【发布时间】:2014-11-24 09:13:00
【问题描述】:
年龄不长,我可以使用下面的代码在我的 webview 中打开 pdf。
view.loadUrl("https://docs.google.com/gview?embedded=true&url=" + str);
但是突然不行了。
我不知道原因。
如何在我的网页视图中打开 pdf??
【问题讨论】:
年龄不长,我可以使用下面的代码在我的 webview 中打开 pdf。
view.loadUrl("https://docs.google.com/gview?embedded=true&url=" + str);
但是突然不行了。
我不知道原因。
如何在我的网页视图中打开 pdf??
【问题讨论】:
创建一个下载器类
public class Downloader {
public static void DownloadFile(String fileURL, File directory) {
try {
FileOutputStream f = new FileOutputStream(directory);
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
在你的活动中setContentView(R.layout.main);write 这些行
String extStorageDirectory = Environment.getExternalStorageDirectory()
.toString();
File folder = new File(extStorageDirectory, "pdf");
folder.mkdir();
File file = new File(folder, "Read.pdf");
try {
file.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
Downloader.DownloadFile("URL", file);
showPdf();
写这个方法
public void showPdf()
{
File file = new File(Environment.getExternalStorageDirectory()+"/Mypdf/Read.pdf");
PackageManager packageManager = getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
List list = packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
startActivity(intent);
}
在您的AndroidManifest.xml 中添加这些权限
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
【讨论】:
我认为这个问题是重复的,我得到了解决方案
1) 类型:
webView.loadUrl("https://docs.google.com/gview?url="+pdfUrl.get(position).url);
2) 别忘了设置 webview 客户端
webView.setWebViewClient(new WebViewClient() {
ProgressDialog progressDialog;
//If you will not use this method url links are opeen in new brower not in webview
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if (progressDialog == null) {
// in standard case YourActivity.this
progressDialog = new ProgressDialog(getActivity());
progressDialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
}
public void onPageFinished(WebView view, String url) {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
}
});
【讨论】: