ImageView의 애니메이션 높이 조정

Question

나중에 데이터베이스에서 수신 할 var가있는 높이로 이미지 뷰에 애니메이션을 적용하려고합니다. 스택 및 다른 사이트를 확인했지만 적절한 대답을 찾지 못했습니다. XML을 사용하여 원하지 않습니다. 여기에 내가 이미 가지고있는 일부 코드 :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context=".MainActivity" > 

    <ImageView 
     android:id="@+id/background" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:src="@drawable/enkelzijdig" /> 

    <ImageView 
     android:id="@+id/bar1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginLeft="75dp" 
     android:layout_marginTop="150dp" 
     android:src="@drawable/animatiebalk" /> 


    </RelativeLayout> 





**than where the magic should happen:** 





    package com.example.grafiek; 



    import android.app.Activity; 
    import android.os.Bundle; 
    import android.view.Window; 
    import android.widget.ImageView; 


    public class MainActivity extends Activity{ 

    ImageView balk1; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     setContentView(R.layout.activity_main); 

     balk1 = (ImageView)findViewById(R.id.balk1); 

    } 


    public void ScaleAnimation (float fromX, float toX, float fromY, float toY){ 

       no clue what to do 


    } 

    } 

Answer 1

이 그렇게하는 애니메이션을 사용 --- 당신이 ANIM 폴더에 다음 slide_up.xml을해야

Animation fadeInFromTopAnimation = AnimationUtils 
          .loadAnimation(ActivityName.this, R.anim.slide_up); 
        fadeInFromTopAnimation 
          .setAnimationListener(new AnimationListener() { 
           public void onAnimationStart(Animation anim) { 

           } 

           public void onAnimationEnd(Animation anim) { 
            imageView.setVisibility(View.GONE); 
           } 

           public void onAnimationRepeat(Animation anim) { 
           } 
          }); 


        imageView.startAnimation(fadeInFromTopAnimation); 

은 ---

<?xml version="1.0" encoding="utf-8"?> 
<set 
xmlns:android   = "http://schemas.android.com/apk/res/android" 
android:interpolator = "@android:anim/linear_interpolator"> 

<alpha 
    android:fromAlpha  = "1" 
    android:toAlpha   = "0" 
    android:duration  = "100"> 
</alpha> 

<scale 
    android:fromXScale  = "1" 
    android:fromYScale  = "1" 
    android:toXScale  = "1" 
    android:toYScale  = "0" 
    android:pivotX   = "50%" 
    android:pivotY   = "0%" 
    android:duration  = "100"> 
</scale> 
</set>