我有一个抽屉布局，他打电话给许多片段并且他们有asynctask，我也创建了一个通知服务，它在api级别的工作非常好＆lt; 11但是当水平> 10片段的asynctask仅在服务未运行时起作用，为什么？
我的服务代码在这里
public class NotificationService extends Service {
MyTask myTask;
private final String url_notificaciones = "http://www.domain.com/domain/getNotificaciones.php";
private static final String TAG_TIPO_NOTIFICACION = "tipo_notificacion";
private static final String TAG_TITULO_NOTIFICACION= "titulo_notificacion";
private static final String TAG_DESCRIPCION_NOTIFICACION= "descripcion_notificacion";
private String jsonResult;
SessionManagement session;
boolean InitializeNotificationManager = true;
private HashMap<String, String> user;
private String id_datos_usuarios_session;
private JsonReadTask task;
private Handler handler = new Handler();
private TaskCanceler taskCanceler;
@Override
public void onCreate() {
super.onCreate();
try {
session = new SessionManagement(getApplication());
user = session.getUserDetails();
id_datos_usuarios_session = user.get(SessionManagement.KEY_ID_DATOS_USUARIOS).toString();
}catch (Exception e){
InitializeNotificationManager = false;
}
myTask = new MyTask();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
myTask.execute();
return START_NOT_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
myTask.cancel(true);
}
@Override
public IBinder onBind(Intent intent) {
throw new UnsupportedOperationException("Not yet implemented");
}
private class MyTask extends AsyncTask<String, String, String> {
private String date;
private boolean cent;
@Override
protected void onPreExecute() {
super.onPreExecute();
cent = true;
}
@Override
protected String doInBackground(String... params) {
while (cent) {
try {
if(isNetworkStatusAvialable (getApplication())) {
accessWebService();
}
// Stop 20s
Thread.sleep(20000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(String... values) {
//Toast.makeText(getApplicationContext(), "Hora actual: ", Toast.LENGTH_SHORT).show();
}
@Override
protected void onCancelled() {
super.onCancelled();
cent = false;
}
}
public void accessWebService(){
task = new JsonReadTask();
taskCanceler = new TaskCanceler(task);
handler.postDelayed(taskCanceler, 15*1000);
task.execute(new String[]{url_notificaciones});
}
private class JsonReadTask extends AsyncTask<String, Void, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String... params) {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(params[0]);
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("get_app_id_datos_usuarios", id_datos_usuarios_session));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
jsonResult = inputStreamToString(
response.getEntity().getContent()).toString();
}
catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private StringBuilder inputStreamToString(InputStream is) {
String rLine = "";
StringBuilder answer = new StringBuilder();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
try {
while ((rLine = rd.readLine()) != null) {
answer.append(rLine);
}
} catch (IOException e) {
// e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error..." + e.toString(), Toast.LENGTH_LONG).show();
}
return answer;
}
@Override
protected void onPostExecute(String result) {
ListDrwaer();
}
// build hash set for list view
public void ListDrwaer() {
try {
JSONObject jsonResponse = new JSONObject(jsonResult);
JSONArray jsonMainNode = jsonResponse.optJSONArray("notification");
JSONObject jsonChildNode = jsonMainNode.getJSONObject(0);
String tipo_notificacion = jsonChildNode.getString(TAG_TIPO_NOTIFICACION);
String titulo_notificacion = jsonChildNode.getString(TAG_TITULO_NOTIFICACION);
String descripcion_notificacion = jsonChildNode.getString(TAG_DESCRIPCION_NOTIFICACION);
if(tipo_notificacion.equals("1")) {
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.putExtra("MenuNotificationFragment", "MyFriendsRequired");
PendingIntent pIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, 0);
// Creamos la notificación. Las acciones son de "mentirijilla"
Notification noti = new NotificationCompat.Builder(getApplicationContext())
.setContentTitle(titulo_notificacion)
.setContentText(descripcion_notificacion).setSmallIcon(R.mipmap.icon_app)
.setContentIntent(pIntent)
.setLights(0xffff00, 4000, 100)
/*.addAction(R.drawable.ic_arrow, "Llamada", pIntent)
