[Android]网页内图片点击查看大图/识别二维码/下载

场景

项目中的广告详情页面是个webView加载的富文本，包含图片，需要点击查看大图，长按识别二维码功能。

实现

webView基础设置

        val webView = fragment.binding.webViewwebView.settings.javaScriptEnabled = truewebView.settings.builtInZoomControls = falsewebView.settings.displayZoomControls = truewebView.settings.setSupportZoom(false)//不支持缩放功能webView.scrollBarStyle = View.SCROLLBARS_INSIDE_OVERLAY //取消滚动条白边效果webView.webChromeClient = WebChromeClient()webView.webViewClient = MyWebViewClient()webView.addJavascriptInterface(MJavascriptInterface(fragment.activity,fragment),"imagelistener")webView.settings.defaultTextEncodingName = "UTF-8"webView.settings.blockNetworkImage = falseif (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {webView.settings.mixedContentMode = WebSettings.MIXED_CONTENT_ALWAYS_ALLOW  //注意安卓5.0以上的权限}if (detail.content.checkNotNull()) {val css = "<style>*{padding: 0;margin: 0}#webview_content_wrapper{margin: 10px 15px 0 15px;}; p{color: #333333;line-height: 2em;font-size:14px;opacity: 1;}; img {margin-top: 13px;margin-bottom: 15px;width: 100%;}</style>"val html = css + "<body><div id='webview_content_wrapper'>" + detail.content + "</div></body>"webView.loadDataWithBaseURL(null, ImageUtil.getNewContent(html), "text/html", "UTF-8", null)}webView.setOnLongClickListener(object : View.OnLongClickListener {override fun onLongClick(v: View?): Boolean {val result =webView.hitTestResultif (!result.checkNotNull()) {return false}val type = result.typewhen (type) {// 超链接WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE,/*带有链接的图片类型*/WebView.HitTestResult.IMAGE_TYPE -> {// 处理长按图片的菜单项val coverUrl = result.extraif (URLUtil.isValidUrl(coverUrl) || coverUrl.startsWith("data:image")) {UiUtils.webViewLongClick(fragment, webView.context, coverUrl)return true}}}return false}})

webViewLongClick

/*网页长按弹窗（识别二维码，下载图片）*/@JvmStaticfun webViewLongClick(fragment: BaseFragment, context: Context, coverUrl: String) {openSelect(fragment, context, coverUrl)}/*网页长按弹窗（识别二维码，下载图片）*/private fun openSelect(fragment: BaseFragment, context: Context, coverUrl: String) {val dialog = BottomSheetDialog(context)val layoutView = LayoutInflater.from(context).inflate(R.layout.dialog_select_qrcode_down_img, null)layoutView.findViewById<TextView>(R.id.tv_qrcode).setOnClickListener {//图片urlGlide.with(context.applicationContext).asBitmap().load(coverUrl).into(object : SimpleTarget<Bitmap>() {override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) {CodeUtils.analyzeBitmap(resource, object : CodeUtils.AnalyzeCallback {override fun onAnalyzeSuccess(mBitmap: Bitmap, result: String) {fragment.start(WebFragment.newInstance("", result))}override fun onAnalyzeFailed() {"未识别到二维码".toast()}})dialog.dismiss()}})}layoutView.findViewById<TextView>(R.id.tv_download).setOnClickListener {if (coverUrl.startsWith("data:image")) {var fileName: String? = nullif (MimeTypeMap.getFileExtensionFromUrl(coverUrl) == "") {fileName = System.currentTimeMillis().toString() + ".jpg"} else {fileName = System.currentTimeMillis().toString() + "." + MimeTypeMap.getFileExtensionFromUrl(coverUrl)}val file = BitmapUtils.saveBitmapFile(AndroidtoJs.stringToBitmap(coverUrl), DownLoadImageRunnable.SAVE_DOWNLOAD_IMAGE_PATH + fileName)if (file.checkNotNull()) {"已保存".toast()} else {"保存失败".toast()}} else {ImageUtil.downLoadImg(context, coverUrl)}dialog.dismiss()}dialog.setContentView(layoutView)dialog.show()}

