手势检测实现相册的左右滑动（并加上移动与旋转的特效） 首先，activity_main.xml里，使用ViewFlipper组件（可使用动画控制多个组件之间的切换效果） <?xml version="

首先，activity_main.xml里，使用ViewFlipper组件（可使用动画控制多个组件之间的切换效果）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.zking.administrator.g160628_android20_gesture.MainActivity">




    <ViewFlipper
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/vf_main_image"
        ></ViewFlipper>




</LinearLayout>

在这里，我设置了移动与旋转的动画特效，在这里，你可以选择自己想要的动画特效，然后进行代码编写

left_in（左进）：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:duration="1000"
    >
     <translate
         android:fromXDelta="-100%p"
         android:toXDelta="0"
         ></translate>




    <rotate
        android:fromDegrees="0"
        android:toDegrees="360"
        android:pivotX="50%"
        android:pivotY="50%"
        ></rotate>




</set>

right_out（右出）：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:duration="1000"
    >
     <translate
         android:fromXDelta="0"
         android:toXDelta="100%p"
         ></translate>




    <rotate
        android:fromDegrees="0"
        android:toDegrees="360"
        android:pivotX="50%"
        android:pivotY="50%"
        ></rotate>




</set>

left_out（左出）：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:duration="1000"
    >
     <translate
         android:fromXDelta="0"
         android:toXDelta="-100%p"
         ></translate>




    <rotate
        android:fromDegrees="0"
        android:toDegrees="-360"
        android:pivotX="50%"
        android:pivotY="50%"
        ></rotate>




</set>

right_in（右进）：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:duration="1000"
    >
     <translate
         android:fromXDelta="100%p"
         android:toXDelta="0"
         ></translate>




    <rotate
        android:fromDegrees="0"
        android:toDegrees="-360"
        android:pivotX="50%"
        android:pivotY="50%"
        ></rotate>




</set>

最后，在activity_main.xml相对应的MainActivity中，开始实现图片的左右滑动及动画特效

package com.zking.administrator.g160628_android20_gesture;




import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.ViewFlipper;




public class MainActivity extends AppCompatActivity {




    private ViewFlipper vf_main_image;
    private int images[]={R.drawable.s1,R.drawable.s2,R.drawable.s3};
    private GestureDetector gd;




    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        vf_main_image = (ViewFlipper) findViewById(R.id.vf_main_image);
        for (int i = 0; i < images.length; i++) {
            ImageView iv=new ImageView(this);
            iv.setImageResource(images[i]);
            vf_main_image.addView(iv);
        }




        //实例化手势检测器类
        gd = new GestureDetector(this, new GestureDetector.OnGestureListener() {
            //按下
            @Override
            public boolean onDown(MotionEvent e) {
                Log.i("test","onDown");
                return false;
            }
                  //按下，但是还未抬起
            @Override
            public void onShowPress(MotionEvent e) {
                Log.i("test","onShowPress");




            }
             //轻按，按一下，立刻抬起
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                Log.i("test","onSingleTapUp");
                return false;
            }
            //滚动
            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                Log.i("test","onScroll");
                return false;
            }
            //长按
            @Override
            public void onLongPress(MotionEvent e) {
                Log.i("test","onLongPress");




            }
             //拖动
            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                Log.i("test","onFling");
                if(e2.getX()-e1.getX()>200){
                    Toast.makeText(MainActivity.this, "右滑,上一张", Toast.LENGTH_SHORT).show();
                    vf_main_image.showPrevious();
                    //左进右出
                    vf_main_image.setInAnimation(MainActivity.this,R.anim.left_in);
                    vf_main_image.setOutAnimation(MainActivity.this,R.anim.right_out);
                }
                if(e1.getX()-e2.getX()>200){
                    Toast.makeText(MainActivity.this, "左滑,下一张", Toast.LENGTH_SHORT).show();
                    vf_main_image.showNext();
                    //左出右进
                    vf_main_image.setInAnimation(MainActivity.this,R.anim.right_in);
                    vf_main_image.setOutAnimation(MainActivity.this,R.anim.left_out);
                }
                return false;
            }
        });
    }




    @Override
    public boolean onTouchEvent(MotionEvent event) {
//        Log.i("test","onTouchEvent");
        return gd.onTouchEvent(event);
    }
}