Android 翻译动画 - 使用 AnimationListener 将 View 永久移动到新位置 [英] Android translate animation - permanently move View to new position using AnimationListener

问题描述

我有安卓翻译动画.我有一个随机生成位置(next1，next2)的ImageView.我每 3 秒调用一次 void.它生成 View 的新位置，然后制作动画并将 View 移动到目标位置.翻译动画实现了 AnimationListener .动画完成后，我将 View 永久移动到新位置(在 OnAnimationEnd 中).我的问题是动画位置与设置 layoutParams 位置不对应.当动画结束时，它会跳转到一个新的位置，大约 50-100 像素远.我认为位置应该相同，因为我在两种情况下都使用相同的值 (next1, next2).请你能告诉我找到解决方案的方法吗?

I have android translate Animation. I have an ImageView with random generated position (next1, next2). I am calling void every 3 seconds. It generates new position of the View and then make animation and move View to destination position. Translate animation has AnimationListener implemented. When the animation finish, I move View permanently to the new position (in OnAnimationEnd). My problem is that animation position does not correspond with setting layoutParams positions. When animation end, it makes jump to a new position, which is about 50-100 pixels far. I think the positions should be the same because I use same values (next1, next2) in both situations. Please can you show me the way to find sollution ?

 FrameLayout.LayoutParams pozice_motyl = (FrameLayout.LayoutParams)  pozadi_motyl.getLayoutParams();    
            TranslateAnimation anim = new TranslateAnimation(Animation.ABSOLUTE,pozice_motyl.leftMargin, Animation.ABSOLUTE, next1, Animation.ABSOLUTE, pozice_motyl.topMargin, Animation.ABSOLUTE, next2);
            anim.setDuration(1000);
            anim.setFillAfter(true);
            anim.setFillEnabled(true);

            anim.setAnimationListener(new Animation.AnimationListener() {
                @Override
                public void onAnimationStart(Animation animation) {
                }

                @Override
                public void onAnimationEnd(Animation animation) {




                    FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(100, 100);

                    layoutParams.leftMargin = (int)(next1);
                    layoutParams.topMargin = (int)(next2);
                    pozadi_motyl.setLayoutParams(layoutParams);

                }

                @Override
                public void onAnimationRepeat(Animation animation) {

                }
            });

            pozadi_motyl.startAnimation(anim);

这是 XML 布局:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:id="@+id/pozadi0"
    android:gravity="center_vertical"
    android:layout_gravity="center_vertical"          
    android:background="@drawable/pozadi2"
    >



<LinearLayout
android:id="@+id/pozadi_motyl"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        >

  <ImageView android:id="@+id/obrazek_motyl"
             android:src="@drawable/motyl"
             android:layout_width="100dip"
             android:layout_height="100dip"
                         />

   </LinearLayout>


<LinearLayout 
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>

<RelativeLayout
android:id="@+id/obrazek_pozadi0"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>



 <ImageView android:id="@+id/zaba_obrazek0"
android:src="@drawable/zaba_obrazek"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerInParent="true"
/>

</RelativeLayout>   
</LinearLayout> 

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent" 
>

<cz.zaba.Spojnice  
android:layout_width="fill_parent"          
android:layout_height="fill_parent" 
/>

</LinearLayout>
</FrameLayout>

推荐答案

我通常更喜欢在翻译动画中使用 deltas，因为它避免了很多混乱.

I usually prefer to work with deltas in translate animation, since it avoids a lot of confusion.

试试这个，看看它是否适合你:

Try this out, see if it works for you:

TranslateAnimation anim = new TranslateAnimation(0, amountToMoveRight, 0, amountToMoveDown);
anim.setDuration(1000);

anim.setAnimationListener(new TranslateAnimation.AnimationListener() {

    @Override
    public void onAnimationStart(Animation animation) { }

    @Override
    public void onAnimationRepeat(Animation animation) { }

    @Override
    public void onAnimationEnd(Animation animation) 
    {
        FrameLayout.LayoutParams params = (FrameLayout.LayoutParams)view.getLayoutParams();
        params.topMargin += amountToMoveDown;
        params.leftMargin += amountToMoveRight;
        view.setLayoutParams(params);
    }
});

view.startAnimation(anim);

确保amountToMoveRight/amountToMoveDown final

希望这有帮助:)

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