\nBuild Target<\/strong>: Android 2.3.3
\nApplication name<\/strong>: ServiceSimple
\nPackage name<\/strong>: ru.startandroid.develop.p0921servicesimple
\nCreate Activity<\/strong>: MainActivity
\nAdd such text to strings.xml<\/strong>:<\/p>\n
[code language=”xml”]
\n<string name="start">Start service<\/string>
\n<string name="stop">Stop service<\/string>
\n[\/code]<\/p>\n
And such text to main.xml<\/strong>:<\/p>\n [code language=”xml”] Two buttons \u2013 to start and stop the service, and the ProgressBar.<\/p>\n Create MyService<\/strong> class inherited from the android.app.Service<\/strong> near the MainActivity<\/strong>:<\/p>\n MyService.java:<\/strong><\/p>\n [code language=”java”] import android.app.Service; public class MyService extends Service {<\/p>\n \tfinal String LOG_TAG = "myLogs";<\/p>\n \tpublic void onCreate() { \tpublic int onStartCommand(Intent intent, int flags, int startId) { \tpublic void onDestroy() { \tpublic IBinder onBind(Intent intent) { \tvoid someTask() { The service has onCreate<\/strong> and onDestroy<\/strong> methods that run in case of starting and stopping the service.<\/p>\n OnStartCommand<\/strong> method triggers when the service starts with startService<\/strong> method. There we run our method someTask<\/strong>, which is empty for now. OnStartCommand<\/strong> has inbound and outbound parameters which are not used for now.<\/p>\n We will code the work of the service in someTask<\/strong> method.<\/p>\n We should note the service in the manifest:<\/p>\n MainActivity.java<\/strong><\/p>\n [code language=”java”] import android.app.Activity; public class MainActivity extends Activity {<\/p>\n \tfinal String LOG_TAG = "myLogs";<\/p>\n \t\tpublic void onCreate(Bundle savedInstanceState) { \t\t}<\/p>\n \t\t void onClickStart(View v) { \t\tpublic void onClickStop(View v) { Here we have two methods that trigger on the Start<\/strong> service and Stop service<\/strong> buttons. Respectively in them, we start and stop the service using startService<\/strong> and stopService<\/strong> methods. Inbound we pass Intent, that points to the service.<\/p>\n So let\u2019s save everything and run the application:<\/p>\n Push Start service<\/strong> and check the log:<\/p>\n onStartCommand <\/strong><\/p>\n The service was created, onCreate<\/strong> and onStartCommand<\/strong> methods triggered.<\/p>\n Push Start service<\/strong> one more time:<\/p>\n onStartCommand\u00a0<\/em><\/span><\/p>\n The service is already created so \u00a0onCreate<\/strong> didn\u2019t trigger, but onStartCommand<\/strong> did.<\/p>\n Push Stop service<\/strong>:<\/p>\n Service was destroyed.<\/p>\n Let\u2019s make sure that service doesn\u2019t depend on the application. Push Start service<\/strong><\/p>\n onCreate<\/em><\/span> Service have started. Close the application pushing the Back button. Logs are empty, onDestroy<\/strong> method didn\u2019t trigger, service is still working. Open our app again and push Stop service<\/strong>. In logs we see:<\/p>\n onDestroy<\/strong><\/p>\n The service is destroyed.<\/p>\n Now let\u2019s try to do something meaningful in onStartCommand<\/strong> method. Rewrite the someTask<\/strong> method:<\/p>\n [code language=”java”] Let\u2019s output the notes from the service to the log each second:<\/p>\n onCreate<\/em><\/span> So the service is running in the main thread.<\/p>\n Let\u2019s expose the cycle with pauses to the separate thread and also run the stopSelf<\/strong> method. Rewrite the someTask<\/strong> method:<\/p>\n [code language=”java”] We have exposed the code to the separate thread and added the stopSelf<\/strong> method which is similar to stopService<\/strong> method. It stops the service that called it. onCreate<\/em><\/span> So the service was created, done its job and was stopped by the stopSelf<\/strong> method.<\/p>\n In case you missed, we posted once more sample Android application code<\/a> before<\/p>\n We recommend viewing this Android development sample at the beginning, and during, your course of computer science so that you have an idea what your professor expects you to hand in. The sample of assignment is perfect for most students and contains material that can help you to deal with your own homework. If you have any question about your assignment, you can always get online assignment help<\/a> from AssignmentShark.com. We have a team of experts that includes only professionals with long-term experience in dealing with any assignment. All assignments are done quickly and according to your requirements. Use our service to make your homework done successfully.