如何修复此android错误？

这是我得到的错误：

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        if(isok){
            progressDialog.dismiss();
            Intent NextP = new Intent(RegisterEasyActivity.this,ActivityOTP.class);
            startActivity(NextP);
        }
        else{
            progressDialog.dismiss();
            switch (errorcode){
                case 1:
                    progressDialog.dismiss();
                    Toast.makeText(RegisterEasyActivity.this, "Number already registered", Toast.LENGTH_SHORT).show();
                    break;
                case 2:
                    progressDialog.dismiss();
                    Toast.makeText(RegisterEasyActivity.this, "Username already exist!", Toast.LENGTH_SHORT).show();
                    break;
                default:
                    progressDialog.dismiss();
                    Toast.makeText(getBaseContext(), "Something wrong", Toast.LENGTH_SHORT).show();
            }
        }
    }
});

java.lang.RuntimeException:无法在未调用Looper.prepare（）的线程内创建处理程序
android.os.Handler.（Handler.java:200）
位于android.os.Handler.（Handler.java:114）
在android.widget.Toast$TN$2。（Toast.java:336）
在android.widget.Toast$TN.（Toast.java:336）
在android.widget.Toast.（Toast.java:103）
位于android.widget.Toast.makeText（Toast.java:256）
在com.create.owner.mydemopro.Activity.RegisterEasyActivity$3$2.run上（RegisterEasyActivity.java:231）
运行（Thread.java:761）

---

我想不出这个问题。

您正在从工作线程调用它。请尝试此代码

java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
                                                                            at android.os.Handler.<init>(Handler.java:200)
                                                                            at android.os.Handler.<init>(Handler.java:114)
                                                                            at android.widget.Toast$TN$2.<init>(Toast.java:336)
                                                                            at android.widget.Toast$TN.<init>(Toast.java:336)
                                                                            at android.widget.Toast.<init>(Toast.java:103)
                                                                            at android.widget.Toast.makeText(Toast.java:256)
                                                                            at com.create.owner.mydemopro.Activity.RegisterEasyActivity$3$2.run(RegisterEasyActivity.java:231)
                                                                            at java.lang.Thread.run(Thread.java:761)

---

扩展活套类可能重复

  new Handler(Looper.getMainLooper()).post(new Runnable() {
                @Override
                public void run() {
                   if(isok){
                              progressDialog.dismiss();
                              Intent NextP = new Intent(RegisterEasyActivity.this,ActivityOTP.class);
                              startActivity(NextP);
                             }
                    else{
                           progressDialog.dismiss();
                           switch (errorcode){
                                  case 1:
                                        progressDialog.dismiss();
                                        Toast.makeText(RegisterEasyActivity.this, "Number already registered", Toast.LENGTH_SHORT).show();
                                        break;
                                        case 2:
                                        progressDialog.dismiss();
                                        Toast.makeText(RegisterEasyActivity.this, "Username already exist!", Toast.LENGTH_SHORT).show();
                                         break;
                                         default:
                                         progressDialog.dismiss();
                                         Toast.makeText(getBaseContext(), "Something wrong", Toast.LENGTH_SHORT).show();
                                            }
                                        }
                                    }
                }
            });