android 仿知乎sildmenu实现先上一张效果图
强化后效果图处理viewpager与scroollview滑动冲突
slidmenu实现原理
slidmenu的实现思路是模仿张鸿洋大神的方法实现的 1.自定义sildview继承HorizontalScrollView 2.重写ontouchevent,onlayout,onscrollchanged方法 期间要理解onscollto onsmoothscrollto setTranslationX方法
slidmenu代码package com.cust.myview;import android.annotation.SuppressLint;import android.content.Context;import android.util.AttributeSet;import android.util.DisplayMetrics;import android.util.TypedValue;import android.view.MotionEvent;import android.view.ViewGroup;import android.view.WindowManager;import android.widget.HorizontalScrollView;import android.widget.LinearLayout;{private int ScreenWidth;private int menuWidth;private ViewGroup menu;private ViewGroup content;private LinearLayout warp;private int paddingright;private boolean once=true;private boolean isopen=false;public sildmenu(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);WindowManager wm=(WindowManager)context.getSystemService(context.WINDOW_SERVICE);//获取屏幕宽度DisplayMetrics dm=new DisplayMetrics();wm.getDefaultDisplay().getMetrics(dm);ScreenWidth=dm.widthPixels;paddingright=(int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100,context.getResources().getDisplayMetrics());}public sildmenu(Context context, AttributeSet attrs) {this(context, attrs,0);}public sildmenu(Context context) {this(context, null);}(){if(isopen){this.smoothScrollTo(menuWidth, 0);isopen=false;return;}else{this.smoothScrollTo(0, 0);isopen=true;return;}}(MotionEvent ev) {super.onTouchEvent(ev);int action=ev.getAction();int x=(int)ev.getX();switch(action){case MotionEvent.ACTION_DOWN:if(x>50&&!isopen){return false;}else{return true;}case MotionEvent.ACTION_MOVE:break;case MotionEvent.ACTION_UP:if(this.getScrollX()>menuWidth/2){this.smoothScrollTo(menuWidth,0);isopen=false;}else{this.smoothScrollTo(0,0);isopen=true;}return true;}return super.onTouchEvent(ev);}(int widthMeasureSpec, int heightMeasureSpec) {if(once){warp=(LinearLayout)this.getChildAt(0);menu=(ViewGroup)warp.getChildAt(0);content=(ViewGroup)warp.getChildAt(1);content.getLayoutParams().width=ScreenWidth;menuWidth=menu.getLayoutParams().width=ScreenWidth-paddingright;once=false;}super.onMeasure(widthMeasureSpec, heightMeasureSpec);}(boolean changed, int l, int t, int r, int b) {super.onLayout(changed, l, t, r, b);if(changed){this.scrollTo(menuWidth, 0);}}(int l, int t, int oldl, int oldt) {content.getChildAt(0).setTranslationX(l-menuWidth);float alpha=l/menuWidth*0.5f+0.5f;content.setAlpha(alpha);super.onScrollChanged(l, t, oldl, oldt);}}sildmenu强化
有时会遇到这样的一个情况 我们的fragment中有个viewpager咋办 它显然会和scrollview发生滑动冲突 如何解决呢 很简单只需在自定义sildmenu重写onInterceptTouchEvent(MotionEvent ev)事件即可 告诉子布局我来处理你不用处理了或者我不处理了你处理吧
(MotionEvent ev) {super.onInterceptTouchEvent( ev);int x=(int)ev.getX();if(x>50&&!isopen){;}.onInterceptTouchEvent( ev);}
，人生没有彩排，每一天都是现场直播
