CODEWITHSUNDEEP
javaandroid
acoder
acoder

Reputation: 249

android java.net.ProtocolException: Connection already established

public static Bitmap getImage(String address) throws Exception {

    Bitmap imgmap = null;
    InputStream is = null;

    URL url = new URL(address);

    HttpURLConnection  conn = (HttpURLConnection)url.openConnection();
    try {
        conn.setRequestMethod("GET"); >>> here was been excuted,but go to finally block
        conn.setConnectTimeout(5000); 
        is = conn.getInputStream();
        byte[] imgbytes = StreamTool.getBytes(is);
        imgmap = BitmapFactory.decodeByteArray(imgbytes, 0, imgbytes.length);

    } finally {
        if (is != null) {
            is.close();
        }
        if (conn != null) {
            conn.disconnect();
        }
    }

    return imgmap;
}

before conn.setRequestMethod("GET") was excuted,thorws the exception Connection already established. who can give me a solution

Upvotes: 1

Views: 6160

Answers (5)

Leo Paim
Leo Paim

Reputation: 500

This is happening because you're connecting before setting the request method

A suggest you try this:

conn.setRequestMethod("GET");
conn.connect);
conn.setConnectTimeout(5000); 
is = conn.getInputStream();
byte[] imgbytes = StreamTool.getBytes(is);

Upvotes: 0

Runzhi Guo
Runzhi Guo

Reputation: 1

Experienced same, find out the IDE is watching a field of the connection which I have added to debug, then cause the connection get established before other code run like set properties.

So if you want to get some "properties" before connection is ready during debug, you will get this error

Upvotes: 0

Vahid Ghadiri
Vahid Ghadiri

Reputation: 4076

I know it is completely nonsense. But it happens for me in debug mode when I put break point on this line.

con.setRequestMethod()

As soon as I removed the break point, the error has gone!

Upvotes: 7

Will Calderwood
Will Calderwood

Reputation: 4636

When you create an instance of HttpURLConnection it defaults to the request method GET so there is no need to call setRequestMethod in this instance.

This link contains some fantastic detail about HTTP connections and how to use them.

Upvotes: 0

Tejas
Tejas

Reputation: 585

Thats because the function setRequestMethod() has to be called before the connection is made. Check this link

http://developer.android.com/reference/java/net/HttpURLConnection.html#setRequestMethod(java.lang.String)

So better call it before openConnection(). Or dont call it at all.

Upvotes: -3

Related Questions