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。
