未能传递结果 ResultInfo

本文介绍了未能传递结果 ResultInfo的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

有很多人在stackoverflow上遇到过同样的错误，但是我在那些帖子中找不到任何相关的解决方案.我的 MainActivity 正在使用 startActivityForResult() 开始一个新活动 (SecondActivity)；SecondActivity 然后用 onBackPressed() 返回一些数据；和 putExtra();

There are many people who have encountered the same error on stackoverflow, but I haven't been able to find any relevant resolution in those posts. My MainActivity is starting a new activity (SecondActivity) with startActivityForResult(); SecondActivity then returns some data with onBackPressed(); and putExtra();

从 MainActivity.java 中提取:

Extract from MainActivity.java:

public void addNewNote(View v){

    Intent intent = new Intent(this, SecondActivity.class);
    intent.putExtra("Source", "NEW");
    startActivityForResult(intent, 1); //1 is the result code

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    Log.v("TAG", data.getStringExtra("Note"));
      if (requestCode == 1) {

         if(resultCode == RESULT_OK){
             listItems.add(data.getStringExtra("Note"));
             Log.v("TAG", data.getStringExtra("Note"));
             adapter.notifyDataSetChanged();
             listView.invalidateViews();
         }
         if (resultCode == RESULT_CANCELED) {

         }
      }

}

从 SecondActivity.java 中提取:

Extract from SecondActivity.java:

@Override
public void onBackPressed() {

    super.onBackPressed();
    if (mainTextField.getText() != null){
        Intent returnIntent = new Intent();
        returnIntent.putExtra("Note",mainTextField.getText());
        setResult(RESULT_OK, returnIntent);
        finish();
    } else {
        Intent returnIntent = new Intent();
        setResult(RESULT_CANCELED, returnIntent);
        finish();
    }

}

Logcat:

推荐答案

试试这个-

protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
      if (requestCode == 1 && data != null)
      {
         Log.v("TAG", data.getStringExtra("Note"));
         if(resultCode == RESULT_OK)
         {
             listItems.add(data.getStringExtra("Note"));
             Log.v("TAG", data.getStringExtra("Note"));
             adapter.notifyDataSetChanged();
             listView.invalidateViews();
         }
         if (resultCode == RESULT_CANCELED)
         {

         }
      }
}

这篇关于未能传递结果 ResultInfo的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

resultInfo