blocks|key|713144|text|只能修改UI线程中的视图，需要使用Handler，例如，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|713145|Handler+h+=+new+Handler(context.getMainLooper())+{
++++public+void+handleMessage(Message+msg)+{
++++++++TextView+loog+=+(TextView)findViewById(R.id.textView1);
++++++++loog.setText(msg.obj);
++++}
};

Thread+ThreadRecording+=+new+Thread(new+Runnable()+{
++++public+void+run()+{
++++++++while(recorder)
++++++++{
++++++++++++if+(body_num+=+10)
++++++++++++{
++++++++++++++++Message+message+=+new+Message();
++++++++++++++++message.obj+=+"Total+:+10,+Thank+you";
++++++++++++++++handler.sendMessage(message);
++++++++++++}
++++++++}
++++}
});
ThreadRecording.start();|code-block|syntax|javascript|713146|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can only modify views in UI thread, you need to use Handler, such as,

<pre><code>Handler h = new Handler(context.getMainLooper()) {
 public void handleMessage(Message msg) {
 TextView loog = (TextView)findViewById(R.id.textView1);
 loog.setText(msg.obj);
 }
};

Thread ThreadRecording = new Thread(new Runnable() {
 public void run() {
 while(recorder)
 {
 if (body_num = 10)
 {
 Message message = new Message();
 message.obj = "Total : 10, Thank you";
 handler.sendMessage(message);
 }
 }
 }
});
ThreadRecording.start();
</code></pre>

blocks|key|501978|text|只有创建视图层次结构的原始线程才能触摸其视图。
|type|blockquote|depth|inlineStyleRanges|entityRanges|data|501979|unstyled|501980|因为只有在UI+(主)线程中，您才能操纵视图。您可以使用Hanlder更新视图。|501981|Handler有两个主要用途：|501982|将消息和运行表安排为将来某个时间点执行；以及|ordered-list-item|501983|将要在与您自己的线程不同的线程上执行的操作排队。当为应用程序创建进程时，其主线程专用于运行消息队列，负责管理顶级应用程序对象(活动、广播接收器等)及其创建的任何窗口。您可以创建自己的线程，并通过Handler与主应用程序线程进行通信。这是通过调用与前面相同的post或sendMessage方法来完成的，但是是从新线程调用的。然后，给定的可运行或消息将在Handler的消息队列中进行调度，并在适当时进行处理。“
--来自"developer.android.com“|501984|501985|501986|示例：|offset|length|style|BOLD|501987|背景线程：|501988|new+Thread()+{

public+void+run()+{
++++while(recorder)
++++++++{
++++++++++++if+(body_num+=+10)
++++++++++++{++++++++++++++++
++++++++++++++++messageHandler.sendEmptyMessage(0);
++++++++++++}
++++++++}
+++}

}.start();|code-block|syntax|javascript|501989|您的处理程序放在主线程中：|501990|private+Handler+messageHandler+=+new+Handler()+{

public+void+handleMessage(Message+msg)+{
+++++++++++++//update+your+view+here
+++}
};|501991|entityMap^0|0|0|0|0|0|0|0|0|0|3|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|-4|5|C|7|18|8|@]|9|@]|A|$]]|$1|D|3|E|5|C|7|19|8|@]|9|@]|A|$]]|$1|F|3|G|5|C|7|1A|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1B|8|@]|9|@]|A|$]]|$1|K|3|L|5|J|7|1C|8|@]|9|@]|A|$]]|$1|M|3|-4|5|C|7|1D|8|@]|9|@]|A|$]]|$1|N|3|-4|5|C|7|1E|8|@]|9|@]|A|$]]|$1|O|3|P|5|C|7|1F|8|@$Q|1G|R|1H|S|T]]|9|@]|A|$]]|$1|U|3|V|5|C|7|1I|8|@]|9|@]|A|$]]|$1|W|3|X|5|Y|7|1J|8|@]|9|@]|A|$Z|10]]|$1|11|3|12|5|C|7|1K|8|@]|9|@]|A|$]]|$1|13|3|14|5|Y|7|1L|8|@]|9|@]|A|$Z|10]]|$1|15|3|-4|5|C|7|1M|8|@]|9|@]|A|$]]]|16|$]]

<blockquote>
 Only the original thread that created a view hierarchy can touch its views
</blockquote>

Because just only with UI (main) thread, are you able to manipulate views. You can use Hanlder to update your views. 

