pacchetto org.apache.http.client non esiste

Question

Sto provando a verificare le credenziali di accesso, ma sto ricevendo questi errori ancora e ancora, ho provato di tutto. Sono nuovo di Android Qualsiasi tipo di aiuto sarà apprezzato. Se non v'è altro buon modo per implementare stesso, vogliono sapere come implica

errore

Error:(19, 30) error: package org.apache.http.client does not exist 
Error:(15, 23) error: package org.apache.http does not exist 
Error:(16, 23) error: package org.apache.http does not exist 
Error:(17, 23) error: package org.apache.http does not exist 
Error:(18, 30) error: package org.apache.http.client does not exist 
Error:(20, 37) error: package org.apache.http.client.entity does not exist 
Error:(21, 38) error: package org.apache.http.client.methods does not exist 
Error:(22, 35) error: package org.apache.http.impl.client does not exist 
Error:(23, 31) error: package org.apache.http.message does not exist 
Error:(79, 22) error: cannot find symbol class NameValuePair 
Error:(85, 49) error: cannot find symbol class DefaultHttpClient 
Error:(86, 21) error: cannot find symbol class HttpPost 
Error:(86, 45) error: cannot find symbol class HttpPost 
Error:(88, 44) error: cannot find symbol class UrlEncodedFormEntity 
Error:(90, 21) error: cannot find symbol class HttpResponse 
Error:(92, 21) error: cannot find symbol class HttpEntity 
Error:(105, 26) error: cannot find symbol class ClientProtocolException 
Error:Execution failed for task ':app:compileDebugJavaWithJavac'. 
> Compilation failed; see the compiler error output for details. 
Error:(85, 21) error: cannot find symbol class HttpClient 
Error:(81, 40) error: cannot find symbol class BasicNameValuePair 
Error:(80, 40) error: cannot find symbol class BasicNameValuePair 
Error:(79, 68) error: cannot find symbol class NameValuePair  

MainActivity.java

package com.tarun.proxy_maar; 

import android.app.Dialog; 
import android.app.ProgressDialog; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.EditText; 
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.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.UnsupportedEncodingException; 
import java.util.ArrayList; 
import java.util.List; 


public class MainActivity extends AppCompatActivity { 

    private EditText editTextUserName; 
    private EditText editTextPassword; 

    public static final String USER_NAME = "USERNAME"; 

    String username; 
    String password; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     editTextUserName = (EditText) findViewById(R.id.editTextUserName); 
     editTextPassword = (EditText) findViewById(R.id.editTextPassword); 
    } 

    public void invokeLogin(View view){ 
     username = editTextUserName.getText().toString(); 
     password = editTextPassword.getText().toString(); 

     login(username,password); 

    } 

    private void login(final String username, String password) { 

     class LoginAsync extends AsyncTask<String, Void, String>{ 

      private Dialog loadingDialog; 

      @Override 
      protected void onPreExecute() { 
       super.onPreExecute(); 
       loadingDialog = ProgressDialog.show(MainActivity.this, "Please wait", "Loading..."); 
      } 

      @Override 
      protected String doInBackground(String... params) { 
       String uname = params[0]; 
       String pass = params[1]; 

       InputStream is = null; 
       List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
       nameValuePairs.add(new BasicNameValuePair("username", uname)); 
       nameValuePairs.add(new BasicNameValuePair("password", pass)); 
       String result = null; 

       try{ 
        HttpClient httpClient = new DefaultHttpClient(); 
        HttpPost httpPost = new HttpPost(
          "http://shaadi.web44.net/hello.php"); 
        httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

        HttpResponse response = httpClient.execute(httpPost); 

        HttpEntity entity = response.getEntity(); 

        is = entity.getContent(); 

        BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"), 8); 
        StringBuilder sb = new StringBuilder(); 

        String line = null; 
        while ((line = reader.readLine()) != null) 
        { 
         sb.append(line + "\n"); 
        } 
        result = sb.toString(); 
       } catch (ClientProtocolException e) { 
        e.printStackTrace(); 
       } catch (UnsupportedEncodingException e) { 
        e.printStackTrace(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
       return result; 
      } 

      @Override 
      protected void onPostExecute(String result){ 
       String s = result.trim(); 
       loadingDialog.dismiss(); 
       if(s.equalsIgnoreCase("success")){ 
        Intent intent = new Intent(MainActivity.this, UserProfile.class); 
        intent.putExtra(USER_NAME, username); 
        finish(); 
        startActivity(intent); 
       }else { 
        Toast.makeText(getApplicationContext(), "Invalid User Name or Password", Toast.LENGTH_LONG).show(); 
       } 
      } 
     } 

     LoginAsync la = new LoginAsync(); 
     la.execute(username, password); 

    } 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, 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) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
} 

Answer 1

aggiungere che, per il vostro build.gradle:

android { 
    useLibrary 'org.apache.http.legacy' 
} 

Oppure utilizzare lo HttpURLConnection class.

Answer 2

I DefaultHttpClient e NameValuePair classi sono stati deprecati a livello di API 22, e rimossi nel livello di API 23.

Google anche preso giù la documentazione per loro.

Quando la documentazione era ancora attiva, si consigliava di passare a HttpUrlConnection per attività di base come questa.

