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copied!<p>Ok, I solved it. </p> <p>There are few issuses you should know about animation:</p> <ol> <li><p>The animation paremeters are not simple "From (fixed position)" --> "To (fix position)" as you should think. There are more like "From (current position/0)" --> "How much steps to do and on which direction (pluse for positive/ minus for negative)"</p></li> <li><p>The Animation doesn't change the real position of the view on the screen, Therefore if you want to stop the animation at the end position, you should use: </p> <pre><code>animation.setFillAfter(true); </code></pre></li> <li><p>If you do want to change the REAL position of the view you should update the view parameters on "onAnimationEnd" (like below code), or calculate position and set Y/X position manually (again on "onAnimationEnd"), like:</p> <pre><code>animatedView.setY(stopPosition); </code></pre></li> </ol> <p>The Code:</p> <pre><code> public class AnimationActivity extends Activity { private boolean isUp; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ((Button) findViewById(R.id.button1)) .setOnClickListener(new OnClickListener() { public void onClick(final View v) { final float direction = (isUp) ? -1 : 1; final float yDelta = getScreenHeight() - (2 * v.getHeight()); final int layoutTopOrBottomRule = (isUp) ? RelativeLayout.ALIGN_PARENT_TOP : RelativeLayout.ALIGN_PARENT_BOTTOM; final Animation animation = new TranslateAnimation(0,0,0, yDelta * direction); animation.setDuration(500); animation.setAnimationListener(new AnimationListener() { public void onAnimationStart(Animation animation) { } public void onAnimationRepeat(Animation animation) { } public void onAnimationEnd(Animation animation) { // fix flicking // Source : http://stackoverflow.com/questions/9387711/android-animation-flicker TranslateAnimation anim = new TranslateAnimation(0.0f, 0.0f, 0.0f, 0.0f); anim.setDuration(1); v.startAnimation(anim); //set new params LayoutParams params = new LayoutParams(v.getLayoutParams()); params.addRule(RelativeLayout.CENTER_HORIZONTAL); params.addRule(layoutTopOrBottomRule); v.setLayoutParams(params); } }); v.startAnimation(animation); //reverse direction isUp = !isUp; } }); } private float getScreenHeight() { DisplayMetrics displaymetrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(displaymetrics); return (float) displaymetrics.heightPixels; } </code></pre> <p>}</p>

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