应用程序在android中被杀死后后台服务不工作
我试图在服务中每隔15秒加载一个URL(API)。一切正常,但当应用程序被终止时,URL不会被调用。我的应用程序中不需要任何UI。我只想在应用程序被关闭时在后台工作。我两天来一直在寻找解决办法,但都没有奏效。请帮忙! 这是我的服务代码:应用程序在android中被杀死后后台服务不工作,android,android-service,android-volley,android-workmanager,Android,Android Service,Android Volley,Android Workmanager,我试图在服务中每隔15秒加载一个URL(API)。一切正常,但当应用程序被终止时,URL不会被调用。我的应用程序中不需要任何UI。我只想在应用程序被关闭时在后台工作。我两天来一直在寻找解决办法,但都没有奏效。请帮忙! 这是我的服务代码: public class MyService extends Service { Handler handler = new Handler(); Runnable runnable; int delay = 15*1000; String data ; @O
public class MyService extends Service {
Handler handler = new Handler();
Runnable runnable;
int delay = 15*1000;
String data ;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(final Intent intent, int flags, int startId) {
handler.postDelayed( runnable = new Runnable() {
public void run() {
data = (String) intent.getExtras().get("data");
Toast.makeText(MyService.this, ""+data, Toast.LENGTH_SHORT).show();
loadURL(data);
handler.postDelayed(runnable, delay);
}
}, delay);
return START_STICKY ;
}
@Override
public void onDestroy() {
handler.postDelayed( runnable = new Runnable() {
public void run() {
Toast.makeText(MyService.this, ""+data, Toast.LENGTH_SHORT).show();
loadURL(data);
handler.postDelayed(runnable, delay);
}
}, delay);
}
public void loadURL(String data){
try{
RequestFuture<JSONObject> requestFuture=RequestFuture.newFuture();
final String mURL = "http://192.168.1.12/att.php?emp_id=" + data + "&status=&submit=Insert";
JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST,
mURL,new JSONObject(),requestFuture,requestFuture);
MySingleton.getInstance(this).addToRequestQueue(request);
Toast.makeText(this, "Done", Toast.LENGTH_SHORT).show();
try {
JSONObject object= requestFuture.get(10, TimeUnit.SECONDS);
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e){
Toast.makeText(this, ""+e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}
您必须将该后台服务转换为前台服务,因为从android Oreo开始的后台执行限制 请查看此链接以更好地了解:
public class MainActivity extends AppCompatActivity {
String data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
data = getIntent().getStringExtra("ID");
Intent intent = new Intent(MainActivity.this, MyService.class);
intent.putExtra("data", data);
startService(intent);
}
}