Question

i have to show some operations in Android,,,

but Im having some noob problem,

public void calculateButtonPressed() {
        // TODO Auto-generated method stub
        Button button = (Button) findViewById(R.id.result);

        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Log.d("myTag",  "result biatch");

                String text=et.getText().toString();

                //toast msg
                //Toast msg = Toast.makeText(getBaseContext(),text, Toast.LENGTH_LONG);
                // msg.show();

                //set Text
                tv.setText(text);

                //result_tv.setText("copao");

                int total = 1+2+3;

                result_tv.setText(total);

            }

        });

    }

so the app crashes , as im not using the variable correctly??

If I print the result_tv.setText("copao"); it works fine

but on my basic operation the app crashes,

int total = 1+2+3;

result_tv.setText(total);

so what Im I missing?

thanks!

Answer 1

It is assuming your total value as a string resource Id which might not be available in the R class as a valid resource Id, causing the app to crash.

Change:

result_tv.setText(total);

To:

result_tv.setText(String.valueOf(total));
//OR
result_tv.setText(total + ""); //to parse it as string