android set text size in code

text size

public class TestActivity extends Activity {

	@Override
    protected void onCreate(Bundle savedInstanceState) {
		Log.i("TestActivity", "onCreate");
        super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_test);
		
		TextView view = (TextView) findViewById(R.id.test_size);
		int size = getResources().getDimensionPixelSize(R.dimen.test_text_size);
		size = px2sp(getApplicationContext(), size);
		view.setTextSize(size);
	}
	
	public static int px2sp(Context context, float pxValue) {  
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;  
        return (int) (pxValue / fontScale + 0.5f);  
    } 
}