Error with Async_Http_Response_Handler - mysql

Question

I am a beginner in Android development. I am developing an application which receives MySql data and then saves it in SQLite.
I am using Json for sync status so that i can show the the number unsync data as number of pending data to be synced.
The AsyncHttpResponseHandler is showing error in code as " Class 'Anonymous class derived from AsyncHttpResponseHandler method' onFailure(int, Header[], byte[],Throwable)' in 'AsyncHttpResponseHandler' ".
Now i am stuck with a problem in the code which i can't solve.
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
public class MainActivity extends AppCompatActivity {
// DB Class to perform DB related operations
DBController controller = new DBController(this);
// Progress Dialog Object
ProgressDialog prgDialog;
HashMap<String, String> queryValues;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get User records from SQLite DB
ArrayList<HashMap<String, String>> userList = controller.getAllUsers();
// If users exists in SQLite DB
if (userList.size() != 0) {
// Set the User Array list in ListView
ListAdapter adapter = new SimpleAdapter(MainActivity.this, userList, R.layout.view_logtable_entry, new String[] {
"id", "time","logtitle","log" }, new int[] { R.id.id, R.id.time, R.id.logtitle, R.id.log });
ListView myList = (ListView) findViewById(android.R.id.list);
myList.setAdapter(adapter);
}
// Initialize Progress Dialog properties
prgDialog = new ProgressDialog(this);
prgDialog.setMessage("Transferring Data. Please wait...");
prgDialog.setCancelable(false);
// BroadCase Receiver Intent Object
Intent alarmIntent = new Intent(getApplicationContext(), SampleBC.class);
// Pending Intent Object
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
// Alarm Manager Object
AlarmManager alarmManager = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
// Alarm Manager calls BroadCast for every Ten seconds (10 * 1000), BroadCase further calls service to check if new records are inserted in
// Remote MySQL DB
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis() + 5000, 10 * 1000, pendingIntent);
}
// When Options Menu is selected
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here.
int id = item.getItemId();
// When Sync action button is clicked
if (id == R.id.refresh) {
// Transfer data from remote MySQL DB to SQLite on Android and perform Sync
syncSQLiteMySQLDB();
return true;
}
return super.onOptionsItemSelected(item);
}
// Method to Sync MySQL to SQLite DB
public void syncSQLiteMySQLDB() {
// Create AsycHttpClient object
AsyncHttpClient client = new AsyncHttpClient();
// Http Request Params Object
RequestParams params = new RequestParams();
// Show ProgressBar
prgDialog.show();
// Make Http call to getusers.php
client.post("http://example.com:3333/syncfolder/getusers.php", params, new AsyncHttpResponseHandler() {
#Override
public void onSuccess(String response) {
// Hide ProgressBar
prgDialog.hide();
// Update SQLite DB with response sent by getusers.php
updateSQLite(response);
}
// When error occured
#Override
public void onFailure(int statusCode, Throwable error, String content) {
// TODO Auto-generated method stub
// Hide ProgressBar
prgDialog.hide();
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();
}
}
});
}
public void updateSQLite(String response){
ArrayList<HashMap<String, String>> usersynclist;
usersynclist = new ArrayList<HashMap<String, String>>();
// Create GSON object
Gson gson = new GsonBuilder().create();
try {
// Extract JSON array from the response
JSONArray arr = new JSONArray(response);
System.out.println(arr.length());
// If no of array elements is not zero
if(arr.length() != 0){
// Loop through each array element, get JSON object which has userid and username
for (int i = 0; i < arr.length(); i++) {
// Get JSON object
JSONObject obj = (JSONObject) arr.get(i);
System.out.println(obj.get("id"));
System.out.println(obj.get("time"));
System.out.println(obj.get("logtitle"));
System.out.println(obj.get("log"));
// DB QueryValues Object to insert into SQLite
queryValues = new HashMap<String, String>();
// Add userID extracted from Object
queryValues.put("id", obj.get("id").toString());
// Add userName extracted from Object
queryValues.put("time", obj.get("time").toString());
queryValues.put("logtitle", obj.get("logtitle").toString());
queryValues.put("log", obj.get("log").toString());
// Insert User into SQLite DB
controller.insertUser(queryValues);
HashMap<String, String> map = new HashMap<String, String>();
// Add status for each User in Hashmap
map.put("id", obj.get("id").toString());
map.put("status", "1");
usersynclist.add(map);
}
// Inform Remote MySQL DB about the completion of Sync activity by passing Sync status of Users
updateMySQLSyncSts(gson.toJson(usersynclist));
// Reload the Main Activity
reloadActivity();
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
// Method to inform remote MySQL DB about completion of Sync activity
public void updateMySQLSyncSts(String json) {
System.out.println(json);
AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
params.put("syncstatus", json);
// Make Http call to updatesyncsts.php with JSON parameter which has Sync statuses of Users
client.post("http://example.com:3333/syncfolder/updatesyncsts.php", params, new AsyncHttpResponseHandler() {
#Override
public void onSuccess(String response) {
Toast.makeText(getApplicationContext(), "MySQL DB has been informed about Sync activity", Toast.LENGTH_LONG).show();
}
#Override
public void onFailure(int statusCode, Throwable error, String content) {
Toast.makeText(getApplicationContext(), "Error Occured", Toast.LENGTH_LONG).show();
}
});
}
// Reload MainActivity
public void reloadActivity() {
Intent objIntent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(objIntent);
}
}

Answer 1

you should change your method signature of
onSuccess(String response)
to
onSuccess(int responseCode, Header[] responseHeaders, String responseBody)