<\/em><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":" Hello! Today I want to show you how to create, start and stop simple service in Android OS. Thus, the service is a certain task that runs in the background and does not use UI. The service can be started and stopped from applications and other services. Also, you can connect to the running service […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53,35],"tags":[],"class_list":["post-4592","post","type-post","status-publish","format-standard","hentry","category-it","category-samples"],"_links":{"self":[{"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/posts\/4592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/comments?post=4592"}],"version-history":[{"count":15,"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/posts\/4592\/revisions"}],"predecessor-version":[{"id":13009,"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/posts\/4592\/revisions\/13009"}],"wp:attachment":[{"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/media?parent=4592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/categories?post=4592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/assignmentshark.com\/blog\/wp-json\/wp\/v2\/tags?post=4592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n<?xml version="1.0" encoding="utf-8"?>
\n<LinearLayout xmlns:android="http:\/\/schemas.android.com\/apk\/res\/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical">
\n\t<Button android:id="@+id\/btnStart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="onClickStart" android:text="@string\/start">
\n\t<\/Button>
\n\t<Button android:id="@+id\/btnStop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="onClickStop" android:text="@string\/stop">
\n\t<\/Button>
\n\t<ProgressBar android:layout_width="wrap_content" android:layout_height="wrap_content" android:indeterminate="true">
\n\t<\/ProgressBar>
\n<\/LinearLayout>
\n[\/code]<\/p>\n![\"android-development-sample-1\"](\"https:\/\/assignmentshark.com\/blog\/wp-content\/uploads\/2016\/10\/android-development-sample-1.png\")
<\/a><\/p>\n
\npackage ru.startandroid.develop.p0921servicesimple;<\/p>\n
\nimport android.content.Intent;
\nimport android.os.IBinder;
\nimport android.util.Log;<\/p>\n
\n\t\tsuper.onCreate();
\n\t\tLog.d(LOG_TAG, "onCreate");
\n\t}<\/p>\n
\n\t\tLog.d(LOG_TAG, "onStartCommand");
\n\t\tsomeTask();
\n\t\treturn super.onStartCommand(intent, flags, startId);
\n\t}<\/p>\n
\n\t\tsuper.onDestroy();
\n\t\tLog.d(LOG_TAG, "onDestroy");
\n\t}<\/p>\n
\n\t\tLog.d(LOG_TAG, "onBind");
\n\t\treturn null;
\n\t}<\/p>\n
\n\t}
\n}
\n[\/code]<\/p>\n<\/a><\/p>\n
\npackage ru.startandroid.develop.p0921servicesimple;<\/p>\n
\nimport android.content.Intent;
\nimport android.os.Bundle;
\nimport android.view.View;<\/p>\n
\n\t\t\tsuper.onCreate(savedInstanceState);
\n\t\t\tsetContentView(R.layout.main);<\/p>\n
\n\t\t\tstartService(new Intent(this, MyService.class));
\n\t\t}<\/p>\n
\n\t\t\tstopService(new Intent(this, MyService.class));
\n\t\t}
\n}
\n[\/code]<\/p>\n<\/a><\/p>\n
\nonStartCommand<\/em> <\/span><\/p>\n
\nLong push the Home button to see the recent applications:<\/p>\n<\/a><\/p>\n
\nvoid someTask() {
\n\tfor (int i = 1; i<=5; i++) {
\n\t\tLog.d(LOG_TAG, "i = " + i);
\n\t\ttry {
\n\t\t\tTimeUnit.SECONDS.sleep(1);
\n\t\t} catch (InterruptedException e) {
\n\t\t\te.printStackTrace();
\n\t\t}
\n\t}
\n}
\n[\/code]<\/p>\n
\n onStartCommand<\/em><\/span>
\n i = 1<\/em><\/span>
\n i = 2<\/em><\/span>
\n i = 3<\/em><\/span>
\n i = 4<\/em><\/span>
\n i = 5<\/em><\/span><\/p>\n
\nvoid someTask() {
\n\tnew Thread(new Runnable() {
\n\t\tpublic void run() {
\n\t\t\tfor (int i = 1; i<=5; i++) {
\n\t\t\tLog.d(LOG_TAG, "i = " + i);
\n\t\ttry {
\n\t\t\tTimeUnit.SECONDS.sleep(1);
\n\t\t} catch (InterruptedException e) {
\n\t\t\te.printStackTrace();
\n\t\t}
\n\t}
\n\tstopSelf();
\n }
\n }).start();
\n}
\n[\/code]<\/p>\n
\nSave everything, execute and push Start service. ProgressBar<\/strong> is spinning, screen is not blocked, logs are coming:<\/p>\n
\nonStartCommand<\/em><\/span>
\ni = 1<\/em><\/span>
\ni = 2<\/em><\/span>
\ni = 3<\/em><\/span>
\ni = 4<\/em><\/span>
\ni = 5<\/em><\/span>
\nonDestroy<\/em> <\/span><\/p>\n