Error on Android Handler update interface

Question

Handler handler = new Handler() {
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        ReturnShow.setText(sMsg);//ReturnShow EditText
        ReturnShow.setSelection(ReturnShow.length());
    }
};

class ReadThread extends Thread {
    public void run() {
        sMsg = "...";
        handler.sendMessage(handler.obtainMessage());
    }
}

Everytime I run, the setText line will have error, I can't figure out why?

Thanks for your help.

enter image description here

score 1 · Accepted Answer · answered May 14 '13 at 07:24

1

Make sure that ReturnShow is initialized before setting it..

Something like..

ReturnShow = (EditText)findViewById(R.id.edittext);

answered May 14 '13 at 07:24

Nermeen

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thanks for your answer，but I have Assign this value in OnCreate,the error is still on – Miss.seven May 14 '13 at 09:10
the error is in ReturnShow.setText(sMsg) or ReturnShow.setSelection(ReturnShow.length())? – Nermeen May 14 '13 at 09:13
oh.i'm stupid ,i found the error,`ReturnShow = (EditText) findViewById(R.id.ResultShow);` I use a incorrect ID here.thanks for your answer. – Miss.seven May 14 '13 at 09:38

Error on Android Handler update interface

1 Answers1