robotium原理之获取WebElement元素

	@Override
	public boolean onJsPrompt(WebView view, String url, String message,	String defaultValue, JsPromptResult r) {

		if(message != null && (message.contains(";,") || message.contains("robotium-finished"))){
                        //如果提示框中包含robotium-finished字符串，即表示那段JS注入脚本执行完毕了
			if(message.equals("robotium-finished")){
				webElementCreator.setFinished(true);
			}
			else{
				webElementCreator.createWebElementAndAddInList(message, view);//有人提示框中的内容，那么就可以对提示框中的内容进行处理了
			}
			r.confirm();
			return true;
		}
		else {
			if(originalWebChromeClient != null) {
				return originalWebChromeClient.onJsPrompt(view, url, message, defaultValue, r); 
			}
			return true;
		}

	}

	public void enableJavascriptAndSetRobotiumWebClient(List<WebView> webViews, WebChromeClient originalWebChromeClient){
		this.originalWebChromeClient = originalWebChromeClient;

		for(final WebView webView : webViews){

			if(webView != null){ 
				inst.runOnMainSync(new Runnable() {
					public void run() {
						webView.getSettings().setJavaScriptEnabled(true);
						webView.setWebChromeClient(robotiumWebClient);

					}
				});
			}
		}
	}

	private WebElement createWebElementAndSetLocation(String information, WebView webView){
		String[] data = information.split(";,");            //将消息按;,符号分割，其中;,符号是在前面执行JS时加入的
		String[] elements = null;
		int x = 0;
		int y = 0;
		int width = 0;
		int height = 0;
		Hashtable<String, String> attributes = new Hashtable<String, String>();
		try{
			x = Math.round(Float.valueOf(data[5]));
			y = Math.round(Float.valueOf(data[6]));
			width = Math.round(Float.valueOf(data[7]));
			height = Math.round(Float.valueOf(data[8]));	
			elements = data[9].split("\\#\\$");
		}catch(Exception ignored){}

		if(elements != null) {
			for (int index = 0; index < elements.length; index++){
				String[] element = elements[index].split("::");
				if (element.length > 1) {
					attributes.put(element[0], element[1]);
				} else {
					attributes.put(element[0], element[0]);
				}
			}
		}

		WebElement webElement = null;

		try{
			webElement = new WebElement(data[0], data[1], data[2], data[3], data[4], attributes);//将id、text、name等字段存入
			setLocation(webElement, webView, x, y, width, height);
		}catch(Exception ignored) {}

		return webElement;
	}

	/**
	 * Sets the location of a {@code WebElement} 
	 * 
	 * @param webElement the {@code TextView} object to set location 
	 * @param webView the {@code WebView} the text is shown in
	 * @param x the x location to set
	 * @param y the y location to set
	 * @param width the width to set
	 * @param height the height to set
	 */

	private void setLocation(WebElement webElement, WebView webView, int x, int y, int width, int height ){
		float scale = webView.getScale();
		int[] locationOfWebViewXY = new int[2];
		webView.getLocationOnScreen(locationOfWebViewXY);

		int locationX = (int) (locationOfWebViewXY[0] + (x + (Math.floor(width / 2))) * scale);
		int locationY = (int) (locationOfWebViewXY[1] + (y + (Math.floor(height / 2))) * scale);

		webElement.setLocationX(locationX);
		webElement.setLocationY(locationY);
	}