在我的OnCreate方法中,我创建了一个线程来监听收到的消息！
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this article,但它并没有为我工作,没有运气！
解决方法
在Android应用程序中对UI的任何更新都必须在UI线程中进行.如果您在后台生成线程来进行工作,则必须在触摸视图之前将结果编组回UI线程.您可以使用Handler类执行编组：
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);
}
});
}
AsyncTask类简化了很多细节,也是您可以查看的内容.例如,我相信它为您提供了一个线程池,以帮助减轻每次想做背景工作时产生新线程所需的一些成本.
