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：

/**
 
* 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：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>