onActivityResult（）未从Activity中调用

我可以编辑&从一个Activity（EditActivity.java）保存数据，但更新的数据不会显示（或继续）到下一个Activity（ViewActivity.java ）点击保存按钮。如果返回到EditActivity页面，我可以看到EditText字段上的更改。onActivityResult（）未从Activity中调用

EditActivity.java

btnSave.setOnClickListener(new View.OnClickListener() { 

     public void onClick(View arg0) { 
      // starting background task to update request 
      new SaveRequestDetails().execute(); 
     } 
    }); 

    class SaveRequestDetails extends AsyncTask<String, String, String> { 


    protected String doInBackground(String... args) { 

     // getting updated data from EditTexts 
     String request_title = txtTitle.getText().toString(); 
     String request_date = txtSdate.getText().toString(); 
     String reqEndDate = txtEdate.getText().toString(); 
     String hours = txtHours.getText().toString(); 
     String reason = txtReason.getText().toString(); 
     String explanation = txtExp.getText().toString(); 


     List<NameValuePair> params = new ArrayList<NameValuePair>(); 
     params.add(new BasicNameValuePair(TAG_ID, request_id)); 
     params.add(new BasicNameValuePair(TAG_TITLE, request_title)); 
     params.add(new BasicNameValuePair(TAG_SDATE, request_date)); 
     params.add(new BasicNameValuePair(TAG_EDATE, reqEndDate)); 
     params.add(new BasicNameValuePair(TAG_HOURS, hours)); 
     params.add(new BasicNameValuePair(TAG_REASON, reason)); 
     params.add(new BasicNameValuePair(TAG_EXP, explanation)); 


     JSONObject json = jsonParser.makeHttpRequest(url_update_request, 
       "POST", params); 


     try { 
      int success = json.getInt(TAG_SUCCESS); 

      if (success == 1) { 

       Intent i = getIntent(); 
       // send result code 100 to notify about request update 
       setResult(100, i); 
       finish(); 
      } else { 

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

     return null; 
    }

ViewActivity.java

public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.view_request); 

     Intent i = getIntent(); 

     // getting request id (rid) from intent 
     request_id = i.getStringExtra(TAG_ID); 

     // Getting complete request details in background thread 
     new GetRequestDetails().execute(); 

     btnEdit = (Button) findViewById(R.id.btnEdit); 

     btnEdit.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       // Starting new intent 
       Intent in = new Intent(getApplicationContext(), EditActivity.class); 
       // sending rid to next activity 
       in.putExtra(TAG_ID, request_id); 
       startActivity(in); 

      } 
     }); 

    } 

    // Response from Edit Activity 
    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     // if result code 100 
     if (resultCode == 100) { 
      // if result code 100 is received 
      // means user edited/deleted request 
      // reload this screen again 
      Intent intent = getIntent(); 
      finish(); 
      startActivity(intent); 
     } 

    }

来源

2012-08-02 user1466971

很好奇 - 为什么要删除此问题[已更新的数据不会显示在下一个活动屏幕上]（http://stackoverflow.com/questions/11782975/updated-data-doesnt-display-on-next-activity-screen？utm_source = twitterfeed＆utm_medium = twitter） - deja vu .... Oo – t0mm13b 2012-08-02 19:18:10

以为我需要删除它.. ^^ – user1466971 2012-08-02 19:25:27

不用担心那里！ :)只是我看到了关于Android的问题的推文，并认为 - “嗯......这个问题看起来很熟悉”:) – t0mm13b 2012-08-02 20:05:06

您的标题说，这onActivityResult（）不会被调用。

使用startActivityForResult(in, 55)，而不是startActivity(in)

//编辑：顺便说，检查结果代码应该使用RESULT_OK/RESULT_CANCELED常数所做。您可能还会考虑检查请求代码（在我的示例代码中它将是55）

来源

2012-08-02 19:14:00

onActivityResult（）未从Activity中调用

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