Develop Reference

Logs in my code do not display when getting logcat programmatically

My android code contains Log.e. When getting logcat programmatically, those logs are not displayed. My code for logcat is
String command = "logcat MyApp:V";
Process process = Runtime.getRuntime().exec(command);
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
StringBuilder result = new StringBuilder();
String currentLine;
while ((currentLine = reader.readLine()) != null) {
result.append(currentLine);
result.append("\n");
}
Log.e(TAG, "printLog: " + result.toString());

Dont use result.toString.. Instead use resultLog.e(TAG, "printLog: " + result);

HttpURLConnection mobile network

I'm having trouble to connect to a webservice through HttpURLConnection when using 3g (any mobile network). I don't know exactly the problem because when it's on the wifi, it works perfectly. When I check for the errorStream, it says that the buffer length is unknown. Why does it happen only through 3g?
My code is:
if (method_type == 0) {
param = url[0].concat("?identificacao=" + postDataParam.get("identificacao") + "&senha=" + postDataParam.get("senha"));
System.out.println(param);
try{
URL link = new URL(param);
HttpURLConnection e = (HttpURLConnection)link.openConnection();
e.setReadTimeout(15000);
e.setConnectTimeout(15000);
e.setRequestMethod("GET");
e.setRequestProperty("User-Agent", "");
e.setRequestProperty("Authorization", "Basic " + base64CredenciaisCodificadas);
BufferedReader in = new BufferedReader(
new InputStreamReader(e.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
resposta = response.toString();
globalResposta = resposta;
senhaCorreta = Boolean.parseBoolean(separarDados(globalResposta, 0).replace("\"", ""));
} catch(Exception e){
}
}
Before you all ask, I tried changing the User-Agent to Mozilla, AppleWebKit and this stuff. I have also set the permission to access the internet at the manifest.

Android HttpClient response

I'm trying to send json data to a php script from my Android application with HttpClient, and get the response.
Android Code
private void sendPurchase(String SKU) throws IOException{
Log.e("sendPurchase","Inside sendPurchase");
final SharedPreferences prefs = getGCMPreferences(getApplicationContext());
int pur_user = prefs.getInt("C_user", Integer.MIN_VALUE);
InputStream inputStream = null;
String result = "";
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://www.*.com/includes/purchase.php");
JSONObject json = new JSONObject();
try {
json.put("PUR_sku", SKU);
json.put("PUR_user", pur_user);
} catch (JSONException e) { Log.e("SendPurchase","Problem with Json Object"); }
Log.i("JSONObject", json.toString());
StringEntity se = new StringEntity(json.toString(), HTTP.UTF_8);
httpPost.setEntity(se);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
HttpResponse httpResponse = httpclient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
if(inputStream != null){ result = convertInputStreamToString(inputStream); }
else{result = "Did not work!"; }
Log.e("RESULT",result);
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
And the PHP script
<?
$auth=0;
require('./connexion.php');
$data = file_get_contents('php://input');
//$data = '{"PUR_sku":"singleone","PUR_user":"3"}';
$json = json_decode($data,true);
/* Some database stuff ... */
echo "Retour ".print_r($json)." et ".$json['PUR_sku']." et ".$json['PUR_user'];
?>
When i launch the app and execute sendPurchase function, it seems to be ok until the execution of the HttpPost. In the logcat i get all the logs with correct params, except the last log "RESULT" that does not appear.
That's why i guess something is going wrong with the HttpPost execution, but actually i don't know if the problem comes from the application side or the php script side...
When i execute the php script alone in a web browser, replacing first $data line by the second one, everything is ok. But when it comes from the application it's not ok...
The Json Object sent (i hope) to the script seems ok too : {"PUR_user":3,"PUR_sku":"singleone"}
(the sendPurchase function is executed in Background).
Any idea about what i'm doing wrong ? Thanks !
/EDIT/
Here is the logcat for #RyuZz solution.
My code is about purchasing an item, consume it and send new value to my database on a web server. The purchase & consume are ok, but i can't send the values to the web server.
And again, when i execute the php script alone in a web browser, replacing first $data line by the second one, everything is ok.
Note that i have another similar code to register user to GCM, using HttpClient, and that code works fine.
06-25 14:07:12.968: D/IabHelper(21833): Successfully consumed sku: singleconf
06-25 14:07:12.968: D/IabHelper(21833): Ending async operation: consume
06-25 14:07:12.979: D/CONSUME(21833): Consumption finished. Purchase: PurchaseInfo(type:inapp):{"orderId":"12999763169054705758.1353445524837889","packageName":"com.*.*","productId":"singleconf","purchaseTime":1435234296875,"purchaseState":0,"purchaseToken":"bohbcbiigcbidfficbikebnk.AO-J1OzuQ_SsNTG1h9MtUvbaPc3PeN9nBHG-qBOE82ao1rTDFNrgA7tYQcMdECxCVFrrZEn_QifQ28OcIupyesZI-5cjDILFODYpBEaeqMfE0wCAeMFkJLfNUK_TsKPMj7F2sBDdgOYx"}, result: IabResult: Successful consume of sku singleconf (response: 0:OK)
06-25 14:07:12.979: D/CONSUME(21833): You bought & consumed a single conf
06-25 14:07:12.979: D/CONSUME(21833): End consumption flow.
06-25 14:07:12.979: E/Purchase Background(21833): Inside doInBackground
06-25 14:07:12.979: E/sendPurchase(21833): Failed to send HTTP POST request due to: java.lang.NullPointerException

