前言

项目中有需求在APP的Webview中长按图片可以保存。后来就去研究一下该怎么实现，顺便整理了一下。

WebView基本配置

mWvContent.getSettings().setJavaScriptEnabled(true);mWvContent.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);mWvContent.getSettings().setDomStorageEnabled(false);mWvContent.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);// 自适应屏幕mWvContent.getSettings().setUseWideViewPort(true);mWvContent.getSettings().setLoadWithOverviewMode(true);

注册ContextMenu

registerForContextMenu(mWvContent);

重写下面的方法即可保存图片

@Override public void onCreateContextMenu(ContextMenu contextMenu, View view, ContextMenu.ContextMenuInfo contextMenuInfo) { super.onCreateContextMenu(contextMenu, view, contextMenuInfo); final WebView.HitTestResult webViewHitTestResult = mWvContent.getHitTestResult(); if (webViewHitTestResult.getType() == WebView.HitTestResult.IMAGE_TYPE || webViewHitTestResult.getType() == WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE) { contextMenu.setHeaderTitle("网页中下载图片"); contextMenu.add(0, 1, 0, "点击保存") .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { String DownloadImageURL = webViewHitTestResult.getExtra(); if (URLUtil.isValidUrl(DownloadImageURL)) { DownloadManager.Request request = new DownloadManager.Request(Uri.parse(DownloadImageURL)); request.allowScanningByMediaScanner(); //设置图片的保存路径 request.setDestinationInExternalFilesDir(WebViewActivity.this, "/img", "/a.png"); DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); downloadManager.enqueue(request); Toast.makeText(WebViewActivity.this, "下载成功", Toast.LENGTH_LONG).show(); } else { Toast.makeText(WebViewActivity.this, "下载失败", Toast.LENGTH_LONG).show(); } return false; } }); } }

需要添加相关权限

<uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

这样就可以实现在Webview中长按图片点击下载功能了。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。