EditText密码输入错误后重新获取焦点并自动弹出软键盘

public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private EditText etPassword;    @Override    protected void onCreate(Bundle savedInstanceState) {        ...        etPassword = (EditText) findViewById(R.id.etPassword);        ...            //密码错误时的业务            etPassword.setText("");//重置编辑框为空            //让输入框重新获取焦点            etPassword.setFocusable(true);            etPassword.setFocusableInTouchMode(true);            etPassword.requestFocus();            //通过调用输入管理器来自动弹出软键盘            InputMethodManager inputMethodManager = (InputMethodManager) etPassword.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);            inputMethodManager.showSoftInput(etPassword, 0);        ...    }}