方法一：

可以在Androidmainfest 里面的application添加

android:requestLegacyExternalStorage="true"

使用原來的存儲方式獲取路徑：

Environment.getExternalStorageDirectory()

方法二：

public String getPath(Context context) {
    File dir = null;
    boolean state = Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED );
    if (state) {
        if (Build.VERSION.SDK_INT >= 29) {
            //Android10之后
            dir = context.getExternalFilesDir( null );
        } else {
            dir = Environment.getExternalStorageDirectory();
        }
    } else {
        dir = Environment.getRootDirectory();
    }
    return dir.toString();
}