Enable opening Pdf File from http and https Uri (5f8f8a6a) · Commits · e / os / PdfViewer

app/build.gradle

+1 −1

Original line number	Diff line number	Diff line
		@@ -35,7 +35,7 @@ android {
		compileSdkVersion 29
		defaultConfig {
		applicationId "com.gsnathan.pdfviewer"
		minSdkVersion 21
		minSdkVersion 26
		targetSdkVersion 29
		versionCode 22
		versionName "3.1"

app/src/main/AndroidManifest.xml

+2 −1

Original line number	Diff line number	Diff line
		@@ -3,7 +3,8 @@
		package="com.gsnathan.pdfviewer">

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

		<application
		android:name=".App"

app/src/main/java/com/gsnathan/pdfviewer/MainActivity.java

+104 −7

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@

		package com.gsnathan.pdfviewer;

		import android.Manifest;
		import android.content.ActivityNotFoundException;
		import android.content.DialogInterface;
		import android.content.Intent;
		@@ -32,6 +33,7 @@ import android.content.pm.PackageManager;
		import android.database.Cursor;
		import android.graphics.Color;
		import android.net.Uri;
		import android.os.Environment;
		import android.os.StrictMode;
		import android.preference.PreferenceManager;
		import android.print.PrintAttributes;
		@@ -73,6 +75,13 @@ import org.androidannotations.annotations.NonConfigurationInstance;
		import org.androidannotations.annotations.OnActivityResult;
		import org.androidannotations.annotations.ViewById;

		import java.io.File;
		import java.io.FileInputStream;
		import java.io.FileOutputStream;
		import java.io.IOException;
		import java.io.InputStream;
		import java.io.OutputStream;
		import java.util.Arrays;
		import java.util.List;

		@EActivity(R.layout.activity_main)
		@@ -84,6 +93,7 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen
		private PrintManager mgr = null;

		private final static int REQUEST_CODE = 42;
		public static final int PERMISSION_SAVE = 1;
		public static final int PERMISSION_CODE = 42042;

		public static final String SAMPLE_FILE = "pdf_sample.pdf";
		@@ -91,6 +101,8 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen
		private static String PDF_PASSWORD = "";
		private SharedPreferences prefManager;



		@Override
		protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		@@ -167,6 +179,8 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen

		String pdfFileName;

		String pdfTempFilePath;

		private void pickFile() {
		int permissionCheck = ContextCompat.checkSelfPermission(this,
		READ_EXTERNAL_STORAGE);
		@@ -277,6 +291,11 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen
		editor.putString("uri", uri.toString());
		editor.apply();

		if (uri.getScheme().contains("http")) {
		// we will get the pdf asynchronously with the RetrievePDFStream object
		RetrievePDFStream retrievePDFStream = new RetrievePDFStream(this);
		retrievePDFStream.execute(uri.toString(), pdfFileName);
		} else {
		pdfView.useBestQuality(prefManager.getBoolean("quality_pref", false));

		pdfView.fromUri(uri)
		@@ -295,9 +314,73 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen
		.pageSnap(prefManager.getBoolean("snap_pref", false))
		.pageFling(prefManager.getBoolean("fling_pref", false))
		.load();
		}
		}

		void displayFromFile(File file) {
		pdfView.useBestQuality(prefManager.getBoolean("quality_pref", false));

		pdfView.fromFile(file)
		.defaultPage(pageNumber)
		.onPageChange(this)
		.enableAnnotationRendering(true)
		.enableAntialiasing(prefManager.getBoolean("alias_pref", false))
		.onLoad(this)
		.scrollHandle(new DefaultScrollHandle(this))
		.spacing(10) // in dp
		.onPageError(this)
		.pageFitPolicy(FitPolicy.BOTH)
		.password(PDF_PASSWORD)
		.swipeHorizontal(prefManager.getBoolean("scroll_pref", false))
		.autoSpacing(prefManager.getBoolean("scroll_pref", false))
		.pageSnap(prefManager.getBoolean("snap_pref", false))
		.pageFling(prefManager.getBoolean("fling_pref", false))
		.load();

		}

		public void saveFileAndDisplay (File file) {
		String filePath = saveTempFileToFile(file);

		pdfView.useBestQuality(prefManager.getBoolean("quality_pref", false));

		File newFile = new File(filePath);

		displayFromFile(newFile);
		}

		String saveTempFileToFile(File tempFile) {
		try {
		// check if the permission to write to external storage is granted
		if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
		InputStream inputStream = new FileInputStream(tempFile);
		File newFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), pdfFileName);
		OutputStream outputStream = new FileOutputStream(newFile);
		Utils.readFromInputStreamToOutputStream(inputStream, outputStream);

		return tempFile.getPath();
		} else {
		// case if the permission hasn't been granted, we will store the pdf in a temp file
		//store the temporary file path, to be able to save it when permission will be granted
		pdfTempFilePath = tempFile.getPath();

