How to use

performClick

method

in

android.widget.RadioButton

@Test
public void canBeClickedToToggleCheckedState() throws Exception {
 assertFalse(radioButton.isChecked());
 radioButton.performClick();
 assertTrue(radioButton.isChecked());
 radioButton.performClick();
 assertTrue(radioButton.isChecked()); // radio buttons can't be turned off again with a click
}

 RadioButton simple;
simple= (RadioButton) findViewById(R.id.radioButtonFenetresSimple);
simple.setChecked(true);
simple.performClick();

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_transition);
  ButterKnife.bind(this);
  btFade.performClick();
  scenesMethod();
  nowTransition.addListener(this);
}

  @TargetApi(Build.VERSION_CODES.LOLLIPOP)
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
//        getWindow().setExitTransition(new Slide(Gravity.TOP));
//        getWindow().setReenterTransition(new Slide(Gravity.BOTTOM));

    FrameLayout content = (FrameLayout) findViewById(android.R.id.content);
    System.out.println("before Child count:" + content.getChildCount());
    setContentView(R.layout.activity_main);
    System.out.println("after Child count:" + content.getChildCount());

    ButterKnife.bind(this);
    btFade.performClick();

  }