android:使用内置的pdf查看器从我的应用程序打开pdf

另外,Adobe还没有记录任何公开的 Intents 它希望开发者使用。

你可以试一试 ACTION_VIEW Intent Uri 指向文件(在SD卡上或 MODE_WORLD_READABLE 在您的应用程序(本地文件存储)和MIME类型的 "application/pdf"

您可以通过编程方式确定用户设备上是否存在合适的应用程序,而不会捕获异常。

Intent intent = new Intent(Intent.ACTION_VIEW,
        Uri.parse("path-to-document"));
intent.setType("application/pdf");
PackageManager pm = getPackageManager();
List<ResolveInfo> activities = pm.queryIntentActivities(intent, 0);
if (activities.size() > 0) {
    startActivity(intent);
} else {
    // Do something else here. Maybe pop up a Dialog or Toast
}

private void loadDocInReader(String doc)
     throws ActivityNotFoundException, Exception {

    try {
                Intent intent = new Intent();

                intent.setPackage("com.adobe.reader");
                intent.setDataAndType(Uri.parse(doc), "application/pdf");

                startActivity(intent);

    } catch (ActivityNotFoundException activityNotFoundException) {
                activityNotFoundException.printStackTrace();

                throw activityNotFoundException;
    } catch (Exception otherException) {
                otherException.printStackTrace();

                throw otherException;
    }
}

            FileFinalpath = SdCardpath + "/" + Filepath + Filename;
            File file = new File(FileFinalpath);
            if (file.exists()) {
                Uri filepath = Uri.fromFile(file);
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setDataAndType(filepath, "application/pdf");
                intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

                try {
                    startActivity(intent);
                } catch (Exception e) {
                    alert.showAlertDialog(PDF_Activity.this, "File Not Started...","File Not Started From SdCard ", false);             
                    Log.e("error", "" + e);
                }

            } else {
                alert.showAlertDialog(PDF_Activity.this, "File Not Found...","File Not Found From SdCard ", false);             

            }

虽然这是一个非常古老的主题,但这里有一个使用外部PDF阅读器应用程序打开资产/文件夹中的PDF的解决方案。它使用自定义内容提供程序: https://github.com/commonsguy/cwac-provider

当我尝试在android设备上显示PDF时,也遇到了同样的问题,最终得到了解决方案(第三方PDF库集成)

https://github.com/JoanZapata/android-pdfview

虽然我已经测试了下面列出的多个库,这些库也在工作,

https://github.com/jblough/Android-Pdf-Viewer-Library

&带有ndk味道的mupdf( https://code.google.com/p/mupdf/downloads/detail?name=mupdf-1.2-source.zip&can=2&q= http://dixitpatel.com/integrating-pdf-in-android-application/

Android有一个来自android5.0/Lollipop的内置框架,叫做 PDFRenderer . 如果你可以假设你的用户有android5.0,那么它可能是最好的解决方案。

谷歌开发者网站上有一个官方的例子:

http://developer.android.com/samples/PdfRendererBasic/index.html

mupdf .

除了标记为answer的权限之外,您还需要manifest.xml中的这些权限

**

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

**

Intent intent = new Intent(Intent.ACTION_VIEW)
Uri outputFileUri = FileProvider.getUriForFile(getActivity(), BuildConfig.APPLICATION_ID + ".provider", file); 
intent.setDataAndType(outputFileUri, "application/pdf"); 
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); 
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
Intent in = Intent.createChooser(intent, "Open File");
startActivity(in);

同时在res->处添加provider\u paths.xml;xml文件夹

<application>
   <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true"
            tools:replace="android:authorities">
            <meta-data
                tools:replace="android:resource"
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths" />
        </provider>
 </application>