public class GestureHandler {}

//屏幕寬高
int sWidth = 1280;
int sHeight = 720;
//按下的點
PointF down;
//Y軸滑動的區(qū)間
float minY, maxY;
//按下時的時間
long downTime;
//邊緣判定距離，
double margin = sWidth * 0.035;
//Y軸最大區(qū)間范圍，即Y軸滑動超出這個范圍不觸發(fā)事件
double height = sHeight * 0.2;
//X軸最短滑動距離 X軸滑動范圍低于此值不觸發(fā)事件
double width = sWidth * 0.1;
//是否處于此次滑動事件
boolean work = false;

public boolean point(PointF up) {
  long upTime = System.currentTimeMillis();
  float tWidth = Math.abs(down.x - up.x);
  if (maxY - minY < height && tWidth > width && (upTime - downTime) / tWidth < 2.5) {
   //起點在左邊
   if (down.x < margin) {
    left();//左滑需要處理的邏輯的方法
    return true;
   }
   
  }
  return false;
 }

public boolean doEventF(MotionEvent event) {
   switch (event.getActionMasked()) {
   case MotionEvent.ACTION_DOWN:
    //記錄下按下的點
    downTime = System.currentTimeMillis();
    down = new PointF(event.getX(), event.getY());
    minY = maxY = down.y;
    //判定是否處于邊緣側(cè)滑
    if (down.x < margin || (sWidth - down.x) < margin) work = true;
    break;
   case MotionEvent.ACTION_MOVE:
    //記錄滑動Y軸區(qū)間
    if (work)
     if (event.getY() > down.y) {
      maxY = event.getY();
     } else {
      minY = event.getY();
      }
    break;
   case MotionEvent.ACTION_UP:
    if (work) {
     handle(new PointF(event.getX(), event.getY()));
     work = false;
     return true;
    }
    work = false;
  }
  
  return work;
 }

public void left() {
 
  //處理左邊緣滑動事件，這里你可以自己寫一個ActivityUtil，用來finish當前的activity（這個網(wǎng)上很多，隨便搜一下就有了）
   
}

/** 手勢監(jiān)聽 */
 GestureHandler mGestureHandler;
 /** 是否需要監(jiān)聽手勢關(guān)閉功能 */
 private boolean mNeedBackGesture = false;

@Override
 public boolean dispatchTouchEvent(MotionEvent event){
  //TODO Auto-generated method stub
  if (mNeedBackGesture){
   return mGestureHandler.doEventF(event) || super.dispatchTouchEvent(event);
  }
  return super.dispatchTouchEvent(event);
 }

public final void setNeedBackGesture(boolean mNeedBackGesture){
  this.mNeedBackGesture = mNeedBackGesture;
 }