如何从在线数据库kinvey获取数据

我想从一个在线数据库中获取数据并根据今天显示结果使用Textview的简单窗体上的日期。如何从在线数据库kinvey获取数据

请参见下面的代码：

myJavaClient.appData("tdSensorData", Sensor.class).get(new KinveyListCallback<Sensor>() { 

         @Override 
         public void onSuccess(Sensor[] result) { 

         Toast.makeText(MainActivity.this,"Get All Worked!\n Got: " + result.length,Toast.LENGTH_LONG).show(); 


         } 

         @Override 
         public void onFailure(Throwable error) { 
          Toast.makeText(MainActivity.this, 
            "Get All error: " + error.getMessage(), 
            Toast.LENGTH_LONG).show(); 
         } 

        });

问题是，当我试图从实体类数据称为传感器，当我从成功的方法类型result.getSensorr1（）我得到一个错误。任何人都可以请帮助，并从土司result.length我得到4000这是正确的行数我从数据库

这里有我的实体类：

package com.accenture.googleglassaccenture; 

import com.google.api.client.json.GenericJson; 
import com.google.api.client.util.Key; 

public class Sensor extends GenericJson{ 

    @Key("_id") 
    private String id; 

    @Key("DATETIME") 
    private String datetime; 

    @Key("MAC") 
    private String mac; 

    @Key("SENSOR_1") 
    private String sensorr1; 

    @Key("SENSOR_2") 
    private String sensorr2; 

    @Key("SENSOR_3") 
    private String sensorr3; 

    @Key("SENSOR_4") 
    private String sensorr4; 

    @Key("TEMP") 
    private String temp; 

    @Key("BAT") 
    private String bat; 


    public String getId() { 
     return id; 
    } 



    public void setId(String id) { 
     this.id = id; 
    } 



    public String getDatetime() { 
     return datetime; 
    } 



    public void setDatetime(String datetime) { 
     this.datetime = datetime; 
    } 



    public String getMac() { 
     return mac; 
    } 



    public void setMac(String mac) { 
     this.mac = mac; 
    } 



    public String getSensorr1() { 
     return sensorr1; 
    } 



    public void setSensorr1(String sensorr1) { 
     this.sensorr1 = sensorr1; 
    } 



    public String getSensorr2() { 
     return sensorr2; 
    } 



    public void setSensorr2(String sensorr2) { 
     this.sensorr2 = sensorr2; 
    } 



    public String getSensorr3() { 
     return sensorr3; 
    } 



    public void setSensorr3(String sensorr3) { 
     this.sensorr3 = sensorr3; 
    } 



    public String getSensorr4() { 
     return sensorr4; 
    } 



    public void setSensorr4(String sensorr4) { 
     this.sensorr4 = sensorr4; 
    } 



    public String getTemp() { 
     return temp; 
    } 



    public void setTemp(String temp) { 
     this.temp = temp; 
    } 



    public String getBat() { 
     return bat; 
    } 



    public void setBat(String bat) { 
     this.bat = bat; 
    } 


    public Sensor() { 
     // TODO Auto-generated constructor stub 
    } 
}

这里是结果从表看起来像

{"_id":"51a71254d06fdbee04000653","DATETIME":"2013-05-23T11:16:34Z","MAC":"0013a200407e0086","SENSOR_1":"91.19","SENSOR_2":"19.093333333333334","SENSOR_3":"439.3097042968143","SENSOR_4":"0.0","TEMP":"-17","BAT":"47","_acl":{"creator":"kid_VPuam4pfqf"},"_kmd":{"lmt":"2013-05-30T08:48:20.335Z","ect":"2013-05-30T08:48:20.335Z"}},{"_id":"51a71255d06fdbee04000654","DATETIME":"2013-05-23T11:17:33Z","MAC":"0013a200407e0086","SENSOR_1":"91.19","SENSOR_2":"19.093333333333334","SENSOR_3":"494.4776331634671","SENSOR_4":"0.0","TEMP":"-17","BAT":"47","_acl":

来源

2015-04-01 kagiso smith

你得到的结果是以数组的形式。您必须遍历数组并获取实体对象。下面是一个例子：

public void onSuccess(Sensor[] result) { 
if (result.length != 0) { 
    for (Sensor sensor:result){ 
     sensor.getSensorr1(); 
     //what-ever-else-you-need 
    } 
}

来源

2015-07-28 06:03:32

如何从在线数据库kinvey获取数据

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