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，並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：

1. /**
2. * 獲取和保存當前屏幕的截圖
3. */
4. private void GetandSaveCurrentImage()
5. {
6. //1.構建Bitmap
7. WindowManager windowManager = getWindowManager();
8. Display display = windowManager.getDefaultDisplay();
9. int w = display.getWidth();
10. int h = display.getHeight();
12. Bitmap Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 );
14. //2.獲取屏幕
15. View decorview = this.getWindow().getDecorView();
16. decorview.setDrawingCacheEnabled(true);
17. Bmp = decorview.getDrawingCache();
19. String SavePath = getSDCardPath()+"/AndyDemo/ScreenImage";
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. }
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();
41. Toast.makeText(mContext, "截屏文件已保存至SDCard/AndyDemo/ScreenImage/下", Toast.LENGTH_LONG).show();
42. }
44. } catch (Exception e) {
45. e.printStackTrace();
46. }
47. }
49. /**
50. * 獲取SDCard的目錄路徑功能
51. * @return
52. */
53. private String getSDCardPath(){
54. File sdcardDir = null;
55. //判斷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. }

由於要對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：

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