android File文件保存和读取

public class AchieveResourceFile {

    private static String filename = "myfile";//文件名字

    private static String string = "Hello world!";//存的的内容

    public static void writeFile(Context context) {

        //调用openFileOutput()获取FileOutputStream写入文件到内部目录

        FileOutputStream outputStream;

        try {

            outputStream = context.openFileOutput(filename, context.MODE_PRIVATE);

            outputStream.write(string.getBytes());

            outputStream.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    public static void readFile (Context context){

        FileInputStream inputStream;

        try {

            inputStream = context.openFileInput(filename);

            int length = inputStream.available();

            byte [] buffer = new byte[length];

            inputStream.read(buffer);

            string = EncodingUtils.getString(buffer, "UTF-8");

            inputStream.close();

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}