# Swipe 我定義為滑動，但它字面的意思又不是，事件的形式類似于小時候拿著一塊石頭片，朝水面飛過去，如果你手法可以那么就是swipe走的路線，如果你手法不行，接觸水面的時候就沒再飛起來那就會被人嘲笑的。 ~~~ 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); } } ~~~ 不管它如何定義，先分析源碼最后再定義。 ~~~ 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(); ~~~ 首先從命令里取得參數，然后解析出所需要的3個變量：起始點start、終點end、步驟steps。然后獲得設備對象，定義2個私有Point對象,以備后用。 然后分條件處理，處理控件還是處理坐標。 ## 控件 ~~~ final AndroidElement el = command.getElement(); absStartPos = el.getAbsolutePosition(start); absEndPos = el.getAbsolutePosition(end, false); ~~~ 首先獲取控件對象，再通過getAbsolutePosition傳入不同的參數獲得在該控件上點擊的起始點和結束點。 ~~~ 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; } ~~~ 上面的一大段代碼,看起來很復雜，其實很簡單，業務很容易理解，處理這種點的時候就需要判斷很多東西。上面的代碼首先分析x坐標然后分析y坐標。x和y坐標的判斷和處理時一樣的，所以我只講一下x坐標。 首先判斷x坐標是否為0，如果為0，定義初始點的x坐標為控件的中心點的橫坐標。如果x的坐標小于1，說明坐標為相對坐標，用百分比來求值，此時就要與寬度做乘積運算得到具體值。如果上面2種情況都不符合，那就是具體坐標值，那就直接元素的x坐標值加上控件的邊框左坐標值。最后根據傳入的boolean值來判斷是否做一個超出邊界的驗證。如果超出邊界就跑出異常。y坐標的獲取方式類似。最后得到坐標值并返回，回到execute方法中。 ## 坐標 ~~~ absStartPos = getDeviceAbsPos(start); absEndPos = getDeviceAbsPos(end); ~~~ 通過調用getDeviceAbsPos()方法得到坐標值來初始化之前聲明的私有Point對象. ~~~ 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: " + 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; } ~~~ 類似于上面的方法，也是要先判斷傳過來的坐標值是否小于1，如果小于1，當作百分比來球坐標值。如果超出屏幕的范圍拋出異常，最后返回坐標值回到execute方法。 =============================================================================================================================== ~~~ final boolean rv = device.swipe(absStartPos.x.intValue(), absStartPos.y.intValue(), absEndPos.x.intValue(), absEndPos.y.intValue(), steps); ~~~ 最后調用UiDevice.swipe方法來執行命令，判斷是否執行成功。 # 總結 執行swipe命令有2中命令格式 * 控件 * 坐標 坐標又分為相對坐標百分比和絕對坐標兩種方法。