問題

在使用Appium Inspector對安卓-微醫生APP登陸頁元素獲取的時候發現無法獲取到內容，Appium報錯如下：

[HTTP]?-->?GET?/wd/hub/session/669c743a-cede-43f2-8950-019af660f2f6/screenshot [HTTP]?{} [MJSONWP?(669c743a)]?Calling?AppiumDriver.getScreenshot()?with?args:?["669c743a-cede-43f2-8950-019af660f2f6"] [WD?Proxy]?Matched?'/screenshot'?to?command?name?'getScreenshot' [WD?Proxy]?Proxying?[GET?/screenshot]?to?[GET?http://127.0.0.1:8200/wd/hub/session/fb84ef2a-405f-4983-b2c4-f833ec8b5562/screenshot]?with?no?body [WD?Proxy]?Got?response?with?status?500:?{"sessionId":"fb84ef2a-405f-4983-b2c4-f833ec8b5562","value":{"error":"unable?to?capture?screen","message":"Failed?to?capture?a?screenshot.?Does?the?current?view?have?'secure'?flag?set?","stacktrace":"io.appium.uiautomator2.common.exceptions.TakeScreenshotException:?Failed?to?capture?a?screenshot.?Does?the?current?view?have?'secure'?flag?set?\n\tat?io.appium.uiautomator2.utils.ScreenshotHelper.takeDeviceScreenshot(ScreenshotHelper.java:131)\n\tat?io.appium.uiautomator2.utils.ScreenshotHelper.takeScreenshot(ScreenshotHelper.java:61)\n\tat?io.appium.uiautomator2.utils.ScreenshotHelper.takeScreenshot(ScreenshotHelper.java:79)\n\tat?io.appium.uiautomator2.handler.CaptureScreenshot.safeHandle(CaptureScreenshot.java:32)\n\tat?io.appium.uiautomator2.handler.request.SafeRequestHandler.handle(SafeRequestHandler.java:41)\n\tat?io.appium.uiautomator2.server.AppiumServlet.handleRequest(AppiumServlet.java:262)\n\tat?io.appium.uiautomator2.server.AppiumServlet.handleHttpRequest(AppiumServlet.java:256)\n\tat?io.appium.uia... [W3C]?Matched?W3C?error?code?'unable?to?capture?screen'?to?UnableToCaptureScreen [MJSONWP?(669c743a)]?Encountered?internal?error?running?command:?io.appium.uiautomator2.common.exceptions.TakeScreenshotException:?Failed?to?capture?a?screenshot.?Does?the?current?view?have?'secure'?flag?set? [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.utils.ScreenshotHelper.takeDeviceScreenshot(ScreenshotHelper.java:131) [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.utils.ScreenshotHelper.takeScreenshot(ScreenshotHelper.java:61) [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.utils.ScreenshotHelper.takeScreenshot(ScreenshotHelper.java:79) [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.handler.CaptureScreenshot.safeHandle(CaptureScreenshot.java:32) [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.handler.request.SafeRequestHandler.handle(SafeRequestHandler.java:41) [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.server.AppiumServlet.handleRequest(AppiumServlet.java:262) [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.server.AppiumServlet.handleHttpRequest(AppiumServlet.java:256) [MJSONWP?(669c743a)]???at?io.appium.uiautomator2.http.ServerHandler.channelRead(ServerHandler.java:68) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345) [MJSONWP?(669c743a)]???at?io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345) [MJSONWP?(669c743a)]???at?io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:435) [MJSONWP?(669c743a)]???at?io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) [MJSONWP?(669c743a)]???at?io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267) [MJSONWP?(669c743a)]???at?io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:250) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345) [MJSONWP?(669c743a)]???at?io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:266) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345) [MJSONWP?(669c743a)]???at?io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1294) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366) [MJSONWP?(669c743a)]???at?io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352) [MJSONWP?(669c743a)]???at?io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911) [MJSONWP?(669c743a)]???at?io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131) [MJSONWP?(669c743a)]???at?io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:611) [MJSONWP?(669c743a)]???at?io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:552) [MJSONWP?(669c743a)]???at?io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:466) [MJSONWP?(669c743a)]???at?io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438) [MJSONWP?(669c743a)]???at?io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:140) [MJSONWP?(669c743a)]???at?io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144) [MJSONWP?(669c743a)]???at?java.lang.Thread.run(Thread.java:923) [MJSONWP?(669c743a)]? [HTTP]?<--?GET?/wd/hub/session/669c743a-cede-43f2-8950-019af660f2f6/screenshot?500?270?ms?-?164 [HTTP]

FLAG_SECURE

APP出于安全考慮，不希望被用戶截屏或者錄屏，所以使用FLAG_SECURE來進行處理

禁止截屏的實現方式并不是很難，在需要設置禁止截屏的 Activity 的生命周期 onCreate() 方法中添加一行代碼即可

void?onCreate()?{//禁止截屏//?方法?1getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);//?方法?2getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,?WindowManager.LayoutParams.FLAG_SECURE); }

設置了這個flag后, 系統會把當前窗口的內容視為安全隱私內容, 系統會阻止這些內容被截屏或者在不安全可靠的場景顯示出來.

在Google的過程中, 發現這個flag可以實現以下功能:

• 阻止屏幕截圖

• 在Recent apps(任務切換界面)中只顯示應用名字和圖標, 不顯示內容

• Google App的Now on tap功能不會去分析你的頁面的內容

代碼里面可以通過去除來去除這個防錄屏

Window?window?=?getActivity().getWindow(); window.clearFlags(WindowManager.LayoutParams.FLAG_SECURE);

不過在進行自動化測試的時候就不能這樣操作了，但其實這個只會影響錄屏，而不影響操作，所以我們直接拿到頁面元素，就可以通過元素標簽，來編寫定位信息來操作元素了。

driver?=?app_webdriver.Remote("http://127.0.0.1:4723/wd/hub",?desired_caps) driver.page_source

通過這個方式就可以拿到賬號密碼的元素定位

<android.widget.EditText?index="0"?package="com.greenline.yihuantong"class="android.widget.EditText"?text="登錄名/手機號"resource-id="com.greenline.yihuantong:id/bc7"checkable="false"?checked="false"?clickable="true"enabled="true"?focusable="true"?focused="true"long-clickable="true"?password="false"scrollable="false"?selected="false"bounds="[66,658][1014,783]"?displayed="true"/> <android.widget.EditText?index="2"?package="com.greenline.yihuantong"class="android.widget.EditText"?text="密碼"resource-id="com.greenline.yihuantong:id/bca"checkable="false"?checked="false"?clickable="true"enabled="true"?focusable="true"?focused="false"long-clickable="true"?password="true"scrollable="false"?selected="false"bounds="[66,784][1014,909]"?displayed="true"/>

提取一下

-?{?desc:?"賬號",type:?"xpath",value:?'//*[@class="android.widget.EditText"][1]',?name:?"username"?} -?{?desc:?"密碼",type:?"xpath",value:?'//*[@class="android.widget.EditText"][2]',?name:?"password"?}

總結

以上是生活随笔為你收集整理的FLAG_SECURE：安卓无法抓取页面截屏的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。