public static boolean sameAs(BufferedImage myImage,BufferedImage otherImage, double percent)
	{
		//BufferedImage otherImage = other.getBufferedImage();
	     //BufferedImage myImage = getBufferedImage();
	     
	
	     if (otherImage.getWidth() != myImage.getWidth()) {
	       return false;
	     }
	     if (otherImage.getHeight() != myImage.getHeight()) {
	       return false;
	     }
	     
	     int[] otherPixel = new int[1];
	     int[] myPixel = new int[1];
	     
	     int width = myImage.getWidth();
	     int height = myImage.getHeight();
	     
	     int numDiffPixels = 0;
	     
	     for (int y = 0; y < height; y++) {
	       for (int x = 0; x < width; x++) {
	         if (myImage.getRGB(x, y) != otherImage.getRGB(x, y)) {
	           numDiffPixels++;
	         }
	       }
	     }
	     double numberPixels = height * width;
	     double diffPercent = numDiffPixels / numberPixels;
	     return percent <= 1.0D - diffPercent;
	   }
	
	   public static BufferedImage getSubImage(BufferedImage image,int x, int y, int w, int h)
	   {
	     return image.getSubimage(x, y, w, h);
	   }
	   

		public static BufferedImage getImageFromFile(File f) {
		
			BufferedImage img = null;
			
			try {
				img = ImageIO.read(f);
				
			} catch (IOException e) {
				//if failed, then copy it to local path for later check:TBD
				//FileUtils.copyFile(f, new File(p1));
				e.printStackTrace();
				System.exit(1);
			}
			return img;
		}

2. 客户端调用代码举例

package sample.demo.AppiumDemo;

import static org.junit.Assert.*;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.URL;

import javax.imageio.ImageIO;

import libs.Util;
import io.appium.java_client.android.AndroidDriver;

import org.apache.commons.io.FileUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.OutputType;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.remote.DesiredCapabilities;

public class CompareScreenShots {

	private AndroidDriver driver;
	
	@Before
	public void setUp() throws Exception {
		DesiredCapabilities cap = new DesiredCapabilities();
		cap.setCapability("deviceName", "Android");
		cap.setCapability("appPackage", "com.example.android.notepad");
		cap.setCapability("appActivity", ".NotesList");
		
		driver = new AndroidDriver(new URL("http://127.0.0.1:4723/wd/hub"),cap);
	}

	@After
	public void tearDown() throws Exception {
		driver.quit();
	}

	@Test
	public void compareScreenAndSubScreen() throws InterruptedException, IOException{
		Thread.sleep(2000);
		
		WebElement el = driver.findElement(By.className("android.widget.ListView")).findElement(By.name("Note1"));
		el.click();
		Thread.sleep(1000);
		String p1 = "C:/1";
		String p2 = "C:/2";

		File f2 = new File(p2);
		
		File f1 = driver.getScreenshotAs(OutputType.FILE);
		FileUtils.copyFile(f1, new File(p1));
		
		BufferedImage img1 = Util.getImageFromFile(f1);
		
		f2 = driver.getScreenshotAs(OutputType.FILE);
		FileUtils.copyFile(f2, new File(p2));
		BufferedImage img2 = Util.getImageFromFile(f2);

		
		Boolean same = Util.sameAs(img1, img2, 0.9);
		assertTrue(same);
		
		BufferedImage subImg1 = Util.getSubImage(img1, 6, 39, 474, 38);
		BufferedImage subImg2 = Util.getSubImage(img1, 6, 39, 474, 38);
		same = Util.sameAs(subImg1, subImg2, 1);
		
		File f3 = new File("c:/sub-1.png");
		ImageIO.write(subImg1, "PNG", f3);
		
		File f4 = new File("c:/sub-2.png");
		ImageIO.write(subImg1, "PNG", f4);
		
	}

	
}