wildnove wildnove - 1 month ago 10
Android Question

How can I avoid execution of onTextChanged in Android's EditText

How can I avoid that a code line like:

((EditText) findViewById(R.id.MyEditText)).setText("Hello");


Will cause an event here:

((EditText) findViewById(R.id.MyEditText)).addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
// HERE
}

@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}

@Override
public void afterTextChanged(Editable s) {
}
});


I want to know if there is any way to inhibit the execution of onTextChanged as I noticed in the case of selecting a AutoCompleteTextView's dropdown result (no onTextChanged is executed!).

I'm not seeking for workarounds like "if hello do nothing"...

Answer

The Source for AutoCompleteTextView shows that they set a boolean to say the text is being replaced by the block completion

         mBlockCompletion = true;
         replaceText(convertSelectionToString(selectedItem));
         mBlockCompletion = false;    

This is as good a way as any to achieve what you want to do. The TextWatcher then checks to to see if the setText has come via a completion and returns out of the method

 void doBeforeTextChanged() {
     if (mBlockCompletion) return;

Adding and removing the TextWatcher will be more time consuming for the application

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