Android中Activity滑动关闭的效果

package com.ekeguan.slidingfinishdemo;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
 private Button button;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  initView();
  initEventListener();
 }
 private void initView() {
  button = (Button) findViewById(R.id.button);
 }
 private void initEventListener() {
  button.setOnClickListener(this);
 }
 @Override
 public void onClick(View view) {
  switch(view.getId())
  {
   case R.id.button:
    startActivity(new Intent(MainActivity.this,SecondActivity.class));
    break;
   default:
    break;
  }
 }
}

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

 

package com.ekeguan.slidingfinishdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class SecondActivity extends AppCompatActivity {
 private SildingFinishLayout mSildingFinishLayout;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_second);
  initView();
  initEventListener();
 }
 private void initView() {
  mSildingFinishLayout = (SildingFinishLayout) findViewById(R.id.sildingFinishLayout);
  mSildingFinishLayout.setTouchView(mSildingFinishLayout);
 }
 private void initEventListener() {
  mSildingFinishLayout
    .setOnSildingFinishListener(new SildingFinishLayout.OnSildingFinishListener() {
     @Override
     public void onSildingFinish() {
      finish();
     }
    });
 }
}

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

 
  
 

package com.ekeguan.slidingfinishdemo;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.Scroller;
/**
 * 自定义可以滑动的RelativeLayout, 类似于IOS的滑动删除页面效果，当我们要使用
 * 此功能的时候，需要将该Activity的顶层布局设置为SildingFinishLayout，
 * 然后需要调用setTouchView()方法来设置需要滑动的View
 *
 * @author xiaanming
 *
 * @blog http://blog.csdn.net/xiaanming
 *
 */
public class SildingFinishLayout extends RelativeLayout implements
  OnTouchListener {
 /**
  * SildingFinishLayout布局的父布局
  */
 private ViewGroup mParentView;
 /**
  * 处理滑动逻辑的View
  */
 private View touchView;
 /**
  * 滑动的最小距离
  */
 private int mTouchSlop;
 /**
  * 按下点的X坐标
  */
 private int downX;
 /**
  * 按下点的Y坐标
  */
 private int downY;
 /**
  * 临时存储X坐标
  */
 private int tempX;
 /**
  * 滑动类
  */
 private Scroller mScroller;
 /**
  * SildingFinishLayout的宽度
  */
 private int viewWidth;
 /**
  * 记录是否正在滑动
  */
 private boolean isSilding;
 private OnSildingFinishListener onSildingFinishListener;
 private boolean isFinish;
 public SildingFinishLayout(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }
 public SildingFinishLayout(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
  mScroller = new Scroller(context);
 }
 @Override
 protected void onLayout(boolean changed, int l, int t, int r, int b) {
  super.onLayout(changed, l, t, r, b);
  if (changed) {
   // 获取SildingFinishLayout所在布局的父布局
   mParentView = (ViewGroup) this.getParent();
   viewWidth = this.getWidth();
  }
 }
 /**
  * 设置OnSildingFinishListener, 在onSildingFinish()方法中finish Activity
  *
  * @param onSildingFinishListener
  */
 public void setOnSildingFinishListener(
   OnSildingFinishListener onSildingFinishListener) {
  this.onSildingFinishListener = onSildingFinishListener;
 }
 /**
  * 设置Touch的View
  *
  * @param touchView
  */
 public void setTouchView(View touchView) {
  this.touchView = touchView;
  touchView.setOnTouchListener(this);
 }
 public View getTouchView() {
  return touchView;
 }
 /**
  * 滚动出界面
  */
 private void scrollRight() {
  final int delta = (viewWidth + mParentView.getScrollX());
  // 调用startScroll方法来设置一些滚动的参数，我们在computeScroll()方法中调用scrollTo来滚动item
  mScroller.startScroll(mParentView.getScrollX(), 0, -delta + 1, 0,
    Math.abs(delta));
  postInvalidate();
 }
 /**
  * 滚动到起始位置
  */
 private void scrollOrigin() {
  int delta = mParentView.getScrollX();
  mScroller.startScroll(mParentView.getScrollX(), 0, -delta, 0,
    Math.abs(delta));
  postInvalidate();
 }
 /**
  * touch的View是否是AbsListView， 例如ListView, GridView等其子类
  *
  * @return
  */
 private boolean isTouchOnAbsListView() {
  return touchView instanceof AbsListView ? true : false;
 }
 /**
  * touch的view是否是ScrollView或者其子类
  *
  * @return
  */
 private boolean isTouchOnScrollView() {
  return touchView instanceof ScrollView ? true : false;
 }
 @Override
 public boolean onTouch(View v, MotionEvent event) {
  switch (event.getAction()) {
   case MotionEvent.ACTION_DOWN:
    downX = tempX = (int) event.getRawX();
    downY = (int) event.getRawY();
    break;
   case MotionEvent.ACTION_MOVE:
    int moveX = (int) event.getRawX();
    int deltaX = tempX - moveX;
    tempX = moveX;
    if (Math.abs(moveX - downX) > mTouchSlop
      && Math.abs((int) event.getRawY() - downY) < mTouchSlop) {
     isSilding = true;
     // 若touchView是AbsListView，
     // 则当手指滑动，取消item的点击事件，不然我们滑动也伴随着item点击事件的发生
     if (isTouchOnAbsListView()) {
      MotionEvent cancelEvent = MotionEvent.obtain(event);
      cancelEvent
        .setAction(MotionEvent.ACTION_CANCEL
          | (event.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
      v.onTouchEvent(cancelEvent);
     }
    }
    if (moveX - downX >= 0 && isSilding) {
     mParentView.scrollBy(deltaX, 0);
     // 屏蔽在滑动过程中ListView ScrollView等自己的滑动事件
     if (isTouchOnScrollView() || isTouchOnAbsListView()) {
      return true;
     }
    }
    break;
   case MotionEvent.ACTION_UP:
    isSilding = false;
    if (mParentView.getScrollX() <= -viewWidth / 2) {
     isFinish = true;
     scrollRight();
    } else {
     scrollOrigin();
     isFinish = false;
    }
    break;
  }
  // 假如touch的view是AbsListView或者ScrollView 我们处理完上面自己的逻辑之后
  // 再交给AbsListView, ScrollView自己处理其自己的逻辑
  if (isTouchOnScrollView() || isTouchOnAbsListView()) {
   return v.onTouchEvent(event);
  }
  // 其他的情况直接返回true
  return true;
 }
 @Override
 public void computeScroll() {
  // 调用startScroll的时候scroller.computeScrollOffset()返回true，
  if (mScroller.computeScrollOffset()) {
   mParentView.scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
   postInvalidate();
   if (mScroller.isFinished()) {
    if (onSildingFinishListener != null && isFinish) {
     onSildingFinishListener.onSildingFinish();
    }
   }
  }
 }
 public interface OnSildingFinishListener {
  public void onSildingFinish();
 }
}