Assalamualikum Wr. Wb, Selamat Sore kali ini admin akan membahas library AndroidPdfViewer yang berguna untuk membuat aplikasi pembaca PDF. Library ini sangat lengkap bisa membuka file PDF lewat asset, lewat Uri untuk dokumentasi lengkap bisa dilihat di github

compile 'com.github.barteksc:android-pdf-viewer:2.7.0'

package com.giviews.pdfviewer;



import android.content.ActivityNotFoundException;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.database.Cursor;

import android.graphics.Color;

import android.net.Uri;

import android.os.Bundle;

import android.provider.OpenableColumns;

import android.support.annotation.NonNull;

import android.support.v4.app.ActivityCompat;

import android.support.v4.content.ContextCompat;

import android.support.v7.app.AppCompatActivity;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;



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 AppCompatActivity implements OnPageChangeListener, OnLoadCompleteListener {

    private static final String TAG = MainActivity.class.getSimpleName();



    private final static int REQUEST_CODE = 42;

    public static final int PERMISSION_CODE = 42042;



    public static final String SAMPLE_FILE = "sample.pdf";

    public static final String READ_EXTERNAL_STORAGE = "android.permission.READ_EXTERNAL_STORAGE";



    private PDFView pdfView;

    private Button openPdf;

    private Uri uri;

    private Integer pageNumber = 0;

    private String pdfFileName;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        pdfView = (PDFView) findViewById(R.id.pdfView);

        openPdf = (Button) findViewById(R.id.openpdf);



        openPdf.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Intent fileIntent = new Intent();

                fileIntent.setType("application/pdf")

                .setAction(Intent.ACTION_GET_CONTENT);



                int permissionCheck = ContextCompat.checkSelfPermission(MainActivity.this, READ_EXTERNAL_STORAGE);



                if (permissionCheck != PackageManager.PERMISSION_GRANTED) {

                    ActivityCompat.requestPermissions(

                            MainActivity.this,

                            new String[]{READ_EXTERNAL_STORAGE},

                            PERMISSION_CODE

                    );



                    return;

                }



                startActivityForResult(Intent.createChooser(fileIntent, "SELECT PDF"), REQUEST_CODE);

            }

        });



    }



    void afterViews() {

        pdfView.setBackgroundColor(Color.LTGRAY);

        if (uri != null) {

            displayFromUri(uri);

        } else {

            displayFromAsset(SAMPLE_FILE);

        }

        setTitle(pdfFileName);

    }



    private void displayFromAsset(String assetFileName) {

        pdfFileName = assetFileName;



        pdfView.fromAsset(SAMPLE_FILE)

                .defaultPage(pageNumber)

                .onPageChange(this)

                .enableAnnotationRendering(true)

                .onLoad(this)

                .scrollHandle(new DefaultScrollHandle(this))

                .spacing(10) // in dp

                .load();

    }



    private void displayFromUri(Uri uri) {

        pdfFileName = getFileName(uri);



        pdfView.fromUri(uri)

                .defaultPage(pageNumber)

                .onPageChange(this)

                .enableAnnotationRendering(true)

                .onLoad(this)

                .scrollHandle(new DefaultScrollHandle(this))

                .spacing(10) // in dp

                .load();

    }



    private String getFileName(Uri uri) {

        String result = null;

        if (uri.getScheme().equals("content")) {

            Cursor cursor = getContentResolver().query(uri, null, null, null, null);

            try {

                if (cursor != null && cursor.moveToFirst()) {

                    result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));

                }

            } finally {

                if (cursor != null) {

                    cursor.close();

                }

            }

        }

        if (result == null) {

            result = uri.getLastPathSegment();

        }

        return result;

    }





    @Override

    public void loadComplete(int nbPages) {

        PdfDocument.Meta meta = pdfView.getDocumentMeta();

        Log.e(TAG, "title = " + meta.getTitle());

        Log.e(TAG, "author = " + meta.getAuthor());

        Log.e(TAG, "subject = " + meta.getSubject());

        Log.e(TAG, "keywords = " + meta.getKeywords());

        Log.e(TAG, "creator = " + meta.getCreator());

        Log.e(TAG, "producer = " + meta.getProducer());

        Log.e(TAG, "creationDate = " + meta.getCreationDate());

        Log.e(TAG, "modDate = " + meta.getModDate());



        printBookmarksTree(pdfView.getTableOfContents(), "-");

    }



    private 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 + "-");

            }

        }

    }



    @Override

    public void onPageChanged(int page, int pageCount) {

        pageNumber = page;

        setTitle(String.format("%s %s / %s", pdfFileName, page + 1, pageCount));

    }



    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {

            uri = data.getData();

            displayFromUri(uri);

        }

    }

}

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

<html>
<head>
    <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>

  <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
 <title></title>
 <script type="text/javascript" src="https://api.bistri.com/bistri.conference.min.js"></script>

 <script type="text/javascript">
  /*
    JS library reference:
    http://developers.bistri.com/webrtc-sdk/js-library-reference
*/

var room;
var members;
var localStream;

// when Bistri API client is ready, function
// "onBistriConferenceReady" is invoked
onBistriConferenceReady = function () {

    // test if the browser is WebRTC compatible
    if ( !bc.isCompatible() ) {
        // if the browser is not compatible, display an alert
        alert( "your browser is not WebRTC compatible !" );
        // then stop the script execution
        return;
    }

