Question

我正在进行一项登录活动，该活动需要两个参数id和密码。我通过服务器上的php API检查它，它在正确的登录凭据上响应Success。如果我的textview（命名结果）上有text =“Success”，我想切换活动，它不起作用。我还尝试通过在请求队列添加下面（注释）后保持检查，仍然无法正常工作。如果我的方法不正确，请告诉我实现此任务的最简单方法。

package com.example.nigam.quiz;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

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

import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

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


        Button login=(Button)findViewById(R.id.button);
        Button register=(Button)findViewById(R.id.button5);
        final EditText userid = (EditText) findViewById(R.id.editText);
        final EditText password= (EditText) findViewById(R.id.editText2);
        final TextView result=(TextView)findViewById(R.id.textView);
        Button startq= (Button) findViewById(R.id.button3);
        final String url="http://192.168.44.223/Quiz/login.php";
        final RequestQueue requestQueue= Volley.newRequestQueue(getApplicationContext());
        login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final JSONObject jsonObject = new  JSONObject();
                try {
                    jsonObject.put("userid",userid.getText().toString());
                    jsonObject.put("password",password.getText().toString());
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                StringRequest stringRequest=new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                       result.setText(response.toString());

                       if(result.getText().toString()=="Success")
                       {
                           Intent i=new Intent(MainActivity.this,Begins.class);
                           startActivity(i);
                       }

                    }
                }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {

                    }
                })
                {
                    protected Map<String,String> getParams() throws AuthFailureError{
                        Map<String,String> parameters = new HashMap<String,String>();
                        parameters.put("creden",jsonObject.toString());
                        return parameters;

                    }

                };

                requestQueue.add(stringRequest);
                /*
                 if(result.getText().toString()=="Success")
                       {
                           Intent i=new Intent(MainActivity.this,Begins.class);
                           startActivity(i);
                       }
                 */

            }
        });

        startq.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent i=new Intent(MainActivity.this,Begins.class);
                startActivity(i);
            }
        });


        register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent i=new Intent(MainActivity.this,Main2Activity.class);
                startActivity(i);
            }
        });



    }
}

Answer 1

尝试使用.equals（）来比较字符串。

切换服务器响应活动

1 个答案: