I am downloading objects(Videos) from aws s3 bucket. Once i call :
TransferManager transferManager = new TransferManager(s3client);
GetObjectRequest getRequest = new GetObjectRequest(bucket, entity.getName());
String s="";
download = transferManager.download(bucket, entity.getName(), f);
all the objects are downloading at background by default even if i exit my application or put my app on background.
BUT if u force close (means i long press my home button and close my application from running list)my application all the objects stops downloading
What are the ways to make downloading running at back even if application stops...
I tried with service as well:
public class MyDownloadingService extends Service {
public static Download download;
File f;
public static ArrayList<DownloadEntity> downloadList;
public class LocalBinder extends Binder {
public MyDownloadingService getService() {
return MyDownloadingService.this;
}
}
private final LocalBinder mBinder = new LocalBinder();
#Override
public void onCreate() {
super.onCreate();
// downloadList=new ArrayList<DownloadEntity>();
//Toast.makeText(this, "Service Created", 300);
}
#Override
public void onDestroy() {
super.onDestroy();
//Toast.makeText(this,"Service Destroy",300);
}
#Override
public void onLowMemory() {
super.onLowMemory();
//Toast.makeText(this, "Service LowMemory", 300);
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Toast.makeText(this,"task perform in service",300);
if (intent!=null) {
String bucket = "", object = "", file = "";
if (intent.getExtras() != null) {
if (intent.getExtras().getString("bucket") != null) {
bucket = intent.getExtras().getString("bucket");
}
if (intent.getExtras().getString("object") != null) {
object = intent.getExtras().getString("object");
}
if (intent.getExtras().getString("file") != null) {
file = intent.getExtras().getString("file");
}
new downloader(bucket, object, file).execute();
}
}
return android.app.Service.START_STICKY;
}
#Override
public IBinder onBind(Intent intent) {
return mBinder;
}
public static void getList(){
if (downloadList!=null) {
SoapCostants.downloadList = downloadList;
}
}
public class downloader extends AsyncTask<String, String, String> {
String bucket,object;
String file;
public downloader(String bucket,String object,String file) {
this.object=object;
this.file=file;
this.bucket=bucket;
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
#Override
protected String doInBackground(String... params) {
File f=new File(file);
// Toast.makeText(this,"Service start",300);
TransferManager transferManager = new TransferManager(S3Getter.s3client);
try {
GetObjectRequest getRequest = new GetObjectRequest(bucket, object);
String s="";
download = transferManager.download(bucket, object, f);
DownloadEntity entity2=new DownloadEntity();
entity2.setKey(object);
entity2.setValue(download);
if (downloadList==null){
downloadList=new ArrayList<DownloadEntity>();
}
SoapCostants.downloadList.add(entity2);
downloadList.add(entity2);
for (int i = 0; i < SoapCostants.downloadedList.size(); i++) {
//SoapCostants.downloadedList
if (object.equalsIgnoreCase(SoapCostants.downloadedList.get(i).getName())) {
SoapCostants.downloadedList.get(i).setIsDownloading("yes");
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
}
}
i used start_sticky for services. But if my application was in background for long time it gets closed. or when i force close my application it gets closed.
i checked it by calling getList() of service class above. But it returns null.
The TransferManager is hosted in your application. Once the application is killed, everything it owns will be killed too, TransferManager included. When TransferManager is killed, it invokes shutdown() in finalized() to terminate all transfers running in its thread pool. If you really want it to continue to run, then you'd better try Service which can survive upon application termination. See http://developer.android.com/guide/components/services.html for more details.
Related
I am very beginner in Android, I am creating android application, communication with Siemens PLC its working fine but if i click button only the data shown in android , I want to run this code in service I don't know how to add code(below) in service
protected String doInBackground(String... strings) {
try{
client.SetConnectionType(S7.S7_BASIC);
int res = client.ConnectTo("10.0.2.2",0,1);
if(res == 0)
{
byte[] data = new byte[4];
res = client.ReadArea(S7.S7AreaDB,1,0,2,data);
ret = "Values "+S7.GetWordAt(data,0);
}
else {
ret = "Err:"+S7Client.ErrorText(res);
}
client.Disconnect();
}
catch (Exception e)
{
ret= "Exe"+e.toString();
Thread.interrupted();
}
return "Executed";
}
Above code is working fine but this code added to service I create one service
public class MyService extends Service {
S7Client client = new S7Client();
String ret = "";
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
PlcReader task=new PlcReader();
task.execute("");
return START_NOT_STICKY;
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
public class PlcReader extends android.os.AsyncTask<String,Void,String>{
#Override
protected String doInBackground(String... strings) {
try{
client.SetConnectionType(S7.S7_BASIC);
int res = client.ConnectTo("10.0.2.2",0,1);
if(res == 0)
{
byte[] data = new byte[4];
client.ReadArea(S7.S7AreaDB,1,0,4,data);
ret = "Values "+S7.GetWordAt(data,0);
}
else {
ret = "Err:"+S7Client.ErrorText(res);
}
client.Disconnect();
}
catch (Exception e)
{
ret= "Exe"+e.toString();
Thread.interrupted();
}
return "Executed";
}
#Override
protected void onPostExecute(String s) {
Toast.makeText(getApplicationContext(),ret,Toast.LENGTH_LONG).show();
}
}
I added code with service but shows connection problem
See this example:-
public class ExtractService extends Service {
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
AsyncTask task=new AsyncTask();
task.execute();
return START_NOT_STICKY;
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
public class AsyncTask extends android.os.AsyncTask<Void,Void,Void>{
#Override
protected Void doInBackground(Void... voids) {
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
}
}
}
You can call your AsyncTask from the method onStartCommand in the Service:
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Let it continue running until it is stopped.
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
new MyAsyncTask().execute("stringParameter")
return START_STICKY;
}
A couple of tips:
I see that you return a String value from your AsyncTask, just avoid using
String result = new MyAsyncTask().execute("stringParameter").get()
As it will block your main thread (unless you start your async task in a different thread).
A more appropriate solution is to handle the result in the onPostExecute method in your AsyncTask (just override it)
Another thing to think about is that AsyncTask is deprecated in Android R, some good alternatives are the java.util.concurrent package and RxJava library
I am currently working on a video conferencing app, what I want to achieve is that when someone calls me and upon receiving their call I closed the app by swiping it from recent apps, and then I want to notify the caller by rejecting the call when the app is closed from recent apps
public class RecentAppService extends Service {
private static final String TAG = "RecentAppStatus";
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
Log.i(TAG, "onCreate()");
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i(TAG, "onStartCommand()");
return START_STICKY;
}
#Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
Log.i(TAG, "onTaskRemoved()....!!!!!!!!!!");
Boolean callactive= AppsharedPreference.getAppPrefrerence(this)
.readBooleanData("callingactive");
Log.i(TAG, "onTaskRemoved()....!!!!!!!!!! Callactive ::::"+callactive);
if(callactive){
NotificationManager nManager = ((NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE));
nManager.cancelAll();
rejectCall();
}
Intent restartService = new Intent(getApplicationContext(), this.getClass());
restartService.setPackage(getPackageName());
PendingIntent restartServicePI = PendingIntent.getService(
getApplicationContext(), 1, restartService,
PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmService = (AlarmManager)getApplicationContext().getSystemService(Context.ALARM_SERVICE);
alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() +1000, restartServicePI);
}
#Override
public void onDestroy() {
super.onDestroy();
Log.i(TAG, "onDestroy()");
}
#Override
public void onLowMemory() {
super.onLowMemory();
Log.i(TAG, "onLowMemory()");
}
public void rejectCall(){
AsyncTaskRunner runner = new AsyncTaskRunner(this);
runner.execute();
}
}
I have added the above Sticky service to perform the tasks when someone closes my app from recent apps,i have also added the below code that contains Asynctask to the Service to perform the reject call function
class AsyncTaskRunner extends AsyncTask<String, String, String> {
private String resp;
private Context mcontext;
public AsyncTaskRunner(Context mContext) {
this.mcontext=mContext;
}
#Override
protected String doInBackground(String... params) {
publishProgress("Sleeping..."); // Calls onProgressUpdate()
try {
String mUserHash= AppsharedPreference.getAppPrefrerence(mcontext)
.readStringData("mUserHash");
String rejectApi= AppsharedPreference.getAppPrefrerence(mcontext)
.readStringData("rejectApi");
String apiToken= AppsharedPreference.getAppPrefrerence(mcontext)
.readStringData("apiToken");
String room= AppsharedPreference.getAppPrefrerence(mcontext)
.readStringData("room");
String callId= AppsharedPreference.getAppPrefrerence(mcontext)
.readStringData("callId");
ApiCallData apiCallData = new ApiCallData(rejectApi, apiToken, room, callId,mUserHash);
WebService.getWebservice().rejectCall(mcontext, apiCallData, new FutureCallback<String>() {
#Override
public void onCompleted(Exception e, String result) {
Log.i(TAG, "onTaskRemoved()....!!!!!!!!!! Result"+result);
}
});
} catch (Exception e) {
e.printStackTrace();
resp = e.getMessage();
}
return resp;
}
#Override
protected void onPostExecute(String result) {
Log.i(TAG, "onTaskRemoved()....!!!!!!!!!! Result"+result);
}
#Override
protected void onPreExecute() {
}
#Override
protected void onProgressUpdate(String... text) {
}
}
Everything works fine and the call gets disconnected correctly at the callerside when the application is not in foreground but when the app is open,then task is not achieved in Asynctask i.e, Asynctask stops when app is closed.. I am newbie to Android ,Thank you
You can use FirebaseJobDispatcher to perform some action even if app is closed.