    // initialize API client with application keys
    // if you don't have your own, you can get them at:
    // https://api.developers.bistri.com/login
    bc.init( {
        "appId": "Maukan AppId disini",
        "appKey": "Masukan App Key disini"
    } );
   
    /* Set events handler */

    // when local user is connected to the server
    bc.signaling.bind( "onConnected", function () {
        // show pane with id "pane_1"
        showPanel( "pane_1" );
    } );

    // when an error occured on the server side
    bc.signaling.bind( "onError", function ( error ) {
        // display an alert message
        alert( error.text + " (" + error.code + ")" );
    } );

    // when the user has joined a room
    bc.signaling.bind( "onJoinedRoom", function ( data ) {
        // set the current room name
        room = data.room;
        members = data.members;
        // ask the user to access to his webcam
        bc.startStream( "webcam-sd", function( stream ){
            // affect stream to "localStream" var
            localStream = stream;
            // when webcam access has been granted
            // show pane with id "pane_2"
            showPanel( "pane_2" );
            // insert the local webcam stream into div#video_container node
            bc.attachStream( stream, q( "#video_container" ), { mirror: true } );
            // then, for every single members present in the room ...
            for ( var i=0, max=members.length; i<max; i++ ) {
                // ... request a call
                bc.call( members[ i ].id, room, { "stream": stream } );
            }
        } );
    } );

    // when an error occurred while trying to join a room
    bc.signaling.bind( "onJoinRoomError", function ( error ) {
        // display an alert message
       alert( error.text + " (" + error.code + ")" );
    } );
   
    // when the local user has quitted the room
    bc.signaling.bind( "onQuittedRoom", function( room ) {
        // stop the local stream
        bc.stopStream( localStream, function(){
            // remove the stream from the page
            bc.detachStream( localStream );
            // show pane with id "pane_1"
            showPanel( "pane_1" );
        } );
    } );
   
    // when a new remote stream is received
    bc.streams.bind( "onStreamAdded", function ( remoteStream ) {
        // insert the new remote stream into div#video_container node
        bc.attachStream( remoteStream, q( "#video_container_2" ) );
    } );
   
    // when a remote stream has been stopped
    bc.streams.bind( "onStreamClosed", function ( stream ) {
        // remove the stream from the page
        bc.detachStream( stream );
    } );
   
    // when a local stream cannot be retrieved
    bc.streams.bind( "onStreamError", function( error ){ 
        switch( error.name ){
            case "PermissionDeniedError":
                alert( "Webcam access has not been allowed" );
                bc.quitRoom( room );
                break
            case "DevicesNotFoundError":
                if( confirm( "No webcam/mic found on this machine. Process call anyway ?" ) ){
                    // show pane with id "pane_2"
                    showPanel( "pane_2" );
                    for ( var i=0, max=members.length; i<max; i++ ) {
                        // ... request a call
                        bc.call( members[ i ].id, room );
                    }
                }
                else{
                    bc.quitRoom( room ); 
                }
                break
        }
    } );

    // bind function "joinConference" to button "Join Conference Room"
    q( "#join" ).addEventListener( "click", joinConference );
   
    // bind function "quitConference" to button "Quit Conference Room"
    q( "#quit" ).addEventListener( "click", quitConference );
   
    // open a new session on the server
    bc.connect();
}

// when button "Join Conference Room" has been clicked
function joinConference(){
    var roomToJoin = "vineet";
    // if "Conference Name" field is not empty ...
    if( roomToJoin ){
        // ... join the room
        bc.joinRoom( roomToJoin );
    }
    else{
        // otherwise, display an alert
        alert( "you must enter a room name !" )
    } 
}

// when button "Quit Conference Room" has been clicked
function quitConference(){
    // quit the current conference room
    bc.quitRoom( room );
}

function showPanel( id ){
    var panes = document.querySelectorAll( ".pane" );
    // for all nodes matching the query ".pane"
    for( var i=0, max=panes.length; i<max; i++ ){
        // hide all nodes except the one to show
        panes[ i ].style.display = panes[ i ].id == id ? "block" : "none";
    };
}

function q( query ){
    // return the DOM node matching the query
    return document.querySelector( query );
}
 </script>
 <style type="text/css">
   #video_container{
      
                margin: 20px;
                text-align: center;
                width:100px;
                height:50px;
                position:absolute;
                top:150px;
                left: 150px;
                z-index: 1;
   }
            #video_container_2{
               
                margin: 20px;
                text-align: center;
                width:800px;
                height:800px;
                position:absolute;
                top:250px;
                left: 200px;
            }
           
   video {
       width: 100%;
   }
            body{
            background-color:#E6E6FA;
            }         
            .container-fluid{
            background-image: linear-gradient(90deg, #4b6cb7, #182848);
            }


 </style>
</head>
<body>
    <div class="container-fluid" style="height:100px ">
            <div>
                <h1 class="col-sm-12 col-lg-9" style="top:25%"><strong><em>Video Call</strong></em></h1>
            </div>
            <div class="col-sm-12 col-lg-3" style="position:relative; top:25%; right:5%;"></div>
     </div>
    <div class="pane" id="pane_1" style="display: block">

        <br>
        <div class="container"><input type="button" value="Make Video Call" id="join" class="btn btn-lg btn-success"></div>
       
    </div>
   
    <div class=" pane" id="pane_2" style="display: none">
        <div id="video_container"></div>
        <div id="video_container_2"></div>
        <input type="button" value="Quit Conference Room" id="quit" class="btn btn-danger btn-default btn-block">
    </div>
</body>
</html>