How to send a simple http command without opening the browser??
public void addListenerOnButton() {
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent browserIntent =
new Intent(Intent.ACTION_VIEW, Uri.parse("http://192.168.1.95:8080/json.htm?type=command¶m=switchlight&idx=2&switchcmd=Off&level=0"));
startActivity(browserIntent);
}
});
I think, I know what you want to do. A simple example here, could be helpful.
HTTPClient is what you are looking for. Make sure to use it in a background thread, e.g. in an AsyncTask.
A tutorial like this will get you started: http://hmkcode.com/android-internet-connection-using-http-get-httpclient/
The same question Make an HTTP request with android
Simply, here is the code ( http://www.androidhive.info/2011/10/android-making-http-requests/ )
// Creating HTTP client
HttpClient httpClient = new DefaultHttpClient();
// Creating HTTP Post
HttpPost httpPost = new HttpPost(
"http://www.example.com/login");
// Building post parameters
// key and value pair
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
nameValuePair.add(new BasicNameValuePair("email", "user#gmail.com"));
nameValuePair.add(new BasicNameValuePair("message",
"Hi, trying Android HTTP post!"));
// Url Encoding the POST parameters
try {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
} catch (UnsupportedEncodingException e) {
// writing error to Log
e.printStackTrace();
}
// Making HTTP Request
try {
HttpResponse response = httpClient.execute(httpPost);
// writing response to log
Log.d("Http Response:", response.toString());
} catch (ClientProtocolException e) {
// writing exception to log
e.printStackTrace();
} catch (IOException e) {
// writing exception to log
e.printStackTrace();
}
Related
I would like to send an http request to custom api.
I have the request details, and it is working using postman(http client).
Im trying to translate that request to android, using AsyncTask.
I couldnt managed to understand few things:
first, how to send the Bearer token that I have(oauth 2.0).
the second, how to send a jason body.
all the details about the request are in the following link:
https://web.postman.co/collections/7428863-ca5b907d-2752-4d4e-b8a8-29d5cd0dc098?version=latest&workspace=03f5fe5b-0ecd-43f8-8759-3aa868f4cb7f
my "DoInBackground" :
protected Void doInBackground(Void... voids) {
response = null;
Log.v("DoInBackground","entered");
//sending Data
if (valid) {
Log.v("ifvaild","entered");
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("https://dmyzcsu4e68qfgi56y7l2qu5ky40da2o.ui.nabu.casa/api/services/script/turn_on");
//httpPost.addHeader("Accept-Language", "he");
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
nameValuePair.add(new BasicNameValuePair("Authorization", "Bearer My Bearer"));
nameValuePair.add(new BasicNameValuePair("Content-Type", "application/json"));
nameValuePair.add(new BasicNameValuePair("script.turn_on", "script.gt1"));
Log.v("nameValue","entered");
try {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair, HTTP.UTF_8));
} catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
try {
response = httpClient.execute(httpPost);
Log.v("HttpClient","entered");
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
this is not working, I get an authentication failure from the server
thanks for your help!
You need to add those pairs in the header. And add the body as entity.
// headers
httpPost.addHeader("Authorization", "Bearer My Bearer");
httpPost.addHeader("Content-Type", "application/json");
httpPost.addHeader("script.turn_on", "script.gt1");
// body
String bodyString = "{\"data\":1}"; // your json string
StringEntity bodyEntity = new StringEntity(bodyString);
httpPost.setEntity(bodyEntity);
Just a tip. Look into Retrofit2 library to do all of this.
i am new to android, i m trying to api call with php , i have done one example for it, that work on another computer fine but same app package gives error in eclipse on my laptop.
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("stringdata", "Hi"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
} `
hear is my error log, i got this much of errors.
//Try following way
//List<NameValuePair> nameValuePairs
HttpClient hc = new DefaultHttpClient();
HttpPost hp = new HttpPost(url);
UrlEncodedFormEntity obj=new UrlEncodedFormEntity(nameValuePairs);
obj.setChunked(true);
hp.setEntity(obj);
HttpResponse hr = hc.execute(hp);
HttpEntity he = hr.getEntity();
Logcat is clear: Could not find a method postData(View) in the activity class. I guess you've used xml layout for setting button action.
