NoClassDefFoundError android

Question

我不会像在tutorial

中那样添加材料动画

我创建主要活动

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    setupWindowAnimations();
    FloatingActionButton floatingActionButton = (FloatingActionButton)
            findViewById(R.id.floating_action_button);
    floatingActionButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this, SearchActivity.class);
            startActivity(intent);
        }
    });

}
private void setupWindowAnimations() {
    Slide slide = new Slide();
    slide.setDuration(1000);
    getWindow().setExitTransition(slide);
}

并创建第二个活动  protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_search); setupWindowAnimations(); } private void setupWindowAnimations() { Fade fade = new Fade(); fade.setDuration(1000); getWindow().setEnterTransition(fade); }

但是当我启动我的应用时，我得到NoClassDefFoundError

java.lang.NoClassDefFoundError: android.transition.Slide ua.com.alc.alcotaste E/AndroidRuntime:at ua.com.alc.alcotaste.MainActivity.setupWindowAnimations(MainActivity.java:54) ua.com.alc.alcotaste E/AndroidRuntime:at ua.com.alc.alcotaste.MainActivity.onCreate(MainActivity.java:28)