Android-Syncano SDK does not work… here is a solution to the problem.
Android-Syncano SDK does not work
I’m developing an android app that uses syncano to send data to a syncano server, but the data refuses to be sent. We’ve verified that the condition we sent works, but it doesn’t work. This is the activity used to send the data:
package com.crash.beacon;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import com.crash.beacon.Book;
import com.syncano.library.Syncano;
import com.syncano.library.api.Response;
public class MainActivity extends AppCompatActivity implements SensorEventListener, LocationListener {
boolean isEnabled = false;
Button btn;
private Syncano syncano;
String[] listItems = new String[]{"Home", "About", "Website"};
float lat = 0, lng = 0, alt = 0;
Sensor accel;
SensorManager manager;
float x = 0, y = 0, z = 0;
DrawerLayout dl;
private ActionBarDrawerToggle mDrawerToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button)findViewById(R.id.crash);
syncano = new Syncano("api_key", "late-surf-9471");
gui(isEnabled);
manager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
accel = manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
Get the location manager
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Define the criteria how to select the locatioin provider -> use
default
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
Initialize the location fields
if (location != null) {
onLocationChanged(location);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Handle action bar item clicks here. The action bar will
automatically handle clicks on the Home/Up button, so long
as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void onCrash(View view){
isEnabled = !isEnabled;
gui(isEnabled);
}
public void gui(boolean state){
if(state){
btn.setText("Enabled");
}
else{
btn.setText("Disabled");
}
}
@Override
protected void onResume(){
super.onResume();
manager.registerListener(this, accel, SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause(){
super.onPause();
manager.unregisterListener(this);
}
@Override
public void onSensorChanged(SensorEvent event) {
x = event.values[0];
y = event.values[1];
z = event.values[2];
Demo values
For actual deployment, use lat, alt, and lng variables
float hLat = 39, hLng = -75, hAlt = 25;
final Book book = new Book();
book.latitude = lat;
book.longitutde = lng;
book.altitude = alt;
book.force_x = x;
book.force_y = y;
book.force_y = z;
if(isEnabled){
if(Math.abs(x) > 20 && Math.abs(y) > 20 && Math.abs(z) > 20){
new Network(book, syncano).execute();
}
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
return super.onPrepareOptionsMenu(menu);
}
@Override
public void onLocationChanged(Location location) {
lat = (float)location.getLatitude();
lng = (float)location.getLongitude();
alt = (float)location.getAltitude();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
Network .java
package com.crash.beacon;
import android.os.AsyncTask;
import android.util.Log;
import com.syncano.library.Syncano;
import com.syncano.library.api.Response;
import java.util.List;
/**
* Created by Tienvo on 11/8/2015.
*/
public class Network extends AsyncTask<String, Void, String> {
Book b;
Syncano syn;
public Network(Book book, Syncano syncano){
this.b = book;
this.syn = syncano;
}
@Override
protected String doInBackground(String... params) {
Response<Book> responseCreateObject = syn.createObject(b).send();
Log.d("code", String.valueOf(Response.CODE_SUCCESS));
Response<List<Book>> responseGetBooks = syn.createObject(b).send();
return "Executed";
}
}
Book .java
package com.crash.beacon;
import com.syncano.library.annotation.SyncanoClass;
import com.syncano.library.annotation.SyncanoField;
import com.syncano.library.data.SyncanoObject;
/**
* Created by tom on 11/7/15.
*/
@SyncanoClass(name = "ltds")
public class Book extends SyncanoObject{
public static final String FIELD_LAT = "latitude";
public static final String FIELD_LNG = "longitude";
public static final String FIELD_ALT = "altitude";
public static final String FIELD_X = "force_x";
public static final String FIELD_Y = "force_y";
public static final String FIELD_Z = "force_z";
@SyncanoField(name = FIELD_LAT)
public float latitude;
@SyncanoField(name = FIELD_LNG)
public float longitutde;
@SyncanoField(name = FIELD_ALT)
public float altitude;
@SyncanoField(name = FIELD_X)
public float force_x;
@SyncanoField(name = FIELD_Y)
public float force_y;
@SyncanoField(name = FIELD_Z)
public float force_z;
}
Solution
This is what your sending method looks like.
