Android(安卓)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

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

二、建立文件夹、生成文件并写入文本文件内容代码

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+"");}}

三、效果图

1、文件夹

2、生成的文本文件log.txt内容

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