使用 setText 更改文本后如何更新屏幕?

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现在我正在使用以下代码来更新 TextView

Right now I am using the following code to update a TextView

txtMain.setText("new text");

执行该代码后，屏幕不会更新为新文本.有没有办法可以强制文本立即更新?

After that code executes, the screen does not update with the new text. Is there a way I can force the text to update right then and there?

推荐答案

执行该代码后，屏幕不会更新为新文本

After that code executes, the screen does not update with the new text

一旦您将控制权交还给 Android，它就应该如此.

It should, once you return control to Android.

例如，假设您尝试在 setText() 调用后立即执行 Thread.sleep(5000);.文本不会出现在屏幕上，因为 Android 的主应用线程被困在睡眠中，无法重绘屏幕.

Suppose, for example, you tried doing a Thread.sleep(5000); immediately after the setText() call. The text will not appear on the screen, because Android's main application thread is tied up sleeping and cannot redraw the screen.

因此，请确保从您所在的任何回调中返回 (onCreate()、onClick()、onListItemClick()，等)，Android 应立即更新屏幕.

So, make sure that you return from whatever callback you are in (onCreate(), onClick(), onListItemClick(), etc.), and Android should update the screen momentarily.