android —— 自定义控件 竖向的ViewPager，上下滑动的组件，android上下滑动 VerticalPager
16lz
2021-01-23
package com.zhulin.android.atools; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.VelocityTracker; import android.view.View; import android.view.ViewGroup; import android.view.animation.Interpolator; import android.widget.Scroller; import android.widget.Toast; public class VerticalPager extends ViewGroup{ private Scroller mScroller; private Context mContext; public VerticalPager(Context context, AttributeSet attrs) { super(context, attrs); this.mContext=context; mScroller=new Scroller(context); // mScroller=new Scroller(mContext, new Interpolator() { // // @Override // public float getInterpolation(float input) { // return 300; // } // }); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int totalHeight=0; int count=getChildCount(); for(int i=0;i<count;i++){ View childView=getChildAt(i); // int measureHeight=childView.getMeasuredHeight(); // int measureWidth=childView.getMeasuredWidth(); childView.layout(l, totalHeight, r, totalHeight+b); totalHeight+=b; } } private VelocityTracker mVelocityTracker; @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width=MeasureSpec.getSize(widthMeasureSpec); int height=MeasureSpec.getSize(heightMeasureSpec); int count=getChildCount(); for(int i=0;i<count;i++){ getChildAt(i).measure(width, height); } setMeasuredDimension(width, height); } private int mLastMotionY; @Override public boolean onTouchEvent(MotionEvent event) { if(mVelocityTracker==null){ mVelocityTracker=VelocityTracker.obtain(); } mVelocityTracker.addMovement(event); int action=event.getAction(); float y=event.getY(); switch(action){ case MotionEvent.ACTION_DOWN: if(!mScroller.isFinished()){ mScroller.abortAnimation(); } mLastMotionY=(int) y; Log.d("montion", ""+getScrollY()); break; case MotionEvent.ACTION_MOVE: int deltaY=(int) (mLastMotionY-y); scrollBy(0,deltaY); //mScroller.startScroll(0, getScrollY(), 0, deltaY); invalidate(); mLastMotionY=(int) y; break; case MotionEvent.ACTION_UP: if(mVelocityTracker!=null){ mVelocityTracker.recycle(); mVelocityTracker=null; } if(getScrollY()<0){ mScroller.startScroll(0, -400, 0, 400); }else if(getScrollY()>(getHeight()*(getChildCount()-1))){ View lastView=getChildAt(getChildCount()-1); mScroller.startScroll(0,lastView.getTop()+300, 0, -300); }else{ int position=getScrollY()/getHeight(); int mod=getScrollY()%getHeight(); if(mod>getHeight()/3){ View positionView=getChildAt(position+1); mScroller.startScroll(0, positionView.getTop()-300, 0, +300); }else{ View positionView=getChildAt(position); mScroller.startScroll(0, positionView.getTop()+300, 0, -300); } } invalidate(); break; // case MotionEvent.ACTION_MASK: // if(getScrollY()<0){ // mScroller.startScroll(0, 0, 0, 0); // }else if(getScrollY()>(getHeight()*(getChildCount()-1)){ // } // invalidate(); // break; } return true; } @Override public void computeScroll() { super.computeScroll(); if(mScroller.computeScrollOffset()){ scrollTo(0, mScroller.getCurrY()); }else{ } } } xml布局[java] view plaincopy<?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <com.zhulin.android.atools.VerticalPager android:id="@+id/vertyPager1" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:background="@drawable/a1" android:id="@+id/textView1" android:layout_width="match_parent" android:layout_height="100dp" android:text="TextView1111" /> <TextView android:background="@drawable/a2" android:id="@+id/textView2" android:layout_width="fill_parent" android:layout_height="100dp" android:text="TextView2222" /> <TextView android:background="@drawable/a3" android:id="@+id/textView3" android:layout_width="fill_parent" android:layout_height="100dp" android:text="TextView2222" /> <TextView android:background="@drawable/a4" android:id="@+id/textView4" android:layout_width="fill_parent" android:layout_height="100dp" android:text="TextView2222" /> </com.zhulin.android.atools.VertyPager> </LinearLayout> 更多相关文章
- android 相对布局
- android之相对布局示例
- Android RelativeLayout 相对布局
- Android创建菜单栏（android布局实现）
- 【Android随记】-- Android动态加载布局
- Android--取得布局中指定控件的宽高
- android计算器布局（TableLayout）
- 四大布局