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Drag
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 org.json.JSONObject;
import java.util.Hashtable;
/**
* This handler is used to drag in the Android UI.
*
*/
public class Drag 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)
*/
private static class DragArguments {
public AndroidElement el;
public AndroidElement destEl;
public final Point start;
public final Point end;
public final Integer steps;
public DragArguments(final AndroidCommand command) throws JSONException {
final Hashtable<String, Object> params = command.params();
try {
if (params.get("elementId") != JSONObject.NULL) {
el = command.getElement();
}
} catch (final Exception e) {
el = null;
}
try {
if (params.get("destElId") != JSONObject.NULL) {
destEl = command.getDestElement();
}
} catch (final Exception e) {
destEl = null;
}
start = new Point(params.get("startX"), params.get("startY"));
end = new Point(params.get("endX"), params.get("endY"));
steps = (Integer) params.get("steps");
}
}
private AndroidCommandResult drag(final DragArguments dragArgs) {
Point absStartPos = new Point();
Point absEndPos = new Point();
final UiDevice device = UiDevice.getInstance();
try {
absStartPos = getDeviceAbsPos(dragArgs.start);
absEndPos = getDeviceAbsPos(dragArgs.end);
} catch (final InvalidCoordinatesException e) {
return getErrorResult(e.getMessage());
}
Logger.debug("Dragging from " + absStartPos.toString() + " to "
+ absEndPos.toString() + " with steps: " + dragArgs.steps.toString());
final boolean rv = device.drag(absStartPos.x.intValue(),
absStartPos.y.intValue(), absEndPos.x.intValue(),
absEndPos.y.intValue(), dragArgs.steps);
if (!rv) {
return getErrorResult("Drag did not complete successfully");
}
return getSucce***esult(rv);
}
private AndroidCommandResult dragElement(final DragArguments dragArgs) {
Point absEndPos = new Point();
if (dragArgs.destEl == null) {
try {
absEndPos = getDeviceAbsPos(dragArgs.end);
} catch (final InvalidCoordinatesException e) {
return getErrorResult(e.getMessage());
}
Logger.debug("Dragging the element with id " + dragArgs.el.getId()
+ " to " + absEndPos.toString() + " with steps: "
+ dragArgs.steps.toString());
try {
final boolean rv = dragArgs.el.dragTo(absEndPos.x.intValue(),
absEndPos.y.intValue(), dragArgs.steps);
if (!rv) {
return getErrorResult("Drag did not complete successfully");
} else {
return getSucce***esult(rv);
}
} catch (final UiObjectNotFoundException e) {
return getErrorResult("Drag did not complete successfully"
+ e.getMessage());
}
} else {
Logger.debug("Dragging the element with id " + dragArgs.el.getId()
+ " to destination element with id " + dragArgs.destEl.getId()
+ " with steps: " + dragArgs.steps);
try {
final boolean rv = dragArgs.el.dragTo(dragArgs.destEl.getUiObject(),
dragArgs.steps);
if (!rv) {
return getErrorResult("Drag did not complete successfully");
} else {
return getSucce***esult(rv);
}
} catch (final UiObjectNotFoundException e) {
return getErrorResult("Drag did not complete successfully"
+ e.getMessage());
}
}
}
@Override
public AndroidCommandResult execute(final AndroidCommand command)
throws JSONException {
// DragArguments is created on each execute which prevents leaking state
// across executions.
final DragArguments dragArgs = new DragArguments(command);
if (command.isElementCommand()) {
return dragElement(dragArgs);
} else {
return drag(dragArgs);
}
}
}
首先来看DragArguments对象。该类为Drag中的私有类，它的构造方法回去解析传入的command,然后获得并存储一些drag方法用到的参数。例如拖拽控件时，被拖拽的控件对象，拖拽到的控件对象。坐标拖拽时，起始点坐标、终点坐标、步骤。所以就把它看成一个实体类就行了。然后分控件和坐标分别调用dragElement()和drag()方法。
dragElement()
如果拖拽到的控件不存在，那么就要用到结束坐标。如果拖拽到的控件存在，那么就用该控件计算拖拽到坐标，调用UiObject.dragTo()方法来执行命令。
drag()
直接调用UiObject.dragTo来执行