小编Sur*_*ine的帖子

FirstActivity.Java有一个FragmentA.Java电话startActivityForResult(). SecondActivity.Java打电话,finish()但onActivityResult永远不会被写入FragmentA.Java.

FragmentA.Java 码:

  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    // some code
    Intent i = new Intent(getActivity(), SecondActivity.class);
    i.putExtra("helloString", helloString);
    getActivity().startActivityForResult(i, 1);
  }

  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    getActivity();
    if(requestCode == 1 && resultCode == Activity.RESULT_OK) {
       //some code
    }
  }

SecondActivity.Java 码:

  @Override
  protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       //some code
       Intent returnIntent = new Intent();
       returnIntent.putExtra("result", …

如何在形状中添加背景图像？我在下面尝试的代码但没有成功:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" android:padding="10dp">
//here is where i need to set the image
<solid android:color="@drawable/button_image"/>
    <corners
     android:bottomRightRadius="5dp"
     android:bottomLeftRadius="5dp"
     android:topLeftRadius="5dp"
     android:topRightRadius="5dp"/>
 </shape>

我有一个这样的表格:

class My_Form(ModelForm):
    class Meta:
        model = My_Class
        fields = ('first_name', 'last_name' , 'address')

如何将地址字段设为可选？

var Box = function(){
    this.parm = {name:"rajakvk",year:2010};
    Box.prototype.jspCall = function() {
        $.ajax({
            type: "post",
            url: "some url",
            success: this.exeSuccess,
            error: this.exeError,
            complete: this.exeComplete
        });
    }
    this.exeSuccess = function(){
        alert(this.parm.name);
    }
}

我没有在exeSuccess方法中获取Box对象.如何在exeSuccess方法中传递Box对象？

我正在开发一个需要用户选择日期的应用程序(dd/mm/yyyy).我想在按钮单击时显示一个带有DatePicker的对话框.一旦选择了日期,它必须在EditText中显示.

我正在使用Android Studio 2.2,min sdk的项目是23.

请帮我做所需的代码.

在Python中,如果类的某些方法需要辅助函数,但是辅助函数本身不使用类中的任何东西,我应该将辅助函数放在类的内部还是外部？

我试过把它放在里面,但是PyLint抱怨说这个功能可以放在外面.

@Karl:

该类是软件升级程序,如果该文件夹尚不存在,则辅助函数会创建一个新文件夹.这个类在一个模块中,现在几乎只有类的代码.其他课程可能会在以后添加.

我的确意味着身份平等.

例如,以下内容是否始终打印为真？

System.out.println("foo".getClass() == "fum".getClass());

如何将数组转换为CSV文件？

这是我的阵列:

stdClass Object
(

    [OrderList_RetrieveByContactResult] => stdClass Object
        (
            [OrderDetails] => stdClass Object
                (
                    [entityId] => 1025298
                    [orderId] => 10952
                    [orderName] => testing
                    [statusTypeId] => 4652
                    [countryCode] => AU
                    [orderType] => 1
                    [invoiceNumber] => 0
                    [invoiceDate] => 0001-01-01T00:00:00
                    [userID_AssignedTo] => 11711
                    [shippingAmount] => 8.95
                    [shippingTaxRate] => 0
                    [shippingAttention] => 
                    [shippingInstructions] => 
                    [shippingOptionId] => 50161
                    [discountCodeId] => 0
                    [discountRate] => 0
                    [totalOrderAmount] => 408.45
                    [directDebitTypeId] => 0
                    [directDebitDays] => 0
                    [isRecur] => 
                    [nextInvoiceDate] => 0001-01-01T00:00:00
                    [endRecurDate] => 0001-01-01T00:00:00
                    [cycleTypeID] => …

遇到一个问题,我的JSON数据被打印为科学记数而不是浮点数.

import urllib2
import json
import sys

url = 'https://bittrex.com/api/v1.1/public/getmarketsummary?market=btc-quid'
json_obj = urllib2.urlopen(url)
QUID_data = json.load(json_obj)

QUID_MarketName_Trex = QUID_data["result"][0]["MarketName"][4:9]
QUID_Last_Trex = QUID_data["result"][0]["Last"]
QUID_High_Trex = QUID_data["result"][0]["High"]
QUID_Low_Trex = QUID_data["result"][0]["Low"]
QUID_Volume_Trex = QUID_data["result"][0]["Volume"]
QUID_BaseVolume_Trex = QUID_data["result"][0]["BaseVolume"]
QUID_TimeStamp_Trex = QUID_data["result"][0]["TimeStamp"]
QUID_Bid_Trex = QUID_data["result"][0]["Bid"]
QUID_Ask_Trex = QUID_data["result"][0]["Ask"]
QUID_OpenBuyOrders_Trex = QUID_data["result"][0]["OpenBuyOrders"]
QUID_OpenSellOrders_Trex = QUID_data["result"][0]["OpenSellOrders"]
QUID_PrevDay_Trex = QUID_data["result"][0]["PrevDay"]
QUID_Created_Trex = QUID_data["result"][0]["Created"]
QUID_Change_Trex = ((QUID_Last_Trex - QUID_PrevDay_Trex)/ QUID_PrevDay_Trex)*100
QUID_Change_Var = str(QUID_Change_Trex)
QUID_Change_Final = QUID_Change_Var[0:5] + '%'

print QUID_Last_Trex   

它打印以下值; 1.357e-05.我需要这个是一个小数点后面有8个字符的浮点数(0.00001370)

正如你在这里看到的 - > http://i.imgur.com/FCVM1UN.jpg,我的GUI显示第一行正确(使用完全相同的代码).

如何将datetime价值转换为yyyymmddhhmmss？

例如From 2014-04-17 13:55:12

至 20140417135512