Swipe
我定义为滑动，但它字面的意思又不是，事件的形式类似于小时候拿着一块石头片，朝水面飞过去，假设你手法能够那么就是swipe走的路线，假设你手法不行，接触水面的时候就没再飞起来那就会被人嘲笑的。
package io.appium.android.bootstrap.handler;
import com.android.uiautomator.core.UiDevice;
import com.android.uiautomator.core.UiObjectNotFoundException;
import io.appium.android.bootstrap.*;
import io.appium.android.bootstrap.exceptions.InvalidCoordinatesException;
import io.appium.android.bootstrap.utils.Point;
import org.json.JSONException;
import java.util.Hashtable;
/**
* This handler is used to swipe.
*
*/
public class Swipe extends CommandHandler {
/*
* @param command The {@link AndroidCommand} used for this handler.
*
* @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();
final Point start = new Point(params.get("startX"), params.get("startY"));
final Point end = new Point(params.get("endX"), params.get("endY"));
final Integer steps = (Integer) params.get("steps");
final UiDevice device = UiDevice.getInstance();
Point absStartPos = new Point();
Point absEndPos = new Point();
if (command.isElementCommand()) {
try {
final AndroidElement el = command.getElement();
absStartPos = el.getAbsolutePosition(start);
absEndPos = el.getAbsolutePosition(end, false);
} catch (final UiObjectNotFoundException e) {
return getErrorResult(e.getMessage());
} catch (final InvalidCoordinatesException e) {
return getErrorResult(e.getMessage());
} catch (final Exception e) { // handle NullPointerException
return getErrorResult("Unknown error");
}
} else {
try {
absStartPos = getDeviceAbsPos(start);
absEndPos = getDeviceAbsPos(end);
} catch (final InvalidCoordinatesException e) {
return getErrorResult(e.getMessage());
}
}
Logger.debug("Swiping from " + absStartPos.toString() + " to "
+ absEndPos.toString() + " with steps: " + steps.toString());
final boolean rv = device.swipe(absStartPos.x.intValue(),
absStartPos.y.intValue(), absEndPos.x.intValue(),
absEndPos.y.intValue(), steps);
if (!rv) {
return getErrorResult("The swipe did not complete successfully");
}
return getSuccessResult(rv);
}
}
无论它怎样定义，先分析源代码最后再定义。
final Hashtable<String, Object> params = command.params();
final Point start = new Point(params.get("startX"), params.get("startY"));
final Point end = new Point(params.get("endX"), params.get("endY"));
final Integer steps = (Integer) params.get("steps");
final UiDevice device = UiDevice.getInstance();
Point absStartPos = new Point();
Point absEndPos = new Point();
首先从命令里取得參数，然后解析出所须要的3个变量：起始点start、终点end、步骤steps。然后获得设备对象，定义2个私有Point对象,以备后用。
然后分条件处理，处理控件还是处理坐标。
控件
final AndroidElement el = command.getElement();
absStartPos = el.getAbsolutePosition(start);
absEndPos = el.getAbsolutePosition(end, false);首先获取控件对象，再通过getAbsolutePosition传入不同的參数获得在该控件上点击的起始点和结束点。
public Point getAbsolutePosition(final Point point,
final boolean boundsChecking) throws UiObjectNotFoundException,
InvalidCoordinatesException {
final Rect rect = el.getBounds();
final Point pos = new Point();
Logger.debug("Element bounds: " + rect.toShortString());
if (point.x == 0) {
pos.x = rect.width() * 0.5 + rect.left;
} else if (point.x <= 1) {
pos.x = rect.width() * point.x + rect.left;
} else {
pos.x = rect.left + point.x;
}
if (boundsChecking) {
if (pos.x > rect.right || pos.x < rect.left) {
throw new InvalidCoordinatesException("X coordinate ("
+ pos.x.toString() + " is outside of element rect: "
+ rect.toShortString());
}
}
if (point.y == 0) {
pos.y = rect.height() * 0.5 + rect.top;
} else if (point.y <= 1) {
pos.y = rect.height() * point.y + rect.top;
} else {
pos.y = rect.left + point.y;
}
if (boundsChecking) {
if (pos.y > rect.bottom || pos.y < rect.top) {
throw new InvalidCoordinatesException("Y coordinate ("
+ pos.y.toString() + " is outside of element rect: "
+ rect.toShortString());
}
}
return pos;
}上面的一大段代码,看起来非常复杂，事实上非常easy，业务非常容易理解，处理这样的点的时候就须要推断非常多东西。上面的代码首先分析x坐标然后分析y坐标。x和y坐标的推断和处理时一样的，所以我仅仅讲一下x坐标。
首先推断x坐标是否为0，假设为0，定义初始点的x坐标为控件的中心点的横坐标。假设x的坐标小于1，说明坐标为相对坐标，用百分比来求值，此时就要与宽度做乘积运算得到详细值。假设上面2种情况都不符合，那就是详细坐标值，那就直接元素的x坐标值加上控件的边框左坐标值。最后依据传入的boolean值来推断是否做一个超出边界的验证。假设超出边界就跑出异常。y坐标的获取方式类似。最后得到坐标值并返回，回到execute方法中。
坐标
absStartPos = getDeviceAbsPos(start);
absEndPos = getDeviceAbsPos(end);通过调用getDeviceAbsPos()方法得到坐标值来初始化之前声明的私有Point对象.
protected static Point getDeviceAbsPos(final Point point)
throws InvalidCoordinatesException {
final UiDevice d = UiDevice.getInstance();
final Point retPos = new Point(point); // copy inputed point
final Double width = (double) d.getDisplayWidth();
if (point.x < 1) {
retPos.x = width * point.x;
}
if (retPos.x > width || retPos.x < 0) {
throw new InvalidCoordinatesException("X coordinate ("
+ retPos.x.toString() + " is outside of screen "
+ width.toString());
}
final Double height = (double) d.getDisplayHeight();
if (point.y < 1) {
retPos.y = height * point.y;
}
if (retPos.y > height || retPos.y < 0) {
throw new InvalidCoordinatesException("Y coordinate ("
+ retPos.y.toString() + " is outside of screen height: "
+ height.toString());
}
return retPos;
}类似于上面的方法，也是要先推断传过来的坐标值是否小于1，假设小于1，当作百分比来球坐标值。假设超出屏幕的范围抛出异常，最后返回坐标值回到execute方法。
===============================================================================================================================
final boolean rv = device.swipe(absStartPos.x.intValue(),
absStartPos.y.intValue(), absEndPos.x.intValue(),
absEndPos.y.intValue(), steps);最后调用UiDevice.swipe方法来运行命令，推断是否运行成功。
总结
运行swipe命令有2中命令格式
- 控件
- 坐标
坐标又分为相对坐标百分比和绝对坐标两种方法。