我正面临在Android应用程序中连续与服务器交互的错误
我已经制作了一个运行良好的应用程序，它不断向服务器发送用户lat，以及与服务器的其他一些交互（如配置文件图像，名称，朋友列表以及从服务器显示的所有内容）。但问题是，当应用程序处于后台/用户使用其他应用程序进行phonecall / user时，我的应用程序将断开其连接并且用户退出从服务器检索的服务（所有服务都取决于用户在登录期间获得的用户ID）。我试图解决这个问题，就像我的应用程序将永远是好的，并与其服务器活动进行交互，没有任何错误或中断，例如Facebook应用程序。如何使我的网络连接和管理行为像facebook或whatsApp应用程序。 检查图像。第一个是应用程序交互良好（配置文件名称和图片），第二个是错误（没有配置文件名称和图片），例如。
我的asyncTaskClass：
public class GetPostAsyncTaskWithInterface extends AsyncTask<String, Void, String> {
public AsyncResult asyncResult;
// HttpURLConnection httpURLConnection;
ProgressDialog progressDialog;
private final String baseUrl = UserInfo.getSiteUrl();
public Context context=null;
GetPostAsyncTaskWithInterface(Context context,AsyncResult asyncResult) {
this.context=context;
this.asyncResult= asyncResult;
}
@Override
protected void onPreExecute() {
//Toast.makeText(context,"Loading..",Toast.LENGTH_SHORT).show();
progressDialog=new ProgressDialog(context);
progressDialog.show();
}
@Override
protected String doInBackground(String... args) {
try {
// setting the URL
URL url = new URL(baseUrl+args[1]);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
// setting the method type
httpURLConnection.setRequestMethod(args[0]);
// httpURLConnection.setChunkedStreamingMode(0);
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
Log.v("Url", args[2]);
// setting the identification key name with query params
bufferedWriter.write(args[2]);
bufferedWriter.flush();
bufferedWriter.close();
Log.v("GetPostA", url.toString());
httpURLConnection.setReadTimeout(10*1000);
httpURLConnection.setConnectTimeout(15000 );
httpURLConnection.connect();
int getPostStatus = httpURLConnection.getResponseCode();
Log.v("GetPostSts", String.valueOf(getPostStatus));
String line = "";
String res = "";
// if(getPostStatus == 200){
// prepare the output buffer
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
while ((line = bufferedReader.readLine()) != null) {
res += line;
}
inputStream.close();
// }
httpURLConnection.disconnect();
// Log.v("ResD", res.toString());
return res.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
Log.v("GetPostCatchMal",e.toString());
} catch (IOException e) {
e.printStackTrace();
Log.v("GetPostCatchIOE", e.toString());
}
return null;
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if(progressDialog.isShowing()){
try{
progressDialog.dismiss();
}catch (Exception e){
}
}
if(result!=null) {
asyncResult.asyncResult(result);
}
}
}
我的活动类就像：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation_drawer);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
context = NavigationDrawerActivity.this;
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
View hView = navigationView.getHeaderView(0);
ownProfilePic = (ImageView) hView.findViewById(R.id.ownImageShowDrawerHeaderIvId_navigationDrawer);
ownNameShow = (TextView) hView.findViewById(R.id.showUserNameTvId_navigationDrawer);
/****************************** own profile name and image show ************************** */
ownNameShow.setText(UserInfo.getOwnProfileName());
// new ImageDownloaderTask(ownProfilePic).execute(UserInfo.ownProfilePicUrl);
Picasso.with(context).load(UserInfo.getOwnProfilePicUrl()).resize(100,100).placeholder(R.drawable.profile_show).error(R.drawable.profile_show).transform(new CircleTransform()).into(ownProfilePic);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
this.lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria=new Criteria();
provider =lm.getBestProvider(criteria,false);
location = this.lm.getLastKnownLocation(provider);
this.locationListener = new NavigationDrawerActivity();
this.lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 5, locationListener);
if (location != null) {
setUpMapIfNeeded(location);
updateUserLatLong(location);
}
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).addApi(LocationServices.API).build();
//route
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
// option menu.......................option menu,.,
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.navigation_drawer_option_menu, menu);
return true;
}
@Override
protected void onResume() {
super.onResume();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
Location location = this.lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
setUpMapIfNeeded(location);
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setMyLocationEnabled(true);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
return;
}
Location location = this.lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
Log.v("DangerNotification","locN M"+location);
if (location != null) {
setUpMapIfNeeded(location);
UserInfo.setLat(location.getLatitude());
UserInfo.setLng(location.getLongitude());
UserInfo.setLocation(location);
}
//setUpMapIfNeeded(location);
mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
Intent intent = new Intent(context, Live_MapActivity.class);
intent.putExtra("Driver", "anyFriend");
UserInfo.setFriendsId(friendIds.optString(marker.getId()));
startActivity(intent);
Toast.makeText(context, "You tracking " + marker.getTitle(), Toast.LENGTH_LONG).show();
}
});
}
@Override
public void onLocationChanged(Location location) {
Log.v("DangerNotification", "locN " + location);
if (location != null && SharedPreference.getDefaults("ownUserId", context) != "0") {
updateUserLatLong(location);
//setUpMapIfNeeded(location);
float speed = location.getSpeed();
UserInfo.setSpeed(speed);
UserInfo.setLat(location.getLatitude());
UserInfo.setLng(location.getLongitude());
UserInfo.setLocation(location);
}
userPosition = new LatLng(location.getLatitude(),
location.getLongitude());
if (mMap != null) {
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(userPosition,
12));
mMap.setMapType(UserInfo.getMapType());
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
boolean gps_enabled = false;
LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {
}
if (gps_enabled) {
Toast.makeText(context, "Gps enabled", Toast.LENGTH_LONG).show();
}
}
@Override
public void onProviderDisabled(String provider) {
/* ********************************************* Gps checking ********************************************************** */
boolean gps_enabled = false;
LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {
}
if (!gps_enabled) {
Toast.makeText(context, "Gps Disable", Toast.LENGTH_LONG).show();
}
/* ************************************************************************************************************ */
}
private void setUpMapIfNeeded(Location location) {
//updateUserLatLong(location);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
// Criteria criteria = new Criteria();
// criteria.setAccuracy(Criteria.ACCURACY_COARSE);
LatLng userPosition = new LatLng(location.getLatitude(),
location.getLongitude());
if (mMap != null) {
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(userPosition,
UserInfo.getZoomLevel()));
mMap.setMapType(UserInfo.getMapType());
userFriendsPos();
}
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
mMap.setMyLocationEnabled(true);
}
}
@Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Maps Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("android-app://com.tracker.systechdigital.realtimetrackingandmonitoring/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
@Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Maps Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("android-app://com.tracker.systechdigital.realtimetrackingandmonitoring/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
@Override
public void onConnected(Bundle bundle) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
location = LocationServices.FusedLocationApi.getLastLocation(
client);
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void asyncResult(String result) {
}
@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onPostResume() {
super.onPostResume();
}
@Override
protected void onRestart() {
super.onRestart();
ownNameShow.setText(UserInfo.getOwnProfileName());
// new ImageDownloaderTask(ownProfilePic).execute(UserInfo.ownProfilePicUrl);
Picasso.with(context).load(UserInfo.getOwnProfilePicUrl()).resize(100,100).placeholder(R.drawable.profile_show).error(R.drawable.profile_show).transform(new CircleTransform()).into(ownProfilePic);
if (location != null) {
setUpMapIfNeeded(location);
updateUserLatLong(location);
}
}
}
请帮忙。
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