Android偵測滑動手勢方法

1、Android滑動手勢偵測方法介紹時間：2010-12-01 09:05 來源：51 收藏 復制分享 共有評論(0)條在Android手機操作系統(tǒng)中支持各種滑動手勢的操作。我們在這里為大家介紹的方法主要就是針對這些手勢如何能在Android平臺中偵測出來。下面就讓我們大家一起來看看Android滑動手勢具體的識別方法吧。Android Activity跳轉(zhuǎn)相關(guān)操作技巧分享Android創(chuàng)建sdcard詳細圖解Android系統(tǒng)信息查看方法詳解Android數(shù)據(jù)庫相關(guān)代碼解讀Android拍照實現(xiàn)方式概述Android SDK提供了一個listener類來偵測各種不同的手勢:Sim

2、pleOnGestureListener. 你只需要實現(xiàn)自己所關(guān)心的手勢就可以了.Swipe在android里面是叫Fling首先創(chuàng)建自己的一個手勢detector類:class MyGestureDetector extends SimpleOnGestureListener Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) 一個Android滑動手勢有幾個特征, 比如是在x或者y軸上近乎直線的劃動, 中途路徑的偏差不能太大, 而且劃動需要一定的速

3、度, 所以我們定義幾個定量: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, 判斷是不是一個合理的swipe動作: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(); 這里的viewFlipper是含有多個view的一個container, 可以很方便的調(diào)用prev/next view, 加上animation動畫, 可以達到一些不錯的效果: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);自定義的animation可以查看具體的XML, 比如從左邊進來的

8、一個動畫: 當然最后不要忘記在你的Activity中override onTouch方法來獲取手勢action:Override public boolean onTouchEvent(MotionEvent event) if (gestureDetector.onTouchEvent(event) return true; else return false; Android滑動手勢的相關(guān)識別方法就為大家介紹到這里。Android滑動手勢偵測方法介紹時間：2010-12-01 09:05 來源：51 收藏 復制分享 共有評論(0)條在Android手機操作系統(tǒng)中支持各種滑動手

9、勢的操作。我們在這里為大家介紹的方法主要就是針對這些手勢如何能在Android平臺中偵測出來。下面就讓我們大家一起來看看Android滑動手勢具體的識別方法吧。Android Activity跳轉(zhuǎn)相關(guān)操作技巧分享Android創(chuàng)建sdcard詳細圖解Android系統(tǒng)信息查看方法詳解Android數(shù)據(jù)庫相關(guān)代碼解讀Android拍照實現(xiàn)方式概述Android SDK提供了一個listener類來偵測各種不同的手勢:SimpleOnGestureListener. 你只需要實現(xiàn)自己所關(guān)心的手勢就可以了.Swipe在android里面是叫Fling首先創(chuàng)建自己的一個手勢detector類:clas

10、s MyGestureDetector extends SimpleOnGestureListener Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) 一個Android滑動手勢有幾個特征, 比如是在x或者y軸上近乎直線的劃動, 中途路徑的偏差不能太大, 而且劃動需要一定的速度, 所以我們定義幾個定量: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, 判斷是不是一個合理的swipe動作: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(); 這里的viewFlipper是含有多個view的一個container, 可以很方便的調(diào)用prev/next view, 加上animation動畫, 可以達到一些不錯的效果: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);自定義的animation可以查看具體的XML, 比如從左邊進來的一個動畫: 當然最后不要忘記在你的Activity中override onTouch方法來獲取手勢action:Override public boolean onTouchE

16、vent(MotionEvent event) if (gestureDetector.onTouchEvent(event) return true; else return false; Android滑動手勢的相關(guān)識別方法就為大家介紹到這里。android滑動分頁 實現(xiàn)原理通過手指的滑動,判斷數(shù)據(jù)大小然后動態(tài)改變數(shù)據(jù)底部的加載是一個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(加載中.); 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下部是按鈕控制：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( 加載中. ); 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