1: entry: onStart---->onResume---->onAttachedToWindow----------->onWindowVisibilityChanged--visibility=0---------->onWindowFocusChanged(true)------->1: entry: onStart---->onResume---->onAtta
1: entry: onStart---->onResume---->onAttachedToWindow----------->onWindowVisibilityChanged--visibility=0---------->onWindowFocusChanged(true)------->1: entry: onStart---->onResume---->onAtta