Question

我想在logcat中打印InputStream（用于测试/稍后我将使用它），我目前的代码如下。

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

            try {

                InputStream in = null;
                int response = -1;

                URL url = new URL(
                        "http://any-website.com/search/users/sports+persons");
                URLConnection conn = null;
                HttpURLConnection httpConn = null;
                conn = url.openConnection();

                if (!(conn instanceof HttpURLConnection))
                    throw new IOException("Not an HTTP connection");

                httpConn = (HttpURLConnection) conn;
                httpConn.setAllowUserInteraction(false);
                httpConn.setInstanceFollowRedirects(true);
                httpConn.setRequestMethod("GET");
                httpConn.connect();

                response = httpConn.getResponseCode();
                if (response == HttpURLConnection.HTTP_OK) {
                    in = httpConn.getInputStream();
                }

                if (in != null) {
                    Log.e(TAG, ">>>>>PRINTING<<<<<");
                    Log.e(TAG, in.toString());
                   // TODO: print 'in' from here
                }
                in.close();
                in = null;



            } catch (Exception e) {
                e.printStackTrace();
            }

            return null;
        }

但是我无法做到这一点，所以请检查代码并添加/修改代码来执行此操作。

Answer 1

String convertStreamToString(java.io.InputStream is) {
    try {
        return new java.util.Scanner(is).useDelimiter("\\A").next();
    } catch (java.util.NoSuchElementException e) {
        return "";
    }
}

在您的代码中：

                Log.e(TAG, ">>>>>PRINTING<<<<<");
                Log.e(TAG, in.toString());
                Log.e(TAG, convertStreamToString(in));

Answer 2

你的TAG应该是一个常数：

public final String TAG = YourActivity.class.getSimpleName();

然后你会做类似的事情：

Log.e(TAG, "You're message here:", e)

e是来自打印堆栈的错误。

您还需要确保导入登录Android库。

此外，在查看代码之后，您可能希望用try / catch语句包围httpConnection()，这样您就可以捕获错误，并将其放入日志文件中。如果你的流有东西，或者不是null，你有日志打印，但你想知道你是否没有连接，这会给你一个空值。

希望有所帮助。

Answer 3

Just add this code to if(in != null):   

    byte[] reqBuffer = new byte[1024];
    int reqLen = 1024;
    int read = -1;

    StringBuilder result = new StringBuilder();
    try {
        while ((read = is.read(reqBuffer, 0, reqLen)) >= 0)
            result.append(new String(reqBuffer, 0, read));
    } catch (IOException e) {
        e.printStackTrace();
    } 


Log.d("TAG", result.toString());

在Logcat中打印InputStream

3 个答案: