Android中截取當前屏幕的功能

   該篇文章是說明在Android手機或平板電腦中如何實現截取當前屏幕的功能，并把截取的屏幕保存到SDCard中的某個目錄文件夾下面。實現的代碼如下：

   /**


 * 獲取和保存當前屏幕的截圖
 */
private void GetandSaveCurrentImage()  
{  
    //1.構建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.獲取屏幕  
    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();  
    }  
}  

/**
 * 獲取SDCard的目錄路徑功能
 * @return
 */
private String getSDCardPath(){
    File sdcardDir = null;
    //判斷SDCard是否存在
    boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
    if(sdcardExist){
        sdcardDir = Environment.getExternalStorageDirectory();
    }
    return sdcardDir.toString();
}</pre>由于要對SDCard進行操作，所以別忘記了在manifest.xml文件中賦以對SDCard的讀寫權限：<pre class="brush:xml; toolbar: true; auto-links: false;"><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/></pre>