You can try the following instead of HttpClient which is anyway deprecated:
try{
int pur_user = prefs.getInt("C_user", Integer.MIN_VALUE);
URL url = new URL("http://www.*.com/includes/purchase.php");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Accept", "application/json");
connection.setRequestMethod("POST");
JSONObject jsonObject = new JSONObject();
jsonObject.put("PUR_sku", SKU);
jsonObject.put("PUR_user", pur_user);
//convert JSONObject to JSON to String
json = jsonObject.toString();
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
writer.write(json);
writer.close();
responseCode = connection.getResponseCode();
if(responseCode == 200) {
InputStream content = connection.getInputStream();
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(content, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null)
{
sb.append(line).append("\n");
}
result = sb.toString();
//TODO get your stuff from result
content.close();
} catch (Exception ex) {
Log.e(TAG, "Failed to parse JSON due to: " + ex);
} finally {
connection.disconnect();
}
} else {
Log.e(TAG, "Server responded with status code: " + responseCode);
}
} catch(Exception ex) {
Log.e(TAG, "Failed to send HTTP POST request due to: " + ex);
}
if this isn't working, please post the logcat.
Don't forget to implement the required permissions in your manifest:
<uses-permission
android:name="android.permission.INTERNET" />

Encoding Issue with HttpUrlConnection in Android

I want to send an XML message to a server from my Android Mobile app via HTTP post.
I tried it with HttpUrlConnection, following these steps:
URL url = new URL(vURL);
HttpUrlConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
// Adding headers (code removed)
conn.setRequestProperty("Content-Type", "text/xml; charset=utf-16");
OutputStream out = new BufferedOutputStream(conn.getOutputStream());
// Adding XML message to the connection output stream
// I have removed exception handling to improve readability for posting it here
out.write(pReq.getBytes()); // here pReq is the XML message in String
out.close();
conn.connect();
Once I get the response, the stream reading part is in done this manner:
BufferedReader in = null;
StringBuffer sb;
String result = null;
try {
InputStreamReader isr = new InputStreamReader(is);
// Just in case, I've also tried:
// new InputStreamReader(is, "UTF-16");
// new InputStreamReader(is, "UTF-16LE");
// new InputStreamReader(is, "UTF-16BE");
// new InputStreamReader(is, "UTF-8");
in = new BufferedReader(isr);
sb = new StringBuffer("");
String line = "";
while ((line = in.readLine()) != null)
sb.append(line);
in.close();
result = sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
Now the result string I get is in some unreadable format/encoding.
When I try the same thing with HttpClient it works correctly. Here is the streaming reading part once I get an HttpResponse after the HttpClient.execute call:
BufferedReader in = null;
InputStream is;
StringBuffer sb;
String decompbuff = null;
try {
is = pResponse.getEntity().getContent();
InputStreamReader isr = new InputStreamReader(is);
in = new BufferedReader(isr);
// Prepare the String buffer
sb = new StringBuffer("");
String line = "";
while ((line = in.readLine()) != null)
sb.append(line);
in.close();
// gZip decompression of response. Note: message was compressed before
// posting it via HttpClient (Posting code is not mentioned here)
decompbuff = Decompress(sb.toString());
} catch (Exception e) {
e.printStackTrace();
}
return decompbuff;
Some help is appreciated in understanding the problem.