弹窗布局dialog_select_qrcode_down_img.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="@color/white"android:orientation="vertical"><TextViewandroid:id="@+id/tv_qrcode"android:layout_width="match_parent"android:layout_height="wrap_content"android:includeFontPadding="false"android:padding="15dp"android:text="识别二维码"android:textColor="@color/color_333333"android:textSize="@dimen/sp_14" /><Viewandroid:layout_width="match_parent"android:layout_height="@dimen/dp_1"android:layout_marginLeft="@dimen/dp_15"android:layout_marginRight="@dimen/dp_15"android:background="@color/color_f5f5f5" /><TextViewandroid:id="@+id/tv_download"android:layout_width="match_parent"android:layout_height="wrap_content"android:includeFontPadding="false"android:padding="15dp"android:textColor="@color/color_333333"android:textSize="@dimen/sp_14"android:text="下载图片" />
</LinearLayout>

MyWebViewClient


import android.graphics.Bitmap;
import android.webkit.WebView;
import android.webkit.WebViewClient;/*** Created by Administrator on 2017/2/10.*/public class MyWebViewClient extends WebViewClient {@Overridepublic void onPageFinished(WebView view, String url) {view.getSettings().setJavaScriptEnabled(true);super.onPageFinished(view, url);addImageClickListener(view);//待网页加载完全后设置图片点击的监听方法}@Overridepublic void onPageStarted(WebView view, String url, Bitmap favicon) {view.getSettings().setJavaScriptEnabled(true);super.onPageStarted(view, url, favicon);}private void addImageClickListener(WebView webView) {webView.loadUrl("javascript:(function(){" + "var objs = document.getElementsByTagName(\"img\");" +" " + " var array=new Array(); " +" for(var j=0;j<objs.length;j++){ " + "array[j]=objs[j].src;" + " }  " +"for(var i=0;i<objs.length;i++)  " + "{" + "  objs[i].onclick=function()  " + "  {  " + "   " +" window.imagelistener.openImage(this.src,array);  " + "  }  " + "}" + "})()");}
}

MJavascriptInterface


import android.app.Activity;
import android.widget.ImageView;import com.xlj.app.global.base.BaseFragment;
import com.xlj.app.widget.ninegrid.ImageInfo;import java.util.ArrayList;public class MJavascriptInterface {private Activity context;private BaseFragment fragment;private static final String TAG = "SIMON";ArrayList<String> images = new ArrayList<>();public MJavascriptInterface(Activity context, BaseFragment fragment) {this.context = context;this.fragment = fragment;}@android.webkit.JavascriptInterface //必须添加public void openImage(String img, String[] array) {int index = 0;ArrayList<ImageInfo> imageInfo = new ArrayList<>();for (int i = 0; i < array.length; i++) {ImageInfo imInfo = new ImageInfo();imInfo.thumbnailUrl = array[i];imInfo.bigImageUrl = array[i];imageInfo.add(imInfo);if (array[i].equals(img)) {index = printArray(array, img);}}ImageView imageView = new ImageView(context);fragment.previewPhoto(imageView, imageInfo, index, false, true,true);}//遍历数组private int printArray(String[] array, String value) {for (int i = 0; i < array.length; i++) {if (array[i].equals(value)) {return i;}}return -1;//当if条件不成立时，默认返回一个负数值-1}
}

大图查看

//图片预览fun previewPhoto(clickImageView: ImageView, imageInfo: List<ImageInfo>, index: Int, finishAnimator: Boolean = true, isShowShare: Boolean = false,isSeeCode:Boolean=false) {if (imageInfo.isNotEmpty()) {val info: ImageInfo = imageInfo[0]imageInfo.forEach {it.imageViewWidth = clickImageView.widthit.imageViewHeight = clickImageView.heightval points = IntArray(2)clickImageView.getLocationInWindow(points)info.imageViewX = points[0]info.imageViewY = points[1] - StatusBarUtil.getStatusBarHeight(activity)}val intent = Intent(context, ImagePreviewActivity::class.java)val bundle = Bundle()bundle.putSerializable(ImagePreviewActivity.IMAGE_INFO, imageInfo as Serializable)bundle.putInt(ImagePreviewActivity.CURRENT_ITEM, index)bundle.putBoolean(ImagePreviewActivity.FINISH_ANIMATION, finishAnimator)bundle.putBoolean(ImagePreviewActivity.IS_SHOW_SHARE, isShowShare)bundle.putBoolean(ImagePreviewActivity.IS_SEE_CODE, isSeeCode)intent.putExtras(bundle)context!!.startActivity(intent)activity!!.overridePendingTransition(0, 0)}}