		// request for the permission to write to external storage
		requestPermissions(
		new String[] {
		Manifest.permission.WRITE_EXTERNAL_STORAGE,
		Manifest.permission.READ_EXTERNAL_STORAGE
		},
		PERMISSION_SAVE
		);
		return pdfTempFilePath;
		}
		} catch (IOException e) {
		Log.e(TAG, "ERROR FILE " + e.getMessage() + e.getStackTrace());
		}

		return null;
		}

		void navToSettings() {
		startActivity(Utils.navIntent(this, SettingsActivity.class));
		}
		@@ -322,7 +405,10 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen
		Cursor cursor = getContentResolver().query(uri, null, null, null, null);
		try {
		if (cursor != null && cursor.moveToFirst()) {
		result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
		int indexDisplayName = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
		if(indexDisplayName != -1) {
		result = cursor.getString(indexDisplayName);
		}
		}
		} finally {
		if (cursor != null) {
		@@ -400,13 +486,24 @@ public class MainActivity extends ProgressActivity implements OnPageChangeListen
		@Override
		public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[],
		@NonNull int[] grantResults) {
		if (requestCode == PERMISSION_CODE) {
		if (grantResults.length > 0
		&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
		int indexPermission = 0;
		switch (requestCode) {
		case PERMISSION_CODE:
		indexPermission = Arrays.asList(permissions).indexOf(Manifest.permission.READ_EXTERNAL_STORAGE);
		if (indexPermission != -1 && grantResults[indexPermission] == PackageManager.PERMISSION_GRANTED) {
		launchPicker();
		}
		break;
		case PERMISSION_SAVE:
		indexPermission = Arrays.asList(permissions).indexOf(Manifest.permission.WRITE_EXTERNAL_STORAGE);
		if (indexPermission != -1 && grantResults[indexPermission] == PackageManager.PERMISSION_GRANTED) {
		File file = new File(pdfTempFilePath);
		saveTempFileToFile(file);
		}
		break;
		}
		}


		@Override
		public void onPageError(int page, Throwable t) {

app/src/main/java/com/gsnathan/pdfviewer/RetrievePDFStream.java

0 → 100644

+59 −0

Original line number	Diff line number	Diff line
		package com.gsnathan.pdfviewer;

		import android.os.AsyncTask;
		import android.util.Log;

		import java.io.BufferedInputStream;
		import java.io.File;
		import java.io.FileOutputStream;
		import java.io.IOException;
		import java.io.InputStream;
		import java.io.OutputStream;
		import java.lang.ref.WeakReference;
		import java.net.HttpURLConnection;
		import java.net.URL;

		/**
		* This class is used to get a Stream from an URL
		*/
		public class RetrievePDFStream extends AsyncTask<String, Void, File> {

		// a reference to our MainActivity, this is used to be able to call displayFromFile()
		private WeakReference<MainActivity> mainActivityWR;

		public RetrievePDFStream(MainActivity activity) {
		mainActivityWR = new WeakReference<>(activity);
		}

		@Override
		protected File doInBackground(String... strings) {
		File file = null;
		InputStream inputStream = null;
		MainActivity activity = mainActivityWR.get();
		try{
		URL uri = new URL(strings[0]);
		HttpURLConnection urlConnection = (HttpURLConnection) uri.openConnection();
		if (urlConnection.getResponseCode() == 200) {
		inputStream = new BufferedInputStream(urlConnection.getInputStream());
		}

		file = File.createTempFile(strings[1], null, activity.getCacheDir());
		OutputStream outputStream = new FileOutputStream(file);
		Utils.readFromInputStreamToOutputStream(inputStream, outputStream);
		} catch (IOException e){
		Log.e("RetrievePDFStream", "Error cannot get file at URL");
		return null;
		}

		return file;
		}

		@Override
		protected void onPostExecute(File file) {
		MainActivity activity = mainActivityWR.get();

		if (activity != null) {
		activity.saveFileAndDisplay(file);
		}
		}
		}

app/src/main/java/com/gsnathan/pdfviewer/Utils.java

+16 −0

Original line number	Diff line number	Diff line
		@@ -33,8 +33,12 @@ import android.graphics.Color;
		import android.graphics.drawable.Drawable;
		import android.net.Uri;
		import android.os.Build;
		import android.util.Log;

		import java.io.File;
		import java.io.IOException;
		import java.io.InputStream;
		import java.io.OutputStream;

		import androidx.appcompat.app.AppCompatActivity;
		import androidx.core.content.ContextCompat;
		@@ -98,4 +102,16 @@ public class Utils {
		static String getAppVersion() {
		return BuildConfig.VERSION_NAME;
		}

		static void readFromInputStreamToOutputStream (InputStream inputStream, OutputStream outputStream) throws IOException {
		byte[] buffer = new byte[8 * 1024];
		int bytesRead = inputStream.read(buffer);
		while (bytesRead > -1) {
		outputStream.write(buffer, 0, bytesRead);
		bytesRead = inputStream.read(buffer);
		}

		outputStream.flush();
		outputStream.close();
		}
		}