Android中截取当前屏幕的功能

该篇文章是说明在Android手机或平板电脑中如何实现截取当前屏幕的功能，并把截取的屏幕保存到SDCard中的某个目录文件夹下面。实现的代码如下：

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1. /** 
2. * 获取和保存当前屏幕的截图 
3. */ 
4. private void GetandSaveCurrentImage()   
5. {   
6.     //1.构建Bitmap   
7.     WindowManager windowManager =getWindowManager();   
8.     Display display = windowManager.getDefaultDisplay();   
9.     int w = display.getWidth();   
10.     int h = display.getHeight();   
11.        
12.     Bitmap Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 );       
13.        
14.     //2.获取屏幕   
15.     View decorview = this.getWindow().getDecorView();    
16.     decorview.setDrawingCacheEnabled(true);    
17.     Bmp = decorview.getDrawingCache();    
18.      
19.     String SavePath = getSDCardPath()+"/AndyDemo/ScreenImage"; 
20.    
21.     //3.保存Bitmap    
22.     try {   
23.         File path = new File(SavePath);   
24.         //文件   
25.         String filepath =SavePath + "/Screen_1.png";   
26.         File file = new File(filepath);   
27.         if(!path.exists()){   
28.             path.mkdirs();   
29.         }   
30.         if (!file.exists()) {   
31.             file.createNewFile();   
32.         }   
33.            
34.         FileOutputStream fos = null;   
35.         fos = new FileOutputStream(file);   
36.         if (null != fos) {   
37.             Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos);   
38.             fos.flush();   
39.             fos.close();     
40.                
41.             Toast.makeText(mContext, "截屏文件已保存至SDCard/AndyDemo/ScreenImage/下", Toast.LENGTH_LONG).show();   
42.         }   
43.    
44.     } catch (Exception e) {   
45.         e.printStackTrace();   
46.     }   
47. }   
48.  
49.    /** 
50.     * 获取SDCard的目录路径功能 
51.     * @return 
52.     */ 
53. private String getSDCardPath(){ 
54.     File sdcardDir = null; 
55.     //判断SDCard是否存在 
56.     boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED); 
57.     if(sdcardExist){ 
58.         sdcardDir = Environment.getExternalStorageDirectory(); 
59.     } 
60.     return sdcardDir.toString(); 
61. } 

/** * 获取和保存当前屏幕的截图 */private void GetandSaveCurrentImage() { //1.构建Bitmap WindowManager windowManager = getWindowManager(); Display display = windowManager.getDefaultDisplay(); int w = display.getWidth(); int h = display.getHeight(); Bitmap Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 ); //2.获取屏幕 View decorview = this.getWindow().getDecorView(); decorview.setDrawingCacheEnabled(true); Bmp = decorview.getDrawingCache(); String SavePath = getSDCardPath()+"/AndyDemo/ScreenImage"; //3.保存Bitmap try { File path = new File(SavePath); //文件 String filepath = SavePath + "/Screen_1.png"; File file = new File(filepath); if(!path.exists()){ path.mkdirs(); } if (!file.exists()) { file.createNewFile(); } FileOutputStream fos = null; fos = new FileOutputStream(file); if (null != fos) { Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos); fos.flush(); fos.close(); Toast.makeText(mContext, "截屏文件已保存至SDCard/AndyDemo/ScreenImage/下", Toast.LENGTH_LONG).show(); } } catch (Exception e) { e.printStackTrace(); } } /** * 获取SDCard的目录路径功能 * @return */private String getSDCardPath(){File sdcardDir = null;//判断SDCard是否存在boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);if(sdcardExist){sdcardDir = Environment.getExternalStorageDirectory();}return sdcardDir.toString();}

由于要对SDCard进行操作，所以别忘记了在manifest.xml文件中赋以对SDCard的读写权限：

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1. <uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/