原文:zhangxiaowei
总结:
1.Activity的runOnUiThread()和 View.post(Runnable r)在本质上都是调用Handler的post()方法处理;
2.在子线程中直接更新UI,可以使用 Handler的post(),Activity的runOnUiThread()和 View.post(Runnable r)这三种方法。
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| private void updateUiByHandler() {
new Thread() { @Override public void run() { try { Thread.sleep(2 * 1000); } catch (InterruptedException e) { e.printStackTrace(); } Message message = new Message();//mMyHandler.obtainMessage() message.what = MSG_WHAT; message.obj = "来自子线程的数据"; mMyHandler.sendMessage(message); } }.start(); }
private void updateUiByHandlerPost() { new Thread() { @Override public void run() { try { Thread.sleep(2 * 1000); } catch (InterruptedException e) { e.printStackTrace(); } mMyHandler.post(new Runnable() { @Override public void run() { tv.setText(" Handler.post更新UI"); } }); } }.start(); }
private void updateUiByRunOnUiThread(){ new Thread(){ @Override public void run() { try { Thread.sleep(2*1000); } catch (InterruptedException e) { e.printStackTrace(); } runOnUiThread(new Runnable() { @Override public void run() { tv.setText("runOnUiThread更新UI"); } }); } }.start(); }
private void updateUiByViewPost(){ new Thread(){ @Override public void run() { super.run(); tv.post(new Runnable() { @Override public void run() { tv.setText("view post更新UI"); } }); } }.start(); }
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参考阅读
Android 源码解析Handler处理机制(一)
Android 源码解析Handler处理机制(二)
你不知道的Runnable接口,深度解析Runnable接口
Android 源码解析AsyncTask(一)
Android 源码解析AsyncTask(二)