.addAction(R.drawable.ic_arrow, "Más", pIntent)
.addAction(R.drawable.ic_arrow, "Mucho Más", pIntent)*/.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// Ocultamos la notificación si ha sido ya seleccionada
noti.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, noti);
//Sound notification
try {
Uri ringtoneUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone ringtone = RingtoneManager.getRingtone(getApplicationContext(), ringtoneUri);
ringtone.play();
} catch (Exception e) {
}
//Vibrate notification
try {
// Get instance of Vibrator from current Context
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
// Start without a delay
// Vibrate for 100 milliseconds
// Sleep for 1000 milliseconds
long[] pattern = {0, 100, 2000};
// The '0' here means to repeat indefinitely
// '0' is actually the index at which the pattern keeps repeating from (the start)
// To repeat the pattern from any other point, you could increase the index, e.g. '1'
v.vibrate(pattern, -1);
} catch (Exception e) {
}
}else if(tipo_notificacion.equals("2")){
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.putExtra("MenuNotificationFragment", "MyBussinesRequired");
PendingIntent pIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, 0);
// Creamos la notificación. Las acciones son de "mentirijilla"
Notification noti = new NotificationCompat.Builder(getApplicationContext())
.setContentTitle(titulo_notificacion)
.setContentText(descripcion_notificacion).setSmallIcon(R.mipmap.icon_app)
.setContentIntent(pIntent)
.setLights(0xffff00, 4000, 100)
/*.addAction(R.drawable.ic_arrow, "Llamada", pIntent)
.addAction(R.drawable.ic_arrow, "Más", pIntent)
.addAction(R.drawable.ic_arrow, "Mucho Más", pIntent)*/.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// Ocultamos la notificación si ha sido ya seleccionada
noti.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, noti);
//Sound notification
try {
Uri ringtoneUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone ringtone = RingtoneManager.getRingtone(getApplicationContext(), ringtoneUri);
ringtone.play();
} catch (Exception e) {
}
//Vibrate notification
try {
// Get instance of Vibrator from current Context
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
// Start without a delay
// Vibrate for 100 milliseconds
// Sleep for 1000 milliseconds
long[] pattern = {0, 100, 2000};
// The '0' here means to repeat indefinitely
// '0' is actually the index at which the pattern keeps repeating from (the start)
// To repeat the pattern from any other point, you could increase the index, e.g. '1'
v.vibrate(pattern, -1);
} catch (Exception e) {
}
}
} catch (JSONException e) {
}
}
}// end async task
//If the internet connection is ok
public static boolean isNetworkStatusAvialable (Context context) {
try {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager != null) {
NetworkInfo netInfos = connectivityManager.getActiveNetworkInfo();
if (netInfos != null)
if (netInfos.isConnected())
return true;
}
}catch (Exception e){
return false;
}
return false;
}
public class TaskCanceler implements Runnable{
private AsyncTask taskR;
public TaskCanceler(AsyncTask task) {
this.taskR = task;
}
@Override
public void run() {
if (task.getStatus() == AsyncTask.Status.RUNNING ) {
task.cancel(true);
}
}
}
}
答案 0 :(得分：1)
从Android 11开始，AsyncTask对象共享一个线程。因此，您的服务正在阻止该线程，并且片段无法运行。最简单的解决方案在这里非常明显，不要将AsyncTask用于服务。在那里使用它甚至没有意义，因为AsyncTask旨在将结果传回UI线程，这是您的服务不需要做的事情。这是一个可能的解决方案：
public class MyService extends Service implements Runnable {
private HandlerThread = ht;
private Handler handler;
@Override
public void onCreate() {
super.onCreate();
try {
session = new SessionManagement(getApplication());
user = session.getUserDetails();
id_datos_usuarios_session = user.get(SessionManagement.KEY_ID_DATOS_USUARIOS).toString();
}catch (Exception e){
InitializeNotificationManager = false;
}
ht = new HandlerThread("MyService");
ht.start();
handler = new Handler(ht.getLooper());
handler.post(this);
}
@Override
public void onDestroy() {
super.onDestroy();
handler.removeCallbacks(this);
ht.quit();
ht = null;
handler = null;
}
@Override
public void run(){
if(isNetworkStatusAvialable (getApplication())) {
accessWebService();
}
handler.postDelayed(20000, this);
}
}