In this case, just change your
public void postData() {
}
to
public void postData(View view) {
}
Note: setting button listeners this way isn't efficient.
Also, you should perform network operations on another thread - using network on main thread will raise NetworkOnMainThreadException on Android 3.0+
I am attempting to help a student write an android app that will contact a specific webserver. From the looks of the website, you can issue a GET requestion with your web browser and you get back a cookie session and an "authenticity token" (see the source of the page as an invisible input)
We issue a GET request and then want to follow it up with the post, but we are receiving a status code of 404 on the post. On a side note, the first GET request returns a code of 200.
Does anyone have any ideas? Below is the code that gets executed...
public void run()
{
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet("https://co22.herokuapp.com/login/");
HttpPost httpPost = new HttpPost("https://co22.herokuapp.com/login/sessions");
HttpResponse response;
try
{
response = httpClient.execute(httpGet);
Log.d("matt",response.getStatusLine().toString());
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("session[network_id]", username));
nameValuePairs.add(new BasicNameValuePair("session[password]", password));
nameValuePairs.add(new BasicNameValuePair("authenticity_token","9yvxPOUpRFdsTeHAZtISEfBHpElDTHzvMjAbQnxOHDM="));
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
response = httpClient.execute(httpPost);
Log.d("matt",response.getStatusLine().toString());
}
catch (ClientProtocolException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
It appears that the above will work correctly, but we were just sending the second post request to the wrong website.
I'm trying to send data from an Android smartphone via a POST request to a REST web service.
There is no error on client side, but on the server side is no code executed if I have sent the data:
Client:
public void connect2server(View v) throws IOException {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://192.168.1.108:8182");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("stringdata", "data"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
Server side:
public class data_server extends ServerResource {
public static void main(String[] args) throws Exception {
// Create the HTTP server and listen on port 8182
new Server(Protocol.HTTP, 8182, data_server.class).start();
}
#Post
public String toString1() throws IOException {
System.out.println(getRequestEntity().getText());
return "ok";
}
}
How is this caused and how can I solve this?
There's no error because you are catching the errors and doing nothing with them.
Try adding the following into the catch blocks and you should see what's happening in your LogCat output. Remember to the import the Log class
Log.w("com.name.pkg", e);
where "com.name.pkg" is just a tag so help you filter on. usually the name of the program.
Alternatively, quite commonly in use is to send a toast with Toast.makeText(...).show(); with e.getMessage() but I don't like doing that, so I don't recommend it. You would be better to pass a string back to the calling function and allow that to do the toast.
can anyone give me an idea of using web service using HTTP protocol.
Here is an example for "Executing a HTTP POST Request with HttpClient":
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "123"));
nameValuePairs.add(new BasicNameValuePair("username", "Paresh"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
We can use web services in our application to send and receive data from a remote server. Consider the case of an login section from a application where you need to pass username and password to the server for checking the whether the user is a valid user or not. In this case the username and password are attached with a url and send it to the remote server for validation and in response you get a value stating whether the user is a valid user or not. Usually the response will be either in XML format or JSON format from there we need to parse that response to get the necessary values. Check out the following example code in this I have created a class named "parsing" and it using the http protocol to receive a data.
public class parsing extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try {
HttpClient client = new DefaultHttpClient();
String postURL = "http://services.digg.com/topics?appkey=http://example.com&type=json";
HttpPost post = new HttpPost(postURL);
HttpResponse responsePOST = client.execute(post);
HttpEntity resEntity = responsePOST.getEntity();
String response=EntityUtils.toString(resEntity);
response=response.trim();
Log.i("RESPONSE=",response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
See the response on the Logcat and do not for get to include <uses-permission android:name="android.permission.INTERNET" />
because we are fetching the data from the remote server which needs internet permission.