Android ViewFlipper 手势触摸案例

最新推荐文章于 2021-05-29 01:48:41 发布

richway2010

最新推荐文章于 2021-05-29 01:48:41 发布

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分类专栏： Android应用与开发篇文章标签： android animation layout velocity distance encoding

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本文介绍了一种在Android应用中实现触摸屏左右滑动翻页效果的方法。通过使用ViewFlipper组件配合自定义动画及手势识别，实现了流畅的页面切换体验。文中详细展示了XML布局配置、主配置文件及核心Java类的实现细节。

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广大博友，看过后帮忙顶顶，谢谢大家！！！

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直接进入主题，先来看看效果：

从右往左触摸屏幕：

实现：main.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android" > <ViewFlipper android:id="@+id/flipper" android:layout_height="fill_parent" android:layout_width="fill_parent"> <include android:id="@+id/firstlayout" layout="@layout/left"/> <include android:id="@+id/secondlayout" layout="@layout/center"/> <include android:id="@+id/thirdlayout" layout="@layout/right"/> </ViewFlipper> </LinearLayout>

center.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:gravity="center_vertical" android:layout_height="fill_parent" android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <ImageView android:layout_height="wrap_content" android:layout_width="wrap_content" android:src="@drawable/a3"> </ImageView></LinearLayout>

left.xml

right.xml

主配置文件：AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.flipper" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".ViewFlipperDemoActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>

主类：ViewFlipperDemoActivity.java

import android.app.Activity; import android.os.Bundle; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View; import android.view.GestureDetector.OnGestureListener; import android.view.View.OnTouchListener; import android.view.animation.AccelerateInterpolator; import android.view.animation.Animation; import android.view.animation.TranslateAnimation; import android.widget.ViewFlipper; public class ViewFlipperDemoActivity extends Activity implements OnGestureListener,OnTouchListener{ private ViewFlipper mFlipper; GestureDetector mGestureDetector; private int mCurrentLayoutState; private static final int FLING_MIN_DISTANCE = 120; private static final int FLING_MIN_VELOCITY = 240; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mFlipper = (ViewFlipper) findViewById(R.id.flipper); //注册一个用于手势识别的类 mGestureDetector = new GestureDetector(this); //给mFlipper设置一个listener mFlipper.setOnTouchListener(this); mCurrentLayoutState = 0; //允许长按住ViewFlipper,这样才能识别拖动等手势 mFlipper.setLongClickable(true); /** * 定义从右侧进入的动画效果 * @return */ protected Animation inFromRightAnimation() { Animation inFromRight = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, +1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); inFromRight.setDuration(500); inFromRight.setInterpolator(new AccelerateInterpolator()); return inFromRight; } /** * 定义从左侧退出的动画效果 * @return */ protected Animation outToLeftAnimation() { Animation outtoLeft = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); outtoLeft.setDuration(500); outtoLeft.setInterpolator(new AccelerateInterpolator()); return outtoLeft; } /** * 定义从左侧进入的动画效果 * @return */ protected Animation inFromLeftAnimation() { Animation inFromLeft = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); inFromLeft.setDuration(500); inFromLeft.setInterpolator(new AccelerateInterpolator()); return inFromLeft; } /** * 定义从右侧退出时的动画效果 * @return */ protected Animation outToRightAnimation() { Animation outtoRight = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, +1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f); outtoRight.setDuration(500); outtoRight.setInterpolator(new AccelerateInterpolator()); return outtoRight; } public boolean onDown(MotionEvent e) { // TODO Auto-generated method stub return false; } /* * 用户按下触摸屏、快速移动后松开即触发这个事件 * e1：第1个ACTION_DOWN MotionEvent * e2：最后一个ACTION_MOVE MotionEvent * velocityX：X轴上的移动速度，像素/秒 * velocityY：Y轴上的移动速度，像素/秒 * 触发条件： * X轴的坐标位移大于FLING_MIN_DISTANCE，且移动速度大于FLING_MIN_VELOCITY个像素/秒 */ public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) { // 当像左侧滑动的时候 //设置View进入屏幕时候使用的动画 mFlipper.setInAnimation(inFromRightAnimation()); //设置View退出屏幕时候使用的动画 mFlipper.setOutAnimation(outToLeftAnimation()); mFlipper.showNext(); } else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) { // 当像右侧滑动的时候 mFlipper.setInAnimation(inFromLeftAnimation()); mFlipper.setOutAnimation(outToRightAnimation()); mFlipper.showPrevious(); } return false; } public boolean onTouch(View v, MotionEvent event) { // 将触屏事件交给手势识别类去处理 return mGestureDetector.onTouchEvent(event); } }

希望对你有帮助，谢谢