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MonkeyImage API 实践全记录

发表于：2024-11-29 作者：热门IT资讯网编辑

编辑最后更新 2024年11月29日，1. 背景鉴于网上使用MonkeyImage的实例除了方法sameAs外很难找到，所以本人把实践各个API的过程记录下来然自己有更感性的认识，也为往后的工作打下更好的基础。同时也和上一篇文章《Monk

1. 背景

鉴于网上使用MonkeyImage的实例除了方法sameAs外很难找到，所以本人把实践各个API的过程记录下来然自己有更感性的认识，也为往后的工作打下更好的基础。同时也和上一篇文章《MonkeyDevcie API 实践全记录》起到相互呼应的作用。

因为并没有MonkeyRunner的项目背景，所以这里更多的是描述各个API是怎么一回事，而不是描述在什么场景下需要用到。也就是说是去回答What，而不是How。

首先我们先看下官方给出的MonkeyImage的API描述，对比我现在反编译的最新的源码是一致的：

Return Type	Methods	Comment
string	convertToBytes (string format) Converts the current image to a particular format and returns it as a string that you can then access as an iterable of binary bytes.
tuple	getRawPixel (integer x, integer y) Returns the single pixel at the image location (x,y), as an a tuple of integer, in the form (a,r,g,b).
integer	getRawPixelInt (integer x, integer y) Returns the single pixel at the image location (x,y), as a 32-bit integer.
`MonkeyImage`	getSubImage (tuple rect) Creates a new `MonkeyImage` object from a rectangular selection of the current image.
boolean	sameAs (`MonkeyImage` other, float percent) Compares this `MonkeyImage` object to another and returns the result of the comparison. The`percent` argument specifies the percentage difference that is allowed for the two images to be "equal".
void	writeToFile (string path, string format) Writes the current image to the file specified by `filename`, in the format specified by `format`.

2. String convertToBytes(string format)

2.1 示例

img = device.takeSnapshot()  png1 = img.convertToBytes()  png2 = img.convertToBytes()  bmp = img.convertToBytes('bmp')  jpg = img.convertToBytes('JPG')  gif = img.convertToBytes('gif')  raw = img.convertToBytes('raw')  invalid = img.convertToBytes('xxx')  #is the 2 pngs equal? print "Two png is equal in bytes:",png1 == png2  #is the png equals to bmp? print "png and bmp is equal in bytes:", png1 == bmp  #is the jpg eqals to the raw? print "jpg and bmp is equals in bytes:",jpg == bmp  #is the jpg eqals to the xxx? print "jpg is a valid argument:",jpg != invalid  #is the gif eqals to the xxx? print "gif is a valid argument:",gif != invalid  #is the bmp eqals to the xxx? print "bmp is a valid argument:",bmp != invalid  #is the raw equas to xxxx? aims at checking whether argument 'raw' is invalid like 'xxx' print 'raw is a valid argument:',raw != invalid  #would invalid argument drop to png by default? print 'Would invalid argument drop to png by default:',png1 == invalid

输出：

2.2 分析

除了默认的png，常用格式jpg,gif都支持，但bmp格式无效，至于还支持什么其他格式，尝试跟踪了下代码，没有找到想要的结果

3. tuple getRawPixel(integer x, integer y)和Integer getRawPixelInt (integer x, integer y)

3.1 示例

viewer = device.getHierarchyViewer() note = viewer.findViewById('id/title') text = viewer.getText(note) print text.encode('utf-8')  point = viewer.getAbsoluteCenterOfView(note) x = point.x y = point.y  img = device.takeSnapshot()  pixelTuple = img.getRawPixel(x,y) pixelInt = img.getRawPixelInt(x,y) print "Pixel in tuple:",pixelTuple print "Pixel in int:", pixelInt

输出：

3.2 分析

这里把两个相似的方法放到一起来比较，他们都是获得指定一个坐标的argb值，其中a就是alpha（透明度），rgb就是颜色三元组红绿蓝了。但前者返回的是一个元组，后者返回的是整型。那么两个类型的值是怎么对应起来的呢？其实就是第一个方法的元组的返回值(a,r,g,b)中的每个值转换成8个bit的二进制值然后按顺序从左到右排列起来再转换成十进制整型就是第二个方法的返回值了。以示例输出为例，比如b在第一个返回值中是141，换成二进制就是1001101，其他雷同。
再看第二个方法的整型返回值是-7500403，转换成二进制其实就是11111111100011011000110110001101（至于下图calculator转换后为什么前面那么多个1，其实不用管他，因为是负数所以前面要加上FF之类而已），那么最后的8个bit转换成十进制其实就是上面的的141.

4. MonkeyImage getSubImage(tuple rect)

4.1 示例

from com.android.monkeyrunner import MonkeyRunner,MonkeyDevice,MonkeyImage from com.android.monkeyrunner.easy import EasyMonkeyDevice,By from com.android.chimpchat.hierarchyviewer import HierarchyViewer from com.android.hierarchyviewerlib.models import ViewNode, Window from java.awt import Point  #from com.android.hierarchyviewerlib.device import   #Connect to the target targetDevice targetDevice = MonkeyRunner.waitForConnection()  easy_device = EasyMonkeyDevice(targetDevice)  #touch a button by id would need this targetDevice.startActivity(component="com.example.android.notepad/com.example.android.notepad.NotesList")  #invoke the menu options MonkeyRunner.sleep(6) #targetDevice.press('KEYCODE_MENU', MonkeyDevice.DOWN_AND_UP);  '''      public ViewNode findViewById(String id)       * @param id id for the view.      * @return view with the specified ID, or {@code null} if no view found. ''' #MonkeyRunner.alert("Continue?", "help", "Ok?")  pic = targetDevice.takeSnapshot() pic = pic.getSubImage((0,38,480,762))  newPic = targetDevice.takeSnapshot() newPic = newPic.getSubImage((0,38,480,762))  print (newPic.sameAs(pic,1.0)) newPic.writeToFile('./shot1.png','png')