Question

My app has a small web view that I want to animate into place once the page has finished loading. My code looks like this:

view.setVisibility(View.VISIBLE);
TranslateAnimation anim=new TranslateAnimation(0.0f, 0.0f,
                                  view.getLayoutParams().height, 0.0f);
anim.setDuration(5);
anim.setInterpolator(new LinearInterpolator());
view.startAnimation(anim);

It animates all right, but I can’t seem to control the speed. I’ve set the value for setDuration() to 5, 500, 5000, 5000000 – all to no discernible effect.

Is there something else I need to do to control animation duration?

BTW my base SDK is 1.6.

Answer 1

I use XML approach for setting animation for a layout.

translate.xml

<?xml version="1.0" encoding="utf-8"?>
<set
     xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator" >  
      <translate 
        android:fromYDelta="-100%" 
        android:toYDelta="0"
        android:duration="500" />"
       />
</set>

To control the animation duration, you could try changing android:duration ="500" to values you require.

layout_anim_controller.xml

<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
        android:animationOrder="reverse"
        android:animation="@anim/translate" />

Setting the Animation for the layout

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

    <WebView 
        android:id="@+id/webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layoutAnimation="@anim/layout_anim_controller"
    />

</LinearLayout>

Maybe this helps a little bit in the right direction.