下面是图片预览的activity -----ImagePreviewActivity


import android.animation.Animator;
import android.animation.ValueAnimator;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.view.ViewPager;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewTreeObserver;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;import com.bigkoo.alertview.AlertView;
import com.bigkoo.alertview.OnItemClickListener;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.target.SimpleTarget;
import com.bumptech.glide.request.transition.Transition;
import com.dtr.zxing.utils.CodeUtils;
import com.kaopiz.kprogresshud.KProgressHUD;
import com.tencent.qcloud.tim.uikit.component.photoview.downloadimg.ImageUtil;
import com.tencent.qcloud.tim.uikit.utils.ToastUtil;
import com.umeng.analytics.MobclickAgent;
import com.umeng.socialize.UMShareAPI;
import com.xlj.app.R;
import com.xlj.app.global.Constant;
import com.xlj.app.mvvm.main.activity.WebActivity;
import com.xlj.app.mvvm.main.fragment.WebFragment;
import com.xlj.app.utils.EventBusUtils;
import com.xlj.app.utils.Toast.ToastUtils;
import com.xlj.app.widget.ninegrid.ImageInfo;import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.List;public class ImagePreviewActivity extends Activity implements ViewTreeObserver.OnPreDrawListener {public static final String IMAGE_INFO = "IMAGE_INFO";public static final String CURRENT_ITEM = "CURRENT_ITEM";public static final String FINISH_ANIMATION = "FINISH_ANIMATION";public static final String IS_SHOW_SHARE = "IS_SHOW_SHARE";//是否有 识别二维码public static final String IS_SEE_CODE = "IS_SEE_CODE";public static final int ANIMATE_DURATION = 200;private RelativeLayout rootView;private ImagePreviewAdapter imagePreviewAdapter;private List<ImageInfo> imageInfo;private int currentItem;private int imageHeight;private int imageWidth;private int screenWidth;private int screenHeight;private boolean isUseFinishAnimator, isShowShare, isSeeCode;private KProgressHUD loading;private String bigImageUrl;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_preview);loading = KProgressHUD.create(ImagePreviewActivity.this).setStyle(KProgressHUD.Style.SPIN_INDETERMINATE).setWindowColor(ImagePreviewActivity.this.getResources().getColor(R.color.color_trans)).setCancellable(false);ViewPager viewPager = findViewById(R.id.viewPager);final TextView tv_pager = findViewById(R.id.tv_pager);ImageView imgShare = findViewById(R.id.img_share);rootView = findViewById(R.id.rootView);DisplayMetrics metric = new DisplayMetrics();getWindowManager().getDefaultDisplay().getMetrics(metric);screenWidth = metric.widthPixels;screenHeight = metric.heightPixels;Intent intent = getIntent();imageInfo = (List<ImageInfo>) intent.getSerializableExtra(IMAGE_INFO);currentItem = intent.getIntExtra(CURRENT_ITEM, 0);isUseFinishAnimator = intent.getBooleanExtra(FINISH_ANIMATION, true);isShowShare = intent.getBooleanExtra(IS_SHOW_SHARE, false);//是否有弹窗菜单（转发。保存）isSeeCode = intent.getBooleanExtra(IS_SEE_CODE, false);//是否有弹窗菜单（转发。保存）imgShare.setVisibility(isShowShare ? View.VISIBLE : View.GONE);imagePreviewAdapter = new ImagePreviewAdapter(this, imageInfo);imagePreviewAdapter.setIsShowOrginal(isShowShare);imagePreviewAdapter.setSeeCode(isSeeCode);viewPager.setAdapter(imagePreviewAdapter);viewPager.setCurrentItem(currentItem);viewPager.getViewTreeObserver().addOnPreDrawListener(this);viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {@Overridepublic void onPageSelected(int position) {currentItem = position;tv_pager.setText(String.format(getString(R.string.select), currentItem + 1, imageInfo.size()));}});tv_pager.setText(String.format(getString(R.string.select), currentItem + 1, imageInfo.size()));bigImageUrl = imageInfo.get(currentItem).thumbnailUrl;imgShare.setOnClickListener(v -> {if (bigImageUrl != null && !"".equals(bigImageUrl)) {menuPop(v, bigImageUrl);}
//            DialogUtils.umShare(ImagePreviewActivity.this,imgShare.getContext(),bigImageUrl,"分享到", loading);