to use FirebaseJobDispatcher first you need to create a Job , which will be something like this :-
FirebaseJobDispatcher dispatcher = new FirebaseJobDispatcher(new GooglePlayDriver(context));
Job myJob = dispatcher.newJobBuilder()
.setService(SyncJobScheduler.class)
.setTrigger(Trigger.executionWindow(0, 0))
.setTag("Set_your_unique_tag_here")
.setReplaceCurrent(false)
.build();
dispatcher.mustSchedule(myJob);
Put this above code where you want to start any task / perform any specific task
and then you can create your Scheduler class like this :-
public class SyncJobScheduler extends JobService {
#Override
public boolean onStartJob(final JobParameters job) {
new Thread(new Runnable() {
#Override
public void run() {
try {
if (("Set_your_unique_tag_here").equalsIgnoreCase(job.getTag())) {
//PERFORM YOUR TASK HERE_ WHICH YOU WANT TO RUN IN ASYNCTASK OR SERVICE
//IT WILL RUN EVEN IF APP IS IN BACKGROUND /CLOSED
}
} catch (Throwable ignored) {
}
}
}).start();
return false;
}
#Override
public boolean onStopJob(JobParameters job) {
return false;
}
}
I start a Service from an activity that gets messages from service and shows in a Dialog. When I click back or Home button, app is killed. And app is not found in the multitasking area. I didn't write any code on onBackPressed(). How may I rectify this issue? Service Code.
public class BleepService extends Service{
String gotAlert;
Context context;
String drAlert=null;
public static boolean status = false;
public static final String TAG = BleepService.class.getSimpleName();
int counter = 0;
static final int UPDATE_INTERVAL = 5000;
private Timer timer = new Timer();
String resServer;
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("SERVICE", "COMES TO THE ON STARTCOMMAND");
doRepeat();
//return super.onStartCommand(intent, flags, startId);
return START_STICKY;
}
private void doRepeat() {
Log.i("SERVICE", "COMES TO THE DOREPEAT METHOD");
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
new GetStatus().execute();
}
}, 1000, UPDATE_INTERVAL);
}
class GetStatus extends AsyncTask<Void, Void, String>
{
#Override
protected String doInBackground(Void... params) {
ServiceHandler sh = new ServiceHandler();
resServer = sh.makeServiceCall(Urllist.urlGetPagerStatus, ServiceHandler.GET);
while(resServer.equals("1"))
{
status = true;
resServer = sh.makeServiceCall(Urllist.urlGetMsg, ServiceHandler.GET);
}
return resServer;
}
#Override
protected void onPostExecute(String result) {
Log.i("SERVICE", "COMES TO THE GetStatus AsyncTask Class");
super.onPostExecute(result);
if(!result.equals("0"))
{
Intent i = new Intent("com.bleep.DR_ALERT_MESSAGE");
i.putExtra("msg", result);
sendBroadcast(i);
}else{
Toast.makeText(getApplicationContext(), "No New Message", Toast.LENGTH_SHORT).show();
}
}
}
#Override
public void onDestroy() {
//timer.cancel();
//super.onDestroy();
/*if (timer != null){
timer.cancel();
}*/
}
}
Make sure your Service returns START_STICKY in its onStartCommand. This way OS will restart it if it ever gets killed.
It is legal for an app to be killed by the Android any time while the app is in the background.
However, OS very rarely kills Services. Are you sure you do not somehow kill it yourself, maybe, due to some bug?
