在我的 android 应用程序中显示 PDF 文件

Question

I cannot figure out how to show a PDF file inside an Android application. So far I've found out that it is possible to launch an Intent and open the PDF using the Android default app. But I want to view PDF file directly inside my application without exiting. I have an header and a footer in my layout - I'd like to open the PDF in between. I have also found a PdfReader.jar file from github.com, but it opens the PDF in a new activity.

Answer 1

You can download the source from here( Display PDF file inside my android application )

Add this dependency in your gradle file:

compile 'com.github.barteksc:android-pdf-viewer:2.0.3'

activity_main.xml

<RelativeLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff"
    xmlns:android="http://schemas.android.com/apk/res/android" >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="@color/colorPrimaryDark"
        android:text="View PDF"
        android:textColor="#ffffff"
        android:id="@+id/tv_header"
        android:textSize="18dp"
        android:gravity="center"></TextView>

    <com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfView"
        android:layout_below="@+id/tv_header"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>


    </RelativeLayout>

MainActivity.java

package pdfviewer.pdfviewer;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import com.github.barteksc.pdfviewer.PDFView;
import com.github.barteksc.pdfviewer.listener.OnLoadCompleteListener;
import com.github.barteksc.pdfviewer.listener.OnPageChangeListener;
import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle;
import com.shockwave.pdfium.PdfDocument;

import java.util.List;

public class MainActivity extends Activity implements OnPageChangeListener,OnLoadCompleteListener{
    private static final String TAG = MainActivity.class.getSimpleName();
    public static final String SAMPLE_FILE = "android_tutorial.pdf";
    PDFView pdfView;
    Integer pageNumber = 0;
    String pdfFileName;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        pdfView= (PDFView)findViewById(R.id.pdfView);
        displayFromAsset(SAMPLE_FILE);
    }

    private void displayFromAsset(String assetFileName) {
        pdfFileName = assetFileName;

        pdfView.fromAsset(SAMPLE_FILE)
                .defaultPage(pageNumber)
                .enableSwipe(true)

                .swipeHorizontal(false)
                .onPageChange(this)
                .enableAnnotationRendering(true)
                .onLoad(this)
                .scrollHandle(new DefaultScrollHandle(this))
                .load();
    }


    @Override
    public void onPageChanged(int page, int pageCount) {
        pageNumber = page;
        setTitle(String.format("%s %s / %s", pdfFileName, page + 1, pageCount));
    }


    @Override
    public void loadComplete(int nbPages) {
        PdfDocument.Meta meta = pdfView.getDocumentMeta();
        printBookmarksTree(pdfView.getTableOfContents(), "-");

    }

    public void printBookmarksTree(List<PdfDocument.Bookmark> tree, String sep) {
        for (PdfDocument.Bookmark b : tree) {

            Log.e(TAG, String.format("%s %s, p %d", sep, b.getTitle(), b.getPageIdx()));

            if (b.hasChildren()) {
                printBookmarksTree(b.getChildren(), sep + "-");
            }
        }
    }

}

Answer 2

Maybe you can integrate MuPdf in your application. Here is I've described how to do this: Integrate MuPDF Reader in an app

Answer 3

Highly recommend you check out PDF.js which is able to render PDF documents in a standard a WebView component.

Also see https://github.com/loosemoose/androidpdf for a sample implementation of this.

Answer 4

I do not think that you can do this easily. you should consider this answer here:

How can I display a pdf document into a Webview?

basically you'll be able to see a pdf if it is hosted online via google documents, but not if you have it in your device (you'll need a standalone reader for that)

Answer 5

Uri path = Uri.fromFile(file );
Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
pdfIntent.setDataAndType(path , "application/pdf");
pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
    startActivity(pdfIntent ); 
    }
catch (ActivityNotFoundException e) {
    Toast.makeText(EmptyBlindDocumentShow.this,
            "No Application available to viewPDF",
            Toast.LENGTH_SHORT).show();
    }  
}  

Answer 6

 public class MainActivity extends AppCompatActivity {
   WebView webview;
   ProgressBar progressbar;

  @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    webview = (WebView)findViewById(R.id.webview);
    progressbar = (ProgressBar) findViewById(R.id.progressbar);
    webview.getSettings().setJavaScriptEnabled(true);
    String filename ="http://www3.nd.edu/~cpoellab/teaching/cse40816/android_tutorial.pdf";
    webview.loadUrl("http://docs.google.com/gview?embedded=true&url=" + filename);

    webview.setWebViewClient(new WebViewClient() {

        public void onPageFinished(WebView view, String url) {
            // do your stuff here
            progressbar.setVisibility(View.GONE);
        }
    });

}

}

Answer 7

Found this solution using PdfRenderer .

https://medium.com/@chahat.jain0/rendering-a-pdf-document-in-android-activity-fragment-using-pdfrenderer-442462cb8f9a

Answer 8

This is the perfect solution that worked for me without any 3rd party library.

Rendering a PDF Document in Android Activity/Fragment (Using PdfRenderer)

Answer 9

I cannot figure out how to show a PDF file inside an Android application. So far I've found out that it is possible to launch an Intent and open the PDF using the Android default app. But I want to view PDF file directly inside my application without exiting. I have an header and a footer in my layout - I'd like to open the PDF in between. I have also found a PdfReader.jar file from github.com, but it opens the PDF in a new activity.