There are two main uses for a Handler:

<ol>
<li>To schedule messages and runnables to be executed as some point in the future; and </li>
<li>To enqueue an action to be performed on a different thread than your own. When a process is created for your application, its main thread is dedicated to running a message queue that takes care of managing the top-level application objects (activities, broadcast receivers, etc) and any windows they create. You can create your own threads, and communicate back with the main application thread through a Handler. This is done by calling the same post or sendMessage methods as before, but from your new thread. The given Runnable or Message will then be scheduled in the Handler's message queue and processed when appropriate." 
-- from "developer.android.com"</li>
</ol>

Example:

Backgroud thread:

<pre><code>new Thread() {

public void run() {
 while(recorder)
 {
 if (body_num = 10)
 { 
 messageHandler.sendEmptyMessage(0);
 }
 }
 }

}.start();
</code></pre>

Your handler which is put in main thread:

<pre><code>private Handler messageHandler = new Handler() {

public void handleMessage(Message msg) {
 //update your view here
 }
};
</code></pre>

blocks|key|713194|text|这也可以通过使用AsyncTask来实现。下面是在R.string.your_text中设置字符串资源(TextView)的示例代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|713195|public+class+CommonSetText+extends+AsyncTask<Void,+Void,+Integer>+{
private+WeakReference<TextView>+textView;
private+int+stringID;

public+CommonSetText+(+TextView+textView,+Integer+stringID)+{
++++this.textView+=+new+WeakReference<>(textView);
++++this.stringID+=+stringID;
}

@Override
protected+Integer+doInBackground+(+Void...+voids+)+{
++++return+stringID;
}

@Override
protected+void+onPostExecute+(+Integer+stringID+)+{
++++super.onPostExecute+(+stringID+);
++++textView.get+().setText+(+stringID+);
}
}|code-block|syntax|javascript|713196|然后使用以下代码将文本设置为text视图：|713197|new+CommonSetText+(+textView,+R.string.your_text+).execute+(++);|713198|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This can also be achieved by using a AsyncTask. Below is the example code by which a string resource (R.string.your_text) is set in a TextView:

<pre><code>public class CommonSetText extends AsyncTask&lt;Void, Void, Integer&gt; {
private WeakReference&lt;TextView&gt; textView;
private int stringID;

public CommonSetText ( TextView textView, Integer stringID) {
 this.textView = new WeakReference&lt;&gt;(textView);
 this.stringID = stringID;
}

@Override
protected Integer doInBackground ( Void... voids ) {
 return stringID;
}

@Override
protected void onPostExecute ( Integer stringID ) {
 super.onPostExecute ( stringID );
 textView.get ().setText ( stringID );
}
}
</code></pre>

And the text is then set to text view using the below code:

<pre><code>new CommonSetText ( textView, R.string.your_text ).execute ( );
</code></pre>

When I want to setText to a textView, the application force closes and gives me this error:

<blockquote>
 android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
</blockquote>

This is a part of my code :

<pre><code>Thread ThreadRecording = new Thread(new Runnable() {
 public void run() {
 while(recorder)
 {
 if (body_num = 10)
 {
 TextView loog = (TextView)findViewById(R.id.textView1);
 loog.setText("Total : 10, Thank you");
 }
 }
 }
});
ThreadRecording.start();
</code></pre>

There's a button; if the user clicks it, it calls a function to set <code>body_num = body_num + 1</code> and the thread checks if body_num == 10

Error with setText: "Only the original thread .. can touch its views"

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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当我想setText到textView时，应用程序强制关闭并给出以下错误：android.view.ViewRootImpl$CalledFromWrongThreadException:只有创建视图层次结构的原始线程才能触摸其视图。这是我代码的一部分：Thread ThreadRecording = new Thre...

问setText错误：“只有原始线程.才能触摸其视图”
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问setText错误：“只有原始线程.才能触摸其视图”EN