这是一个比较简单的问题，但是也是我们经常回遇到的问题，就是在Android的开发过程中，如何将内存卡的图片或者其他的文件转存，然后对这个文件进行处理，因为我们不能对原文件进行处理，最近正在做图片方面的android项目，所以用到了这方面的知识，就和大家分享一下吧。

private void string2File() {
		tempFiles = new File[resultFileList.size()];
		passFileMap = new HashMap<String, File>();
		for (int i = 0; i < resultFileList.size(); ++i) {
			String name = resultFileList.get(i).substring(
					resultFileList.get(i).lastIndexOf("/") + 1);
			name = getCacheDir(mContext) + "/" + name;
			File file = new File(resultFileList.get(i));
			tempFiles[i] = new File(name);
			Uri uri = Uri.fromFile(tempFiles[i]);
			try {
				Bitmap bitmap = decodeFile(file, 1000);
				if (!tempFiles[i].exists()) {
					tempFiles[i].createNewFile();
				}
				FileOutputStream out = new FileOutputStream(tempFiles[i]);
				bitmap.compress(Bitmap.CompressFormat.JPEG, 60, out);
				out.flush();
				out.close();
				passFileMap.put(tempFiles[i].getAbsolutePath(), tempFiles[i]);
				// tempFiles[i].delete();
			} catch (Exception e) {
				// TODO: handle exception
			}

		}
	}

	private Bitmap decodeFile(File f, int bmpsize) {
		if (f == null || !f.exists())
			return null;

		try {
			BitmapFactory.Options o = new BitmapFactory.Options();
			o.inJustDecodeBounds = true;
			o.inPreferredConfig = Bitmap.Config.ARGB_8888;
			o.inInputShareable = true;
			o.inPurgeable = true;
			BitmapFactory.decodeStream(new FileInputStream(f), null, o);
			final int REQUIRED_SIZE = bmpsize;
			int width_tmp = o.outWidth, height_tmp = o.outHeight;
			int scale = 1;
			if (width_tmp > REQUIRED_SIZE || height_tmp > REQUIRED_SIZE) {
				if (width_tmp > height_tmp) {
					scale = width_tmp / REQUIRED_SIZE;
				} else {
					scale = height_tmp / REQUIRED_SIZE;
				}
			}
			// decode with inSampleSize

			BitmapFactory.Options o2 = new BitmapFactory.Options();

			o2.inSampleSize = scale;
			o2.inPreferredConfig = Bitmap.Config.ARGB_8888;
			o2.inInputShareable = true;
			o2.inPurgeable = true;

			Bitmap bmp = BitmapFactory.decodeStream(new FileInputStream(f),
					null, o2);
			return bmp;
		} catch (FileNotFoundException e) {

		}

		return null;

	}

这种情况在处理本地图片的压缩中非常常见，希望能够给大家一点启示吧。

android把内存卡中的图片或者其他的文件转存在其他的路径中