/** * 仿易信動畫彈出框 */public class MainActivity extends ActionBarActivity {  //用于標記頁面頂端位置  private View topView;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    topView = findViewById(R.id.main_top);  }  private PopupWindow popupWindow;  private int line1DeltaY, line2DeltaY;  //仿易信更多彈出框  private void showPopup() {    if (popupWindow == null) {      View contentView = LayoutInflater.from(this).inflate(R.layout.yixin_pop_layout, null);      //點擊空白區域關閉      View blankView = contentView.findViewById(R.id.yixin_more_blank);      View blankView2 = contentView.findViewById(R.id.yixin_more_blank2);      initItems(contentView);      //測量高度      int line2Height = ViewUtils.getViewMeasuredHeight(itemViews[0]);      line1DeltaY = -getActionBarHeight() - 40;      line2DeltaY = line1DeltaY - line2Height;      blankView.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {          dismissPopup();        }      });      blankView2.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {          dismissPopup();        }      });      popupWindow = new PopupWindow(contentView, ScreenUtils.getScreenW(this), ScreenUtils.getScreenH(this));      //隨便設置一個drawable作為背景      popupWindow.setBackgroundDrawable(new ColorDrawable());    }    if (!popupWindow.isShowing()) {      popupWindow.showAsDropDown(topView, 0, 0);      for (int i = 0; i < itemViews.length; i++) {        if (i < 3) {          //第一行          itemViews[i].startAnimation(AnimationHelper.createPopupAnimIn(this, line1DeltaY));        } else {          //第二行          itemViews[i].startAnimation(AnimationHelper.createPopupAnimIn(this, line2DeltaY));        }      }      popupWindow.getContentView().startAnimation(AnimationHelper.createPopupBgFadeInAnim());    }  }  private void dismissPopup() {    if (popupWindow == null || !popupWindow.isShowing()) {      return;    }    ViewGroup contentView = (ViewGroup) popupWindow.getContentView();    contentView.startAnimation(AnimationHelper.createPopupBgFadeOutAnim(AnimationHelper.TIME_OUT));    for (int i = 0; i < itemViews.length; i++) {      if (i < 3) {        //第一行        itemViews[i].startAnimation(AnimationHelper.createPopupAnimOut(this, line1DeltaY));      } else {        //第二行        itemViews[i].startAnimation(AnimationHelper.createPopupAnimOut(this, line2DeltaY));      }    }    //動畫結束時隱藏popupWindow    contentView.postDelayed(new Runnable() {      @Override      public void run() {        popupWindow.dismiss();      }    }, AnimationHelper.TIME_OUT + 10);  }  private View[] itemViews;  //初始化popupWindow上的按鈕  private void initItems(View parent) {    int[] viewIds = new int[]{R.id.yixin_more_item1, R.id.yixin_more_item2, R.id.yixin_more_item3,        R.id.yixin_more_item4, R.id.yixin_more_item5, R.id.yixin_more_item6};    itemViews = new View[viewIds.length];    int itemWidth = ScreenUtils.getScreenW(this) / 3;    OnClickImpl l = new OnClickImpl();    for (int i = 0; i < viewIds.length; i++) {      int id = viewIds[i];      itemViews[i] = parent.findViewById(id);      GridLayout.LayoutParams p = (GridLayout.LayoutParams) itemViews[i].getLayoutParams();      p.width = itemWidth;      itemViews[i].setLayoutParams(p);      itemViews[i].setOnClickListener(l);    }  }  private class OnClickImpl implements View.OnClickListener {    @Override    public void onClick(View v) {      final int viewId = v.getId();      //背景動畫      popupWindow.getContentView().startAnimation(AnimationHelper.createPopupBgFadeOutAnim(AnimationHelper.TIME_OUT_CLICK));      //動畫結束時隱藏popupWindow      v.postDelayed(new Runnable() {        @Override        public void run() {          popupWindow.dismiss();          //動畫結束時響應點擊事件          handleEvent(viewId);        }      }, AnimationHelper.TIME_OUT_CLICK + 10);      //按鈕動畫      for (View item : itemViews) {        if (item.getId() == v.getId()) {          //點擊的按鈕，放大          item.startAnimation(AnimationHelper.createPopupItemBiggerAnim(MainActivity.this));        } else {          //其它按鈕，縮小          item.startAnimation(AnimationHelper.createPopupItemSmallerAnim(MainActivity.this));        }      }    }  }  //popupWindow上按鈕的點擊事件  private void handleEvent(int viewId) {    Toast.makeText(this, "點擊了按鈕：" + viewId, Toast.LENGTH_SHORT).show();  }  private int getActionBarHeight() {    return getSupportActionBar().getHeight();  }  @Override  public boolean onCreateOptionsMenu(Menu menu) {    getMenuInflater().inflate(R.menu.menu_main, menu);    return true;  }  @Override  public boolean onOptionsItemSelected(MenuItem item) {    int id = item.getItemId();    if (id == R.id.action_more) {      if (popupWindow == null || !popupWindow.isShowing()) {        showPopup();      } else {        dismissPopup();      }      return true;    }    return super.onOptionsItemSelected(item);  }  //點擊返回鍵時，如果popupWindow是顯示狀態，則關閉它  @Override  public void onBackPressed() {    if (popupWindow != null && popupWindow.isShowing()) {      dismissPopup();      return;    }    super.onBackPressed();  }}

/** * AnimationHelper */public class AnimationHelper {  /**   * 進入動畫的時間   */  public static final int TIME_IN = 300;  /**   * 進入動畫之后的反彈動畫時間   */  public static final int TIME_IN_BACK = 100;  /**   * 退出動畫的時間   */  public static final int TIME_OUT = 300;  /**   * 點擊PopupWindow上菜單后退出動畫的時間   */  public static final int TIME_OUT_CLICK = 500;  /**   * PopupWindow上菜單進入動畫   */  public static Animation createPopupAnimIn(Context context, int fromYDelta) {    AnimationSet animationSet = new AnimationSet(context, null);//    animationSet.setInterpolator(new BounceInterpolator()); //結束時彈跳    animationSet.setFillAfter(true);    //移動    TranslateAnimation translateAnim = new TranslateAnimation(0, 0, fromYDelta, 20);    translateAnim.setDuration(TIME_IN);    animationSet.addAnimation(translateAnim);    //回彈效果    TranslateAnimation translateAnim2 = new TranslateAnimation(0, 0, 0, -20);    translateAnim2.setStartOffset(TIME_IN);    translateAnim2.setDuration(TIME_IN_BACK);    animationSet.addAnimation(translateAnim2);    return animationSet;  }  /**   * PopupWindow上菜單離開動畫   */  public static Animation createPopupAnimOut(Context context, int toYDelta) {    AnimationSet animationSet = new AnimationSet(context, null);    animationSet.setFillAfter(true);    TranslateAnimation translateAnim = new TranslateAnimation(0, 0, 0, toYDelta);    translateAnim.setDuration(TIME_OUT);    animationSet.addAnimation(translateAnim);    return animationSet;  }  /**   * PopupWindow背景進入動畫（透明度漸變）   */  public static Animation createPopupBgFadeInAnim() {    AlphaAnimation anim = new AlphaAnimation(0, 1.0f);    anim.setDuration(TIME_IN);    anim.setFillAfter(true);    return anim;  }  /**   * PopupWindow背景離開動畫（透明度漸變）   */  public static Animation createPopupBgFadeOutAnim(int duration) {    AlphaAnimation anim = new AlphaAnimation(1.0f, 0);    anim.setDuration(duration);    anim.setFillAfter(true);    return anim;  }  /**   * PopupWindow按鈕點擊動畫   */  public static Animation createPopupItemBiggerAnim(Context context) {    AnimationSet animationSet = new AnimationSet(context, null);    animationSet.setFillAfter(true);    //放大(設置縮放的中心點為自己的中心)    ScaleAnimation scaleAnim = new ScaleAnimation(1.0f, 2.0f, 1.0f, 2.0f,        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);    scaleAnim.setDuration(TIME_OUT_CLICK);    animationSet.addAnimation(scaleAnim);    //漸變    AlphaAnimation alphaAnim = new AlphaAnimation(1.0f, 0);    alphaAnim.setInterpolator(new AccelerateInterpolator());    alphaAnim.setDuration(TIME_OUT_CLICK);    animationSet.addAnimation(alphaAnim);    return animationSet;  }  /**   * PopupWindow按鈕點擊時其它按鈕的動畫   */  public static Animation createPopupItemSmallerAnim(Context context) {    //放大(設置縮放的中心點為自己的中心)    ScaleAnimation scaleAnim = new ScaleAnimation(1.0f, 0, 1.0f, 0,        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);    scaleAnim.setDuration(TIME_OUT_CLICK);    scaleAnim.setFillAfter(true);    return scaleAnim;  }}