android 弹性效果
重写自己的view，覆盖父类的overScrollBy方法。
代码：
import android.content.Context;import android.util.AttributeSet;import android.util.DisplayMetrics;import android.widget.ScrollView;/** * ClassName:MtScrollView * Function: TODO ADD FUNCTION . * * VERSION DATE AUTHOR CHANGE/COMMENT * ──────────────────────────────────———————————————————————— * （产品版本号） 2012-4-23 duweibin create */public class MtScrollView extends ScrollView {private static final int MAX_Y_OVERSCROLL_DISTANCE = 200; private Context mContext; private int mMaxYOverscrollDistance; public MtScrollView(Context context){ super(context); mContext = context; initBounceListView(); } public MtScrollView(Context context, AttributeSet attrs){ super(context, attrs); mContext = context; initBounceListView(); } public MtScrollView(Context context, AttributeSet attrs, int defStyle){ super(context, attrs, defStyle); mContext = context; initBounceListView(); } private void initBounceListView(){ final DisplayMetrics metrics = mContext.getResources().getDisplayMetrics(); final float density = metrics.density; mMaxYOverscrollDistance = (int) (density * MAX_Y_OVERSCROLL_DISTANCE); } @Override protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent){ //这块是关键性代码 return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, mMaxYOverscrollDistance, isTouchEvent); }}