When you create the object, the result code should be HTTP_CODE_CREATED 201 and the response type Response<Book> .
When you download the object, your response code should be HTTP_CODE_SUCCESS 200 and the response type Response<List<Book>>
@Override
protected String doInBackground(String... params) {
send object to server
Response<Book> responseCreateObject = syn.createObject(b).send();
if (responseCreateObject.getHttpResultCode() == Response.HTTP_CODE_CREATED) {
Log.d(TAG, "Success. Item created.");
} else {
Log.d(TAG, "Fail.");
}
get objects from server
Response<List<Book>> responseGetObjects = syn.getObjects(Book.class).send();
if (responseGetObjects.getHttpResultCode() == Response.HTTP_CODE_SUCCESS) {
List<Book> books = responseGetObjects.getData();
Log.d(TAG, "Success. Items downloaded: " + books.size());
} else {
Log.d(TAG, "Fail.");
}
return "Executed";
}
I simplified your code a bit to focus on the Syncano connection and it works! It creates an object on your Syncano instance.
package com.chimeraprime.syncano4libcheck;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import com.syncano.library.Syncano;
import com.syncano.library.annotation.SyncanoClass;
import com.syncano.library.annotation.SyncanoField;
import com.syncano.library.api.Response;
import com.syncano.library.data.SyncanoObject;
import java.util.List;
import java.util.Random;
public class OtherActivity extends AppCompatActivity {
private Button btn;
private Syncano syncano;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_other);
syncano = new Syncano("<api_key>", "<instance>");
btn = (Button) findViewById(R.id.crash);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Random rnd = new Random();
Book book = new Book();
book.latitude = rnd.nextFloat();
book.longitutde = rnd.nextFloat();
book.altitude = rnd.nextFloat();
book.force_x = rnd.nextFloat();
book.force_y = rnd.nextFloat();
book.force_y = rnd.nextFloat();
new Network(book, syncano).execute();
}
});
}
public static class Network extends AsyncTask<String, Void, String> {
Book b;
Syncano syn;
String TAG = Network.class.getSimpleName();
public Network(Book book, Syncano syncano) {
this.b = book;
this.syn = syncano;
}
@Override
protected String doInBackground(String... params) {
send object to server
Response<Book> responseCreateObject = syn.createObject(b).send();
if (responseCreateObject.getHttpResultCode() == Response.HTTP_CODE_CREATED) {
Log.d(TAG, "Success. Item created.");
} else {
Log.d(TAG, "Fail.");
}
get objects from server
Response<List<Book>> responseGetObjects = syn.getObjects(Book.class).send();
if (responseGetObjects.getHttpResultCode() == Response.HTTP_CODE_SUCCESS) {
List<Book> books = responseGetObjects.getData();
Log.d(TAG, "Success. Items downloaded: " + books.size());
} else {
Log.d(TAG, "Fail.");
}
return "Executed";
}
}
@SyncanoClass(name = "ltds")
public class Book extends SyncanoObject {
public static final String FIELD_LAT = "latitude";
public static final String FIELD_LNG = "longitude";
public static final String FIELD_ALT = "altitude";
public static final String FIELD_X = "force_x";
public static final String FIELD_Y = "force_y";
public static final String FIELD_Z = "force_z";
@SyncanoField(name = FIELD_LAT)
public float latitude;
@SyncanoField(name = FIELD_LNG)
public float longitutde;
@SyncanoField(name = FIELD_ALT)
public float altitude;
@SyncanoField(name = FIELD_X)
public float force_x;
@SyncanoField(name = FIELD_Y)
public float force_y;
@SyncanoField(name = FIELD_Z)
public float force_z;
}
}