change bytes[] to string

Question

I have a problem in this code The tv.setText(str); is working and the text for tv change to "LED1", but in if(str=="LED1") it's not working! What is the problem?

Handler = new Handler()
{
    @Override
    public void handleMessage(Message msg)
    { 
        byte [] data= (byte[]) msg.obj;
        try {
            tv.setText("");
            String str = new String(data, "UTF-8");
            tv.setText(str);
            if(str=="LED1")
            {
                tv.setBackgroundColor(getResources().getColor(R.color.red));
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
};

score 1 · Answer 1 · edited May 23 '17 at 12:07

1

You need to use equals instead of == for a String.

Which mean if(str.equals("LED1")) instead of if(str=="LED1")

See How do I compare strings in Java?

edited May 23 '17 at 12:07

Community

1
1

answered Dec 24 '15 at 08:50

Tarik

4,961
3
36
67

score 1 · Answer 2 · answered Dec 24 '15 at 08:53

1

The issue occurs because you are using == operators to compare to strings. You need to use equals to match the string. As we require to compare the values.

change the below line

if(str=="LED1")

to

if("LED1".equals(str))

answered Dec 24 '15 at 08:53

Vivek Singh

2,047
11
24

change bytes[] to string

2 Answers2