PasswordPreference.java 文件源码

private CheckBox makePasswordCheckbox(View view) {
    final EditText editText = getEditText();

    CheckBox checkBox = new CheckBox(view.getContext());
    checkBox.setText(R.string.checkbox_show_password);
    checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked) {
                editText.setTransformationMethod(null);
            }
            else {
                editText.setTransformationMethod(new PasswordTransformationMethod());
            }
        }
    });
    return checkBox;
}