استفسار عن دالة لقراءة pdf من نفس التطبيق

اولاً تفضل المكتبة تقدر تحملها من هذا الرابط

بعد ذلك قم بعمل imported للمكتبة وقم بكتابة الكود التالي في ملف Layout

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="

"

android:layout_width="match_parent"
android:layout_height="match_parent">

<WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

اما بالسبة للـ java الذي بتعرض المرتبط بالواجها

import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.graphics.Bitmap; import android.os.AsyncTask; import android.os.Bundle; import android.os.Environment; import android.util.Base64; import android.util.Log; import android.view.View; import android.view.ViewTreeObserver; import android.webkit.WebView; import com.sun.pdfview.PDFFile; import com.sun.pdfview.PDFImage; import com.sun.pdfview.PDFPage; import com.sun.pdfview.PDFPaint; import net.sf.andpdf.nio.ByteBuffer; import net.sf.andpdf.refs.HardReference; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.RandomAccessFile; import java.nio.channels.FileChannel;

//Globals: private WebView wv; private int ViewSize = 0;

//OnCreate Method: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //Settings PDFImage.sShowImages = true; // show images PDFPaint.s_doAntiAlias = true; // make text smooth HardReference.sKeepCaches = true; // save images in cache

//Setup webview
wv = (WebView)findViewById(R.id.webView1);
wv.getSettings().setBuiltInZoomControls(true);//show zoom buttons
wv.getSettings().setSupportZoom(true);//allow zoom
//get the width of the webview
wv.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener()
{
    @Override
    public void onGlobalLayout()
    {
        ViewSize = wv.getWidth();
        wv.getViewTreeObserver().removeGlobalOnLayoutListener(this);
    }
});

try
{
    File file = new File(Environment.getExternalStorageDirectory().getPath() + "/randompdf.pdf");
    RandomAccessFile f = new RandomAccessFile(file, "r");
    byte[] data = new byte[(int)f.length()];
    f.readFully(data);
    pdfLoadImages(data);
}
catch(Exception ignored)
{
}

}

//Load Images: private void pdfLoadImages(final byte[] data) { try { // run async new AsyncTask() { // create and show a progress dialog ProgressDialog progressDialog = ProgressDialog.show(MainActivity.this, "", "Opening...");

        @Override
        protected void onPostExecute(String html)
        {
            //after async close progress dialog
            progressDialog.dismiss();
            //load the html in the webview
            wv.loadDataWithBaseURL("", html, "text/html","UTF-8", "");
        }

        @Override
        protected String doInBackground(Void... params)
        {
            try
            {
                //create pdf document object from bytes
                ByteBuffer bb = ByteBuffer.NEW(data);
                PDFFile pdf = new PDFFile(bb);
                //Get the first page from the pdf doc
                PDFPage PDFpage = pdf.getPage(1, true);
                //create a scaling value according to the WebView Width
                final float scale = ViewSize / PDFpage.getWidth() * 0.95f;
                //convert the page into a bitmap with a scaling value
                Bitmap page = PDFpage.getImage((int)(PDFpage.getWidth() * scale), (int)(PDFpage.getHeight() * scale), null, true, true);
                //save the bitmap to a byte array
                ByteArrayOutputStream stream = new ByteArrayOutputStream();
                page.compress(Bitmap.CompressFormat.PNG, 100, stream);
                byte[] byteArray = stream.toByteArray();
                stream.reset();
                //convert the byte array to a base64 string
                String base64 = Base64.encodeToString(byteArray, Base64.NO_WRAP);
                //create the html + add the first image to the html
                String html = "<!DOCTYPE html><html><body bgcolor=\"#b4b4b4\"><img src=\"data:image/png;base64,"+base64+"\" hspace=10 vspace=10><br>";
                //loop though the rest of the pages and repeat the above
                for(int i = 2; i <= pdf.getNumPages(); i++)
                {
                    PDFpage = pdf.getPage(i, true);
                    page = PDFpage.getImage((int)(PDFpage.getWidth() * scale), (int)(PDFpage.getHeight() * scale), null, true, true);
                    page.compress(Bitmap.CompressFormat.PNG, 100, stream);
                    byteArray = stream.toByteArray();
                    stream.reset();
                    base64 = Base64.encodeToString(byteArray, Base64.NO_WRAP);
                    html += "<img src=\"data:image/png;base64,"+base64+"\" hspace=10 vspace=10><br>";
                }
                stream.close();
                html += "</body></html>";
                return html;
            }
            catch (Exception e)
            {
                Log.d("error", e.toString());
            }
            return null;
        }
    }.execute();
    System.gc();// run GC
}
catch (Exception e)
{
    Log.d("error", e.toString());
}

}

واي شئ ما فهمتة انا متواجد :)