One (severe) problem could be that you're ignoring the encoding of input and output.
Input
conn.setRequestProperty("Content-Type", "text/xml; charset=utf-16");
OutputStream out = new BufferedOutputStream(conn.getOutputStream());
// Adding XML message to the connection output stream
// I have removed exception handling to improve readability for posting it here
out.write(pReq.getBytes()); // <-- you use standard platform encoding
out.close();
better:
out.write(pReq.getBytes("UTF-16"));
Output
You probably ignored compression, which would better look like this (taken from DavidWebb):
static InputStream wrapStream(String contentEncoding, InputStream inputStream)
throws IOException {
if (contentEncoding == null || "identity".equalsIgnoreCase(contentEncoding)) {
return inputStream;
}
if ("gzip".equalsIgnoreCase(contentEncoding)) {
return new GZIPInputStream(inputStream);
}
if ("deflate".equalsIgnoreCase(contentEncoding)) {
return new InflaterInputStream(inputStream, new Inflater(false), 512);
}
throw new RuntimeException("unsupported content-encoding: " + contentEncoding);
}
// ...
InputStream is = wrapStream(conn.getContentEncoding(), is);
InputStreamReader isr = new InputStreamReader(is, "UTF-16");
in = new BufferedReader(isr);
sb = new StringBuffer("");
String line = "";
while ((line = in.readLine()) != null)
sb.append(line); // <-- you're swallowing linefeeds!
in.close();
result = sb.toString();
It would be better to let the XML-Parser consume your InputStream directly. Don't create a JAVA string, but let the parser scan the bytes. It will automatically detect the encoding of the XML.
Generally there might be still an issue, because we don't know what type of UTF-16 you use. Can be BigEndian or LittleEndian. That's why I asked, if you really need UTF-16. If you don't have to treat with some asian languages, UTF-8 should be more efficient and easier to use.
So the "solution" I gave you is not guaranteed to work - you have to fiddle with UTF-16 BE/LE a bit and I wish you good luck and patience.
Another remark: in your example above you first construct the String and then Decompress it. That is the wrong order. The stream comes compressed (gzip, deflate) and must be decompressed first. Then you get the String.

how I get the html source with utf-8 format?

I write this code to get html source from a site.
HttpURLConnection connection;
OutputStreamWriter request = null;
URL url = null;
String response = null;
String parameters = "aranan="+et.getText();
try
{
url = new URL("http://www.fragmanfan.com/arama.asp");
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
request = new OutputStreamWriter(connection.getOutputStream());
request.write(parameters);
request.flush();
String line = "";
InputStreamReader isr = new InputStreamReader(connection.getInputStream());
BufferedReader reader = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
// Response from server after login process will be stored in response variable.
response = sb.toString();
// You can perform UI operations here
browser.loadDataWithBaseURL(null, response,"text/html", "UTF-8", null);
isr.close();
reader.close();
}
catch(IOException e)
{
// Error
}
}
});
But there is a one problem.It is : response (the variable that have html source) is not utf-8 format.
How I can fix this?
Thanks.

.
.
.
InputStreamReader isr = new InputStreamReader(connection.getInputStream(),"ISO-8859-9");
.
.
.

Since your response seems to be your HTML webpage in a single String, you should make sure that the head tag of your page cointains the label that defines the codification.. if not you can append it yourself to your StringBuilder.
Here is how you can do it:
final StringBuilder sb =
new StringBuilder("<html><head>"+ "<meta http-equiv=\"content-type\"content=\"text/html;charset=utf-8\" />"+ "</head><body>");
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
response = sb.toString();
sb.append(response);
sb.append("</body></html>");
and then you can properly load your HTML to your webview / browser. (this worked for me so I know for sure that it actually works =] )
p.d. make sure to accept the answer that properly answer your question so people keep answering your future questions.
https://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work