小编给大家分享一下photoView如何实现图片多点触控效果，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
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具体内容如下
效果:点击后能够自由缩放、平移；
添加依赖:
compile 'com.commit451:PhotoView:1.2.4'
compile 'com.github.bumptech.glide:glide:3.5.2'
布局文件:
代码实现:
package com.example.tuhuadmin.imagetouch;
import android.content.Intent;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import com.bumptech.glide.Glide;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ViewPager vp;
private LinearLayout ll_point;
private ArrayList mImages;
//用于存放ImageView
private ArrayList imageViewsList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
initImageUrl();
getImageData();
}
private void initImageUrl() {
//要显示的图片地址添加到集合里面
mImages = new ArrayList();
mImages.add(Constant.url1);
mImages.add(Constant.url2);
mImages.add(Constant.url4);
mImages.add(Constant.url5);
mImages.add(Constant.url6);
imageViewsList = new ArrayList<>();
}
private void initViews() {
vp = (ViewPager) findViewById(R.id.viewPager);
ll_point = (LinearLayout) findViewById(R.id.ll_point);
//让图片正方形显示
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, ScreenUtils.getScreenWidth(this));
vp.setLayoutParams(params);
}
public void getImageData() {
if (mImages.size() == 1) {
// 只有一张图片 就不显示圆点
} else {
for (int i = 0; i < mImages.size(); i++) {
View point = new View(this);
//point.setId(i);//设置Id
point.setTag(i);//设置Tag
//设置背景
point.setBackgroundResource(R.drawable.point_selector);
//布局参数
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(15, 15);
params.rightMargin = 20;//右边距
//把点添加到线性布局
ll_point.addView(point, params);
}
View point = ll_point.getChildAt(0);
point.setEnabled(false);
}
for (int i = 0; i < mImages.size(); i++) {
ImageView iv = new ImageView(this);
//设置iv的宽高
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ScreenUtils.getScreenWidth(this));
iv.setLayoutParams(params);
//设置iv的填充样式--->可能导致图片变形
iv.setScaleType(ImageView.ScaleType.FIT_XY);
String url = mImages.get(i);
Glide.with(this).load(url).into(iv);
//设置图片的点击事件
//为每一个ImageView设置单独的标记、图片的位置
iv.setTag(i);
iv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int position = (int) view.getTag();
Intent intent = new Intent(MainActivity.this, PhotoShowActivity.class);
//传递当前点击的图片的位置、图片路径集合
intent.putExtra("position", position);
intent.putStringArrayListExtra("mImages", mImages);
startActivity(intent);
}
});
// 把图片添加到集合里面
imageViewsList.add(iv);
}
vp.setAdapter(new ViewPagerAdapter(imageViewsList,vp) );
vp.setOnPageChangeListener(new MyOnPageChangeListener());
}
private class MyOnPageChangeListener implements ViewPager.OnPageChangeListener {
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
//页面选择
@Override
public void onPageSelected(int index) {
changePager(index);
}
}
private void changePager(int index) {
int childCount = ll_point.getChildCount();
for (int i = 0; i < childCount; i++) {
View point = ll_point.getChildAt(i);//获取小圆点
if (index == i) {
//当前选择的页面下标
point.setEnabled(false);
} else {
point.setEnabled(true);
}
}
}
}PhotoShowActivity中代码实现:
package com.example.tuhuadmin.imagetouch;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.text.TextUtils;
import android.view.View;
import android.view.ViewGroup;
import com.bumptech.glide.Glide;
import java.util.ArrayList;
import uk.co.senab.photoview.PhotoView;
import uk.co.senab.photoview.PhotoViewAttacher;
/**
* Created on 2016/7/19.
* Author:crs
* Description:XXX
*/
public class PhotoShowActivity extends Activity {
private int position;
private ArrayList mDatas;
private HackyViewPager hViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photo_show);
getFrontPageData();
initViews();
}
private void initViews() {
hViewPager = (HackyViewPager) findViewById(R.id.hViewPager);
hViewPager.setAdapter(new ImageAdapter());
//为ViewPager当前page的数字
hViewPager.setCurrentItem(position);
}
public void getFrontPageData() {
//点击图片的位置
position = getIntent().getIntExtra("position", 0);
//获取传递过来的图片地址
mDatas = getIntent().getStringArrayListExtra("mImages");
}
public class ImageAdapter extends PagerAdapter {
@Override
public int getCount() {
return null == mDatas ? 0 : mDatas.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
//创建显示图片的控件
PhotoView photoView = new PhotoView(container.getContext());
//设置背景颜色
photoView.setBackgroundColor(Color.WHITE);
//把photoView添加到viewpager中，并设置布局参数
container.addView(photoView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
//加载当前PhtotoView要显示的数据
String url = mDatas.get(position);
if (!TextUtils.isEmpty(url)) {
//使用使用Glide进行加载图片进行加载图片
Glide.with(PhotoShowActivity.this).load(url).into(photoView);
}
//图片单击事件的处理
photoView.setOnViewTapListener(new PhotoViewAttacher.OnViewTapListener() {
@Override
public void onViewTap(View view, float x, float y) {
finish();
}
});
return photoView;
}
}
}ScreenUtils中代码：WindowManager类的使用 WINDOW_SERVICE Display(屏幕参数工具类)
package com.example.tuhuadmin.imagetouch;
import android.content.Context;
import android.view.Display;
import android.view.WindowManager;
/**
* Created on 2016/7/19.
* Author:crs
* Description:XXX
*/
public class ScreenUtils {
public static int getScreenWidth(Context context) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display defaultDisplay = wm.getDefaultDisplay();
int width = defaultDisplay.getWidth();
return width;
}
}Constant接口中存储字符串常量:
package com.example.tuhuadmin.imagetouch;
/**
* Created on 2016/7/19.
* Author:crs
* Description:XXX
*/
public interface Constant {
String url1 = "http://pic.yesky.com/uploadImages/2016/181/06/L3JL486FYCL7.jpg";
String url2 = "http://pic.yesky.com/uploadImages/2016/181/07/9MXS11F0HOC2.jpg";
String url5 = "http://xm.fjsen.com/images/attachement/jpg/site2/20160629/38c986e7161c18dd5a6c1d.jpg";
String url4 = "http://pimg.damai.cn/perform/project/281/28183_n.jpg";
String url6 = "http://i3.hunantv.com/p1/20110905/1702374043.jpg";
}ViewPagerAdapter：
package com.example.tuhuadmin.imagetouch;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.util.ArrayList;
/**
* Created on 2016/7/19.
* Author:crs
* Description:XXX
*/
public class ViewPagerAdapter extends PagerAdapter {
ArrayList mImages;
ViewPager vp;
public ViewPagerAdapter(ArrayList mImages, ViewPager vp) {
this.mImages = mImages;
this.vp = vp;
}
@Override
public int getCount() {
return null == mImages ? 0 : mImages.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
ImageView iv = mImages.get(position);
vp.removeView(iv);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView iv = mImages.get(position);
vp.addView(iv);
return mImages.get(position);
}
}以上是“photoView如何实现图片多点触控效果”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
新闻名称：photoView如何实现图片多点触控效果
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