I am making AsynkTask within Service like this
public class MyService extends Service {
private final IBinder mBinder = new LocalBinder();
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.v("log_tag", "Service started");
ReceiveAsyncTask receiveATask = new ReceiveAsyncTask();
receiveATask.execute();
return super.onStartCommand(intent, flags, startId);
}
#Override
public IBinder onBind(Intent intent) {
Log.v("log_tag", "onBind");
return mBinder;
}
public class LocalBinder extends Binder {
MyService getService() {
return MyService.this;
}
}
class ReceiveAsyncTask extends AsyncTask<Void, Void, String> {
#Override
protected String doInBackground(Void... params) {
taskDummy();
return null;
}
#Override
protected void onPreExecute() {
Log.v("log_tag", "onPreExecute");
super.onPreExecute();
}
#Override
protected void onPostExecute(String result) {
Log.v("log_tag", "onPostExecute");
super.onPostExecute(result);
}
#Override
protected void onCancelled() {
Log.v("log_tag", "onPostExecute");
super.onCancelled();
}
}
private void taskDummy() {
while (true) {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.v("log_tag", "taskDummy");
}
}
/** method for clients */
public int getRandomNumber() {
Log.v("log_tag", "inner Method called");
return 100;
}
}
when I am running the application it starting to print "taskDummy" every two second as expected, when I close application by prssing Back buttin still log printing continue as expected, but when I removed application from recent apps stack it stopped printing this should not happen I want my asynch task continue in this situation. even I can see my service is running from setting. please advise me.
You need to explicitly call of asyncTaskObject.cancel(true); in onDestroy of your Activity(Or your event whenever you want.)
And then rewrite your while loop logic , something like that:
// Create this variable is Your Asyantask class.
private boolean isRunning = true;
#Override
protected void onCancelled() {
isRunning = false;
}
#Override
protected String doInBackground(Void... params) {
while (isRunning ) {
// Your processing
}
return null;
}
It's a known bug: swiping the service out from recent apps destroys it.
Try following solution.
I develop android app use GCM, i want to send heartbeat for every 5 minutes at once, i create it when service is run,these are my codes,
public class sendHeartbeat extends Service{
private Handler customHandler = new Handler();
private static final String TAG = "MyService";
#Override
public IBinder onBind(Intent arg0) {
return null;
}
#Override
public void onCreate() {
Log.d(TAG, "onCreate");
}
#Override
public void onStart(Intent intent, int startId) {
Log.d(TAG, "onStart");
customHandler.postDelayed(updateTimerThread, 0);
}
#Override
public void onDestroy() {
Log.d(TAG, "onDestroy");
}
private Runnable updateTimerThread = new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
new syncGetHeartbeat().execute();
Log.d("send hearbeat","send hearrrrrrrbeat");
customHandler.postDelayed(this, 260000);
}
};
class syncGetHeartbeat extends AsyncTask<Void, Void, String> {
#Override
protected String doInBackground(Void... unsued) {
try {
String varId="naengoland";
String url = "http://mydomain.com/gcmserver/getHeartbeat.php?id="+varId;
getRequestJSON(url);
return null;
} catch (Exception e) {
Log.e(e.getClass().getName(), "service get hertbeat "+ e.toString());
return null;
}
}
#Override
protected void onProgressUpdate(Void... unsued) {
}
#Override
protected void onPostExecute(String sResponse) {
}
}
public String getRequestJSON(String Url){
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(Url);
try{
client.execute(request);
}catch(Exception ex){
}
return null;
}
}
I successfully send the heartbeat for every 5 minutes, but the problem is my app running slowly and consume battery a lot, is there any way to send heartbeat beside doing my way?
i mean,the better method than my method.
Please help.
Using TimerTask provides better performance than using Thread (ref).. However TimerTask isn't good in handling multiple threads at the same time which isn't a concern in your case because you are doing one task repeatedly.
here is the code for Timer:
first initialize a Timer:
private Timer timer;
in onCreate:
timer = new Timer();
then within onStart:
timer.scheduleAtFixedRate(new TimerTask() {
#Override
public void run() {
// TODO Auto-generated method stub
new syncGetHeartbeat().execute();
Log.d("send hearbeat","send hearrrrrrrbeat");
}
}, 0, 300000); //means start at 0 second and each 5 mins (300000 ms) run the task
I'm not sure if there is another solution that has better performance however this is absolutely better than running thread in a fixed rate.