Java 包org.apache.http.client不存在

我正在尝试检查登录凭据，但我一次又一次地收到这些错误，我已经尝试了一切。我不熟悉安卓系统 任何形式的帮助都将不胜感激。如果有其他好的方法来实现同样的功能，你想知道如何暗示吗

错误

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);
    }
}

package com.tarun.proxy_maar；
导入android.app.Dialog；
导入android.app.ProgressDialog；
导入android.content.Intent；
导入android.os.AsyncTask；
导入android.os.Bundle；
导入android.support.v7.app.AppActivity；
导入android.view.Menu；
导入android.view.MenuItem；
导入android.view.view；
导入android.widget.EditText；
导入android.widget.Toast；
导入org.apache.http.HttpEntity；
导入org.apache.http.HttpResponse；
导入org.apache.http.NameValuePair；
导入org.apache.http.client.ClientProtocolException；
导入org.apache.http.client.HttpClient；
导入org.apache.http.client.entity.UrlEncodedFormEntity；
导入org.apache.http.client.methods.HttpPost；
导入org.apache.http.impl.client.DefaultHttpClient；
导入org.apache.http.message.BasicNameValuePair；
导入java.io.BufferedReader；
导入java.io.IOException；
导入java.io.InputStream；
导入java.io.InputStreamReader；
导入java.io.UnsupportedEncodingException；
导入java.util.ArrayList；
导入java.util.List；
公共类MainActivity扩展了AppCompatActivity{
私有EditText editTextUserName；
私人编辑文本编辑密码；
公共静态最终字符串USER\u NAME=“USERNAME”；
字符串用户名；
字符串密码；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
editTextUserName=（EditText）findViewById（R.id.editTextUserName）；
editTextPassword=（EditText）findViewById（R.id.editTextPassword）；
}
公共void invokeLogin（视图）{
username=editTextUserName.getText（）.toString（）；
password=editTextPassword.getText（）.toString（）；
登录（用户名、密码）；
}
私有无效登录（最终字符串用户名、字符串密码）{
类LoginAsync扩展了AsyncTask{
私有对话框加载对话框；
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
loadingDialog=ProgressDialog.show（MainActivity.this，“请稍候”，“正在加载…”）；
}
@凌驾
受保护的字符串doInBackground（字符串…参数）{
字符串uname=params[0]；
字符串过程=参数[1]；
InputStream=null；
List nameValuePairs=新的ArrayList（）；
添加（新的BasicNameValuePair（“用户名”，uname））；
添加（新的BasicNameValuePair（“密码”，pass））；
字符串结果=null；
试一试{
HttpClient HttpClient=新的DefaultHttpClient（）；
HttpPost HttpPost=新的HttpPost(
"http://shaadi.web44.net/hello.php");
setEntity（新的UrlEncodedFormEntity（nameValuePairs））；
HttpResponse response=httpClient.execute（httpPost）；
HttpEntity=response.getEntity（）；
is=entity.getContent（）；
BufferedReader reader=新的BufferedReader（新的InputStreamReader（is，“UTF-8”），8；
StringBuilder sb=新的StringBuilder（）；
字符串行=null；
而（（line=reader.readLine（））！=null）
{
sb.追加（第+行“\n”）；
}
结果=sb.toString（）；
}捕获（客户端协议例外e）{
e、 printStackTrace（）；
}捕获（不支持的编码异常e）{
e、 printStackTrace（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
}
返回结果；
}
@凌驾
受保护的void onPostExecute（字符串结果）{
字符串s=result.trim（）；
loadingDialog.disclose（）；
如果（s.equalsIgnoreCase（“成功”））{
意向意向=新意向（MainActivity.this、UserProfile.class）；
intent.putExtra（用户名、用户名）；
完成（）；
星触觉（意向）；
}否则{
Toast.makeText（getApplicationContext（），“无效用户名或密码”，Toast.LENGTH_LONG.show（）；
}
}
}
LoginAsync la=新LoginAsync（）；
la.执行（用户名、密码）；
}
@凌驾
公共布尔onCreateOptions菜单（菜单）{
//为菜单充气；这会将项目添加到操作栏（如果存在）。
getMenuInflater（）.充气（右菜单菜单菜单主菜单）；
返回true；
}
@凌驾
公共布尔值onOptionsItemSelected（菜单项项）{
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击，只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId（）；
//noinspection SimplifiableIf语句
if（id==R.id.action\u设置）{
返回true；
}
返回super.onOptionsItemSelected（项目）；
}
}

将其添加到您的build.gradle中：

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

---

或者您使用

HttpURLConnection类

。

DefaultHttpClient

和

NameValuePair

类在API级别22中被弃用，在API级别23中被删除

谷歌甚至为他们记下了文档

当文档仍处于打开状态时，建议切换到

HttpUrlConnection

，以执行以下基本任务：

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

  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();
            }
        }
    }

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);
    }
}