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[英]Sending an HTTP POST request through the android emulator doesn't work
[英]Android Http POST request doesen't work
我有這個Android代碼:
package com.example.webtestconnection;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
private Button login;
private EditText username, password;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
login = (Button) findViewById(R.id.ok);
username = (EditText) findViewById(R.id.name);
password = (EditText) findViewById(R.id.password);
login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String mUsername = username.getText().toString();
String mPassword = password.getText().toString();
tryLogin(mUsername, mPassword);
}
});
}
protected void tryLogin(String mUsername, String mPassword)
{
HttpURLConnection connection;
OutputStreamWriter request = null;
URL url = null;
String response = null;
String parameters = "username="+mUsername+"&password="+mPassword;
try
{
url = new URL("http://welovelamacompany.altervista.org/test2.php");
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();
// You can perform UI operations here
Toast.makeText(this,"Message from Server: \n"+ response, Toast.LENGTH_LONG).show();
isr.close();
reader.close();
}
catch(IOException e)
{
// Error
}
}
}
這是php頁面代碼:
<?php
//impostazioni server phpmyadmin per poter accedere al db
$servername = "servername";
$username = "username";
$password = "password";
$databasename = "my_databasename";
$Nome_Giocatore = $_POST['username'];
$PasswordGiocatore = $_POST['password'];
try {
$conn = new PDO("mysql:host=$servername;dbname=$databasename", $username, $password);
//imposto una modalità di eccezzione errore
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
//stampo che la connessione è riuscita
$sql=$conn->query("SELECT Password_Giocatore FROM Giocatori WHERE Nome_Giocatore=\"$Nome_Giocatore\"");
$control = $sql->fetch();
$controllo=$control['Password_Giocatore'];
if (password_verify($PasswordGiocatore, $controllo)){
echo "Success";
} else {
echo "Error";
}
$conn->exec($sql);
} catch(PDOException $e){
//stampo che la connessione è fallita e l'errore che ha causato il fallimento
echo "Qualcosa è andato storto :(. Errore: <br/>".$e->getMessage();
}
$conn = null;
?>
但是當我運行它時,它給了我這個錯誤:
E / AndroidRuntime:致命例外:主進程:com.example.webtestconnection,PID:23550 android.os.NetworkOnMainThreadException at android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1166)at java.net.InetAddress.lookupHostByName( InetAddress.java:385)(位於java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)位於java.net.InetAddress.getAllByName(InetAddress.java:214)位於com.android.okhttp.internal.Dns $ 1.getAllByName( com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)處的com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)處的Dns.java:28) com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:343)位於com.android.okhttp.internal.http處的.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:390) com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)上的.HttpEngine.sendRequest(HttpEngine.java:289) com.example.webtestconnection.MainActivity.tryLogin(MainActivity)上的com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:197)上的p.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:89) com.example.webtestconnection.MainActivity $ 1.onClick(MainActivity.java:40)處的com.example.webtestconnection.MainClick(MainActivity.java:40)處android.view.View $ PerformClick.run(View.java處的Java.4633)的android.os.Handler.handleCallback(Handler.java:733)的java:19270),android.os.Looper.loop(Looper.java:136)的android.os.Handler.dispatchMessage(Handler.java:95)的com.android的java.lang.reflect.Method.invokeNative(本機方法)處的android.app.ActivityThread.main(ActivityThread.java:5476)。 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)上的internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1283)(dalvik.system.NativeStart.main(本機方法))
為什么? 我該如何解決? 感謝幫助
附言:清單中我有互聯網許可
請使用AsyncTask進行API調用,因為您正在MainThread上調用它,所以您正在獲取異常。
class LoginTask extends AsyncTask<String, Void, RSSFeed> {
private Exception exception;
protected YourResponse doInBackground(String... urls) {
try {
URL url = new URL(urls[0]);
//your login code
} catch (Exception e) {
this.exception = e;
}
}
protected void onPostExecute(YourResponse response) {
// TODO: check this.exception
// TODO: do something with the feed
}
}
並在代碼中添加此行
new LoginTask().execute(url);
編輯您可以在下面的庫中進行網絡通話,更輕松且針對網絡通話進行了優化
您正在嘗試在主線程上運行http連接。 絕對禁止在Android中執行此操作,因為這會破壞應用程序的響應能力。 您應該將連接運行到AsyncTask中
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