Aditya Bhavnani Aditya Bhavnani - 1 month ago 5
HTTP Question

How to connect Android with HTTPsURLConnection

I've been trying to figure the code out for quite a while now, however have had no success. Everytime the App crashes by throwing some random exception.

I learnt this code off a tutorial on youtube and despite that, the code doesn't work for me.

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 shows this:

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

Please note that your URL protocol is HTTP and not HTTPS. Try either using a java.net.HttpURLConnection object or a "https://..." URL.

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