First create PDFTools.java file in Src folder, and paste this code
public class PDFTools {
private static final String GOOGLE_DRIVE_PDF_READER_PREFIX = "http://drive.google.com/viewer?url=";
private static final String PDF_MIME_TYPE = "application/pdf";
private static final String HTML_MIME_TYPE = "text/html";
static Context mcontext;
/**
* If a PDF reader is installed, download the PDF file and open it in a
* reader. Otherwise ask the user if he/she wants to view it in the Google
* Drive online PDF reader.<br />
* <br />
* <b>BEWARE:</b> This method
*
* @param context
* @param pdfUrl
* @return
*/
public static void showPDFUrl(final Context context, final String pdfUrl) {
mcontext=context;
if (isPDFSupported(mcontext)) {
downloadAndOpenPDF(mcontext, pdfUrl);
} else {
askToOpenPDFThroughGoogleDrive(mcontext, pdfUrl);
}
}
/**
* Downloads a PDF with the Android DownloadManager and opens it with an
* installed PDF reader app.
*
* @param context
* @param pdfUrl
*/
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public static void downloadAndOpenPDF(final Context context, final String pdfUrl) {
// Get filename
final String filename = pdfUrl.substring(pdfUrl.lastIndexOf("/") + 1);
// The place where the downloaded PDF file will be put
final File tempFile = new File(context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), filename);
if (tempFile.exists()) {
// If we have downloaded the file before, just go ahead and show it.
openPDF(context, Uri.fromFile(tempFile));
return;
}
// Show progress dialog while downloading
final ProgressDialog progress = ProgressDialog.show(context, context.getString(R.string.pdf_show_local_progress_title),
context.getString(R.string.pdf_show_local_progress_content), true);
// Create the download request
DownloadManager.Request r = new DownloadManager.Request(Uri.parse(pdfUrl));
r.setDestinationInExternalFilesDir(context, Environment.DIRECTORY_DOWNLOADS, filename);
final DownloadManager dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
BroadcastReceiver onComplete = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (!progress.isShowing()) {
return;
}
context.unregisterReceiver(this);
progress.dismiss();
long downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
Cursor c = dm.query(new DownloadManager.Query().setFilterById(downloadId));
if (c.moveToFirst()) {
int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
if (status == DownloadManager.STATUS_SUCCESSFUL) {
openPDF(context, Uri.fromFile(tempFile));
}
}
c.close();
}
};
context.registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
// Enqueue the request
dm.enqueue(r);
}
/**
* Show a dialog asking the user if he wants to open the PDF through Google
* Drive
*
* @param context
* @param pdfUrl
*/
public static void askToOpenPDFThroughGoogleDrive(final Context context, final String pdfUrl) {
new AlertDialog.Builder(context).setTitle(R.string.pdf_show_online_dialog_title).setMessage(R.string.pdf_show_online_dialog_question)
.setNegativeButton(R.string.pdf_show_online_dialog_button_no, null).setPositiveButton(R.string.pdf_show_online_dialog_button_yes, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
openPDFThroughGoogleDrive(context, pdfUrl);
}
}).show();
}
/**
* Launches a browser to view the PDF through Google Drive
*
* @param context
* @param pdfUrl
*/
public static void openPDFThroughGoogleDrive(final Context context, final String pdfUrl) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(Uri.parse(GOOGLE_DRIVE_PDF_READER_PREFIX + pdfUrl), HTML_MIME_TYPE);
context.startActivity(i);
}
/**
* Open a local PDF file with an installed reader
*
* @param context
* @param localUri
*/
public static final void openPDF(Context context, Uri localUri) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(localUri, PDF_MIME_TYPE);
context.startActivity(i);
}
/**
* Checks if any apps are installed that supports reading of PDF files.
*
* @param context
* @return
*/
public static boolean isPDFSupported(Context context) {
Intent i = new Intent(Intent.ACTION_VIEW);
final File tempFile = new File(context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), "test.pdf");
i.setDataAndType(Uri.fromFile(tempFile), PDF_MIME_TYPE);
return context.getPackageManager().queryIntentActivities(i, PackageManager.MATCH_DEFAULT_ONLY).size() > 0;
}
}
Now, wherever you want to open pdf file onclick of button or images, make like this
btnPDF.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String pdfUrl = "pdfurl";
if (PDFTools.isPDFSupported(context)) {
PDFTools.showPDFUrl(context, pdfUrl);
} else {
Toast.makeText(context, "Please Download PDF Reader",Toast.LENGTH_SHORT).show();
}
}
});
Finally, your pdf will be open.
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