作品不足EditText.OnFocusChangeListener

Question

在适配器中工作不充分EditText.OnFocusChangeListener 他交替调用hasFocus = true / hasFocus = false 然后应用程序冻结

EditText.OnFocusChangeListener editorActionListener = new TextView.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        final EditText amount = (EditText) v;
        if (hasFocus) {
            if (amount.getText().toString().trim().equals("0") ||
                    amount.getText().toString().trim().equals("0.0")) {
                amount.setText("");
                return;
            }
        } else {
            if (amount.getText().toString().trim().length() == 0) {
                amount.setText("0");
                return;
            }
        }
    }
};

我希望当我将光标放在editText上时，它将变为空 如果它为空，并且我删除了光标，它将变为0