复制数据库到手机

        /**
	 * 复制数据库到手机，数据库在assets目录下
	 */
	private void copyDatabase(String dataBaseName) {
		// /data/data/包名/files/address.db
		File file = new File(getFilesDir(), dataBaseName);
		BufferedInputStream bis = null;
		BufferedOutputStream bos = null;
		if (!file.exists()) {
			// 复制数据库
			// 获取读取流
			AssetManager manager = getAssets();
			try {
				bis = new BufferedInputStream(manager.open(dataBaseName));
				bos = new BufferedOutputStream(new FileOutputStream(file));

				int len = -1;
				byte[] buffer = new byte[1024 * 4];
				while ((len = bis.read(buffer)) != -1) {
					bos.write(buffer, 0, len);
				}
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				if (bis != null) {
					try {
						bis.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
				if (bos != null) {
					try {
						bos.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
		}
	}