我正在尝试使用我的Sony Smartwatch 3从AWS获取数据。但是，我总是得到＆＃34;错误：null＆＃34;使用Volley处理数据时。它可以在我的Android智能手机上使用完全一些代码，但在智能手表上遇到错误。
这是我的活动代码
button2 = (Button) findViewById(R.id.button2);
button2.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
getTemperature();
//displaySpeechRecognizer();
}
});
和我的凌空代码
private void getTemperature() {
// Tag used to cancel the request
String tag_string_req = "req_login";
pDialog.setMessage("Getting data ...");
showDialog();
StringRequest strReq = new StringRequest(Request.Method.GET,
AppConfig.URL_TEMPERATURE, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "AWS-Response: " + response.toString());
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
JSONObject user = jObj.getJSONObject("user");
String temperature = user.getString("value");
String humidity = user.getString("value2");
String totals = "The temperature is "+temperature+" and humidity is "+humidity;
total.setText(totals);
} catch (JSONException e) {
// JSON error
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "AWS Error: " + error.getMessage());
hideDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}
这是预期的JSON响应
{"user":{"value":"23.0","value2":"41.0"}}
和当前错误
04-04 15:32:49.229 27078-27078/com.sp.weargetfromaws E/MainActivity: AWS Error: null
和php文件
<?php
// json response array
$response = array();
$config = parse_ini_file('./private/config.ini');
$link = mysqli_connect($config['servername'],$config['username'],$config['password'],$config['dbname']);
$tablename = $config['tablenamevalue'];
$sql = "SELECT * FROM ".$tablename." WHERE serialno = 'a' ORDER BY ID DESC LIMIT 1 ";
if($result = mysqli_query($link, $sql))
{
if(mysqli_num_rows($result) > 0)
{
while($row = $result->fetch_array(MYSQLI_BOTH))
{
$response["user"]["value"] = $row["value"];
$response["user"]["value2"] = $row["value2"];
}
echo json_encode($response);
}
}
?>
答案 0 :(得分：0)
如果您不需要使用GET方法将任何值推送到API代码，请尝试使用JsonArrayRequest
你的php文件：
public class MapLocationActivity extends AppCompatActivity
implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportActionBar().setTitle("Map Location Activity");
mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
}
@Override
public void onPause() {
super.onPause();
//stop location updates when Activity is no longer active
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
@Override
public void onMapReady(GoogleMap googleMap)
{
mGoogleMap=googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
//Location Permission already granted
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
} else {
//Request Location Permission
checkLocationPermission();
}
}
else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
@Override
public void onConnectionSuspended(int i) {}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {}
@Override
public void onLocationChanged(Location location)
{
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
//move map camera
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,11));
//optionally, stop location updates if only current location is needed
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
new AlertDialog.Builder(this)
.setTitle("Location Permission Needed")
.setMessage("This app needs the Location permission, please accept to use location functionality")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(MapLocationActivity.this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}
你的截击码：
$config = parse_ini_file('./private/config.ini');
$link = mysqli_connect($config['servername'],$config['username'],$config['password'],$config['dbname']);
$tablename = $config['tablenamevalue'];
$sql = "SELECT * FROM ".$tablename." WHERE serialno = 'a' ORDER BY ID DESC LIMIT 1 ";
$result = mysqli_query($link,$sql);
$res = array();
while($row = mysqli_fetch_array($result)){
array_push($res, array(
"value1"=>$row['value1'],
"value2"=>$row['value2'],
));
}
echo json_encode($res, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_ERROR_UTF8);