Android，布局（layout）转化成bitmap，再生成文件

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如果布局文件没有超出屏幕高度的话的做法：

 private Bitmap getViewBitmap(View v) {
        v.clearFocus();
        v.setPressed(false);
        boolean willNotCache = v.willNotCacheDrawing();
        v.setWillNotCacheDrawing(false);
        int color = v.getDrawingCacheBackgroundColor();
        v.setDrawingCacheBackgroundColor(0);
        if (color != 0) {
            v.destroyDrawingCache();
        }
        v.buildDrawingCache();
        Bitmap cacheBitmap = v.getDrawingCache();
        if (cacheBitmap == null) {
            return null;
        }
        Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
        v.destroyDrawingCache();
        v.setWillNotCacheDrawing(willNotCache);
        v.setDrawingCacheBackgroundColor(color);
        return bitmap;
    }

如果布局超出了屏幕的高度，则用Scrollview处理：

  public static Bitmap getBitmapByView(ScrollView scrollView) {
        int h = 0;
        Bitmap bitmap = null;
        for (int i = 0; i < scrollView.getChildCount(); i++) {
            h += scrollView.getChildAt(i).getHeight();
        }
        bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
                Bitmap.Config.RGB_565);
        final Canvas canvas = new Canvas(bitmap);
        scrollView.draw(canvas);
        return bitmap;
    }

以上两种方法则可以满足layout生成bitmap，然后bitmap可以再生成图片

 public static void savePhotoToSDCard(Bitmap photoBitmap, String path, String photoName) {
        if (checkSDCardAvailable()) {
            File dir = new File(path);
            if (!dir.exists()) {
                dir.mkdirs();
            }

            File photoFile = new File(path, photoName + ".png");
            FileOutputStream fileOutputStream = null;
            try {
                fileOutputStream = new FileOutputStream(photoFile);
                if (photoBitmap != null) {
                    if (photoBitmap.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream)) {
                        fileOutputStream.flush();
                    }
                }
            } catch (FileNotFoundException e) {
                photoFile.delete();
                e.printStackTrace();
            } catch (IOException e) {
                photoFile.delete();
                e.printStackTrace();
            } finally {
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

检查是否有SD卡

  public static boolean checkSDCardAvailable() {
        return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
    }

用例：

 Bitmap bitmap = getBitmapByView(contentLly);//contentLly是布局文件                   
 ImageUtils.savePhotoToSDCard(bitmap, "/sdcard/test", "test");