无法调用 "io.appium.java_client.android.AndroidDriver.manage()"，因为 "this.driver" 为空

Question

我是 Appium 的新手，刚开始，我想通过创建一个对象来调用其他 classes 的方法。但是当我调用方法时，它显示“this.driver”为空。如何通过创建对象调用其他 class 的方法？可能吗？？注意：我已经使用了'extends class'，所以我没有在多个class中使用它。

//Here, I call methods from other classes......
 import java.net.MalformedURLException;
 import java.time.Duration;
 import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.Dimension;
//import org.openqa.selenium.NoSuchElementException;
import org.openqa.selenium.Point;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.interactions.touch.TouchActions;
import org.testng.annotations.Test;

import io.appium.java_client.android.AndroidDriver;
import io.appium.java_client.android.AndroidElement;
import io.appium.java_client.android.nativekey.AndroidKey;
import io.appium.java_client.android.nativekey.KeyEvent;
import io.appium.java_client.MobileBy;
import io.appium.java_client.MobileElement;
import io.appium.java_client.TouchAction;
import static io.appium.java_client.touch.LongPressOptions.longPressOptions;
import static java.time.Duration.ofSeconds;

import io.appium.java_client.touch.LongPressOptions;
import io.appium.java_client.touch.WaitOptions;
import io.appium.java_client.touch.offset.PointOption;

@Test(priority = 11)
public void IncompleteTask() {

    
    String ser="Update For Testing";
    Searching(ser);
    AllMethods scr=new AllMethods(driver);
    scr.Scroll();
    //Scroll();
    Point point1=driver.findElementByXPath("//android.widget.TextView[@text='Update For Testing']").getCenter();
    Point point2=driver.findElementByXPath("//android.widget.TextView[@text='Update For Testing']").getLocation();                  
    Swipping(point1,point2);
    
    driver.findElementById("bd.com.cslsoft.kandareeliteapp:id/ll_reAssign").click();
    //driver.findElementById("bd.com.cslsoft.kandareeliteapp:id/noButton").click();
    String mass=driver.findElementById("bd.com.cslsoft.kandareeliteapp:id/tvMessage").getText();
    driver.findElementById("bd.com.cslsoft.kandareeliteapp:id/yesButton").click();
    
    String mText="Are you sure you want to undo this Task?";
    if(mass.contains(mText))
    {
        driver.findElementById("bd.com.cslsoft.kandareeliteapp:id/yesButton").click();
            
    }

    System.out.println("IncompleteTask Executed!");
    driver.quit();

}

//这是我的allMethods class

import java.time.Duration;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.Dimension;
import org.openqa.selenium.support.PageFactory;

import io.appium.java_client.TouchAction;
import io.appium.java_client.android.AndroidDriver;
import io.appium.java_client.android.AndroidElement;
import io.appium.java_client.touch.WaitOptions;
import io.appium.java_client.touch.offset.PointOption;

import java.io.IOException;
import java.lang.NullPointerException;
public class AllMethods  {
   public AndroidDriver<AndroidElement>  driver;
   public AllMethods(AndroidDriver driver)
   {
    PageFactory.initElements(driver, this);
   }

   public void searching(String ser) {
       driver.findElementById("bd.com.cslsoft.kandareeliteapp:id/ll_search").click(); 
       driver.findElementById("android:id/search_src_text").sendKeys(ser);  
       driver.hideKeyboard();
       driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

}

public void Scroll() throws NullPointerException
{
    for(int i=0; i<3; i++)
    {
        
        Dimension dimension=driver.manage().window().getSize();
        int start_x=(int) (dimension.width*0.5);
        int start_y=(int) (dimension.height*0.2);
        
        int end_x=(int) (dimension.width*0.5);
        int end_y=(int) (dimension.height*0.8);
        
        TouchAction tcD=new TouchAction(driver);
        tcD.press(PointOption.point(start_x, 
          start_y)).waitAction(WaitOptions.waitOptions(Duration.ofSeconds(2)))
        .moveTo(PointOption.point(end_x, end_y)).release().perform();
    }

  }
 }

Answer 1

AllMethodsclass中的方法是指尚未初始化的驱动程序。即他们指的是这个驱动程序： public AndroidDriver<AndroidElement> driver;

您需要在 AllMethods 构造函数中添加 this.driver=driver，这将使用在构造函数中传递的驱动程序的引用来设置驱动程序。

无法调用 "io.appium.java_client.android.AndroidDriver.manage()"，因为 "this.driver" 为空

Cannot invoke "io.appium.java_client.android.AndroidDriver.manage()" because "this.driver" is null

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