android 左滑删除自动恢复,android实现简单左滑删除控件

╰半橙微兮° 2022-10-16 05:51 168阅读 0赞

本文为大家分享了一个简单的android左滑删除控件，供大家参考，具体内容如下

import android.animation.ValueAnimator;

import android.content.Context;

import android.graphics.PointF;

import android.support.v4.view.ViewConfigurationCompat;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewConfiguration;

import android.view.ViewGroup;

public class SwipeLayout extends ViewGroup\{

public static String TAG = "SwipeLayout";

//可以滚动的距离

int mSwipeWidth;

PointF firstPoint;

PointF lastPoint;

float mTouchSlop;

ValueAnimator openAnimator;

ValueAnimator closeAnimator;

public SwipeLayout(Context context) \{

this(context,null);

public SwipeLayout(Context context, AttributeSet attrs) \{

super(context, attrs);

mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(ViewConfiguration.get(getContext()));

@Override

protected void onLayout(boolean changed, int l, int t, int r, int b) \{

int left=0;

int childCount = getChildCount();

for (int i=0;i

View child = getChildAt(i);

//按顺序从左往右排

// if (i==0)\{

// child.layout(0,0,child.getMeasuredWidth(),child.getMeasuredHeight());

// \}else \{

child.layout(left,0,left+child.getMeasuredWidth(),child.getMeasuredHeight());

// \}

left += child.getMeasuredWidth();

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) \{

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

int childCount = getChildCount();

View mainChild = getChildAt(0);

int width=0;

int height=0;

mSwipeWidth = 0;

// measureChild(mainChild,widthMeasureSpec,heightMeasureSpec);

measure(widthMeasureSpec,heightMeasureSpec);

//滑动距离是 从index开始 所有控件的宽度之和

if (childCount>1) \{

for (int i = 1; i < childCount; ++i) \{

mSwipeWidth += getChildAt(i).getMeasuredWidth();

int widthMode = MeasureSpec.getMode(widthMeasureSpec);

int widthValue = MeasureSpec.getSize(widthMeasureSpec);

int heightMode = MeasureSpec.getMode(heightMeasureSpec);

int heightValue = MeasureSpec.getSize(heightMeasureSpec);

switch (heightMode)\{

case MeasureSpec.AT\_MOST:

case MeasureSpec.UNSPECIFIED:

//没有指定大小 按照第一个子控件的大小来设置

height = mainChild.getMeasuredHeight();

break;

case MeasureSpec.EXACTLY:

height = heightValue;

break;

switch (widthMode)\{

case MeasureSpec.AT\_MOST:

case MeasureSpec.UNSPECIFIED:

//没有指定大小 按照第一个子控件的大小来设置

width = mainChild.getMeasuredWidth();

break;

case MeasureSpec.EXACTLY:

width = widthValue;

break;

// for (int i=1;i

// measureChild(getChildAt(i),widthMeasureSpec,MeasureSpec.makeMeasureSpec(height,MeasureSpec.EXACTLY));

// \}

setMeasuredDimension(width,height);

@Override

public boolean dispatchTouchEvent(MotionEvent ev) \{

return super.dispatchTouchEvent(ev);

@Override

public boolean onInterceptTouchEvent(MotionEvent ev) \{

switch (ev.getAction())\{

case MotionEvent.ACTION\_DOWN:

firstPoint = new PointF(ev.getX(),ev.getY());

lastPoint = new PointF(ev.getX(),ev.getY());

break;

case MotionEvent.ACTION\_MOVE:

float moveDistance = ev.getX()-firstPoint.x;

//移动距离大于制定值 认为进入控件的滑动模式

if (Math.abs(moveDistance) > mTouchSlop )\{

//让父控件不拦截我们的事件

getParent().requestDisallowInterceptTouchEvent(true);

//拦截事件

return true;

return super.onInterceptTouchEvent(ev);

@Override

public boolean onTouchEvent(MotionEvent ev) \{

switch (ev.getAction())\{

case MotionEvent.ACTION\_MOVE:

float moveDistance = ev.getX()-lastPoint.x;

lastPoint = new PointF(ev.getX(),ev.getY());

// 这里要注意 x大于0的时候 往左滑动 小于0往右滑动

scrollBy((int) -moveDistance ,0);

//边界判定 超过了边界 直接设置为边界值

if (getScrollX()> mSwipeWidth)\{

scrollTo(mSwipeWidth,0);

\}else if (getScrollX()<0)\{

scrollTo(0,0);

break;

case MotionEvent.ACTION\_UP:

//没动 不理他

if (getScrollX()== mSwipeWidth ||getScrollX()==0)\{

return false;

float distance = ev.getX()-firstPoint.x;

//滑动距离超过 可滑动距离指定值 继续完成滑动

if (Math.abs(distance) > mSwipeWidth \*0.3 )\{

if (distance>0)\{

smoothClose();

\}else if (distance<0)\{

smoothOpen();

\}else \{

if (distance>0)\{

smoothOpen();

\}else if (distance<0)\{

smoothClose();

return true;

return super.onTouchEvent(ev);

public void smoothOpen()\{

clearAnimator();

openAnimator = ValueAnimator.ofInt(getScrollX(), mSwipeWidth);

openAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() \{

@Override

public void onAnimationUpdate(ValueAnimator animation) \{

Integer integer = (Integer) animation.getAnimatedValue();

scrollTo(integer,0);

\});

openAnimator.start();

public void smoothClose()\{

clearAnimator();

closeAnimator = ValueAnimator.ofInt(getScrollX(),0);

closeAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() \{

@Override

public void onAnimationUpdate(ValueAnimator animation) \{

Integer integer = (Integer) animation.getAnimatedValue();

scrollTo(integer,0);

\});

closeAnimator.start();

public void open()\{

scrollTo(mSwipeWidth,0);

public void close()\{

scrollTo(0,0);

//执行滑动动画必须先清除动画 不然会鬼畜

private void clearAnimator()\{

if (closeAnimator!=null && closeAnimator.isRunning())\{

closeAnimator.cancel();

closeAnimator = null;

if (openAnimator!=null && openAnimator.isRunning()) \{

openAnimator.cancel();

openAnimator = null;

public void toggle()\{

if (getScrollX()==0)\{

open();

\}else \{

close();

使用

android:id="@+id/swipeLayout"

android:layout\_width="200dp"

android:layout\_height="wrap\_content"

android:background="\#F3F3F3"

android:id="@+id/btn"

android:text="123"

android:layout\_width="match\_parent"

android:layout\_height="50dp" />

android:background="\#FF0000"

android:text="shanchu"

android:layout\_width="80dp"

android:layout\_height="match\_parent" />

android:gravity="center"

android:textAlignment="center"

android:background="\#0F0"

android:text="123"

android:layout\_width="30dp"

android:layout\_height="match\_parent" />

效果

![2b3ad0bdee6541c4e518d51a1c0d01d0.png][]

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

[2b3ad0bdee6541c4e518d51a1c0d01d0.png]: /images/20221014/2c63bf5c691142e1ace82c3ff65841fe.png

android 左滑删除自动恢复,android实现简单左滑删除控件

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