Android(安卓)- 文件读写操作总结

Android - 文件读写操作总结
http://blog.csdn.net/ztp800201/article/details/7322110

android的文件操作。（未整理完成）
http://blog.csdn.net/fenghome/article/details/5668598

Android 异常处理：java.lang.IllegalArgumentException(...contains a path separator)
http://blog.csdn.net/alex_zhuang/article/details/7340901

//Test in main()String fileName = "/data/data/com.example.fileoperation/files/test.txt";String str = "This is for test string";readFileData(fileName);writeFileData(fileName, str);// read file input streamFile file = new File("/data/data/com.example.fileoperation/test.txt");FileInputStream fin = new FileInputStream(file);// code above is equivalent to below:/* Android Activity独有的方法，读写文件进程序自己目录下的files文件夹，若文件不存在，则自动创建之;如我的程序在：/data/data/com.example.fileoperation， 则test.txt文件在：/data/data/com.example.fileoperation/files/test.txt*/ FileInputStream fin = openFileInput(fileName);  // write file output streamFile file = new File("/data/data/com.example.fileoperation/test.txt");FileOutputStream fout = new FileOutputStream(file);// code above is equivalent to below:FileOutputStream fout = openFileOutput(fileName, MODE_PRIVATE);

读写SD卡：

String fileName = "/sdcard/test.txt";
//也可以用String fileName = "mnt/sdcard/test.txt";

// write SDCard    private void writeFileSdcardFile(String fileName, String writeStr) throws IOException {        try {                        FileOutputStream fout = new FileOutputStream(fileName);            byte[] bytes = writeStr.getBytes();                        fout.write(bytes);            fout.close();                    } catch (Exception e) {            e.printStackTrace();        }    }        //    read SDCard    private String readFileSdcardFile(String fileName) throws IOException {        String res = "";        try {                        FileInputStream fin = new FileInputStream(fileName);            int length = fin.available();                        byte[] buffer = new byte[length];            fin.read(buffer);                        res = EncodingUtils.getString(buffer, "UTF-8");                        fin.close();                    } catch (Exception e) {            e.printStackTrace();        }        return res;    }

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