java如何沿Y轴移动gif

Question

我想知道如何沿着Y轴移动gif。我认为这类似于移动一个ImageView，但是，这不起作用。我只是在尝试将gif沿Y轴从页面顶部移动到页面底部。gif将在沿Y轴移动时播放。动画只需获取gif的alpha，并将其从0.0打开到1.0。并沿Y轴变换gif的位置。我不知道如何用ImageView管理它。我已经包括了页面的XML文件、动画的XML文件和页面翻译的Java文件

我的XML文件是：

<?xml version="1.0" encoding="utf-8"?>
<安卓x.constraintlayout.widget.ConstraintLayout 
xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
xmlns:app="http://schemas.安卓.com/apk/res-auto"
xmlns:tools="http://schemas.安卓.com/tools"
安卓:orientation="vertical"
安卓:layout_width="match_parent"
安卓:layout_height="match_parent"
安卓:background="@drawable/splash_screen_bg"
tools:context=".MainActivity">

<pl.droidsonroids.gif.GifImageView
    安卓:id="@+id/gifAudio"
    安卓:layout_width="250dp"
    安卓:layout_height="250dp"
    安卓:src="@drawable/bass_speaker"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.496"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.095" />

<ImageView
    安卓:id="@+id/applogo"
    安卓:layout_width="0dp"
    安卓:layout_height="wrap_content"
    安卓:layout_marginStart="10dp"
    安卓:layout_marginTop="160dp"
    安卓:layout_marginEnd="10dp"
    安卓:src="@drawable/logo"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<TextView
    安卓:id="@+id/presstitle"
    安卓:layout_width="0dp"
    安卓:layout_height="wrap_content"
    安卓:layout_marginTop="74dp"
    安卓:text="PRESS 1"
    安卓:textAlignment="center"
    安卓:textColor="#044070"
    安卓:textSize="70sp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/applogo" />

<TextView
    安卓:id="@+id/pressactive"
    安卓:layout_width="0dp"
    安卓:layout_height="wrap_content"
    安卓:shadowColor="@color/black"
    安卓:shadowDx="5"
    安卓:shadowDy="5"
    安卓:shadowRadius="1"
    安卓:text="Now Active"
    安卓:textAlignment="center"
    安卓:textColor="#6C6C6C"
    安卓:textSize="40sp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/presstitle" />


  </安卓x.constraintlayout.widget.ConstraintLayout>

---

我的Java文件是：

package com.quadsoftentertainment.press1;

import 安卓x.appcompat.app.AppCompatActivity;
import 安卓.content.Intent;
import 安卓.os.Bundle;
import 安卓.os.Handler;
import 安卓.view.WindowManager;
import 安卓.view.animation.Animation;
import 安卓.view.animation.AnimationUtils;
import 安卓.widget.ImageView;
import 安卓.widget.TextView;

import pl.droidsonroids.gif.GifImageView;

// ****** Main Activity is the SPLASH SCREEN for the Press 1 application ******

public class MainActivity extends AppCompatActivity {

//Delay time
private static int SPLASH_SCREEN = 5000;

//var
Animation topAnim, bottomAnim, bottomPulseAnim, backAnim;
ImageView logoImg;
TextView logoTxt, sloganTxt;
GifImageView backVid;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_main);

    //Animations
    topAnim = AnimationUtils.loadAnimation(this,R.anim.top_animation);
    bottomAnim = AnimationUtils.loadAnimation(this,R.anim.bottom_animation);
    bottomPulseAnim = AnimationUtils.loadAnimation(this, R.anim.bottom_pulse);
    backAnim = AnimationUtils.loadAnimation(this, R.anim.back_animation);

    //Hooks
    backVid = findViewById(R.id.bass_speaker);  // error on this line, cannot find id of gif
    logoImg = findViewById(R.id.applogo);
    logoTxt = findViewById(R.id.presstitle);
    sloganTxt = findViewById(R.id.pressactive);

    backVid.setAnimation(backAnim);
    logoImg.setAnimation(topAnim);
    logoTxt.setAnimation((bottomPulseAnim));
    sloganTxt.setAnimation(bottomAnim);

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            Intent move = new Intent(MainActivity.this, MainProgram.class);
            startActivity(move);
            finish();
        }
    }, SPLASH_SCREEN);
}

}

---

我的动画XML文件是：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:安卓="http://schemas.安卓.com/apk/res/安卓">

<translate
    安卓:fromXDelta="0%"
    安卓:fromYDelta="-50%"
    安卓:duration="2000"/>

<alpha
    安卓:fromAlpha="0.1"
    安卓:toAlpha="1.0"
    安卓:duration="2000"/>

</set>

---

任何帮助都会很好。谢谢