appium三种等待元素的方法
学过selenium的都知道，一般等待元素加载有三种办法:（1）sleep 强制等待。示例：Thread.sleep（60000）
（2）implicitlyWait 隐式等待。全局等待30s不管元素是否已经加载
示例：driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
（3）WebDriverWait 显示等待，这个需要增加一定等待时间，显示等待时间可以通过WebDriverWait 和util来决定,比如这个timeOut是60，如果该元素60s以内出现就不在等待
WebDriverWait wait = new WebDriverWait(driver, 60);
WebElement e= wait.until(newExpectedCondition<WebElement>() {
@Override
public WebElement apply(WebDriver d) {
return d.findElement(By.id("q"));
}
})以上三种方法中，只用WebDriverWait是selenium所特有，在java-client中也找不到相应的，如果想使用这种方法怎么办？改造轮子，首先添加AndroidDriverWait.java, 其实是将WebDriverWait的类型改成AndroidDriverWait具体代码如下：import org.openqa.selenium.NotFoundException;
import org.openqa.selenium.TimeoutException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebDriverException;
import org.openqa.selenium.remote.RemoteWebDriver;
import org.openqa.selenium.support.ui.Clock;
import org.openqa.selenium.support.ui.FluentWait;
import org.openqa.selenium.support.ui.Sleeper;
import org.openqa.selenium.support.ui.SystemClock;
import io.appium.java_client.android.AndroidDriver;
import java.util.concurrent.TimeUnit;
/**
* A specialization of {@link FluentWait} that uses WebDriver instances.
*/
public class AndroidDriverWait extends FluentWait<AndroidDriver> {
public final static long DEFAULT_SLEEP_TIMEOUT = 500;
private final WebDriver driver;
/**
* Wait will ignore instances of NotFoundException that are encountered (thrown) by default in
* the 'until' condition, and immediately propagate all others.You can add more to the ignore
* list by calling ignoring(exceptions to add).
*
* @param driver The WebDriver instance to pass to the expected conditions
* @param timeOutInSeconds The timeout in seconds when an expectation is called
* @see AndroidDriverWait#ignoring(java.lang.Class)
*/
public AndroidDriverWait(AndroidDriver driver, long timeOutInSeconds) {
this(driver, new SystemClock(), Sleeper.SYSTEM_SLEEPER, timeOutInSeconds, DEFAULT_SLEEP_TIMEOUT);
}
/**
* Wait will ignore instances of NotFoundException that are encountered (thrown) by default in
* the 'until' condition, and immediately propagate all others.You can add more to the ignore
* list by calling ignoring(exceptions to add).
*
* @param driver The WebDriver instance to pass to the expected conditions
* @param timeOutInSeconds The timeout in seconds when an expectation is called
* @param sleepInMillis The duration in milliseconds to sleep between polls.
* @see AndroidDriverWait#ignoring(java.lang.Class)
*/
public AndroidDriverWait(AndroidDriver driver, long timeOutInSeconds, long sleepInMillis) {
this(driver, new SystemClock(), Sleeper.SYSTEM_SLEEPER, timeOutInSeconds, sleepInMillis);
}
/**
* @param driver The WebDriver instance to pass to the expected conditions
* @param clock The clock to use when measuring the timeout
* @param sleeper Object used to make the current thread go to sleep.
* @param timeOutInSeconds The timeout in seconds when an expectation is
* @param sleepTimeOut The timeout used whilst sleeping. Defaults to 500ms called.
*/
public AndroidDriverWait(AndroidDriver driver, Clock clock, Sleeper sleeper, long timeOutInSeconds,
long sleepTimeOut) {
super(driver, clock, sleeper);
withTimeout(timeOutInSeconds, TimeUnit.SECONDS);
pollingEvery(sleepTimeOut, TimeUnit.MILLISECONDS);
ignoring(NotFoundException.class);
this.driver = driver;
}
@Override
protected RuntimeException timeoutException(String message, Throwable lastException) {
TimeoutException ex = new TimeoutException(message, lastException);
ex.addInfo(WebDriverException.DRIVER_INFO, driver.getClass().getName());
if (driver instanceof RemoteWebDriver) {
RemoteWebDriver remote = (RemoteWebDriver) driver;
if (remote.getSessionId() != null) {
ex.addInfo(WebDriverException.SESSION_ID, remote.getSessionId().toString());
}
if (remote.getCapabilities() != null) {
ex.addInfo("Capabilities", remote.getCapabilities().toString());
}
}
throw ex;
}
}接着需要修改接口：ExpectedCondition，将其WebDriver的类型替换为AndroidDriver具体代码：public interface ExpectedCondition<T> extends Function<AndroidDriver, T> {}经过修改之后，就可以在appium中直接使用： //wait for 60s if WebElemnt show up less than 60s , then return , until 60s
WebElement showClose = new AndroidDriverWait(driver, 60)
.until(new ExpectedCondition<WebElement>() {
public WebElement apply(AndroidDriver d) {
return d.findElement(By
.id("com.zhihu.android:id/showcase_close"));
}
});
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