在android中写入文本文件

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

try {
    String filename = "myfile.txt"; // 文件名
    String content = "Hello, World!"; // 要写入的内容

    File file = new File(Environment.getExternalStorageDirectory(), filename);
    FileOutputStream fos = new FileOutputStream(file);
    fos.write(content.getBytes());
    fos.close();

    // 写入成功
} catch (IOException e) {
    e.printStackTrace();
    // 写入失败
}

try {
    String filename = "myfile.txt"; // 文件名
    String content = "Hello, World!"; // 要写入的内容

    FileOutputStream fos = openFileOutput(filename, Context.MODE_PRIVATE);
    fos.write(content.getBytes());
    fos.close();

    // 写入成功
} catch (IOException e) {
    e.printStackTrace();
    // 写入失败
}