/*            new Thread(() -> ImageUtil.url2Bitmap(ImagePreviewActivity.this, bigImageUrl, new ImageUtil.GetCallBackInterface<Bitmap>() {@Overridepublic void onSuccess(Bitmap bitmap) {//点击分享if (bitmap != null) {runOnUiThread(() -> DialogUtils.shareWeChatDialog(ImagePreviewActivity.this, bitmap, "分享到").show());}}@Overridepublic void onFail(String s) {}})).start();*/});}private void menuPop(View v, String bigImageUrl) {if (isSeeCode) {showSeeCodeDialog(v);return;}new AlertView("操作", null, "取消", null, new String[]{"转发", "保存"}, v.getContext(), AlertView.Style.ActionSheet, new OnItemClickListener() {@Overridepublic void onItemClick(Object o, int position) {if (position == -1) return;if (position == 0) {//转发if (currentItem == -1) return;EventBusUtils.forwordImgMessage(currentItem);onBackPressed();} else {if (bigImageUrl.contains("http")) {ImageUtil.downLoadImg(ImagePreviewActivity.this, bigImageUrl);} else {try {FileInputStream fis = new FileInputStream(bigImageUrl);Bitmap bitmap = BitmapFactory.decodeStream(fis);boolean succ = ImageUtil.saveImageToGallery(ImagePreviewActivity.this, bitmap);String tip = "";if (succ) {tip = "已保存到相册";} else {tip = "保存失败";}ToastUtil.toastShortMessage(tip);} catch (FileNotFoundException e) {e.printStackTrace();}}}}}).setCancelable(true).show();}private void showSeeCodeDialog(View v) {new AlertView("操作", null, "取消", null, new String[]{"识别二维码", "保存"}, v.getContext(), AlertView.Style.ActionSheet, new OnItemClickListener() {@Overridepublic void onItemClick(Object o, int position) {if (position == -1) return;if (position == 0) {// 识别二维码Glide.with(v.getContext()).asBitmap().load(bigImageUrl).into(new SimpleTarget<Bitmap>() {@Overridepublic void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {CodeUtils.analyzeBitmap(resource, new CodeUtils.AnalyzeCallback() {@Overridepublic void onAnalyzeSuccess(Bitmap mBitmap, String result) {WebActivity.Companion.start(v.getContext(),result,"");}@Overridepublic void onAnalyzeFailed() {ToastUtils.showShortToast(v.getContext(), "未识别到二维码");}});}});} else {if (bigImageUrl.contains("http")) {ImageUtil.downLoadImg(ImagePreviewActivity.this, bigImageUrl);} else {try {FileInputStream fis = new FileInputStream(bigImageUrl);Bitmap bitmap = BitmapFactory.decodeStream(fis);boolean succ = ImageUtil.saveImageToGallery(ImagePreviewActivity.this, bitmap);String tip = "";if (succ) {tip = "已保存到相册";} else {tip = "保存失败";}ToastUtil.toastShortMessage(tip);} catch (FileNotFoundException e) {e.printStackTrace();}}}}}).setCancelable(true).show();}@Overridepublic void onBackPressed() {finishActivityAnim();}/*** 绘制前开始动画*/@Overridepublic boolean onPreDraw() {rootView.getViewTreeObserver().removeOnPreDrawListener(this);final View view = imagePreviewAdapter.getPrimaryItem();final ImageView imageView = imagePreviewAdapter.getPrimaryImageView();computeImageWidthAndHeight(imageView);final ImageInfo imageData = imageInfo.get(currentItem);final float vx = imageData.imageViewWidth * 1.0f / imageWidth;final float vy = imageData.imageViewHeight * 1.0f / imageHeight;ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 1.0f);valueAnimator.addUpdateListener(animation -> {long duration = animation.getDuration();long playTime = animation.getCurrentPlayTime();float fraction = duration > 0 ? (float) playTime / duration : 1f;if (fraction > 1) {fraction = 1;}view.setTranslationX(evaluateInt(fraction, imageData.imageViewX + imageData.imageViewWidth / 2 - imageView.getWidth() / 2, 0));view.setTranslationY(evaluateInt(fraction, imageData.imageViewY + imageData.imageViewHeight / 2 - imageView.getHeight() / 2, 0));view.setScaleX(evaluateFloat(fraction, vx, 1));view.setScaleY(evaluateFloat(fraction, vy, 1));view.setAlpha(fraction);rootView.setBackgroundColor(evaluateArgb(fraction, Color.TRANSPARENT, Color.BLACK));});addIntoListener(valueAnimator);valueAnimator.setDuration(ANIMATE_DURATION);valueAnimator.start();return true;}@Overrideprotected void onResume() {super.onResume();MobclickAgent.onPageStart(this.getClass().getSimpleName());MobclickAgent.onResume(this);if (loading.isShowing()) {loading.dismiss();}}@Overrideprotected void