Android中检测字符编码（GB2312,ASCII,UTF8,UNICODE，TOTAL——ENCODINGS)方法（二）

Intent intent = getIntent();

        String contentUri = null;

        Uri uri =null;

        if (intent.getData() != null) {

            uri = intent.getData();

            contentUri = "file".equals(uri.getScheme())

                    ? FileContentProvider.BASE_URI + uri.getEncodedPath()

                    : uri.toString();

            String intentType = intent.getType();

            if (intentType != null) {

                contentUri += "?" + intentType;

            }

        }

        File mFile = new File(uri.getPath());

        InputStream mIn = null;

        try{

            Log.d(LOGTAG,"file is "+mFile);

            mIn = new FileInputStream(mFile);

            byte[]b = new byte[3];

            mIn.read(b);

            

            mIn.close();

            Log.d(LOGTAG,"B is "+b[0]+b[1]+b[2]);

            if (b[0]==-27||(b[0]==-17&&b[1]==-69&&b[2]==-65))  {

                s.setDefaultTextEncodingName("utf-8");//added by chenxuan for SWBUG00027593

             }

            else{

                s.setDefaultTextEncodingName("GBK");

                }

         }catch(FileNotFoundException e){

            Toast.makeText(this,R.string.file_inexistence,Toast.LENGTH_SHORT).show();

            finish();

            return;

         }catch(IOException ex){

            finish();

            Toast.makeText(this, R.string.read_file_failed,Toast.LENGTH_SHORT).show();

            return;

        }