Android Java使图像向下移动

Question

How can i make a image just scroll down a straight line by it self?

Like

The Image starts up here and then it will just smoothly scroll down till it hits the bottom and stop

Please look at this: http://tinypic.com/r/1z17iv9/7

Answer 1

i think you should take a look about TranslateAnimation on the doc , refer this ,

And this is some examples of it : Tutorials

Answer 2

You should save this TopDownAnim.xml in the anim folder inside resources.

<translate android:interpolator="@android:anim/accelerate_interpolator" 
    android:fromXDelta="0" android:toXDelta="0" android:zAdjustment="top" 
    android:fromYDelta="0%" android:toYDelta="100%" android:duration="1000"/>

And in the code you can use something like

TranslateAnimation tdAnim = AnimationUtils.loadAnimation(this, 
        R.anim.TopDownAnim);

view.startAnimation(tdAnim);

Answer 3

Your question is a bit vague, but I think what you're looking for is a ScrollView. Try referring to this documentation . What you want to do is to put the ImageView inside this ScrollView.

EDIT Ah, I see. I apologize for misunderstanding what you were asking about. Perhaps you should consider animating the ImageView with some basic view animations. Try looking at this question .

Answer 4

These tasks are there in game development where the objects are moved around the screen. You can take a look at this and see how objects are moved on the screen. On the same lines you can solve your problem.