First look at the code ：
[java]?[view plain]( )[copy]( )[print]( )[?]( )
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package?com.xys.flexible;??
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import?android.content.Context;??
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import?android.util.AttributeSet;??
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import?android.util.DisplayMetrics;??
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import?android.widget.ScrollView;??
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public?class?FlexibleScrollView?extends?ScrollView?{??
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????private?Context?mContext;??
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????private?static?int?mMaxOverDistance?=?50;??
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????public?FlexibleScrollView(Context?context,?AttributeSet?attrs,??
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????????????int?defStyleAttr)?{??
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????????super(context,?attrs,?defStyleAttr);??
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????????this.mContext?=?context;??
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????????initView();??
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????}??
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????public?FlexibleScrollView(Context?context,?AttributeSet?attrs)?{??
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????????super(context,?attrs);??
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????????this.mContext?=?context;??
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????????initView();??
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????}??
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????public?FlexibleScrollView(Context?context)?{??
- ????????supe
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r(context);??
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????????this.mContext?=?context;??
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????????initView();??
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????}??
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????private?void?initView()?{??
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????????DisplayMetrics?metrics?=?mContext.getResources().getDisplayMetrics();??
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????????float?density?=?metrics.density;??
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????????mMaxOverDistance?=?(int)?(density?*?mMaxOverDistance);??
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????}??
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????protected?boolean?overScrollBy(int?deltaX,?int?deltaY,?int?scrollX,??
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????????????int?scrollY,?int?scrollRangeX,?int?scrollRangeY,??
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????????????int?maxOverScrollX,?int?maxOverScrollY,?boolean?isTouchEvent)?{??
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????????return?super.overScrollBy(deltaX,?deltaY,?scrollX,?scrollY,??
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????????????????scrollRangeX,?scrollRangeY,?maxOverScrollX,?mMaxOverDistance,??
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????????????????isTouchEvent);??
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????}??
- }??
In fact, although we have rewritten ScrollView（ perhaps ListView）, But only one value of one of its methods has been changed ！
Also is to overScrollBy Medium maxOverScrollY It's changed to our own values .
Test layout ：
[html]?[view plain]( )[copy]( )[print]( )[?]( )
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<RelativeLayout?xmlns:android\=" http://schemas.android.com/apk/res/android"??
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????xmlns:tools\=" http://schemas.android.com/tools"??
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????android:layout_width\="match_parent"??
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????android:layout_height\="match_parent"??
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????android:paddingBottom\="@dimen/activity_vertical_margin"??
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????android:paddingLeft\="@dimen/activity_horizontal_margin"??
- ????android:paddingRight\="@dimen/activity_horizontal_margin"??
Last
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