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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