Bitmap File path 转换 保存

2019-04-15 16:50发布


public void saveBitmapFile(Bitmap bitmap){ File file=new File(ContactService.getImageURI(Environment.getExternalStorageDirectory()+"/pic/01.jpg");//将要保存图片的路径 try { BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file)); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos); bos.flush(); bos.close(); } catch (IOException e) { e.printStackTrace(); } }


/* * 从网络上获取图片,如果图片在本地存在的话就直接拿,如果不存在再去服务器上下载图片 * 这里的path是图片的地址 */ public static Uri getImageURI(String localPath, String path) throws Exception { File file = new File(localPath); // 如果图片存在本地缓存目录,则不去服务器下载 if (file.exists()) { return Uri.fromFile(file);//Uri.fromFile(path)这个方法能得到文件的URI } else { // 从网络上获取图片 URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setConnectTimeout(5000); conn.setRequestMethod("GET"); conn.setDoInput(true); if (conn.getResponseCode() == 200) { InputStream is = conn.getInputStream(); FileOutputStream fos = new FileOutputStream(file); byte[] buffer = new byte[1024]; int len = 0; while ((len = is.read(buffer)) != -1) { fos.write(buffer, 0, len); } is.close(); fos.close(); // 返回一个URI对象 return Uri.fromFile(file); } } return null; }

//BitmapFactory.方法中很多生成bitmap的方法 BitmapFactory.decodeFile(filePath, options);