Android imitation iOS rebound effect ScrollView rebound summary

Android imitation iOS rebound effect ScrollView rebound summary

Should the requirements of the project need to imitate the effect of iOS pull back, I searched the internet a lot of the most of it is to take scrollview change it

I tried some discoveries, and there was a little problem.

The following code is I have made a little change to the release of the people feel not too much trouble

Package Com.example.myscrollview;import Android.content.context;import Android.graphics.rect;import Android.util.attributeset;import Android.view.motionevent;import Android.view.view;import Android.view.animation.translateanimation;import android.widget.scrollview;/** * bolg:http://blog.csdn.net/ aaawqqq?viewmode=contents * * @author Baozi * */public class Myscrollview extends ScrollView {//drag the distance size = 4 means only allow drag Dynamic screen 1/4private static final int size = 4;private View inner;private float y;private rect normal = new Rect (); Public Myscrollview (Context context) {super (context);} Public Myscrollview (context context, AttributeSet Attrs) {Super (context, attrs);} @Overrideprotected void Onfinishinflate () {if (Getchildcount () > 0) {inner = getchildat (0);}} @Overridepublic boolean ontouchevent (motionevent ev) {if (inner = = null) {return super.ontouchevent (EV);} else {Commontou Chevent (EV);} return super.ontouchevent (EV);} public void commontouchevent (motionevent ev) {int action = ev.getaction ();Switch (action) {Case motionevent.action_down:y = ev.gety (); Break;case MotionEvent.ACTION_UP:if (Isneedanimation ()) {/ /LOG.V ("Mlguitar", "'ll up and animation"); animation (); Break;case MotionEvent.ACTION_MOVE:final Float PreY = y;float nowy = ev.gety ();/** * Size=4 represents the distance dragged to the height of the screen */int Delta y = (int) (prey-nowy)/size;//scroll//Scrollby (0, deltay), y = nowy;//will not scroll when scrolling to the top or bottom, then move layout if (Isneedmove ()) {if (norm Al.isempty ()) {//Save normal layout position Normal.set (Inner.getleft (), Inner.gettop (), Inner.getright (), Inner.getbottom ()); return;} int yy = Inner.gettop ()-deltay;//Mobile Layout inner.layout (Inner.getleft (), YY, Inner.getright (), Inner.getbottom ()-DeltaY);} Break;default:break;}} Turn on animation move public void animation () {//Turn on mobile animation translateanimation ta = new translateanimation (0, 0, inner.gettop (), Normal.top ); Ta.setduration (+); inner.startanimation (TA);//set back to normal layout position inner.layout (Normal.left, Normal.top, Normal.right, Normal.bottom); Normal.setempty ();} Whether to turn on animation public boolean isneedanimation () {return!noRmal.isempty ();}  Whether you need to move the layout public boolean isneedmove () {int offset = inner.getmeasuredheight ()-getheight (); int scrolly = getscrolly (); if (scrolly = = 0 | | scrolly = = offset) {return true;} return false;}}　　　　　　　　┏┓┏┓//┏┛┻━━━┛┻┓//┃┃//┃━┃//┃┳┛┗┳┃//┃┃//┃┻┃//┃┃//┗━┓┏━┛//┃┃ God Beast Bless ┃┃ Code No bug! ┃┗━━━┓//┃┣┓//┃┏┛//┗┓┓┏━┳┓┏┛//┃┫┫┃┫┫//┗┻┛┗┻┛

Inside the code, this parameter is used to set the distance to drag.

Size= 4 means that the view will only follow the finger slide 1/4 of the distance

The size=3 represents the distance that follows the finger sliding 1/3

Other empathy

demo:http://download.csdn.net/detail/aaawqqq/7629533

If there's a better effect, please ask me.

I wish you every day to write good code ...