Java Android 从回调线程修改成员变量

Question

基本上，我试图从 Api 回调响应中获取一些值，然后将这些值分配给我的一些成员变量，但似乎程序每次都必须运行我的 getPatientRecord() 方法才能进入我的调用，这是我以前从未遇到过的。日志输出结果是： viewPatient: paitient method viewPatient: secondHello worldnullnull 100SN9 - David Hello HMH 1971-08-09这是我的代码：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();    }}

Answer 1

我看不出问题。调用在retrievePatientByUuid其中由调用完成getPatientRecord。所以是的，你必须通过getPatientRecord。调用是异步的。您应该在回调中设置 TextViews ：

    tvName.setText(pName);

    tvGender.setText(pGender);

    tvBirthDate.setText(pBirthdate);

    tvAddress.setText(pAddress);