Android(安卓)向右滑动关闭页面

前言：

用最简单的例子来说明此问题。

1.在Activity中加上默认的布局Layout

2.在自定义的Layout中实现右滑关闭Activity的逻辑

直接上代码！

自定义的布局HFFinishRelativeLayout！

package com.huofar.widget;import android.content.Context;import android.content.res.TypedArray;import android.support.v4.app.FragmentActivity;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.ViewGroup;import android.widget.RelativeLayout;import com.huofar.util.LogUtil;/** * Created by zhangxiwei on 14/11/25. */public class HFFinishRelativeLayout extends RelativeLayout{    private static final String TAG = LogUtil.makeLogTag(HFFinishRelativeLayout.class);    public interface ScrollLeftFinishListener{        public void finishPage();    }    FragmentActivity activity;    private ScrollLeftFinishListener scrollLeftFinishListener;    public void setScrollLeftFinishListener(ScrollLeftFinishListener scrollLeftFinishListener) {        this.scrollLeftFinishListener = scrollLeftFinishListener;    }    // 滑动距离及坐标    private float xDistance, yDistance, xLast, yLast;    public HFFinishRelativeLayout(Context context) {        super(context);    }    public HFFinishRelativeLayout(Context context, AttributeSet attrs) {        super(context, attrs);    }    public void attachToActivity(FragmentActivity activity) {        this.activity = activity;        TypedArray a = activity.getTheme().obtainStyledAttributes(                new int[] { android.R.attr.windowBackground });        int background = a.getResourceId(0, 0);        a.recycle();        ViewGroup decor = (ViewGroup) activity.getWindow().getDecorView();        ViewGroup decorChild = (ViewGroup) decor.getChildAt(0);        decorChild.setBackgroundResource(background);        decor.removeView(decorChild);        addView(decorChild);        decor.addView(this);    }    @Override    public boolean onInterceptTouchEvent(MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                break;            case MotionEvent.ACTION_MOVE:        }        return super.onInterceptTouchEvent(event);    }

    @Override

    public boolean dispatchTouchEvent(MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                xDistance = yDistance = 0f;                xLast = event.getX();                yLast = event.getY();                break;            case MotionEvent.ACTION_MOVE:                final float curX = event.getX();                final float curY = event.getY();                xDistance += Math.abs(curX - xLast);                yDistance += Math.abs(curY - yLast);                if (curX > xLast && xDistance > yDistance && xDistance > 300) {                    if(scrollLeftFinishListener != null){                        xLast = curX;                        yLast = curY;                        scrollLeftFinishListener.finishPage();                        return true;                    }                }                xLast = curX;                yLast = curY;        }        return super.dispatchTouchEvent(event);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                break;            case MotionEvent.ACTION_MOVE:                break;        }        return true;    }}

重点观看上面的红色加粗字段。

我处理的是每次滑动向右滑动300px执行关闭操作，在需要的使用的Activity实现借口直接finish就OK了！

Activity中的调用：

package com.huofar.activity;import android.os.Bundle;import android.os.Handler;import android.support.v4.app.FragmentActivity;import android.view.LayoutInflater;import com.huofar.R;import com.huofar.widget.HFFinishRelativeLayout;/** * Created by zhangxiwei on 14/11/25. */public class HFBaseActivity extends FragmentActivity implements HFFinishRelativeLayout.ScrollLeftFinishListener  {    private boolean isFinishScrollLeft;    HFFinishRelativeLayout hfFinishRelativeLayout;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        isFinishScrollLeft = true;        //延后为了等待需要屏蔽返回滑动接受参数        new Handler().postAtTime(new Runnable() {            @Override            public void run() {                setFinishScrollLeft(isFinishScrollLeft);            }        },1000);    }    public void setFinishScrollLeft(boolean isFinishScrollLeft) {        this.isFinishScrollLeft = isFinishScrollLeft;        if(isFinishScrollLeft){            if(isFinishScrollLeft) {                hfFinishRelativeLayout = (HFFinishRelativeLayout) LayoutInflater.from(this).inflate(                        R.layout.activity_finish_base, null);                hfFinishRelativeLayout.attachToActivity(this);                hfFinishRelativeLayout.setScrollLeftFinishListener(this);            }        }    }    @Override    public void finishPage() {        finish();    }}

所有的代码就是这点，延迟一秒的就是为了接受isFinishScrollLeft变量，我是在已有的工程中修改的，就是为了在有些页面不需要关闭传此变量就OK了！。方法有点笨。大家有好方法可以提供。先多谢！

接下来就是头疼的问题，为什么要这么做：

恶补知识：1.dispatchTouchEvent 2.onInterceptTouchEvent 3.onTouchEvent 传递事件直接给你们来个学习地址

http://www.cnblogs.com/sunzn/archive/2013/05/10/3064129.html

除此之外看的迷迷糊糊的可以自己写一个demo实践一下或者多google几个介绍看看，就是事件的传递，然后在dispatchTouchEvent接受一下。然后直接关闭就行。

其实也没有什么，帮助想要该功能的童鞋。

有什么问题可以跟帖询问。

补上activity_finish_base.xml

<?xml version="1.0" encoding="utf-8"?>

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