Android onFocusChange is fired multiple times

Question

I'm using a List Adapter (extends SimpleCursorAdapter) to populate some data.

I'm calling View.SetOnFocusChangeListener in bindView where i attach the listener to the desired EditText. The problem is that the event is fired 4 times where in the end the EditText loses it's focus, until i click again where the event is fired 3 times and the EditText retains focus.

I think it should only be called once. Is the OnTouch event responsible for this?

Here is my code:

@Override
public void bindView(View view, Context context, Cursor cursor) {       
    view.setId(cursor.getPosition());//Setting the row id to the corresponding cursor row id for easier data manipulation
    super.bindView(view, context, cursor);
    EditText etItemQuantity = (EditText)view.findViewById(R.id.etItemQuantity);
    if(!isNumeric(etItemQuantity.getText().toString())) {
        etItemQuantity.setFocusable(false);
        etItemQuantity.setFocusableInTouchMode(false);
        etItemQuantity.setClickable(false);
    } else {
        etItemQuantity.setFocusable(true);
        etItemQuantity.setFocusableInTouchMode(true);
        etItemQuantity.setClickable(true);
        etItemQuantity.setOnFocusChangeListener(ofcl);
        etItemQuantity.setOnEditorActionListener(oeal);
    }

}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
    View view = inflater.inflate(layout, null);
    return view;
}

View.OnFocusChangeListener ofcl = new View.OnFocusChangeListener() {

    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (!(v instanceof EditText)) {                     
            return;
        }
        EditText tableEt = (EditText)v;

        if(hasFocus) {
            tableEt.setTag(tableEt.getText().toString());
            tableEt.setText("");
        } else {
            if(tableEt.getText().toString().equals("")) {           
                tableEt.setText(tableEt.getTag().toString());
                tableEt.setTag(null);
            }
        }


    }
};

I also have this problem, it is also occured in an adapter. Probably it is because of the fact that Android (in my case Lollipop) runs over all EditText's within ListView or ScrollView. — CoolMind, Dec 14 '16 at 15:02

CoolMind · Answer 1 · 2021-08-27T12:52:33.960

In my case I had onFocusChange fired twice in API 24.

editText.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
    // ... hasFocus
}

container.setOnTouchListener { v, _ ->
    editText.clearFocus()
    hideKeyboard(editText)
    v.performClick()
    return@setOnTouchListener false
}

I wanted to remove focus from EditText when a user clicks outside of the EditText. But in API 24 editText.clearFocus() fired onFocusChange twice. To set similar behaviour in API 24 and API 30 I added these lines to XML:

<androidx.constraintlayout.widget.ConstraintLayout
    android:id="@+id/container"
    ....
    android:focusableInTouchMode="true"
    android:focusable="true">

    <EditText ... />

Instead of XML you can change the code so, but in API 30 there may be new problems:

editText.clearFocus()
hideKeyboard(editText)
v.performClick()
v.requestFocus() // 1.
v.requestFocusFromTouch() // 2.
return@setOnTouchListener false

I added the `android:focusableInTouchMode="true" android:focusable="true"` to my XML and it worked. But why? Why does allowing the root/parent layout to be focusable resolve this problem? — Daniel, Aug 11 '23 at 09:11
@Daniel, good question. I don't know. Probably two links in my answer can help, but I didn't find an answer there. — CoolMind, Aug 11 '23 at 11:01

score 0 · Accepted Answer · answered May 21 '14 at 09:09

0

Adding the following line int my activity in the manifest fixed the problem:

        android:windowSoftInputMode="adjustPan"

Not sure why though.

answered May 21 '14 at 09:09

Mitsosp

399
3
17

1

I guess it is because this flag probably prevents the layout from being fired again, which would result in the editor losing focus and regaining focus. – Amir Uval Nov 17 '14 at 16:11

Android onFocusChange is fired multiple times

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