HTTPsURLConnection ile Android nasıl bağlanır

Question

Şimdi bir süredir kodları çözmeye çalışıyorum, ancak hiç başarı elde edemedim. Uygulama her rastgele bir istisna atılarak çöküyor.

Bu kodu youtube'daki bir öğreticiden öğrendim ve buna rağmen kod benim için çalışmıyor.

import android.content.Context; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.os.AsyncTask; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 
import android.widget.Toast; 

import org.w3c.dom.Text; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.nio.Buffer; 

import javax.net.ssl.HttpsURLConnection; 

public class MainActivity extends AppCompatActivity { 
Button b1; 
TextView t1; 
private Context context; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    b1=(Button)findViewById(R.id.bthhit); 
    t1=(TextView)findViewById(R.id.tvJSONitem); 

    b1.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      new JSONTask().execute("http://jsonparsing.parseapp.com/jsonData/moviesDemoItem.txt"); 
     } 
    }); 

} 

public class JSONTask extends AsyncTask<String,String,String>{ 
    HttpsURLConnection connection = null; 
    BufferedReader reader = null; 

    @Override 
    protected String doInBackground(String... params) { 

     try { 
      URL url=new URL(params[0]); 
      connection= (HttpsURLConnection)url.openConnection(); 
      connection.connect(); 

      InputStream stream= connection.getInputStream(); 

      reader = new BufferedReader(new InputStreamReader(stream)); 
      String line; 
      StringBuffer buffer= new StringBuffer(); 
      while((line=reader.readLine())!=null){ 
       buffer.append(line); 
      } 

      return buffer.toString(); 

     } catch (IOException e) { 
      e.printStackTrace(); 
     } finally { 
      if(connection!=null) { 
       connection.disconnect(); 
      } 
      try { 
       if(reader!=null){ 
        reader.close(); 
       } 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
     return null; 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     super.onPostExecute(result); 
     t1.setText(result); 

    } 
} 
} 

Logcat bunu gösterir:

01-05 00:46:09.018 5573-5580/? E/art: Failed sending reply to debugger: Broken pipe 
01-05 00:46:17.852 5573-5706/com.example.test.jsonparser E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1 
    Process: com.example.test.jsonparser, PID: 5573 
    java.lang.RuntimeException: An error occurred while executing doInBackground() 
     at android.os.AsyncTask$3.done(AsyncTask.java:309) 
     at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354) 
     at java.util.concurrent.FutureTask.setException(FutureTask.java:223) 
     at java.util.concurrent.FutureTask.run(FutureTask.java:242) 
     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
     at java.lang.Thread.run(Thread.java:818) 
    Caused by: java.lang.ClassCastException: com.android.okhttp.internal.huc.HttpURLConnectionImpl cannot be cast to javax.net.ssl.HttpsURLConnection 
     at com.example.test.jsonparser.MainActivity$JSONTask.doInBackground(MainActivity.java:58) 
     at com.example.test.jsonparser.MainActivity$JSONTask.doInBackground(MainActivity.java:49) 
     at android.os.AsyncTask$2.call(AsyncTask.java:295) 
     at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)  
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)  
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)  
     at java.lang.Thread.run(Thread.java:818)  
01-05 00:46:19.104 5573-5587/com.example.test.jsonparser E/Surface: getSlotFromBufferLocked: unknown buffer: 0xab792110 

Answer 1

URL protokolü HTTP değil HTTPS olduğuna dikkat edin. Bir java.net.HttpURLConnection nesnesini veya "https: // ..." URL'sini kullanmayı deneyin.

Answer 2

Eğer üst sınıf için olduğundan, istisna bu tür tanıtan kaçınacaktır .getResponseCode() ya ... o zaman sen de jenerik URLConnection sınıfını kullanabilirsiniz, uygulamanızda gerekli değildir gibi bazı özel yöntemler Her ikisi de HttpURLConnection ve Https ... sınıfları.