More details about Android Asynchronous Http Client
Here is simple
HttpsURLConnection in ASyncTask class for Https GET web-API calling along with packet-header and JSONObject in body.Get JSON value show in RecyclerView.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_courses);
recyclerCourse = (RecyclerView) findViewById(R.id.recyclerCourse);
recyclerCourse.setHasFixedSize(true);
recyclerCourse.setLayoutManager(new LinearLayoutManager(this));
listCourses = new ArrayList<>();
AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Please Wait....");
progressDialog.show();
client.get(Config.URL_COURSEDIPLAY, params, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
try {
JSONArray arr = new JSONArray(new String(responseBody));
for(int i=0; i<arr.length();i++){
JSONObject obj = (JSONObject)arr.get(i);
ListCourse listCourse = new ListCourse(
obj.get("course").toString(),
obj.get("slid").toString()
);
listCourses.add(listCourse);
} //for int=0
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), "Loading Complete", Toast.LENGTH_LONG).show();
} catch (JSONException e){
progressDialog.dismiss();
// TODO Auto-generated catch block
Toast.makeText(getApplicationContext(), "Error Occured [Server's JSON response might be invalid]!", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
progressDialog.dismiss();
// TODO Auto-generated method stub
if(statusCode == 404){
Toast.makeText(getApplicationContext(), "Requested resource not found", Toast.LENGTH_LONG).show();
}else if(statusCode == 500){
Toast.makeText(getApplicationContext(), "Something went wrong at server end", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getApplicationContext(), "Unexpected Error occcured! [Most common Error: Device might not be connected to Internet]", Toast.LENGTH_LONG).show();
}
}
});
adapter = new CourseAdapter(listCourses,this);
recyclerCourse.setAdapter(adapter);
}
URL defined in Config class
private static final String ROOT_URL = "http://10.42.0.1/dsms/android/"; public static final String URL_COURSEDIPLAY = ROOT_URL + "displaycourse.php";
In Android Studio, use the Gradle entry as:
compile 'com.loopj.android:android-async-http:1.4.9'compile 'com.google.code.gson:gson:2.2.+'
