccounts();
if(accounts.length > 0)
email = accounts[0].name;
Toast.makeText(this, email, Toast.LENGTH_SHORT).show();
mTitle = mDrawerTitle = getTitle();
addUser();
}
private static void addUser()
{
HashMap<String, String> nameValuePairs = new HashMap<String, String>();
nameValuePairs.put("email",email);
String id="addUser";
AsyncHttpPost asyncHttpPost = new AsyncHttpPost(nameValuePairs);
asyncHttpPost.execute(id,"http://"+IP_ADDRESS+"/MakeMyDay/add_user.php");
}
AsyncHttpPost
public class AsyncHttpPost extends AsyncTask<String, String, String>
{
private HashMap<String,String> mData=null;
public AsyncHttpPost(HashMap<String,String> data)
{
mData=data;
}
@Override
protected String doInBackground(String... params)
{
//JSONObject obj=getLocationInfo(mData.get("address"));
//getLatLong(obj);
//String lat=Double.toString(latitude);
//String lon=Double.toString(longitude);
//mData.put("Latitude", lat);
//mData.put("Longitude", lon);
HttpURLConnection connection;
OutputStreamWriter request = null;
ArrayList<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
Iterator<String> it = mData.keySet().iterator();
String parameters="";
while (it.hasNext()) {
String key = it.next();
String value=mData.get(key);
parameters=parameters+key+"="+value+"&";
Log.d("key",key);
Log.d("value",mData.get(key));
Log.d("string value",value);
nameValuePair.add(new BasicNameValuePair(key, mData.get(key)));
}
parameters=parameters.substring(0, parameters.length()-1);
Log.d("parameters",parameters);
URL url = null;
String response = null;
String id="";
try
{
id=params[0];
url = new URL(params[1]);
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestMethod("POST");
request = new OutputStreamWriter(connection.getOutputStream());
request.write(parameters);
request.flush();
request.close();
String line = "";
InputStreamReader isr = new InputStreamReader(connection.getInputStream());
BufferedReader reader = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null)
{
sb.append(line + "n");
}
// Response from server after login process will be stored in response variable.
response = sb.toString();
String s=regExExtractor(response);
// You can perform UI operations here
Log.d("server message","Message from Server: n"+ response);
Log.d("progress","here3");
isr.close();
reader.close();
}
catch (ClientProtocolException cpe) {
System.out.println("First Exception caz of HttpResponese :" + cpe);
cpe.printStackTrace();
} catch (IOException ioe) {
System.out.println("Second Exception caz of HttpResponse :" + ioe);
ioe.printStackTrace();
}
return response;
}
public String regExExtractor(String response)
{
String jsonResponse="";
Pattern p=Pattern.compile("(\Q[\E.*?\Q]\E)");
Matcher m=p.matcher(response);
while(m.find())
{
jsonResponse=m.group(1);
}
return jsonResponse;
}
/*@Override
protected String doInBackground(String... params)
{
ArrayList<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
Iterator<String> it = mData.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
String value=mData.get(key);
Log.d("key",key);
Log.d("value",mData.get(key));
Log.d("string value",value);
nameValuePair.add(new BasicNameValuePair(key, mData.get(key)));
}
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(params[0]);// in this case, params[0] is URL
post.addHeader("Content-Type", "application/x-www-form-urlencoded");
try {
// UrlEncodedFormEntity is an entity composed of a list of url-encoded pairs.
//This is typically useful while sending an HTTP POST request.
UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nameValuePair);
// setEntity() hands the entity (here it is urlEncodedFormEntity) to the request.
post.setEntity(urlEncodedFormEntity);
try {
// HttpResponse is an interface just like HttpPost.
//Therefore we can't initialize them
HttpResponse httpResponse = client.execute(post);
// According to the JAVA API, InputStream constructor do nothing.
//So we can't initialize InputStream although it is not an interface
InputStream inputStream = httpResponse.getEntity().getContent();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
StringBuilder stringBuilder = new StringBuilder();
String bufferedStrChunk = null;
while((bufferedStrChunk = bufferedReader.readLine()) != null){
stringBuilder.append(bufferedStrChunk);
}
Log.d("server response",stringBuilder.toString());
return stringBuilder.toString();
}
catch (ClientProtocolException cpe) {
System.out.println("First Exception caz of HttpResponese :" + cpe);
cpe.printStackTrace();
} catch (IOException ioe) {
System.out.println("Second Exception caz of HttpResponse :" + ioe);
ioe.printStackTrace();
}
} catch (UnsupportedEncodingException uee) {
System.out.println("An Exception given because of UrlEncodedFormEntity argument :" + uee);
uee.printStackTrace();
}
return null;
}*/
@Override
protected void onPostExecute(String result) {
// something...
//textView.setText(result);
}
}
add_user.php
<?php
$DBServer = 'localhost'; // e.g 'localhost' or '192.168.1.100'
$DBUser = 'xxxx';
$DBPass = 'xxxx';
$DBName = 'xxxx';
$conn = new mysqli($DBServer, $DBUser, $DBPass, $DBName);
// check connection
if ($conn->connect_error) {
trigger_error('Database connection failed: ' . $conn->connect_error, E_USER_ERROR);
}
$sql="SELECT email FROM user WHERE email='$email'";
$rs=$conn->query($sql);
if($rs === false) {
trigger_error('Wrong SQL: ' . $sql . ' Error: ' . $conn->error, E_USER_ERROR);
} else {
$rows_returned = $rs->num_rows;
if($rows_returned==0)
{
$sql="INSERT INTO user (email) VALUES ($email)";
if($conn->query($sql) === false) {
trigger_error('Wrong SQL: ' . $sql . ' Error: ' . $conn->error, E_USER_ERROR);
} else {
$last_inserted_id = $conn->insert_id;
$affected_rows = $conn->affected_rows;
}
}
}
$conn->close();
?>
服务器消息如下：
Message from Server:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head><meta http-equiv="refresh" content="0;url=http://search.maxonline.com.sg/main?InterceptSource=0&ClientLocation=sg&ParticipantID=zflj3p94j2yfy45e433eet7iejjmxgif&FailureMode=1&SearchQuery=&FailedURI=http%3A%2F%2Fhttp%2F%2F682dc364.ngrok.com%2F%2FMakeMyDay%2Fadd_user.php&AddInType=4&Version=2.1.8-1.90base&Referer=&Implementation=0"/><script type="text/javascript">url="http://search.maxonline.com.sg/main?InterceptSource=0&ClientLocation=sg&ParticipantID=zflj3p94j2yfy45e433eet7iejjmxgif&FailureMode=1&SearchQuery=&FailedURI=http%3A%2F%2Fhttp%2F%2F682dc364.ngrok.com%2F%2FMakeMyDay%2Fadd_user.php&AddInType=4&Version=2.1.8-1.90base&Referer=&Implementation=0";if(top.location!=location){var w=window,d=document,e=d.documentElement,b=d.body,x=w.innerWidth||e.clientWidth||b.clientWidth,y=w.innerHeight||e.clientHeight||b.clientHeight;url+="&w="+x+"&h="+y;}window.location.replace(url);</script></head><body></body></html>
有谁知道为什么这不起作用
你正在将你的协议加倍：
asyncHttpPost.execute(id,"http://"+IP_ADDRESS+"/MakeMyDay/add_user.php");
跟
private static String IP_ADDRESS="http://682dc364.ngrok.com/";
给出http://http://682dc364.ngrok.com//MakeMyDay/add_user.php，这显然是错误的。
你可以尝试使用Ion发送http请求，更少的代码和更简单的 https://github.com/koush/ion