根據前一篇文章《移植MonkeyRunner的圖片對比和獲取子圖功能的實現-Appium篇》 所述,因為Appium和MonkeyRunner有一個共同點--代碼控制流程都是在客戶端實現的。所以要把MonkeyRunner在PC端實現的圖 片比對和獲取子圖功能移植到同樣是在PC端運行的Appium是很容易的事情,但是對于在服務器端運行的Robotium和UiAutomator就是另 外一回事了。
因為在Android的sdk中,MonkeyRunner獲取子圖和圖片比對需要用到的以下兩個類是沒有支持的,簡單來說就是java.awt這個庫是不支持的:
import java.awt.p_w_picpath.BufferedImage; import javax.p_w_picpathio.ImageIO;
但是在Android的sdk中有Bitmap這個類來幫助我們完成類似的功能,同時這個類還提供了一個sameAs的方法來比對兩個Bitmap是否一 致,但是遺憾的是它沒有像MonkeyRunner一樣提供一個百分比來指明兩個圖片的差異接受程度,所以為了兼容多種情況,我們需要對sameAs方法 提供多個重載方法。
當然,這只是驗證代碼,有bug的話自己調吧。
注意一下代碼只在UiAutomator上面測試通過,但是我相信Robotium是一樣的,因為他們都是運行在目標安卓機器上面的,大家可以自行驗證下。
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 path2, String path3) throws FileNotFoundException { boolean res = false; FileInputStream fis1 = new FileInputStream(path2); Bitmap bitmap1 = BitmapFactory.decodeStream(fis1); FileInputStream fis2 = new FileInputStream(path3); Bitmap bitmap2 = BitmapFactory.decodeStream(fis2); res = sameAs(bitmap1,bitmap2); return res; } public static boolean sameAs (String path2, String path3,double percent) throws FileNotFoundException { FileInputStream fis1 = new FileInputStream(path2); Bitmap bitmap1 = BitmapFactory.decodeStream(fis1); FileInputStream fis2 = new FileInputStream(path3); 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; } }
以下是UiAutomator示例,Robotium的示例請大家自行實現.
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); } }
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