仅在特定时间内显示错误文本？

Question

How can I display a setError() only for specific amount of time?

if(editText.getText().length()==0)   
   editText.setError("please input text");  

Can I make it disappear after some seconds?

Answer 1

考虑使用敬酒通知 。

Answer 2

Try this:

Use Handler, in the OnCreate method, to keep a reference back to the UI thread from Non ui thread, because as soon as we create a Thread, we get dropped of the Ui thread.. sorry for the inconvenience for the left out line in the previous post. Now it will work as u wanted

   Handler h;

    onCreate(......) {

    h = new Handler();

    ....
    ....

    }


        if(editText.getText().length()==0) {  
           editText.setError("please input text"); 
           new Thread (new Runnable() {
              public void run(){
                 try{
                    Thread.sleep(1000);

                    h.post(new Runnable() {

                      editText.setText("");    // this will put the non-ui work on the ui thread back

                  }
                 }catch(Exception ex){}
              }    
           }.start();




  }