Android侦测滑动手势方法

1、Android滑动手势侦测方法介绍时间：2010-12-01 09:05 来源：51 收藏 复制分享 共有评论(0)条在Android手机操作系统中支持各种滑动手势的操作。我们在这里为大家介绍的方法主要就是针对这些手势如何能在Android平台中侦测出来。下面就让我们大家一起来看看Android滑动手势具体的识别方法吧。Android Activity跳转相关操作技巧分享Android创建sdcard详细图解Android系统信息查看方法详解Android数据库相关代码解读Android拍照实现方式概述Android SDK提供了一个listener类来侦测各种不同的手势:Sim

2、pleOnGestureListener. 你只需要实现自己所关心的手势就可以了.Swipe在android里面是叫Fling首先创建自己的一个手势detector类:class MyGestureDetector extends SimpleOnGestureListener Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) 一个Android滑动手势有几个特征, 比如是在x或者y轴上近乎直线的划动, 中途路径的偏差不能太大, 而且划动需要一定的速

3、度, 所以我们定义几个定量:private static final int SWIPE_MIN_DISTANCE = 120; private static final int SWIPE_MAX_OFF_PATH = 250; private static final int SWIPE_THRESHOLD_VELOCITY = 200;然后在onFling方法中, 判断是不是一个合理的swipe动作:if(e1.getX() - e2.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE_THRESHOLD_VELOCITY) vie

4、wFlipper.setInAnimation(slideLeftIn); viewFlipper.setOutAnimation(slideLeftOut); viewFlipper.showNext(); else if (e2.getX() - e1.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE_THRESHOLD_VELOCITY) viewFlipper.setInAnimation(slideRightIn); viewFlipper.setOutAnimation(slideRightOut); viewFlipper

5、.showPrevious(); if(e1.getX() - e2.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE_THRESHOLD_VELOCITY) viewFlipper.setInAnimation(slideLeftIn); viewFlipper.setOutAnimation(slideLeftOut); viewFlipper.showNext(); else if (e2.getX() - e1.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE_THRES

6、HOLD_VELOCITY) viewFlipper.setInAnimation(slideRightIn); viewFlipper.setOutAnimation(slideRightOut); viewFlipper.showPrevious(); 这里的viewFlipper是含有多个view的一个container, 可以很方便的调用prev/next view, 加上animation动画, 可以达到一些不错的效果:viewFlipper = (ViewFlipper)findViewById(R.id.flipper); slideLeftIn = AnimationUtils

7、.loadAnimation(this, R.anim.slide_left_in); slideLeftOut = AnimationUtils.loadAnimation(this, R.anim.slide_left_out); slideRightIn = AnimationUtils.loadAnimation(this, R.anim.slide_right_in); slideRightOut = AnimationUtils.loadAnimation(this, R.anim.slide_right_out);自定义的animation可以查看具体的XML, 比如从左边进来的

8、一个动画: 当然最后不要忘记在你的Activity中override onTouch方法来获取手势action:Override public boolean onTouchEvent(MotionEvent event) if (gestureDetector.onTouchEvent(event) return true; else return false; Android滑动手势的相关识别方法就为大家介绍到这里。Android滑动手势侦测方法介绍时间：2010-12-01 09:05 来源：51 收藏 复制分享 共有评论(0)条在Android手机操作系统中支持各种滑动手

9、势的操作。我们在这里为大家介绍的方法主要就是针对这些手势如何能在Android平台中侦测出来。下面就让我们大家一起来看看Android滑动手势具体的识别方法吧。Android Activity跳转相关操作技巧分享Android创建sdcard详细图解Android系统信息查看方法详解Android数据库相关代码解读Android拍照实现方式概述Android SDK提供了一个listener类来侦测各种不同的手势:SimpleOnGestureListener. 你只需要实现自己所关心的手势就可以了.Swipe在android里面是叫Fling首先创建自己的一个手势detector类:clas

10、s MyGestureDetector extends SimpleOnGestureListener Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) 一个Android滑动手势有几个特征, 比如是在x或者y轴上近乎直线的划动, 中途路径的偏差不能太大, 而且划动需要一定的速度, 所以我们定义几个定量:private static final int SWIPE_MIN_DISTANCE = 120; private static final in

11、t SWIPE_MAX_OFF_PATH = 250; private static final int SWIPE_THRESHOLD_VELOCITY = 200;然后在onFling方法中, 判断是不是一个合理的swipe动作:if(e1.getX() - e2.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE_THRESHOLD_VELOCITY) viewFlipper.setInAnimation(slideLeftIn); viewFlipper.setOutAnimation(slideLeftOut); viewFli

12、pper.showNext(); else if (e2.getX() - e1.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE_THRESHOLD_VELOCITY) viewFlipper.setInAnimation(slideRightIn); viewFlipper.setOutAnimation(slideRightOut); viewFlipper.showPrevious(); if(e1.getX() - e2.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE

