Android 建立文件夹、生成文件并写入文本文件内容

一、首先添加权限

1	`"android.permission.WRITE_EXTERNAL_STORAGE" >`

二、建立文件夹、生成文件并写入文本文件内容代码

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 private void initData() { String filePath = "/sdcard/Test/" ; String fileName = "log.txt" ; writeTxtToFile( "txt content" , filePath, fileName); } // 将字符串写入到文本文件中 public void writeTxtToFile(String strcontent, String filePath, String fileName) { //生成文件夹之后，再生成文件，不然会出错 makeFilePath(filePath, fileName); String strFilePath = filePath+fileName; // 每次写入时，都换行写 String strContent = strcontent + "\r\n" ; try { File file = new File(strFilePath); if (!file.exists()) { Log.d( "TestFile" , "Create the file:" + strFilePath); file.getParentFile().mkdirs(); file.createNewFile(); } RandomAccessFile raf = new RandomAccessFile(file, "rwd" ); raf.seek(file.length()); raf.write(strContent.getBytes()); raf.close(); } catch (Exception e) { Log.e( "TestFile" , "Error on write File:" + e); } } // 生成文件 public File makeFilePath(String filePath, String fileName) { File file = null ; makeRootDirectory(filePath); try { file = new File(filePath + fileName); if (!file.exists()) { file.createNewFile(); } } catch (Exception e) { e.printStackTrace(); } return file; } // 生成文件夹 public static void makeRootDirectory(String filePath) { File file = null ; try { file = new File(filePath); if (!file.exists()) { file.mkdir(); } } catch (Exception e) { Log.i( "error:" , e+ "" ); } }

更多相关文章

随机推荐