开发酒店审计APP时，使用EditText的getTag()返回null问题求助

Hey there! Let's work through that getTag() returning null issue with your dynamically created EditTexts. Here are the most common fixes and checks to resolve this:

• First, confirm you're actually setting the tag on your EditText
  This is the #1 reason getTag() returns null—if you never called setTag(), there's nothing to retrieve! When you dynamically create your EditText in the loop, make sure to assign a tag right after initializing it. For example:

  // Inside your loop creating TableRows/EditTexts
  EditText answerEt = new EditText(getActivity());
  // Set tag with the relevant question data or index
  answerEt.setTag(questionList.get(i));
  // Or use an index if that's more useful: answerEt.setTag(i);
  row.addView(answerEt);
  

• Check if the tag is being overwritten or lost
  Sometimes subsequent code (like view binding libraries, layout updates, or view recycling) can overwrite or clear the tag. If you're using a RecyclerView or similar view container, ensure you re-set the tag every time the view is bound/recycled—don't rely on cached tag values.

• Verify you're calling getTag() on the correct EditText instance
  It's easy to accidentally reference a different EditText than the one you tagged. Add a quick log to confirm the object identity:

  EditText targetEt = (EditText) findViewById(yourEtId);
  Log.d("TAG_DEBUG", "Target EditText hash: " + targetEt.hashCode());
  // Compare this hash with the one from the EditText you created dynamically
  

  If the hashes don't match, you're calling getTag() on the wrong view.

• Double-check layout inflation timing (if using inflated layouts)
  If you're using LayoutInflater to load pre-made layouts with EditTexts, make sure you set the tag after inflating and finding the EditText in the layout. For example:

  View rowView = LayoutInflater.from(getActivity()).inflate(R.layout.audit_question_row, row, false);
  EditText answerEt = rowView.findViewById(R.id.et_audit_answer);
  // Set tag after retrieving the EditText from the inflated view
  answerEt.setTag(questionList.get(i));
  row.addView(rowView);
  

• Use keyed tags to avoid conflicts
  If you need multiple tags on the same EditText, use the setTag(int key, Object tag) overload to prevent clashes with system or library tags. Define a unique key (like a constant) and use it to set/get the tag:

  // Define a constant key (put this in a constants class or your activity)
  private static final int TAG_AUDIT_QUESTION = 1001;
  
  // Set the keyed tag
  answerEt.setTag(TAG_AUDIT_QUESTION, questionList.get(i));
  
  // Retrieve the tag using the same key
  Question currentQuestion = (Question) answerEt.getTag(TAG_AUDIT_QUESTION);
  

内容的提问来源于stack exchange，提问作者user7735493