检测哪个UI edittext被激活

EditText editText1 = findViewById(R.id.editText1);
EditText editText2 = findViewById(R.id.editText2);

editText1.setOnFocusChangeListener(new View.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            // editText1 获得焦点
        } else {
            // editText1 失去焦点
        }
    }
});

editText2.setOnFocusChangeListener(new View.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            // editText2 获得焦点
        } else {
            // editText2 失去焦点
        }
    }
});

EditText editText1 = findViewById(R.id.editText1);
EditText editText2 = findViewById(R.id.editText2);

TextWatcher textWatcher1 = new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

    @Override
    public void afterTextChanged(Editable s) {
        // editText1 文本变化后的处理
    }
};

TextWatcher textWatcher2 = new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

    @Override
    public void afterTextChanged(Editable s) {
        // editText2 文本变化后的处理
    }
};

editText1.addTextChangedListener(textWatcher1);
editText2.addTextChangedListener(textWatcher2);