左右切换图片控件大家都用ViewPager, ViewFipper比较多吧,我之前也用ViewPager实现了,使用ViewPager实现左右循环滑动图片,有兴趣的可以去看下,今天介绍的是基于ImageSwitcher实现的左右切换图片,先上截图吧
好了,接下来来看代码吧,第一张图是一个GridView,点击item跳转到第二个界面,第一个界面可以忽略,主要是讲解ImageSwitcher的左右却换图片,先看布局文件
- <?xml version="1.0" encoding="UTF-8"?>
- <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent" >
- <ImageSwitcher
- android:id="@+id/imageSwitcher1"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- </ImageSwitcher>
- <RelativeLayout
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:orientation="vertical" >
- <LinearLayout
- android:id="@+id/viewGroup"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:layout_marginBottom="30dp"
- android:gravity="center_horizontal"
- android:orientation="horizontal" >
- </LinearLayout>
- </RelativeLayout>
- </FrameLayout>
- package com.example.photoalbum;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.MotionEvent;
- import android.view.View;
- import android.view.View.OnTouchListener;
- import android.view.ViewGroup;
- import android.view.animation.AnimationUtils;
- import android.widget.ImageSwitcher;
- import android.widget.ImageView;
- import android.widget.LinearLayout;
- import android.widget.RelativeLayout.LayoutParams;
- import android.widget.Toast;
- import android.widget.ViewSwitcher.ViewFactory;
- public class ShowPhotoActivity extends Activity implements ViewFactory, OnTouchListener{
- /**
- * ImagaSwitcher 的引用
- */
- private ImageSwitcher mImageSwitcher;
- /**
- * 图片id数组
- */
- private int[] imgIds;
- /**
- * 当前选中的图片id序号
- */
- private int currentPosition;
- /**
- * 按下点的X坐标
- */
- private float downX;
- /**
- * 装载点点的容器
- */
- private LinearLayout linearLayout;
- /**
- * 点点数组
- */
- private ImageView[] tips;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.show_photo);
- imgIds = new int[]{R.drawable.item01,R.drawable.item02,R.drawable.item03,R.drawable.item04,
- R.drawable.item05, R.drawable.item06, R.drawable.item07, R.drawable.item08,R.drawable.item09,
- R.drawable.item10, R.drawable.item11, R.drawable.item12};
- //实例化ImageSwitcher
- mImageSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher1);
- //设置Factory
- mImageSwitcher.setFactory(this);
- //设置OnTouchListener,我们通过Touch事件来切换图片
- mImageSwitcher.setOnTouchListener(this);
- linearLayout = (LinearLayout) findViewById(R.id.viewGroup);
- tips = new ImageView[imgIds.length];
- for(int i=0; i<imgIds.length; i++){
- ImageView mImageView = new ImageView(this);
- tips[i] = mImageView;
- LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT,
- LayoutParams.WRAP_CONTENT));
- layoutParams.rightMargin = 3;
- layoutParams.leftMargin = 3;
- mImageView.setBackgroundResource(R.drawable.page_indicator_unfocused);
- linearLayout.addView(mImageView, layoutParams);
- }
- //这个我是从上一个界面传过来的,上一个界面是一个GridView
- currentPosition = getIntent().getIntExtra("position", 0);
- mImageSwitcher.setImageResource(imgIds[currentPosition]);
- setImageBackground(currentPosition);
- }
- /**
- * 设置选中的tip的背景
- * @param selectItems
- */
- private void setImageBackground(int selectItems){
- for(int i=0; i<tips.length; i++){
- if(i == selectItems){
- tips[i].setBackgroundResource(R.drawable.page_indicator_focused);
- }else{
- tips[i].setBackgroundResource(R.drawable.page_indicator_unfocused);
- }
- }
- }
- @Override
- public View makeView() {
- final ImageView i = new ImageView(this);
- i.setBackgroundColor(0xff000000);
- i.setScaleType(ImageView.ScaleType.CENTER_CROP);
- i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
- return i ;
- }
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- switch (event.getAction()) {
- case MotionEvent.ACTION_DOWN:{
- //手指按下的X坐标
- downX = event.getX();
- break;
- }
- case MotionEvent.ACTION_UP:{
- float lastX = event.getX();
- //抬起的时候的X坐标大于按下的时候就显示上一张图片
- if(lastX > downX){
- if(currentPosition > 0){
- //设置动画,这里的动画比较简单,不明白的去网上看看相关内容
- mImageSwitcher.setInAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.left_in));
- mImageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.right_out));
- currentPosition --;
- mImageSwitcher.setImageResource(imgIds[currentPosition % imgIds.length]);
- setImageBackground(currentPosition);
- }else{
- Toast.makeText(getApplication(), "已经是第一张", Toast.LENGTH_SHORT).show();
- }
- }
- if(lastX < downX){
- if(currentPosition < imgIds.length - 1){
- mImageSwitcher.setInAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.right_in));
- mImageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.lift_out));
- currentPosition ++ ;
- mImageSwitcher.setImageResource(imgIds[currentPosition]);
- setImageBackground(currentPosition);
- }else{
- Toast.makeText(getApplication(), "到了最后一张", Toast.LENGTH_SHORT).show();
- }
- }
- }
- break;
- }
- return true;
- }
- }
左边进入的动画,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="500"/>
- </set>
- <?xml version="1.0" encoding="UTF-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android">
- <translate
- android:fromXDelta="0"
- android:toXDelta="-100%p"
- android:duration="500"/>
- </set>
- <?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="500"/>
- </set>
- <?xml version="1.0" encoding="UTF-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android">
- <translate
- android:fromXDelta="0"
- android:toXDelta="100%p"
- android:duration="500"/>
- </set>