Android文档说“不能通过非UI线程更新UI”,但是在进度条的情况下,不会引发异常。我的进度栏正在由非ui(原始线程)更新。但是,在其他小部件的情况下,我会得到例外。我只想澄清为什么发生这种情况(不应该发生)!这是我的代码:
public class Mainactivity extends AppCompatactivity {
ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar=findViewById(R.id.progress_bar);
MyThread thread=new MyThread();
thread.start();
}
public class MyThread extends Thread{
@Override
public void run() {
super.run();
int i=0;
while(i<=100){
i++;
progressBar.setProgress(i);
try
{
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}