android studio 线程安全Only the original thread that created a view hierarchy can touch its views

在加载bitmap时遇到系统线程报错，通过参考https://developer.android.com/guide/components/processes-and-threads.html#Processes

解决了问题，代码：

public static void setPic(final ImageView ivPic, final String pic_url){    new Thread(new Runnable() {        @Override        public void run() {            try {                HttpURLConnection urlConnection=(HttpURLConnection)new URL(pic_url).openConnection();                urlConnection.connect();                InputStream is=urlConnection.getInputStream();                final Bitmap bitmap= BitmapFactory.decodeStream(is);                ivPic.post(new Runnable() {                    @Override                    public void run() {                        ivPic.setImageBitmap(bitmap);                    }                });                is.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }).start();