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androidandroid-animationtranslate-animation

Delays within the Animation (TranslateAnimation)


Is there a way to have the Animation pause for a half a second?

I am trying to make an infinite animation using the TranslateAnimation API. So, I use the RepeatCount as Infinite. I also noticed that there's a setStartOffset(...) method that covers the case when I'd like to have a delay in starting the animation. However, I can't find a way to have a delay before each 'restart'. Since animation is gonna happen infinite amount of times, every time the animation restarts I need to put a delay in.

Any ideas?

Thanks!!


Solution

  • Here is an example:

    First the layout (main.xml) with an image we would like to animate:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
    
        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher" />
    
    </LinearLayout>
    

    Next one is the animation. Placed in res/anim and is called anim_img.xml. The file contains the translation animation with android:startOffset="500" (in millisec). This will set the offset, which is used every time animation starts:

    <?xml version="1.0" encoding="utf-8"?>
    <set>
    
        <translate
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:duration="1000"
            android:fromXDelta="0%"
            android:fromYDelta="0%"
            android:toXDelta="0%"
            android:toYDelta="100%"
            android:zAdjustment="top" 
            android:repeatCount="infinite"
            android:startOffset="500"/>
    
    </set>
    

    And last but not least - the activity. Which starts the animation:

    public class StackOverflowActivity extends Activity {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
    
            ImageView iv_icon = (ImageView) findViewById(R.id.imageView1);
    
            Animation a = AnimationUtils.loadAnimation(this, R.anim.anim_img);
            a.setFillAfter(true);
            a.reset();
    
            iv_icon.startAnimation(a);
        }
    }