how to make android menu , and how to open new screen when choose an item in this menu
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle item selection
    switch (item.getItemId()) {
    case R.id.main:
        setContentView(R.layout.test2);
        return true;
    case R.id.news:
        setContentView(R.layout.test2);
        return true;
    case R.id.feature:
        setContentView(R.layout.test1);
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }

<activity android:name="your.pacakge.MyTaskActivity" />

startActivity(new Intent(this, MyTaskActivity.class));