Ecco una versione modificata del vostro AsyncTask che funziona a livello di API 23:

class LoginAsync extends AsyncTask<String, Void, String>{ 

     private Dialog loadingDialog; 
     String url = "http://shaadi.web44.net/hello.php"; 

     String charset = "UTF-8"; 
     HttpURLConnection conn; 
     DataOutputStream wr; 
     StringBuilder result = new StringBuilder(); 
     URL urlObj; 
     JSONObject jObj = null; 
     StringBuilder sbParams; 
     String paramsString; 

     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      loadingDialog = ProgressDialog.show(MainActivity.this, "Please wait", "Loading..."); 
     } 

     @Override 
     protected String doInBackground(String... params) { 
      String uname = params[0]; 
      String pass = params[1]; 

      sbParams = new StringBuilder(); 

      try { 
       sbParams.append("name").append("=") 
         .append(URLEncoder.encode(uname, charset)); 
       sbParams.append("&"); 
       sbParams.append("password").append("=") 
         .append(URLEncoder.encode(pass, charset)); 
      } catch (UnsupportedEncodingException e) { 
       e.printStackTrace(); 
      } 

      try { 
       urlObj = new URL(url); 

       conn = (HttpURLConnection) urlObj.openConnection(); 

       conn.setDoOutput(true); 

       conn.setRequestMethod("POST"); 

       conn.setRequestProperty("Accept-Charset", charset); 

       conn.setReadTimeout(10000); 
       conn.setConnectTimeout(15000); 

       conn.connect(); 

       paramsString = sbParams.toString(); 

       wr = new DataOutputStream(conn.getOutputStream()); 
       wr.writeBytes(paramsString); 
       wr.flush(); 
       wr.close(); 

      } catch (IOException e) { 
       e.printStackTrace(); 
      } 

      try { 
       //response from the server 
       InputStream in = new BufferedInputStream(conn.getInputStream()); 
       BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 

       String line; 
       while ((line = reader.readLine()) != null) { 
        result.append(line); 
       } 


      } catch (IOException e) { 
       e.printStackTrace(); 
      } 

      conn.disconnect(); 

      return result.toString(); 
     } 

     @Override 
     protected void onPostExecute(String result){ 
      String s = result.trim(); 
      loadingDialog.dismiss(); 
      if(s.equalsIgnoreCase("success")){ 
       Intent intent = new Intent(MainActivity.this, UserProfile.class); 
       intent.putExtra(USER_NAME, username); 
       finish(); 
       startActivity(intent); 
      }else { 
       Toast.makeText(getApplicationContext(), "Invalid User Name or Password", Toast.LENGTH_LONG).show(); 
      } 
     } 
    } 

codice della classe completa:

import android.app.Dialog; 
import android.app.ProgressDialog; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.Toast; 
import org.json.JSONObject; 
import java.io.BufferedInputStream; 
import java.io.BufferedReader; 
import java.io.DataOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.UnsupportedEncodingException; 
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.net.URLEncoder; 

public class MainActivity extends AppCompatActivity { 

    private EditText editTextUserName; 
    private EditText editTextPassword; 

    public static final String USER_NAME = "USERNAME"; 

    String username; 
    String password; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     editTextUserName = (EditText) findViewById(R.id.editTextUserName); 
     editTextPassword = (EditText) findViewById(R.id.editTextPassword); 
    } 

    public void invokeLogin(View view){ 
     username = editTextUserName.getText().toString(); 
     password = editTextPassword.getText().toString(); 

     login(username,password); 

    } 

    private void login(final String username, String password) { 

     class LoginAsync extends AsyncTask<String, Void, String>{ 

      private Dialog loadingDialog; 
      String url = "http://shaadi.web44.net/hello.php"; 

      String charset = "UTF-8"; 
      HttpURLConnection conn; 
      DataOutputStream wr; 
      StringBuilder result = new StringBuilder(); 
      URL urlObj; 
      JSONObject jObj = null; 
      StringBuilder sbParams; 
      String paramsString; 

      @Override 
      protected void onPreExecute() { 
       super.onPreExecute(); 
       loadingDialog = ProgressDialog.show(MainActivity.this, "Please wait", "Loading..."); 
      } 

      @Override 
      protected String doInBackground(String... params) { 
       String uname = params[0]; 
       String pass = params[1]; 

       sbParams = new StringBuilder(); 

       try { 
        sbParams.append("name").append("=") 
          .append(URLEncoder.encode(uname, charset)); 
        sbParams.append("&"); 
        sbParams.append("password").append("=") 
          .append(URLEncoder.encode(pass, charset)); 
       } catch (UnsupportedEncodingException e) { 
        e.printStackTrace(); 
       } 

       try { 
        urlObj = new URL(url); 

        conn = (HttpURLConnection) urlObj.openConnection(); 

        conn.setDoOutput(true); 

        conn.setRequestMethod("POST"); 

        conn.setRequestProperty("Accept-Charset", charset); 

        conn.setReadTimeout(10000); 
        conn.setConnectTimeout(15000); 

        conn.connect(); 

        paramsString = sbParams.toString(); 

        wr = new DataOutputStream(conn.getOutputStream()); 
        wr.writeBytes(paramsString); 
        wr.flush(); 
        wr.close(); 

       } catch (IOException e) { 
        e.printStackTrace(); 
       } 

       try { 
        //response from the server 
        InputStream in = new BufferedInputStream(conn.getInputStream()); 
        BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 

        String line; 
        while ((line = reader.readLine()) != null) { 
         result.append(line); 
        } 


       } catch (IOException e) { 
        e.printStackTrace(); 
       } 

       conn.disconnect(); 

       return result.toString(); 
      } 

      @Override 
      protected void onPostExecute(String result){ 
       String s = result.trim(); 
       loadingDialog.dismiss(); 
       if(s.equalsIgnoreCase("success")){ 
        Intent intent = new Intent(MainActivity.this, UserProfile.class); 
        intent.putExtra(USER_NAME, username); 
        finish(); 
        startActivity(intent); 
       }else { 
        Toast.makeText(getApplicationContext(), "Invalid User Name or Password", Toast.LENGTH_LONG).show(); 
       } 
      } 
     } 

     LoginAsync la = new LoginAsync(); 
     la.execute(username, password); 

    } 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, 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) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
}