Question

感谢您阅读我的问题我编写简单的应用程序来向运行后台的服务中显示通知：
我将此写入服务类，以便向我显示简单的通知：

NotificationCompat.Builder mBuilder =   new NotificationCompat.Builder(getBaseContext())
                        .setSmallIcon(R.drawable.maleki) // notification icon
                        .setContentTitle("آذر گشت") // title for notification
                        .setContentText("شما"+" "+jsonArray.length()+" "+"خبر جدید دارید") // message for notification
                        .setAutoCancel(true); // clear notification after click

但没有告诉我通知，发生了什么？谢谢。

我的完整服务类代码是：

public class newsservice extends Service {
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // your code
        new HttpAsyncTask().execute("http://tour.maxitem.org/newslenght.aspx");
        //this.stopSelf();

        return Service.START_FLAG_REDELIVERY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    //************************************************************
    //***************************************AsyncTask

    private class HttpAsyncTask extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls) {

            TourMyCountry country=new TourMyCountry();
            country.id="jamalnews";//.setName(etName.getText().toString());
            return POST(urls[0],country);
        }
        // onPostExecute displays the results of the AsyncTask.
        // onPostExecute displays the results of the AsyncTask.
        @Override
        protected void onPostExecute(String result) {


            try {
                JSONArray jsonArray=new JSONArray(result);
                /*for(int i=0;i<jsonArray.length();i++)
                {
                    JSONObject JsonObj=jsonArray.getJSONObject(i);
                    String countryname=JsonObj.getString("countryname");

                }*/

                /*NotificationCompat.Builder mBuilder =   new NotificationCompat.Builder(getBaseContext())
                        .setSmallIcon(R.drawable.maleki) // notification icon
                        .setContentTitle("آذر گشت") // title for notification
                        .setContentText("شما"+" "+jsonArray.length()+" "+"خبر جدید دارید") // message for notification
                        .setAutoCancel(true); // clear notification after click*/

            } catch (JSONException e) {
                e.printStackTrace();
            }

        }
    }//END OF ASYNCTASK

    //**************************************POST LEVEL
    public static String POST(String url, TourMyCountry myCountry){
        InputStream inputStream = null;
        String result = "";
        try {
            // 1. create HttpClient
            HttpClient httpclient = new DefaultHttpClient();
            // 2. make POST request to the given URL
            HttpPost httpPost = new HttpPost(url);
            String json = "";
            // 3. build jsonObject
            JSONObject jsonObject = new JSONObject();
            jsonObject.accumulate("id", myCountry.id);
            // 4. convert JSONObject to JSON to String
            json = jsonObject.toString();
            // 5. set json to StringEntity
            StringEntity se = new StringEntity(json);

            // 6. set httpPost Entity
            httpPost.setEntity(se);

            // 7. Set some headers to inform server about the type of the content
            httpPost.setHeader("Accept", "application/json");
            httpPost.setHeader("Content-type", "application/json");

            // 8. Execute POST request to the given URL
            HttpResponse httpResponse = httpclient.execute(httpPost);

            // 9. receive response as inputStream
            inputStream = httpResponse.getEntity().getContent();

            // 10. convert inputstream to string
            if(inputStream != null)
                result = convertInputStreamToString(inputStream);
            else
                result = "Did not work!";
            Log.d("behzad in the service:",result);

        } catch (Exception e) {
            Log.d("InputStream", e.getLocalizedMessage());
        }

        // 11. return result
        return result;
    }//END OF POST BACK TO RETURN

    //************************************************convertInputStreamToString
    private static String convertInputStreamToString(InputStream inputStream) throws IOException {
        BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
        String line = "";
        String result = "";
        while((line = bufferedReader.readLine()) != null)
            result += line;

        inputStream.close();
        return result;

    }
    //***************************************************************


    public class TourMyCountry{
        String id;
    }

}

Answer 1

试试这个，

NotificationManager mNotifyMgr = (NotificationManager)   getSystemService(Context.NOTIFICATION_SERVICE);

// your code for notification builder
mNotifyMgr.notify(1, mBuilder.build());

Answer 2

我没有看到实际设置通知的方法。看起来应该是这样的：

mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify(mId, mBuilder.build());

查看此链接，其中介绍了如何发送通知：http://developer.android.com/guide/topics/ui/notifiers/notifications.html

底线，您的代码不完整。

Android在服务方法中显示通知

2 个答案: