Android_遍历SD卡所有文件

private static String TAG = "MainActivity";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//返回一个SD的文件
File path = Environment.getExternalStorageDirectory();
System.out.println(path.toString());
filePath(path);
}

//遍历SDcard的所有文件.
public void filePath(File file) {
if (file != null && file.exists() && file.isDirectory()) {
File[] files = file.listFiles();
for (File file2 : files) {
if (file2.listFiles() == null) {
String str = "文件名称:" + file2.getName() + " 路径:"+ file2.getPath();
System.out.println(str);
}else
filePath(file2);
}
} else
System.out.println("文件不存在......");
}