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移植MonkeyRunner的图片对比和获取子图功能的实现-UiAutomator/Robotium篇
根据前一篇文章《移植MonkeyRunner的图片对比和获取子图功能的实现-Appium篇》所述,因为Appium和MonkeyRunner有一个共同点--代码控制流程都是在客户端实现的。所以要把MonkeyRunner在PC端实现的图片比对和获取子图功能移植到同样是在PC端运行的Appium是很容易的事情,但是对于在服务器端运行的Robotium和UiAutomator就是另外一回事了。
因为在Android的sdk中,MonkeyRunner获取子图和图片比对需要用到的以下两个类是没有支持的,简单来说就是java.awt这个库是不支持的:
import java.awt.image.BufferedImage; import javax.imageio.ImageIO;但是在Android的sdk中有Bitmap这个类来帮助我们完成类似的功能,同时这个类还提供了一个sameAs的方法来比对两个Bitmap是否一致,但是遗憾的是它没有像MonkeyRunner一样提供一个百分比来指明两个图片的差异接受程度,所以为了兼容多种情况,我们需要对sameAs方法提供多个重载方法。
当然,这只是验证代码,有bug的话自己调吧。
1. 移植代码
注意一下代码只在UiAutomator上面测试通过,但是我相信Robotium是一样的,因为他们都是运行在目标安卓机器上面的,大家可以自行验证下。
package libs; import java.io.FileInputStream; import java.io.FileNotFoundException; import android.graphics.Bitmap; import android.graphics.BitmapFactory; public class Util { public static boolean sameAs (String path1, String path2) throws FileNotFoundException { boolean res = false; FileInputStream fis1 = new FileInputStream(path1); Bitmap bitmap1 = BitmapFactory.decodeStream(fis1); FileInputStream fis2 = new FileInputStream(path2); Bitmap bitmap2 = BitmapFactory.decodeStream(fis2); res = sameAs(bitmap1,bitmap2); return res; } public static boolean sameAs (String path1, String path2,double percent) throws FileNotFoundException { FileInputStream fis1 = new FileInputStream(path1); Bitmap bitmap1 = BitmapFactory.decodeStream(fis1); FileInputStream fis2 = new FileInputStream(path2); Bitmap bitmap2 = BitmapFactory.decodeStream(fis2); return sameAs(bitmap1,bitmap2,percent); } public static boolean sameAs (Bitmap bitmap1, Bitmap bitmap2, double percent) { if(bitmap1.getHeight() != bitmap2.getHeight()) return false; if(bitmap1.getWidth() != bitmap2.getWidth()) return false; if(bitmap1.getConfig() != bitmap2.getConfig()) return false; int width = bitmap1.getWidth(); int height = bitmap2.getHeight(); int numDiffPixels = 0; for (int y = 0; y < height; y++) { for (int x = 0; x < width; x++) { if (bitmap1.getPixel(x, y) != bitmap2.getPixel(x, y)) { numDiffPixels++; } } } double numberPixels = height * width; double diffPercent = numDiffPixels / numberPixels; return percent <= 1.0D - diffPercent; } public static boolean sameAs (Bitmap bmp1, Bitmap bmp2) throws FileNotFoundException { boolean res = false; res = bmp1.sameAs(bmp2); return res; } public static Bitmap getSubImage(String path,int x,int y,int width,int height) throws FileNotFoundException { FileInputStream fis = new FileInputStream(path); Bitmap bitmap = BitmapFactory.decodeStream(fis); Bitmap res = Bitmap.createBitmap(bitmap, x, y, width, height); return res; } }
2. 调用代码示例
以下是UiAutomator示例,Robotium的示例请大家自行实现.
package sample.demo; import java.io.File; import java.io.IOException; import libs.Util; import android.graphics.Bitmap; import com.android.uiautomator.core.UiDevice; import com.android.uiautomator.core.UiObject; import com.android.uiautomator.core.UiObjectNotFoundException; import com.android.uiautomator.core.UiSelector; import com.android.uiautomator.testrunner.UiAutomatorTestCase; public class CompareScreenshots extends UiAutomatorTestCase { public void testCompareScreenshotsNSubScrenshots() throws UiObjectNotFoundException, IOException, InterruptedException { UiDevice device = getUiDevice(); //device.pressHome(); UiObject appNotes = new UiObject(new UiSelector().text("Notes")); appNotes.click(); Thread.sleep(3000); String p1 = "/data/local/tmp/1.bmp"; String p2 = "/data/local/tmp/2.bmp"; File f1 = new File(p1); if(f1.exists()) f1.delete(); File f2 = new File(p2); if(f2.exists()) f2.delete(); device.takeScreenshot(f1); device.takeScreenshot(f2); Bitmap sub1 = Util.getSubImage(p1, 6, 39, 474, 38); Bitmap sub2 = Util.getSubImage(p2, 6, 39, 474, 38); boolean same = Util.sameAs(sub1, sub2, 1.0); assertTrue(same); same = Util.sameAs(p1, p2, 0.9); assertTrue(same); } }
移植MonkeyRunner的图片对比和获取子图功能的实现-UiAutomator/Robotium篇
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