Question

Here is my problem. I have a LinearLayout that has clickable=true for
an onTouch Event so that when the LinearLayout is touched, it slides
up the screen. This works, but afterward when the onTouch Event is
fired from the new location nothing happens.

Steps:

1. I touch the LinearLayout and it moves up like it should.
2. I touch it again and nothing happens
3. I touch the part of the screen where the LinearLayout was originally the LinearLayout will toggle like it should.

It appears as if the view has moved to a new location but in reality it has not.

Below is my xml & code.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/julyContainer"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">


        <RelativeLayout android:id="@+id/rel01"/> 
        <ImageView />
        </RelativeLayout>

        <ImageView             
            android:id="@+id/shadow"
            android:paddingTop="6dip"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/header_barshadow"/>

<ScrollView 
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="@drawable/bg_calendar" 
    android:id="@+id/calScroller">


<RelativeLayout 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">        

        <LinearLayout android:id="@+id/circleLayout"
                android:orientation="horizontal"
                android:clickable="true"
                android:onClick="@string/circleAction"              
                android:paddingTop="10dip"
                android:paddingLeft="10dip"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <Button 
                android:id="@+id/circleCal"
                android:background="@drawable/cal_circle_button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:onClick="@string/circleAction"/>

                <LinearLayout 
                android:id="@+id/circleLayout01"
                android:orientation="vertical"        
            android:paddingLeft="10dip"
            android:paddingRight="3dip"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView/>  
                <TextView/>  
                <TextView/>  

               <LinearLayout android:id="@+id/julylayout2"
                    android:layout_width="match_parent"
                    android:layout_height="0dp"
                    android:orientation="vertical">

              <TextView/>

               </LinearLayout>

            </LinearLayout>
        </LinearLayout>

       <ImageView android:id="@+id/etch1"
                  android:src="@drawable/etch_calendar"
                  android:paddingTop="15dip"
                  android:paddingBottom="15dip"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_below="@id/circleLayout"/>                     

      <LinearLayout android:id="@+id/squareLayout"
                android:clickable="true"
                android:onClick="@string/squareAction"              
                android:orientation="horizontal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:paddingLeft="10dip"
                android:layout_below="@id/etch1">
        <Button 
                android:id="@+id/squareCal"
                android:background="@drawable/cal_square_button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:onClick="@string/squareAction"/>

                <LinearLayout
            android:orientation="vertical"
            android:paddingLeft="10dip"
            android:paddingRight="3dip"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

                <TextView/>  
                <TextView/>  
                <TextView/> 

               <LinearLayout android:id="@+id/layout3"
                    android:layout_width="match_parent"
                    android:layout_height="0dp"
                    android:orientation="vertical">

                    <TextView/>  

               </LinearLayout>
        </LinearLayout>        
    </LinearLayout>        

</RelativeLayout>
</ScrollView>      
</LinearLayout>  

CODE:

private void slideUp(View view) {
    Animation slide = new TranslateAnimation(
            Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
            0.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, -0.25f);
    slide.setDuration(1000);
    slide.setFillAfter(true);
    slide.setFillEnabled(true);

    view.startAnimation(slide);
}

private void slideDown(View view) {
    Animation slide = new TranslateAnimation(
            Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
            0.0f, Animation.RELATIVE_TO_SELF, -0.25f, Animation.RELATIVE_TO_SELF, 0.0f);
    slide.setDuration(1000);
    slide.setFillAfter(true);
    slide.setFillEnabled(true);
    view.startAnimation(slide);
}

NEW CHANGES: output of new positions

07-05 13:20:22.084: I/System.out(15187): onAnimationStart 0 , 120

07-05 13:20:23.053: I/System.out(15187): onAnimationEnd 0 , 120

private void slideUp(final View view) {

        Animation slide = new TranslateAnimation(
                Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
                0.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, -0.75f);
        slide.setDuration(1000);
        slide.setFillAfter(true);
        slide.setFillEnabled(true);
        view.startAnimation(slide);
        slide.setAnimationListener(new AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
                int[] startPosition = new int[2];
                view.getLocationOnScreen(startPosition);
                System.out.println("onAnimationStart " + startPosition[0] + " , " + startPosition[1]);
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                final int left = view.getLeft();
                final int top = view.getTop();
                final int right = view.getRight();
                final int bottom = view.getBottom();

                int offset = (int) 0.75;
                view.layout(left, top + offset * top, right, bottom + offset * bottom);

                int[] endPosition = new int[2];
                view.getLocationOnScreen(endPosition);
                System.out.println("onAnimationEnd " + endPosition[0] + " , " + endPosition[1]);

            }

        });


    }

Answer 1

This is normal behaviour for android animation. It is happening because animation does not really moves the layout so it’s position on the display remains the same. If you want to relocate your layout to the place where your animation ends, you need to call yourLayout.layout() method and pass there 4 parameters, which describe layout’s new position. Keep in mind that layout() gets params relative to it’s parent.

See sample code below

private AnimationListener slideDownAnimationListener = new AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {
        }

        @Override
        public void onAnimationRepeat(Animation animation) {
        }

        @Override
        public void onAnimationEnd(Animation animation) {
            final int left = view.getLeft();
            final int top = view.getTop();
            final int right = view.getRight();
            final int bottom = view.getBottom();
            view.layout(left, top - 0.25 * top, right, bottom - 0.25 * bottom);
        }
};

private Animation slideDownAnimation = new TranslateAnimation(
                                     Animation.RELATIVE_TO_SELF, 0.0f,
                                     Animation.RELATIVE_TO_SELF, 0.0f,
                                     Animation.RELATIVE_TO_SELF, -0.25f,
                                     Animation.RELATIVE_TO_SELF, 0.0f
                                     );

private void slideDown(final View view) {
    slide.setDuration(1000);
    slide.setFillAfter(true);
    slide.setFillEnabled(true);
    slide.setAnimationListener(slideDownAnimationListener);
    view.startAnimation(slideDownAnimation);
}