Android—手势

思维导图：

实例：给一个不可以滑动控件设置手势，让它可以进行滑动（加上旋转动画）。

动画部分：新建一个anim的文件夹和layout平级（内含四个动画）

left_in.xml

<?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>

left_out.xml

<?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.xml

<?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.xml

<?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>

主XML文件

activity_main.xml

<?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>

主Java文件

MainActivity.java

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};   //图片资源，可以换上你自己的资源    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);    }}