PC端获取Android手机当前屏幕截图的方法

  今天来研究一下PC端获取手机当前屏幕截图的方法，在DDMS的Devices工具栏上我们可以看到有一个Screen Capture功能按钮，我们可以获取当前屏幕信息(为了方便截图，点了哈Rotate):       

      像豌豆荚、91助手这样的PC端连接Android的软件，在PC端获取截图的方法应该都是使用高效的ddms截图方式，于是就需要使用ddmlib这个库。为了方便使用，我在ddmlib库的基础上增加了一个ScreenShot的类，提供一些简单的方法用于截图。
   如果开发语言是C++，则可以jni调用，做起来也很方便ScreenShot.java：package com.wts.screenshot; import java.awt.image.BufferedImage;import java.awt.image.RenderedImage;import java.io.File;import java.io.IOException; import javax.imageio.ImageIO; import com.android.ddmlib.AdbCommandRejectedException;import com.android.ddmlib.AndroidDebugBridge;import com.android.ddmlib.IDevice;import com.android.ddmlib.RawImage;import com.android.ddmlib.TimeoutException;  public class ScreenShot {        public IDevice device ;             /**        * 构造函数，默认获取第一个设备        */       public ScreenShot(){              AndroidDebugBridge.init(false);               device = this.getDevice(0);       }             /**        * 构造函数，指定设备序号        * @param deviceIndex 设备序号        */       public ScreenShot(int deviceIndex){              AndroidDebugBridge.init(false); //              device = this.getDevice(deviceIndex);       }             /**        * 直接抓取屏幕数据        * @return 屏幕数据        */       public RawImage getScreenShot(){              RawImage rawScreen = null;              if(device!=null){                     try {                            rawScreen = device.getScreenshot();                     } catch (TimeoutException e) {                            // TODO Auto-generated catch block                            e.printStackTrace();                     } catch (AdbCommandRejectedException e) {                            // TODO Auto-generated catch block                            e.printStackTrace();                     } catch (IOException e) {                            // TODO Auto-generated catch block                            e.printStackTrace();                     }              }else{                     System.err.print("没有找到设备");              }              return rawScreen;       }                   /**        * 获取图片byte[]数据        * @return 图片byte[]数据        */       public byte[] getScreenShotByteData(){              RawImage rawScreen = getScreenShot();              if(rawScreen != null){                     return rawScreen.data;              }              return null;       }                   /**        * 抓取图片并保存到指定路径        * @param path 文件路径        * @param fileName 文件名        */       public void getScreenShot(String path,String fileName){              RawImage rawScreen = getScreenShot();              if(rawScreen!=null){                     Boolean landscape = false;                     int width2 = landscape ? rawScreen.height : rawScreen.width;                     int height2 = landscape ? rawScreen.width : rawScreen.height;                     BufferedImage image = new BufferedImage(width2, height2,                                   BufferedImage.TYPE_INT_RGB);                     if (image.getHeight() != height2 || image.getWidth() != width2) {                            image = new BufferedImage(width2, height2,                                          BufferedImage.TYPE_INT_RGB);                     }                     int index = 0;                     int indexInc = rawScreen.bpp >> 3;                     for (int y = 0; y < rawScreen.height; y++) {                            for (int x = 0; x < rawScreen.width; x++, index += indexInc) {                                   int value = rawScreen.getARGB(index);                                   if (landscape)                                          image.setRGB(y, rawScreen.width - x - 1, value);                                   else                                          image.setRGB(x, y, value);                            }                     }                     try {                            ImageIO.write((RenderedImage) image, "PNG", new File(path + "/" + fileName + ".png"));                     } catch (IOException e) {                            // TODO Auto-generated catch block                            e.printStackTrace();                     }              }       }             /**        * 获取得到device对象        * @param index 设备序号        * @return 指定设备device对象        */       private IDevice getDevice(int index) {              IDevice device = null;              AndroidDebugBridge bridge = AndroidDebugBridge                            .createBridge("adb", true);// 如果代码有问题请查看API，修改此处的参数值试一下              waitDevicesList(bridge);              IDevice devices[] = bridge.getDevices();                             for (int i = 0; i < devices.length; i++) {                     System.out.println(devices[i].toString());              }                             if(devices.length < index){                     //没有检测到第index个设备                     System.err.print("没有检测到第" + index + "个设备");              }              else              {                     if (devices.length-1>=index) {                            device = devices[index];                     }                     else                     {                            device = devices[0];                     }              }              return device;       }             /**        * 等待查找device        * @param bridge        */       private void waitDevicesList(AndroidDebugBridge bridge) {              int count = 0;              while (bridge.hasInitialDeviceList() == false) {                     try {                            Thread.sleep(500);                            count++;                     } catch (InterruptedException e) {                     }                     if (count > 60) {                            System.err.print("等待获取设备超时");                            break;                     }              }       }}
      使用的话很简单（注意这是计算机上的截取Android屏幕的工具，并不是Android上截屏的工具），创建一个Java项目就行了     public class PCScreenShot {
        public static void main(String[] args) {
               ScreenShot screenShot = new ScreenShot();     //支持多个手机端设备管理。
               screenShot.getScreenShot("e://wts//", "screencapture_"+System.currentTimeMillis());                           }
          }   每次执行之后，在手机上换到下一屏，执行三次之后，结果如图:
                         

附：        ddmlib.jar包在 tools/lib文件夹下