getApplicationContext錯誤

我試圖以編程方式將我的設備令牌從我的Android應用程序存儲到AWS SNS平臺應用程序。getApplicationContext錯誤

我在getApplicationContext()方法中出錯。任何人有解決這個錯誤？

這是我的代碼：

public class RegisterIdForAWS extends AsyncTask<String, Void, Void> { 
    private Exception exception; 

    @Override 
    protected Void doInBackground(String... strings) { 
     try { 
      String pushNotificationRegId = FirebaseInstanceId.getInstance().getToken(); 

      if (pushNotificationRegId != null) { 

       CognitoCachingCredentialsProvider provider = new CognitoCachingCredentialsProvider(
         getApplicationContext(), 
         "us-west-2:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
         Regions.US_WEST_2); 
       String platformApplicationArn = "arn:aws:sns:us-west-2:11111111111:app/GCM/123"; 
       AmazonSNSClient pushClient = new AmazonSNSClient(provider); 
       pushClient.setRegion(Region.getRegion(Regions.US_WEST_2)); 

       String customPushData = ""; 
       CreatePlatformEndpointRequest platformEndpointRequest = new CreatePlatformEndpointRequest(); 
       platformEndpointRequest.setCustomUserData(customPushData); 
       platformEndpointRequest.setToken(pushNotificationRegId); 
       platformEndpointRequest.setPlatformApplicationArn(platformApplicationArn); 
       CreatePlatformEndpointResult result = pushClient.createPlatformEndpoint(platformEndpointRequest); 
       Log.w(TAG, "Amazon Push reg result: " + result); 
      } 
     } catch (Exception e) { 
      this.exception = e; 
     } 

     return null; 
    } 

    protected void onPostExecute(String text) { 
     Log.w(TAG, "Amazon Push reg Finished"); 
    } 


}

來源

2017-07-27 Ashish

在哪個Activity中你使用這個AsyncTask並給出正確的流程以獲得詳細信息，這樣可以正確地傳遞答案。否則，@Andrea Ebano給出的答案是正確的。 –

在你的異步類的構造函數，通過上下文

private Context mContext; 

public RegisterIdForAWS (Context context){ 
    mContext = context; 
}

和實例類是這樣的：

RegisterIdForAWS task = new RegisterIdForAWS (context);

希望它能幫助。

來源

2017-07-27 08:51:02

getApplicationContext錯誤

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