bootstrap之WaitForIdle&&Clear

（上篇文章写完才发现。说好的按顺序可是回头一看全然不是按顺序的）明明WaitForIdle才是第一个。哎，老了，后脑勺不行了。

WaitForIdle

package io.appium.android.bootstrap.handler;

import com.android.uiautomator.core.UiDevice;
import io.appium.android.bootstrap.AndroidCommand;
import io.appium.android.bootstrap.AndroidCommandResult;
import io.appium.android.bootstrap.CommandHandler;
import org.json.JSONException;

import java.util.Hashtable;

/**
* This handler is used to clear elements in the Android UI.
*
* Based on the element Id, clear that element.
*
*/
public class WaitForIdle extends CommandHandler {

/*
* @param command The {@link AndroidCommand}
*
* @return {@link AndroidCommandResult}
*
* @throws JSONException
*
* @see io.appium.android.bootstrap.CommandHandler#execute(io.appium.android.
* bootstrap.AndroidCommand)
*/
@Override
public AndroidCommandResult execute(final AndroidCommand command)
throws JSONException {
final Hashtable<String, Object> params = command.params();
long timeout = 10;
if (params.containsKey("timeout")) {
timeout = (Integer) params.get("timeout");
}

UiDevice d = UiDevice.getInstance();
d.waitForIdle(timeout);
return getSuccessResult(true);
}
}

上面的代码处理过程非常easy。首先都是获取命令里面的參数。然后初始化一个timeout私有变量，假设參数里不含时间。那么就用这个默认的时间。

然后调用uiautomator的UiDevice的对象里方法waitForIdle(),该方法就在timeout时间内界面上没有其它操作，处于空暇状态。这个就是封装了一下UiDevice的waitForIdle方法而已没啥可讲的。

Clear

package io.appium.android.bootstrap.handler;

import com.android.uiautomator.core.UiObjectNotFoundException;
import io.appium.android.bootstrap.*;
import org.json.JSONException;

/**
* This handler is used to clear elements in the Android UI.
*
* Based on the element Id, clear that element.
*
*/
public class Clear extends CommandHandler {

/*
* @param command The {@link AndroidCommand}
*
* @return {@link AndroidCommandResult}
*
* @throws JSONException
*
* @see io.appium.android.bootstrap.CommandHandler#execute(io.appium.android.
* bootstrap.AndroidCommand)
*/
@Override
public AndroidCommandResult execute(final AndroidCommand command)
throws JSONException {
if (command.isElementCommand()) {
try {
final AndroidElement el = command.getElement();
el.clearText();
return getSuccessResult(true);
} catch (final UiObjectNotFoundException e) {
return new AndroidCommandResult(WDStatus.NO_SUCH_ELEMENT,
e.getMessage());
} catch (final Exception e) { // handle NullPointerException
return getErrorResult("Unknown error clearing text");
}
}
return getErrorResult("Unknown error");
}
}

Clear的方法中就看e1.clearText()方法，其它的我在click中都有涉及。

private final UiObject el;
public void clearText() throws UiObjectNotFoundException {
el.clearTextField();
}

实际上调用的是uiautomator中的UiObject.clearTextField()，清楚文本框内的内容。