Android Thread modify EditText

Question

I am having a problem with modifying EditText in another function started by the thread:

Thread thRead = new Thread( new Runnable(){
    public void run(){
          


        

Answer 1

First of all take a look at your log, it usually contains a stack trace when an app shuts down.

You shouldn't run the thread like you normally do, instead use runOnUiThread:

Runnable thRead = new Runnable(){
   public void run() {
      EditText _txtArea = (EditText) findViewById(R.id.txtArea);
      startReading(_txtArea);
   }
};
runOnUiThread(thRead);

The explaination: Only the UI thread is allowed to change the state of UI components.