13、_THRESHOLD_VELOCITY) viewFlipper.setInAnimation(slideLeftIn); viewFlipper.setOutAnimation(slideLeftOut); viewFlipper.showNext(); else if (e2.getX() - e1.getX() SWIPE_MIN_DISTANCE & Math.abs(velocityX) SWIPE_THRESHOLD_VELOCITY) viewFlipper.setInAnimation(slideRightIn); viewFlipper.setOutAnimation(sli

14、deRightOut); viewFlipper.showPrevious(); 这里的viewFlipper是含有多个view的一个container, 可以很方便的调用prev/next view, 加上animation动画, 可以达到一些不错的效果:viewFlipper = (ViewFlipper)findViewById(R.id.flipper); slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_left_in); slideLeftOut = AnimationUtils.loadAnimation(

15、this, R.anim.slide_left_out); slideRightIn = AnimationUtils.loadAnimation(this, R.anim.slide_right_in); slideRightOut = AnimationUtils.loadAnimation(this, R.anim.slide_right_out);自定义的animation可以查看具体的XML, 比如从左边进来的一个动画: 当然最后不要忘记在你的Activity中override onTouch方法来获取手势action:Override public boolean onTouchE

16、vent(MotionEvent event) if (gestureDetector.onTouchEvent(event) return true; else return false; Android滑动手势的相关识别方法就为大家介绍到这里。android滑动分页 实现原理通过手指的滑动,判断数据大小然后动态改变数据底部的加载是一个viewimport android.app.ListActivity;import android.os.Bundle;import android.os.Handler;import android.view.Gravity;import android.

17、view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.AbsListView.OnScrollListener;import an

18、droid.widget.LinearLayout.LayoutParams;public class Test extends ListActivity implements OnScrollListener Aleph0 adapter = new Aleph0(); int lastItem = 0; int mProgressStatus = 0; private Handler mHandler = new Handler(); ProgressBar progressBar; protected void onCreate(Bundle savedInstanceState) su

19、per.onCreate(savedInstanceState); LinearLayout searchLayout = new LinearLayout(this); searchLayout.setOrientation(LinearLayout.HORIZONTAL); progressBar = new ProgressBar(this); progressBar.setPadding(0, 0, 15, 0); searchLayout.addView(progressBar,new LinearLayout.LayoutParams( LinearLayout.LayoutPar

20、ams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT ); TextView textView = new TextView(this); textView.setText(加载中.); textView.setGravity(Gravity.CENTER_VERTICAL); searchLayout.addView(textView,new LinearLayout.LayoutParams( LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL

21、_PARENT ); searchLayout.setGravity(Gravity.CENTER); LinearLayout loadingLayout = new LinearLayout(this); loadingLayout.addView(searchLayout,new LinearLayout.LayoutParams( LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT ); loadingLayout.setGravity(Gravity.CENTER); getLi

22、stView().addFooterView(loadingLayout); / Start lengthy operation in a background thread/ new Thread(new Runnable() / public void run() / while (mProgressStatus = totalCount; if (loadMore) adapter.count += visibleCount; / or any other amount adapter.notifyDataSetChanged(); public void onScrollStateCh

23、anged(AbsListView v, int s) class Aleph0 extends BaseAdapter int count = 40 ; /* starting amount */ public int getCount() return count; public Object getItem( int pos) return pos; public long getItemId( int pos) return pos; public View getView( int pos, View v, ViewGroup p) TextView view = new TextV

24、iew(EndLessActivity. this ); view.setText( entry + pos); return view; listview下部是按钮控制：package com.ScrollListView;import Android.app.ListActivity;import Android.os.Bundle;import Android.view.Gravity;import Android.view.View;import Android.view.ViewGroup;import Android.widget.AbsListView;import Androi

25、d.widget.BaseAdapter;import Android.widget.Button;import Android.widget.LinearLayout;import Android.widget.ProgressBar;import Android.widget.TextView;import Android.widget.AbsListView.OnScrollListener;public class EndLessActivity extends ListActivity Aleph0 adapter = new Aleph0(); int mProgressStatu

26、s = 0 ; protected void onCreate(Bundle savedInstanceState) super .onCreate(savedInstanceState); LinearLayout searchLayout = new LinearLayout( this ); searchLayout.setOrientation(LinearLayout.HORIZONTAL); Button textView = new Button( this ); textView.setText( 加载中. ); textView.setGravity(Gravity.CENT

27、ER_VERTICAL); searchLayout.addView(textView, new LinearLayout.LayoutParams( LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT ); searchLayout.setGravity(Gravity.CENTER); LinearLayout loadingLayout = new LinearLayout( this ); loadingLayout.addView(searchLayout, new LinearLayout.LayoutParams( LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT ); loadingLayout.setGravity