Question

所以从前面的一个问题我添加了一些新的依赖项到我的Gradle属性以允许HttpGetRequest命令等。但是现在我的代码中还有其他错误，我认为我添加的新依赖项与JSON不兼容声明。您能否请一看，看看这些依赖项是否破坏了我的代码？

Gradle Dependencies

dependencies {
compile group: 'org.apache.httpcomponents' , name: 'httpclient-android' , version: '4.3.5.1'
compile group: 'cz.msebera.android' , name: 'httpclient', version: '4.4.1.1'
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
}

我的LoginActivity代码：

package com.example.george.youdecide;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

import cz.msebera.android.httpclient.NameValuePair;
import cz.msebera.android.httpclient.message.BasicNameValuePair;


public class LoginActivity extends Activity implements OnClickListener {
    // Initializing variables
    private EditText user, pass;
    private ImageView mSubmit, mRegister;

    // Progress Dialog
    private ProgressDialog pDialog;

    // JSON parser class
    JSONParser jsonParser = new JSONParser();


    //Localhost URL stuff goes here
    private static final String LOGIN_URL = "http://172.18.5.215/webservice/login.php";

    //JSON element ids from repsonse of php script:
    private static final String TAG_SUCCESS = "success";
    private static final String TAG_MESSAGE = "message";


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

        //setup input fields
        user = (EditText)findViewById(R.id.usernameLogin);
        pass = (EditText)findViewById(R.id.passwordLogin);

        //setup buttons
        mSubmit = (ImageView) findViewById(R.id.loginButton);

        //register listeners
        mSubmit.setOnClickListener((OnClickListener) this);

    }


    @Override
    public void onClick(View v) {
        // determine which button was pressed:
        switch (v.getId()) {
            case R.id.loginButton:
                new AttemptLogin().execute();
                break;
            //case R.id.register:
              //  Intent i = new Intent(this, Register.class);
                //startActivity(i);
               // break;

            default:
                break;
        }
    }

    class AttemptLogin extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        boolean failure = false;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(LoginActivity.this);
            pDialog.setMessage("Attempting login...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        @Override
        protected String doInBackground(String... args) {
            // TODO Auto-generated method stub
            // Check for success tag
            //user.getText method error here
            int success;
            String username = user.getText().toString();
            String password = pass.getText().toString();
            try {
                // Building Parameters
                List<NameValuePair> params = new ArrayList<NameValuePair>();
                params.add(new BasicNameValuePair("username", username));
                params.add(new BasicNameValuePair("password", password));

                Log.d("request!", "starting");
                // getting product details by making HTTP request
                //Parameter errors here
                JSONObject json = jsonParser.getJSONFromUrl(
                        LOGIN_URL, "POST", params);

                // check your log for json response
                Log.d("Login attempt", json.toString());

                // json success tag
                success = json.getInt(TAG_SUCCESS);
                if (success == 1) {
                    Log.d("Login Successful!", json.toString());
                    Intent i = new Intent(LoginActivity.this, MainActivity.class);
                    finish();
                    startActivity(i);
                    return json.getString(TAG_MESSAGE);
                }else{
                    Log.d("Login Failure!", json.getString(TAG_MESSAGE));
                    return json.getString(TAG_MESSAGE);

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

            return null;

        }
        /**
         * Get rid of progress dialog
         * **/
        protected void onPostExecute(String file_url) {
            // dismiss the dialog once product deleted
            pDialog.dismiss();
            if (file_url != null){
                Toast.makeText(LoginActivity.this, file_url, Toast.LENGTH_LONG).show();
            }

        }

    }

}

更改依赖关系后，我仍然会遇到代码的这些部分错误。

int success;
            String username = user.getText().toString();
            String password = pass.getText().toString();
            try {

在这里

Log.d("request!", "starting");
                // getting product details by making HTTP request
                JSONObject json = jsonParser.makeHttpRequest(
                        LOGIN_URL, "POST", params);

Answer 1

使用：

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

而不是：

compile group: 'org.apache.httpcomponents' , name: 'httpclient-android' , version: '4.3.5.1'
compile group: 'cz.msebera.android' , name: 'httpclient', version: '4.4.1.1'

Android登录活动未从数据库中获取

1 个答案: