Android-手势-实现图片左右滑动效果

实现代码：

<?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.chenjun.jun_0710_gesture.MainActivity"> <ViewFlipper android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/vf_main_image" ></ViewFlipper> </LinearLayout>

package com.chenjun.jun_0710_gesture; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.GestureDetector; import android.view.MotionEvent; import android.widget.ImageView; 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); } gd = new GestureDetector(this, new GestureDetector.OnGestureListener() { @Override public boolean onDown(MotionEvent e) { return false; } @Override public void onShowPress(MotionEvent e) { } @Override public boolean onSingleTapUp(MotionEvent e) { return false; } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { return false; } @Override public void onLongPress(MotionEvent e) { } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (e2.getX()-e1.getX()>200){ vf_main_image.showPrevious(); } if (e1.getX()-e2.getX()>200){ vf_main_image.showNext(); } return false; } }); } @Override public boolean onTouchEvent(MotionEvent event) { return gd.onTouchEvent(event); } }