PC端获取Android手机当前屏幕截图的方法

秒速五厘米 2022-08-26 14:25 313阅读 0赞

http://www.apkbus.com/blog-33641-44385.html

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):

[![215031fqv6slzlbyurqhub.jpg][]][215031fqv6slzlbyurqhub.jpg]

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:

[ ![171825llhqe77zibvlielr.jpg][]][171825llhqe77zibvlielr.jpg]

附：

ddmlib.jar包在 tools/lib文件夹下

[ ![171254m99nx3vjuqrl9elm.png][]][171254m99nx3vjuqrl9elm.png]

![215031fqv6slzlbyurqhub.jpg][]

[215031fqv6slzlbyurqhub.jpg]: http://www.apkbus.com/data/attachment/album/201211/14/215031fqv6slzlbyurqhub.jpg
[171825llhqe77zibvlielr.jpg]: http://www.apkbus.com/data/attachment/album/201211/14/171825llhqe77zibvlielr.jpg
[171254m99nx3vjuqrl9elm.png]: http://www.apkbus.com/data/attachment/album/201211/14/171254m99nx3vjuqrl9elm.png