我正在尝试将登录信息发送到服务器，然后在登录后检查。我可以向服务器发送信息，但我没有收到回复并提供任何登录详细信息，并收到我的用户名密码是否正常的消息。
这是我的登录活动：
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
public class LoginActivity extends AppCompatActivity {
ImageView icon_image;
ImageView login_image;
EditText user_email_editText;
EditText user_login_password_editText;
Button remember_me_button;
Button forget_password_button;
Button sign_up_button;
String userLoginEmail;
String userLoginPassword;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
icon_image =(ImageView)findViewById(R.id.icon_imageView_id);
login_image=(ImageView)findViewById(R.id.imageView_login_id);
user_email_editText =(EditText)findViewById(R.id.user_login_email_id);
user_login_password_editText =(EditText)findViewById(R.id.login_password);
remember_me_button=(Button)findViewById(R.id.remember_me_id);
forget_password_button=(Button)findViewById(R.id.forget_password_id);
sign_up_button=(Button)findViewById(R.id.sign_up_button_id);
ConnectivityManager connectivityManager= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo();
if(networkInfo==null ){
Toast.makeText(getApplicationContext(),"Please Connect to Internet",Toast.LENGTH_LONG).show();
}
login_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent mainToSignUpIntent = new Intent(getApplicationContext(), SignUPActivity.class);
startActivity(mainToSignUpIntent);
String userLoginEmail=user_email_editText.getText().toString();
String userLoginPassword=user_login_password_editText.getText().toString();
String method="login";
BackgroundTask backgroundTask=new BackgroundTask(getApplicationContext());
backgroundTask.execute(method,userLoginEmail, userLoginPassword);
}
});
sign_up_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
userLoginEmail =user_email_editText.getText().toString();
userLoginPassword=user_login_password_editText.getText().toString();
String method= "register";
BackgroundTask backgroundTask=new BackgroundTask(getApplicationContext());
backgroundTask.execute(method,userLoginEmail, userLoginPassword);
}
});
}
class BackgroundTask extends AsyncTask<String, Void, String> {
AlertDialog alertDialog;
Context context;
String reg_url;
BackgroundTask(Context context){
this.context=context;
}
@Override
protected void onPreExecute() {
reg_url="http://systechdigital.com/friendLocation/index.php";
alertDialog=new AlertDialog.Builder(context).create();
}
@Override
protected String doInBackground(String... args) {
String method=args[0];
if(method.equals("register")){
String userLoginEmail=args[1];
String UserLoginPassword= args[2];
try {
URL url=new URL(reg_url);
HttpURLConnection httpURLConnection=(HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
OutputStream outputStream=httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter=new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
String dataString= URLEncoder.encode("userLoginEmail", "UTF-8")+"="+URLEncoder.encode(userLoginEmail,"UTF-8")+"&"+
URLEncoder.encode("userLoginPassword","UTF-8")+"="+URLEncoder.encode(userLoginPassword,"UTF-8");
bufferedWriter.write(dataString);
bufferedWriter.flush();
bufferedWriter.close();
InputStream inputStream=httpURLConnection.getInputStream();
inputStream.close();
httpURLConnection.disconnect();
return "you are registered";
}
catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
else if(method.equals("login")){
String userLoginEmail=args[1];
String UserLoginPassword= args[2];
try {
URL url=new URL(reg_url);
HttpURLConnection httpURLConnection= (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream=httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter=new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
String dataString= URLEncoder.encode("userLoginEmail", "UTF-8")+"="+URLEncoder.encode(userLoginEmail,"UTF-8")+"&"+
URLEncoder.encode("userLoginPassword","UTF-8")+"="+URLEncoder.encode(userLoginPassword,"UTF-8");
bufferedWriter.write(dataString);
bufferedWriter.flush();
bufferedWriter.close();
InputStream inputStream=httpURLConnection.getInputStream();
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
String response=" ";
String line=" ";
while ((line=bufferedReader.readLine())!=null){
response+=line;
inputStream.close();
httpURLConnection.disconnect();
return response;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(String result) {
if(result.equals("you are registered")) {
Toast.makeText(context, result, Toast.LENGTH_SHORT).show();
}
else {
alertDialog.setMessage(result);
}
}
}
}