流啊流 根目录建文件

OutputStream
FileOutputStream

OutputStream
FileterOutputStream
PrintStream(OutputStream out)//包转节点流

textView = findViewById(R.id.text_id);
File file = new File("/storage/emulated/0/babb.txt");//在目录下创建文件需要完整路径
try {
// FileInputStream fileInputStream = this.openFileInput(“aaa”);
// file.getParentFile().mkdirs();
file.createNewFile();
// FileOutputStream fileOutputStream = this.openFileOutput(“bbb.txt”, MODE_PRIVATE);
textView.setText(file.getPath());
} catch (Exception e) {
Log.e(“tag”, “文件未找到”);
}