等待獲得布爾值爲true

Question

下面這段代碼是一個for循環上的Web服務如何要等到布爾每次循環

檢查代碼

for (i=0;i<contactsString.length-1;i++){ 
     Phone phone=new Phone(); 
     phone.phone=contactsString[i]; 
     check=false; 
     WebService.getInstance().getApi().checkNumber(phone).enqueue(new Callback<MainResponse>() { 

      @Override 
      public void onResponse(Call<MainResponse> call, Response<MainResponse> response) { 

       availableUsers++; 
       check=true; 
      } 

      @Override 
      public void onFailure(Call<MainResponse> call, Throwable t) { 

      } 
     }); 
     //--- here how to wait untill check is true then continue the loop 

    } 

Answer 1

的評論怎麼之前是真實的等待，直到檢查真，則繼續循環

使用遞歸函數

將字段初始化爲availableUsers=0。要啓動循環，請致電checkNumber()

private int availableUsers=0; 

    public void checkNumber() { 
     this.checkNumber(0); 
    } 
    private void checkNumber(final int i){ 
     if(contactsString==null || i>=contactsString.length){ 
      return; 
     } 
     Phone phone=new Phone(); 
     phone.phone=contactsString[i]; 
     WebService.getInstance().getApi().checkNumber(phone).enqueue(new Callback<MainResponse>() { 

      @Override 
      public void onResponse(Call<MainResponse> call, Response<MainResponse> response) { 


       availableUsers++;      
       checkNumber(i+1); 

      } 

      @Override 
      public void onFailure(Call<MainResponse> call, Throwable t) { 
       checkNumber(i+1); 

      } 
     }); 
}