onPause() {super.onPause();MobclickAgent.onPageEnd(this.getClass().getSimpleName());MobclickAgent.onPause(this);}public void longClick(View v) {if (!isShowShare) return;//if (bigImageUrl != null && !"".equals(bigImageUrl)) {menuPop(v, bigImageUrl);}}/*** activity的退场动画*/public void finishActivityAnim() {if (!isUseFinishAnimator) {finish();overridePendingTransition(0, 0);} else {final View view = imagePreviewAdapter.getPrimaryItem();final ImageView imageView = imagePreviewAdapter.getPrimaryImageView();computeImageWidthAndHeight(imageView);final ImageInfo imageData = imageInfo.get(currentItem);final float vx = imageData.imageViewWidth * 1.0f / imageWidth;final float vy = imageData.imageViewHeight * 1.0f / imageHeight;final ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 1.0f);valueAnimator.addUpdateListener(animation -> {long duration = animation.getDuration();long playTime = animation.getCurrentPlayTime();float fraction = duration > 0 ? (float) playTime / duration : 1f;if (fraction > 1) {fraction = 1;}view.setTranslationX(evaluateInt(fraction, 0, imageData.imageViewX + imageData.imageViewWidth / 2 - imageView.getWidth() / 2));view.setTranslationY(evaluateInt(fraction, 0, imageData.imageViewY + imageData.imageViewHeight / 2 - imageView.getHeight() / 2));view.setScaleX(evaluateFloat(fraction, 1, vx));view.setScaleY(evaluateFloat(fraction, 1, vy));view.setAlpha(1 - fraction);rootView.setBackgroundColor(evaluateArgb(fraction, Color.BLACK, Color.TRANSPARENT));});addOutListener(valueAnimator);valueAnimator.setDuration(ANIMATE_DURATION);valueAnimator.start();}}/*** 计算图片的宽高*/private void computeImageWidthAndHeight(ImageView imageView) {// 获取真实大小Drawable drawable = imageView.getDrawable();int intrinsicHeight = drawable.getIntrinsicHeight();int intrinsicWidth = drawable.getIntrinsicWidth();// 计算出与屏幕的比例，用于比较以宽的比例为准还是高的比例为准，因为很多时候不是高度没充满，就是宽度没充满float h = screenHeight * 1.0f / intrinsicHeight;float w = screenWidth * 1.0f / intrinsicWidth;if (h > w) h = w;else w = h;// 得出当宽高至少有一个充满的时候图片对应的宽高imageHeight = (int) (intrinsicHeight * h);imageWidth = (int) (intrinsicWidth * w);}/*** 进场动画过程监听*/private void addIntoListener(ValueAnimator valueAnimator) {valueAnimator.addListener(new Animator.AnimatorListener() {@Overridepublic void onAnimationStart(Animator animation) {rootView.setBackgroundColor(0x0);}@Overridepublic void onAnimationEnd(Animator animation) {}@Overridepublic void onAnimationCancel(Animator animation) {}@Overridepublic void onAnimationRepeat(Animator animation) {}});}/*** 退场动画过程监听*/private void addOutListener(ValueAnimator valueAnimator) {valueAnimator.addListener(new Animator.AnimatorListener() {@Overridepublic void onAnimationStart(Animator animation) {rootView.setBackgroundColor(0x0);}@Overridepublic void onAnimationEnd(Animator animation) {finish();overridePendingTransition(0, 0);}@Overridepublic void onAnimationCancel(Animator animation) {}@Overridepublic void onAnimationRepeat(Animator animation) {}});}/*** Integer 估值器*/public Integer evaluateInt(float fraction, Integer startValue, Integer endValue) {int startInt = startValue;return (int) (startInt + fraction * (endValue - startInt));}/*** Float 估值器*/public Float evaluateFloat(float fraction, Number startValue, Number endValue) {float startFloat = startValue.floatValue();return startFloat + fraction * (endValue.floatValue() - startFloat);}/*** Argb 估值器*/public int evaluateArgb(float fraction, int startValue, int endValue) {int startA = (startValue >> 24) & 0xff;int startR = (startValue >> 16) & 0xff;int startG = (startValue >> 8) & 0xff;int startB = startValue & 0xff;int endA = (endValue >> 24) & 0xff;int endR = (endValue >> 16) & 0xff;int endG = (endValue >> 8) & 0xff;int endB = endValue & 0xff;return (startA + (int) (fraction * (endA - startA))) << 24| (startR + (int) (fraction * (endR - startR))) << 16| (startG + (int) (fraction * (endG - startG))) << 8| (startB + (int) (fraction * (endB - startB)));}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);UMShareAPI.get(this).onActivityResult(requestCode, resultCode, data);}}

