1. 问题描述和起因

在使用Appium1.7.0及其以下版本的时候，我们可以直接使用如下代码来创建一个AppiumDriver实例进行对安卓设备的操作。

driver = new AndroidDriver(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);

但在把Appium包升级到当前最新的2.0.0版本的时候，这段代码会引发如下的一问题

当前的pom.xml相关设置如下:记得把1.7.0改成2.0.0或者是将来更高级版本

<dependency>
  <groupId>io.appium</groupId>
  <artifactId>java-client</artifactId>
  <version>2.0.0</version>
  <del><version>1.7.0</version></del>
</dependency>

2.问题分析

究其原因，发现Appium2.0.0把AppiumDriver这个类改成了抽象函数，所以到导致了这个问题

public <span style="color:#ff0000;">abstract </span>class AppiumDriver extends RemoteWebDriver implements MobileDriver,
        ContextAware, Rotatable, FindsByAccessibilityId, LocationContext,
        DeviceActionShortcuts, TouchShortcuts, InteractsWithFiles,
        InteractsWithApps, ScrollsTo {

    private final static ErrorHandler errorHandler = new ErrorHandler(
            new ErrorCodesMobile(), true);
    private URL remoteAddress;
    private RemoteLocationContext locationContext;
    private ExecuteMethod executeMethod;

    // frequently used command parameters
    protected final String KEY_CODE = "keycode";
    protected final String PATH = "path";
    private final String SETTINGS = "settings";

3.问题解决

根据问题分析，把代码修改如下，使用AndroidDriver而非原来的AppiumDriver。

public class NoetPadTest {
    /**
     * Create the test case
     *
     * @param testName name of the test case
     */
    private AndroidDriver driver;

    @Before
    public void setUp() throws Exception {
        // set up appium
        File classpathRoot = new File(System.getProperty("user.dir"));
        File appDir = new File(classpathRoot, "apps");
        File app = new File(appDir, "NotePad.apk");
        DesiredCapabilities capabilities = new DesiredCapabilities();
        capabilities.setCapability("deviceName","Android");
        //capabilities.setCapability("platformVersion", "4.2");
        capabilities.setCapability("platformName", "Android");
        //capabilities.setCapability("app", app.getAbsolutePath());
        capabilities.setCapability("appPackage", "com.example.android.notepad");
        capabilities.setCapability("appActivity", "com.example.android.notepad.NotesList");
        //capabilities.setCapability("appActivity", ".NotesList");
        driver = new AndroidDriver(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
    } 

    @After
    public void tearDown() throws Exception {
        driver.quit();
    }