因為專案有需要，在退出登入的時候做一個抖動的對話方塊，來提醒使用者。下面啥也不說了，上程式碼：

有需要popwindow的一些屬性：

private void showPopup(View view) {

//載入佈局

View contentViewt = LayoutInflater.from(SettingActivity.this).inflate(
        R.layout.exit_popwindow, null);
final PopupWindow popWindow = new 
 
PopupWindow(contentViewt,
        ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT,
        true);

// popWindow.setBackgroundDrawable(new BitmapDrawable());為啥這裡要註釋呢，因為如果設定了這個屬性，當你點選popwindow外部的時候就不會觸發dimiss（）

popWindow.setWidth(ScreenUtil.getScreenWidth(this) * 4 / 5);//這邊是獲取到螢幕的寬度*5
popWindow.setFocusable(true
 
);

//設定SelectPicPopupWindow彈出窗體的背景
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.alpha = 0.7f;
getWindow().setAttributes(lp);
//設定選單顯示的位置
popWindow.showAtLocation(view, Gravity.CENTER_VERTICAL, 0, 0);

//重點的動畫來了

   ObjectAnimator animator = tada(contentViewt);
//      animator.setRepeatCount(ValueAnimator.INFINITE); //無限迴圈
 
animator.start();

//設定點選事件：
contentViewt.findViewById(R.id.cancle_tv).setOnClickListener(new View.OnClickListener() {
    @Override
public void onClick(View v) {
        popWindow.dismiss();
    }
});

//監聽選單的關閉事件
popWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
    @Override
public void onDismiss() {
        WindowManager.LayoutParams lp = getWindow().getAttributes();
        lp.alpha = 1f;
        getWindow().setAttributes(lp);
    }
});

}

public static ObjectAnimator tada(View view) {
    return tada(view, 1f);
}

//新增退出效果動畫
public static ObjectAnimator tada(View view, float shakeFactor) {

    PropertyValuesHolder pvhScaleX = PropertyValuesHolder.ofKeyframe(View.SCALE_X,
            Keyframe.ofFloat(0f, 1f),
            Keyframe.ofFloat(.1f, .9f),
            Keyframe.ofFloat(.2f, .9f),
            Keyframe.ofFloat(.3f, 1.1f),
            Keyframe.ofFloat(.4f, 1.1f),
            Keyframe.ofFloat(.5f, 1.1f),
            Keyframe.ofFloat(.6f, 1.1f),
            Keyframe.ofFloat(.7f, 1.1f),
            Keyframe.ofFloat(.8f, 1.1f),
            Keyframe.ofFloat(.9f, 1.1f),
            Keyframe.ofFloat(1f, 1f)
    );

    PropertyValuesHolder pvhScaleY = PropertyValuesHolder.ofKeyframe(View.SCALE_Y,
            Keyframe.ofFloat(0f, 1f),
            Keyframe.ofFloat(.1f, .9f),
            Keyframe.ofFloat(.2f, .9f),
            Keyframe.ofFloat(.3f, 1.1f),
            Keyframe.ofFloat(.4f, 1.1f),
            Keyframe.ofFloat(.5f, 1.1f),
            Keyframe.ofFloat(.6f, 1.1f),
            Keyframe.ofFloat(.7f, 1.1f),
            Keyframe.ofFloat(.8f, 1.1f),
            Keyframe.ofFloat(.9f, 1.1f),
            Keyframe.ofFloat(1f, 1f)
    );

    PropertyValuesHolder pvhRotate = PropertyValuesHolder.ofKeyframe(View.ROTATION,
            Keyframe.ofFloat(0f, 0f),
            Keyframe.ofFloat(.1f, -3f * shakeFactor),
            Keyframe.ofFloat(.2f, -3f * shakeFactor),
            Keyframe.ofFloat(.3f, 3f * shakeFactor),
            Keyframe.ofFloat(.4f, -3f * shakeFactor),
            Keyframe.ofFloat(.5f, 3f * shakeFactor),
            Keyframe.ofFloat(.6f, -3f * shakeFactor),
            Keyframe.ofFloat(.7f, 3f * shakeFactor),
            Keyframe.ofFloat(.8f, -3f * shakeFactor),
            Keyframe.ofFloat(.9f, 3f * shakeFactor),
            Keyframe.ofFloat(1f, 0)
    );

    return ObjectAnimator.ofPropertyValuesHolder(view, pvhScaleX, pvhScaleY, pvhRotate).
            setDuration(1000);

    效果圖如下：

圖一是成果圖，圖二是抖動時候，沒有gif圖。。。大家可以自己去試試！

為了方便大家，順便佈局一起丟了吧：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/shape_wuliu"
android:orientation="vertical">


    <TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:gravity="center"
android:text="退出登入"
android:textColor="@color/fontColor2"
android:textSize="@dimen/font_size_16sp" />

    <TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="30px"
android:layout_marginTop="30px"
android:gravity="center"
android:text="你確定退出登入嗎？"
android:textColor="@color/fontColor2"
android:textSize="15sp" />

    <TextView
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginLeft="@dimen/margin_size_1dp"
android:layout_marginRight="@dimen/margin_size_1dp"
android:background="@color/viewColor" />

    <LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center_vertical"
android:orientation="horizontal">

        <TextView
android:id="@+id/cancle_tv"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="取消"
android:textColor="@color/background_tab_pressed"
android:textSize="15sp" />

        <TextView
android:layout_width="1dp"
android:layout_height="match_parent"
android:layout_marginBottom="2px"
android:layout_marginTop="1px"
android:background="@color/viewColor" />

        <TextView
android:id="@+id/config_tv"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="確定"
android:textColor="@color/background_tab_pressed"
android:textSize="15sp" />

    </LinearLayout>

</LinearLayout>

}