预览的xml文件activity_preview.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/rootView"android:layout_width="match_parent"android:layout_height="match_parent"><com.xlj.app.widget.ninegrid.preview.HackyViewPagerandroid:id="@+id/viewPager"android:layout_width="match_parent"android:layout_height="match_parent" /><TextViewandroid:id="@+id/tv_pager"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:layout_centerHorizontal="true"android:layout_marginBottom="20dp"android:text="1/4"android:textColor="#ffffff"android:textSize="20sp" /><ImageViewandroid:id="@+id/img_share"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_margin="10dp"android:padding="5dp"android:src="@drawable/ic_pic_more" />
</RelativeLayout>

用到了一个自定义的HackyViewPager


import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;/** 修复图片在ViewPager控件中缩放报错的BUG */
public class HackyViewPager extends ViewPager {public HackyViewPager(Context context) {super(context);}public HackyViewPager(Context context, AttributeSet attrs) {super(context, attrs);}@Overridepublic boolean onTouchEvent(MotionEvent ev) {try {return super.onTouchEvent(ev);} catch (IllegalArgumentException ex) {ex.printStackTrace();}return false;}@Overridepublic boolean onInterceptTouchEvent(MotionEvent ev) {try {return super.onInterceptTouchEvent(ev);} catch (IllegalArgumentException ex) {ex.printStackTrace();}return false;}
}

参考链接

Android 实现WebView点击图片查看大图列表及图片保存
webview 获取html中所有的图片资源并给图片添加点击事件
android 获取webview中所有的图片
Android-通过WebView获取html内容

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[Android]网页内图片点击查看大图/识别二维码/下载

场景

实现

参考链接

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