# TouchLongClick ~~~ package io.appium.android.bootstrap.handler; import android.os.SystemClock; import com.android.uiautomator.common.ReflectionUtils; import com.android.uiautomator.core.UiObjectNotFoundException; import io.appium.android.bootstrap.Logger; import java.lang.reflect.Method; /** * This handler is used to long click elements in the Android UI. * */ public class TouchLongClick extends TouchEvent { /* * UiAutomator has a broken longClick, so we'll try to implement it using the * touchDown / touchUp events. */ private boolean correctLongClick(final int x, final int y, final int duration) { try { /* * bridge.getClass() returns ShellUiAutomatorBridge on API 18/19 so use * the super class. */ final ReflectionUtils utils = new ReflectionUtils(); final Method touchDown = utils.getControllerMethod("touchDown", int.class, int.class); final Method touchUp = utils.getControllerMethod("touchUp", int.class, int.class); if ((Boolean) touchDown.invoke(utils.getController(), x, y)) { SystemClock.sleep(duration); if ((Boolean) touchUp.invoke(utils.getController(), x, y)) { return true; } } return false; } catch (final Exception e) { Logger.debug("Problem invoking correct long click: " + e); return false; } } @Override protected boolean executeTouchEvent() throws UiObjectNotFoundException { final Object paramDuration = params.get("duration"); int duration = 2000; // two seconds if (paramDuration != null) { duration = Integer.parseInt(paramDuration.toString()); } printEventDebugLine("TouchLongClick", duration); if (correctLongClick(clickX, clickY, duration)) { return true; } // if correctLongClick failed and we have an element // then uiautomator's longClick is used as a fallback. if (isElement) { Logger.debug("Falling back to broken longClick"); return el.longClick(); } return false; } } ~~~ TouchLongClick類繼承于TouchEvent，而TouchEvent繼承于CommandHandler.調用TouchEvent的execute的方法中，調用了executeTouchEvent方法，所以我們來看上面的executeTouchEvent就好了，執行長點擊事件，在uiautomator里有UiObject.longClick()方法，但是寫過case的人知道，有時候這個方法達不到我們的需求，但是我們是自己了反射調用TouchDown和TouchUp兩個個方法，而在appium里幫你解決了，它自己就幫你做到了這一點，如果你傳入到是控件對象，那無可厚非，還是調用UiObject.longClick方法，如果你想根據坐標，時間在點擊的話，那么就調用currectLongClick這個appium給你封裝好的方法。 ~~~ final ReflectionUtils utils = new ReflectionUtils(); final Method touchDown = utils.getControllerMethod("touchDown", int.class, int.class); final Method touchUp = utils.getControllerMethod("touchUp", int.class, int.class); ~~~ 通過反射得到uiautomator里的沒有公開的類，從而我們想要的方法touchDown和touchUp. ~~~ public ReflectionUtils() throws IllegalArgumentException, IllegalAccessException, SecurityException, NoSuchFieldException { final UiDevice device = UiDevice.getInstance(); final Object bridge = enableField(device.getClass(), "mUiAutomationBridge") .get(device); if (API_18) { controller = enableField(bridge.getClass().getSuperclass(), "mInteractionController").get(bridge); } else { controller = enableField(bridge.getClass(), "mInteractionController") .get(bridge); } } ~~~ 因為uiautomator api的改動，在api18以上的版本中，mInteractionController是存在于UiAutomationBridge的父類中的變量，而在18以下的版本中它是存在于本類中的。所以反射時會有一點點小小點差異，但總的來說都是要獲得InteractionController這個類，因為這個類里面存在有我們要但touch類但方法。最后我們就能輕松調用鼠標的TouchUp和TouchDown他們啦。然后再加上時間，長按就實現啦。 # TouchUp ~~~ package io.appium.android.bootstrap.handler; import com.android.uiautomator.common.ReflectionUtils; import com.android.uiautomator.core.UiObjectNotFoundException; import io.appium.android.bootstrap.Logger; import java.lang.reflect.Method; /** * This handler is used to perform a touchDown event on an element in the * Android UI. * */ public class TouchDown extends TouchEvent { @Override protected boolean executeTouchEvent() throws UiObjectNotFoundException { printEventDebugLine("TouchDown"); try { final ReflectionUtils utils = new ReflectionUtils(); final Method touchDown = utils.getControllerMethod("touchDown", int.class, int.class); return (Boolean) touchDown.invoke(utils.getController(), clickX, clickY); } catch (final Exception e) { Logger.debug("Problem invoking touchDown: " + e); return false; } } } ~~~ 有了上面的分析，對TouchUp和TouchDown還有TouchMove的分析就不用再多說了，都是反射的原理 # TouchDown 類同 # TouchMove 類同