参考：https://blog.csdn.net/Android_Cll/article/details/131641229
https://cloud.tencent.com/developer/article/2301730
Android项目新增js：/app/src/main/assets/wwwroot/index.js 我新建了一个wwwroot放里面了。自己看着办。
var url = location.search.substring(1); PDFJS.cMapUrl = 'https://unpkg.com/[email protected]/cmaps/'; PDFJS.cMapPacked = true; var pdfDoc = null; function createPage() { var div = document.createElement("canvas"); document.body.appendChild(div); return div; } function renderPage(num) { pdfDoc.getPage(num).then(function (page) { var viewport = page.getViewport(2.0); var canvas = createPage(); var ctx = canvas.getContext('2d'); canvas.height = viewport.height; canvas.width = viewport.width; page.render({ canvasContext: ctx, viewport: viewport }); }); } PDFJS.getDocument(url).then(function (pdf) { pdfDoc = pdf; for (var i = 1; i <= pdfDoc.numPages; i++) { renderPage(i) } });
同样目录，再新增一个index.html
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=4.0,user-scalable=no"/>
<title>Document</title>
<style type="text/css">
canvas {
width: 100%;
height: 100%;
border: 1px solid black;
}
</style>
<script src="https://unpkg.com/[email protected]/build/pdf.min.js"></script>
<script type="text/javascript" src="index.js"></script>
</head>
<body>
</body>
</html>
webview加载pdf
package com.jay.myappstudy;
import android.app.Activity;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
public class WebViewPdfActivity extends Activity {
private WebView mWv1;
private Context ctx = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web_view_pdf);
mWv1 = findViewById(R.id.wv1);
WebSettings webSettings = mWv1.getSettings();
// 允许javascript 设置支持JS就自动打开IndexedDB存储机制
webSettings.setJavaScriptEnabled(true);
webSettings.setUseWideViewPort(true); //将图片调整到适合WebView的大小
webSettings.setLoadWithOverviewMode(true);
webSettings.setLoadWithOverviewMode(true); // 缩放至屏幕的大小
webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NORMAL);
webSettings.setUserAgentString("User-Agent");
//webSettings.setLightTouchEnabled(true);//设置用鼠标激活被选项
webSettings.setBuiltInZoomControls(true);//设置支持缩放
webSettings.setDomStorageEnabled(true);//设置DOM缓存，当H5网页使用localStorage时，一定要设置
webSettings.setDatabaseEnabled(true);
//WebSettings.LOAD_NO_CACHE 设置去缓存，防止加载的为上一次加载过的
webSettings.setCacheMode(WebSettings.LOAD_DEFAULT);
webSettings.setSupportZoom(true);//设置支持变焦
mWv1.setHapticFeedbackEnabled(false);
//webSettings.setPluginState(WebSettings.PluginState.ON);
webSettings.setAllowFileAccess(true);
webSettings.setAllowContentAccess(true);
// 设置是否允许通过 file url 加载的 Javascript 可以访问其他的源(包括http、https等源)
webSettings.setAllowUniversalAccessFromFileURLs(true);
// 支持通过JS打开新窗口
webSettings.setAllowFileAccessFromFileURLs(true);
webSettings.setDefaultTextEncodingName("UTF-8");
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setGeolocationEnabled(true);
webSettings.setAppCacheEnabled(false);
mWv1.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
//触摸焦点起作用
mWv1.requestFocus();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
//http与https的方法
webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
}
mWv1.loadUrl("file:///android_asset/wwwroot/viewpdf.html?http://192.168.9.9:8090/1.pdf");
}
}
标签：WebSettings,mWv1,WebView,var,PDF,Android,true,webSettings,android From： https://www.cnblogs.com/xsj1989/p/17800056.html