从线程更新的TextView！请帮忙！ [英] Update textView from thread! Please help!

问题描述

在我的OnCreate方法，我创建了一个线程监听传入的消息！ 主线程发送出去......。（无意义的讨论）

In my OnCreate method I have created a thread that listens to incoming message! Main thread is for sending out….(meaningless for this discussion)

In OnCreate() {

//Some code

myThread = new Thread() {

            @Override

            public void run() {

                receiveMyMessages();

            }
        };
myThread.start();

// Some code related to sending out by pressing button etc.

}

Then, receiveMyMessage() functions…

Public void receiveMyMessage()
{

//Receive the message and put it in String str;

str = receivedAllTheMessage();

// <<    here I want to be able to update this str to a textView. But, How?
}

我检查了这一点， <一href="http://www.helloandroid.com/tutorials/using-threads-and-progressdialog">http://www.helloandroid.com/tutorials/using-threads-and-progressdialog 但是，并没有为我工作，没有运气！

I checked this, http://www.helloandroid.com/tutorials/using-threads-and-progressdialog But, did not work for me, no luck!

如果你愿意回答，请更多的话回答，或明显的例子，我是新的！

If you are willing to reply, please reply in more words, or clear example, I am new!

推荐答案

任何更新UI的Andr​​oid应用程序必须发生在UI线程。如果你产生一个线程做的工作在后台，你必须元帅的结果返回给UI线程，你倒好查看之前。您可以使用处理程序类来执行编组：

Any updates to the UI in an Android application must happen in the UI thread. If you spawn a thread to do work in the background you must marshal the results back to the UI thread before you touch a View. You can use the Handler class to perform the marshaling:

public class TestActivity extends Activity {
    // Handler gets created on the UI-thread
    private Handler mHandler = new Handler();

    // This gets executed in a non-UI thread:
    public void receiveMyMessage() {
        final String str = receivedAllTheMessage();
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                // This gets executed on the UI thread so it can safely modify Views
                mTextView.setText(str);
            }
        });
}

在的AsyncTask 类简化了很多细节你也是东西你可以看看。例如，我相信它为您提供了一个线程池，以帮助减轻一些你想要做后台工作，每次产卵一个新的线程相关的成本。

The AsyncTask class simplifies a lot of the details for you and is also something you could look into. For example, I believe it provides you with a thread pool to help mitigate some of the cost associated with spawning a new thread each time you want to do background work.

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