如何解决Android studio中的错误URL

Question

我正在android studio中创建一个简单的应用程序，用于使用Volley库管理通过wifi连接的设备。当我运行应用程序时，我得到以下错误。

java.lang.RuntimeException：错误URL 192.168.137.139:8081/Zeroconf/switch在com.android.volle.toolbox.basicnetwork.performRequest（basicnetwork.java:171)在com.android.volle.networkdispatcher.processRequest（networkdispatcher.run（networkdispatcher.run（networkdispatcher.java:120)在com.android.volle.networkdispatcher.java:87)由：在com.android.volle.networkdispatcher.run（networkdispatcher.java:87) 

我该怎么解决？

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.SwitchCompat;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

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.StringRequest;
import com.android.volley.toolbox.Volley;

import java.text.BreakIterator;

public class MainActivity extends AppCompatActivity {
    private static final String TAG = MainActivity.class.getName();
    SwitchCompat switchButton;
    LinearLayout imageViewLight;
    private RequestQueue mRequestQueue;
    TextView buttonState;
    private StringRequest mStringRequest;
    private String url = "192.168.137.139:8081/zeroconf/switch";

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

        switchButton=findViewById(R.id.switchButton);
        imageViewLight=findViewById(R.id.linearL);
        TextView buttonState;
        buttonState = findViewById(R.id.buttonState);

        switchButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                sendAndRequestResponse();                
            }
        });
    }

    private void sendAndRequestResponse() {
        mRequestQueue = Volley.newRequestQueue(this);
        mStringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                TextView myTextView;
                if (switchButton.isChecked()) {
                    imageViewLight.setBackgroundResource(R.drawable.light__02);
                    buttonState.setText("State : ON");
                } else {
                    imageViewLight.setBackgroundResource(R.drawable.light__01);
                    buttonState.setText("State : OFF");
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

                Log.i(TAG,"Error :" + error.toString());
            }
        });

        mRequestQueue.add(mStringRequest);  

    }
}

Answer 1

我遇到了一个类似的问题，通过在java端调用mopub.initializesdk（）解决了这个问题。