Android-读取本地文本，把Base64 datastring转换为图片

来源：互联网发布：ping命令使用的端口号编辑：程序博客网时间：2024/05/08 14:40
         String path="storage/sdcard0/a.jpg";         Bitmap b= BitmapFactory.decodeFile(path);         ByteArrayOutputStream out = null;         try {             out = new ByteArrayOutputStream();                 b.compress(Bitmap.CompressFormat.JPEG, 100, out);             out.flush();             out.close();             byte[] imgBytes = out.toByteArray();             String b64=Base64.encodeToString(imgBytes, Base64.CRLF);         System.out.println(b64);         RandomAccessFile raf = new RandomAccessFile(mFile, "rw");         raf.seek(mFile.length());         raf.write(b64.getBytes());         raf.close();         } catch (Exception e) {         // TODO Auto-generated catch block         } finally {         try {         out.flush();         out.close();         } catch (IOException e) {         // TODO Auto-generated catch block         e.printStackTrace();         }         }---------------------------------------------------------------------------- String  sdPath=Environment.getExternalStorageDirectory().toString();        StringBuffer sb = new StringBuffer();        File file = new File(sdPath+"/base64.txt");        try {            FileInputStream fis = new FileInputStream(file);            int c;            while ((c = fis.read()) != -1) {                sb.append((char) c);            }            fis.close();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        //--------------------转换分割线-------------------------------------        byte[] bytes = Base64.decode(sb.toString(), Base64.DEFAULT);        Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);        File newFile = new File(sdPath, "new.jpg");        if (!newFile.exists()) {            try {                newFile.createNewFile();                FileOutputStream o = new FileOutputStream(newFile);                if (bitmap.compress(Bitmap.CompressFormat.JPEG, 100, o)) {                    Toast.makeText(this, "转换成功", Toast.LENGTH_SHORT).show();                } else {                    Toast.makeText(this, "转换失败", Toast.LENGTH_SHORT).show();                }            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }
0 0