android Gesture 简单Demo 源码

今天想学习一下anddroid Gesture.在网上找了些资料，自己写了个小Demo.

 

实现了手动拖动图片

 

用户可以从左往右、从右往左、从上到下、从下到上拖动图片。

 

图片进入时添加了简单的Animation动画.

 

有需要的同学可以下载下来看看。

 

 擦擦，发现不能上传rar文件

那只能贴出来了。。

Java类：

 

package com.covics.zfh;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.GestureDetector;import android.view.GestureDetector.OnGestureListener;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;public class HelloGestureActivity extends Activity implements OnTouchListener, OnGestureListener{private static final String TAG = "GestureActivity------->";private GestureDetector mGestureDetector = new GestureDetector(this);private TextView tv;private ImageView ivImage;private int[] imageId = {R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2, R.drawable.sample_3, R.drawable.sample_4, R.drawable.sample_5, R.drawable.sample_6, R.drawable.sample_7};private int mCurrentIndex = 0;private Animation leftInAnimation;private Animation upInAnimation;private Animation rightInAnimation;private Animation downInAnimation;private Context mContext;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        mContext = getApplicationContext();        init();                ivImage.setOnTouchListener(this);        ivImage.setFocusable(true);        ivImage.setClickable(true);        ivImage.setLongClickable(true);        ivImage.setImageResource(imageId[mCurrentIndex]);        mGestureDetector.setIsLongpressEnabled(true);    }        private void init(){        ivImage = (ImageView) findViewById(R.id.image);        leftInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.left_in);        upInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.up_in);        rightInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.right_in);        downInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.down_in);    }    // 在onTouch()方法中我们调用GestureDetector的onTouchEvent方法，将捕捉到 的    // MotionEvent交给GestureDetector 来分析是否有合适的callBack函数来处理手势@Overridepublic boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stubreturn mGestureDetector.onTouchEvent(event);}    // 用户轻点触摸屏，由1个MotionEvent ACTION_DOWN触发@Overridepublic boolean onDown(MotionEvent e) {return false;}// 用户轻触触摸屏后松开，由1个MotionEvent ACTION_UP触发@Overridepublic boolean onSingleTapUp(MotionEvent e) {// TODO Auto-generated method stubreturn false;}// 用户轻点触摸屏，尚末松开或者拖动，由1个MotionEvent ACTION_DOWN触发// 注意和onDown()的区别，是没有松开或者拖动的状态@Overridepublic void onShowPress(MotionEvent e) {// TODO Auto-generated method stub}// 用户按下触摸屏并拖动 由1个MotionEvent EVENT_DOWN 多个EVENT_MOVE触发@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,float distanceY) {// TODO Auto-generated method stubreturn false;}// 用户长按触摸屏，由多个MotionEvent EVENT_DOWN触发@Overridepublic void onLongPress(MotionEvent e) {// TODO Auto-generated method stub}// 用户按下触摸屏，快速移动后松开，由1个MotionEvent ACTION_DOWN // 多个EVENT_MOVE 和1个EVENT_UP触发@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,float velocityY) {// TODO Auto-generated method stub// 参数解释：       // 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int FLING_MIN_DISTANCE = 100; int FLING_MIN_VELOCITY = 200;if ((e1.getX() - e2.getX()) > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {System.out.println(TAG + "onFling left");if (mCurrentIndex == imageId.length - 1) {Toast.makeText(mContext, "当前已经是最后一张了", Toast.LENGTH_LONG).show();} else {mCurrentIndex++;leftInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.left_in);ivImage.setAnimation(leftInAnimation);ivImage.setImageResource(imageId[mCurrentIndex]);}} else if ((e2.getX() - e1.getX()) > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {System.out.println(TAG + "onFling right");if (mCurrentIndex == 0) {Toast.makeText(mContext, "当前已经是第一张了", Toast.LENGTH_LONG).show();} else {mCurrentIndex--;rightInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.right_in);ivImage.setAnimation(rightInAnimation);ivImage.setImageResource(imageId[mCurrentIndex]);}} else if ((e1.getY() - e2.getY()) > FLING_MIN_DISTANCE && Math.abs(velocityY) > FLING_MIN_VELOCITY) {System.out.println(TAG + "onFling up");if (mCurrentIndex == imageId.length - 1) {Toast.makeText(mContext, "当前已经是最后一张了", Toast.LENGTH_LONG).show();} else {mCurrentIndex++;//ivImage.setAnimation(rightOutAnimation);//leftInAnimation.setDuration(1000);upInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.up_in);ivImage.setAnimation(upInAnimation);ivImage.setImageResource(imageId[mCurrentIndex]);}} else if ((e2.getY() - e1.getY()) > FLING_MIN_DISTANCE && Math.abs(velocityY) > FLING_MIN_VELOCITY) {System.out.println(TAG + "onFling down");if (mCurrentIndex == 0) {Toast.makeText(mContext, "当前已经是第一张了", Toast.LENGTH_LONG).show();} else {mCurrentIndex--;downInAnimation = AnimationUtils.loadAnimation(mContext, R.anim.down_in);ivImage.setAnimation(downInAnimation);ivImage.setImageResource(imageId[mCurrentIndex]);}}return false;}}

 

 

下面是动画效果XML实现
down_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >    <translate        android:fromYDelta="-100%p"        android:toYDelta="0"        android:duration="900"     /></set>

left_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >    <translate        android:fromXDelta="100%p"        android:toXDelta="0"        android:duration="800"     /></set>        

right_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >    <translate        android:fromXDelta="-100%p"        android:toXDelta="0"        android:duration="800"     /></set>        

up_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >    <translate        android:fromYDelta="100%p"        android:toYDelta="0"        android:duration="900"     /></set>        

 

布局文件：
main.xml:    
  

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/tv"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/hello" /><ImageView     android:id="@+id/image"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    /></LinearLayout>

记得添加图片哈。