基本上，我試圖從 Api 回調(diào)響應中獲取一些值，然后將這些值分配給我的一些成員變量，但似乎程序每次都必須運行我的 getPatientRecord() 方法才能進入我的調(diào)用，這是我以前從未遇到過的。日志輸出結(jié)果是： viewPatient: paitient method viewPatient: secondHello worldnullnull 100SN9 - David Hello HMH 1971-08-09這是我的代碼：public class ViewPatientRecord extends AppCompatActivity{TextView tvName, tvGender, tvBirthDate, tvAddress;String pGender, pAddress, pBirthdate;String pName = "Hello world";Patient myPatient;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.view_patient_record);    tvName = findViewById(R.id.tvFullName);    tvGender = findViewById(R.id.tvGender);    tvBirthDate = findViewById(R.id.tvDb);    tvAddress = findViewById(R.id.tvAddress);    myPatient= new Patient();    try {        getPatientRecord();    } catch (InterruptedException e) {        e.printStackTrace();    }}private void getPatientRecord() throws InterruptedException {    SharedPreferences myPre = getSharedPreferences("PatientRecord", MODE_PRIVATE);    if(myPre.getString("uuid",null)!=null){        retrievePatientByUuid(myPre.getString("uuid",null));        Log.d("viewPatient", "second"+pName+pGender+pBirthdate);        tvName.setText(pName);        tvGender.setText(pGender);        tvBirthDate.setText(pBirthdate);        tvAddress.setText(pAddress);    }else{        Toast.makeText(ViewPatientRecord.this, "Something went wrong, please contact the administrator for help!", Toast.LENGTH_SHORT).show();    }}