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首页 / 操作系统 / Linux / Android中读取中文字符的文件与文件读取相关

一、如何显示assets/license.txt(中文)的内容?(1)方法1:InputStream.available()得到字节数,然后一次读取完。private String readUserAgreementFromAsset(String assetName) {String content ="";try {InputStream is= getAssets().open(assetName);if (is != null){DataInputStream dIs = newDataInputStream(is);intlength = dIs.available();byte[] buffer = new byte[length];dIs.read(buffer);content= EncodingUtils.getString(buffer, "UTF-8");is.close();}} catch (IOException e) {e.printStackTrace();}return content;}(2)方法2:用BufferedReader.readLine()行读取再加换行符,最后用StringBuilder.append()连接成字符串。A.以下是先行读取再转码UTF8:private String readUserAgreementFromAsset(String assetName) {StringBuilder sb = newStringBuilder("");String content ="";try {InputStream is= getAssets().open(assetName);if (is != null){BufferedReader d = newBufferedReader(new InputStreamReader(is));while (d.ready()) {sb.append(d.readLine() +" ");}content =EncodingUtils.getString(sb.toString().getBytes(), "UTF-8");is.close();}} catch (IOException e) {e.printStackTrace();}return content;}B.以下是InputStreamReader先指定以UTF8读取文件,再进行读取读取操作:private String readUserAgreementFromAsset(String assetName) {StringBuilder sb = newStringBuilder("");String content ="";try {InputStream is= getAssets().open(assetName);if (is != null){BufferedReaderd = new BufferedReader(new InputStreamReader(is, "UTF-8"));while(d.ready()) {sb.append(d.readLine() +" ");}content= sb.toString();is.close();}} catch (IOException e) {e.printStackTrace();}return content;}另外,UTF8转码也可以用new String(buffer, “utf-8”)。(3)替代方法3:将license.txt内容作为string.xml的string,如:<stringname="license_content">用户协议 一、服务条款的确认和接纳 …</string>需要注意的是:string里需要加 作为换行符,原来txt里的换行符在取得string后无效。不可取方法4:每次读取4096字节,以UTF8转码,最后连接字符串。因为汉字可能被截断,导致4096的倍数附近的中文可能出现乱码。private String readUserAgreementFromAsset(String assetName) {StringBuilder sb = newStringBuilder("");String content =""; try {InputStream is= getAssets().open(assetName);if (is != null){DataInputStream dIs = new DataInputStream(is);byte[] buffer = new byte[1024*4];int length = 0;while ((length = dIs.read(buffer)) >0) {content =EncodingUtils.getString(buffer, 0, length, "UTF-8");sb.append(content);}is.close();}} catch (IOException e) {e.printStackTrace();}return sb.toString();}http://www.2cto.com/kf/201207/140312.htmlhttp://blog.sina.com.cn/s/blog_933d50ba0100wq1h.html 二、Android中读写文件(1) 从resource中的raw文件夹中获取文件并读取数据(资源文件只能读不能写, es aw est.txt)String res = ""; try{ InputStream in = getResources().openRawResource(R.raw.test);int length = in.available();byte [] buffer = newbyte[length];in.read(buffer);res = EncodingUtils.getString(buffer,"UTF-8");//选择合适的编码,如果不调整会乱码in.close();}catch(Exception e){e.printStackTrace();}(2) 从asset中获取文件并读取数据(资源文件只能读不能写,assets est.txt)与raw文件夹类似,只是:InputStream is = getAssets().open(“test.txt”);(3) 私有文件夹下的文件存取(/data/data/包名/files/test.txt)使用openFileOutput写文件:public void writeFileData(String fileName,String message){try{FileOutputStream fout =openFileOutput(fileName,MODE_PRIVATE);byte [] bytes =message.getBytes();fout.write(bytes);fout.close();}catch(Exception e){e.printStackTrace();}}使用openFileInput读文件:public String readFileData(String fileName){String str = “”;try{FileInputStream fin =openFileInput(fileName);int length = in.available();byte [] bytes = newbyte[length];fin.read(bytes);str = EncodingUtils.getString(bytes,"UTF-8");fin.close();}catch(Exception e){e.printStackTrace();}return str;}(4) sdcard目录下的文件存取(/mnt/sdcard/)使用FileOutputStream写文件:public void writeFile2Sdcard(String fileName,String message){try{FileOutputStream fout = new FileOutputStream(fileName);byte [] bytes =message.getBytes();fout.write(bytes);fout.close();}catch(Exception e){e.printStackTrace();}}使用FileInputStream读文件:public String readFileFromSdcard(String fileName){String res="";try{FileInputStream fin = newFileInputStream(fileName);int length =fin.available();byte [] buffer = newbyte[length];fin.read(buffer);res =EncodingUtils.getString(buffer, "UTF-8");fin.close();}catch(Exception e){e.printStackTrace();}return res;}更多Android相关信息见Android 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=11