如何打開相機中的onPostExecute方法的AsyncTask

-1

我想在AsyncTask中打開相機，但在doInBackground之後的時候掛鉤的方法。實際上我從網絡（servlet）檢索數據，如果檢索到的數據與條件匹配，我設置了一個變量說int x=1 ; if (x==1) { camera.open() ;}如何打開相機中的onPostExecute方法的AsyncTask

請建議我，該怎麼辦？

我已經寫了一些代碼

廣播接收器

public class StartAtBootServiceReceiver extends BroadcastReceiver { 
    public void onReceive(Context context, Intent intent) { 

     // Start periodic service. 
     Calendar cal = Calendar.getInstance(); 

     Intent srvIntent = new Intent(context, StartAtBootService.class); // NoLopper 

     PendingIntent pIntent = PendingIntent.getService(context, 0, srvIntent, 0); 
     // Use context argument to access service 
     AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); 

     // Repeat every 5 seconds 
     alarm.setInexactRepeating(
       AlarmManager.RTC_WAKEUP, 
       cal.getTimeInMillis(), 
       10000, 
       pIntent 
     ); 
    } 
}

這是服務

public class StartAtBootService extends Service { 
    public static final String url = "http://10.0.2.2:1010/junction/AsynLocInsertionServ"; 

    String imei = "1234"; 
    String returnString = null; 
    Integer returnedValue = 0; 

    private static final int CAMERA_REQUEST = 1888; 

    public IBinder onBind(Intent intent) { 
     return null; 
    } 

    @Override 
    public void onCreate() { 
     Log.d("StartServiceAtBoot1", "StartAtBootService Created1"); 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     Log.d("StartServiceAtBoot2", "StartAtBootService -- onStartCommand()"); 

     new GetXMLTask().execute(url); // calls the AsyncTask 

     return START_STICKY; 
     // return START_REDELIVER_INTENT ; 
    } 

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

      String output = null; 

      try { 
       DefaultHttpClient httpClient = new DefaultHttpClient(); 
       // ResponseHandler<String> res = new BasicResponseHandler(); 
       HttpPost httpPost = new HttpPost(url); 

       try { 
        String Imei = "10101"; 
        String Latitude = "333.33"; 
        String Longitude = "44.44"; 

        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
        nameValuePairs.add(new BasicNameValuePair("param1imei", 
          Imei)); 
        nameValuePairs.add(new BasicNameValuePair("param2lati", 
          Latitude)); 
        nameValuePairs.add(new BasicNameValuePair("param3longi", 
          Longitude)); 

        httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

        HttpResponse httpResponse = httpClient.execute(httpPost); 
        // String response = httpClient.execute(httpPost, res); 

        HttpEntity httpEntity = httpResponse.getEntity(); 
        output = EntityUtils.toString(httpEntity); 

       }// end of inner try block 
       catch (UnsupportedEncodingException e) { 
        e.printStackTrace(); 
       } catch (ClientProtocolException e) { 
        e.printStackTrace(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } // end of outer try block 
      catch (Exception e) { 
       Log.e("log_tag", "Error in http connection " + e.toString()); 
      } 
      return output; 
     } // end of getOutputFromUrl method 

     @Override 
     protected void onPostExecute(String output) { 
      super.onPostExecute(output); 

      Log.d("done LAtlong stored in mysql_onPost method", 
        " " + output.toString()); 
      if (output == 1) { 
       Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); 
       getApplicationContext().startActivityForResult(intent, 0); 
      } 
     } // onpost 
    } // end of GetXMLTask 
}

來源

2014-05-06 Reshi

這個代碼，你能不能請張貼更多的代碼。 – RvdK

我還沒有編碼..任何建議先生？這個怎麼做？ – Reshi

設置的結果數據類型爲int 並返回1（如果匹配）在doInBackground結尾（）

at onPostexecute（int result），1將被傳遞，並且在那裏它可以安全地啓動相機。

來源

2014-05-06 08:05:35 Yazan

可以代碼，只有攝像頭啓動.. – Reshi

比方說您從服務器獲取價值，它是在x然後做

onPostExecute(void result) { 

if(x==1) { 
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); 
startActivityForResult(intent, 0); 
} 

}

並添加用途權限在manifest文件。

<uses-permission android:name="android.permission.CAMERA"></uses-permission>

更多，read here

來源

2014-05-06 08:24:09

它工作正常,,但我有在BOOT_COMPLETE開始的AsynTask .. myTask my_StartAtBootService是在BOOT_COMPLETE上以固定鬧鐘時間開始的服務,,, myTask是我放置AsynTask的類。我剛剛在OnStartCommand（）鉤子方法的服務中創建了mytask的對象... 希望你得到我..thx – Reshi

如果你有一個上下文，那麼只需做context.startActivityForResult（intent，0）;否則在asyntask構造函數中傳遞上下文 –

我們可以寫上onPostexecute()

// global declaration 
private static final int CAMERA_REQUEST = 1888; 

Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
startActivityForResult(cameraIntent, CAMERA_REQUEST);

來源

2014-05-06 08:25:28 NagarjunaReddy

檢查我的代碼??仍然沒有工作 – Reshi

如何打開相機中的onPostExecute方法的AsyncTask

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