I examined similar subjects, but I couldn't do it. I'm trying to share .mp3 file with LongClick button. I found it for JPEG files. One guy created method for sharing jpeg file. How can I convert it for .mp3 files?
package com.example.tunch.trap;
import...
public class sansar extends AppCompatActivity {
private String yardik;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_sansar);
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
yardik = createImageOnSDCard(R.raw.yardik_denizi);
final MediaPlayer yardikdenizi = MediaPlayer.create(this, R.raw.yardik_denizi);
Button btnYardik = (Button) findViewById(R.id.btnSansar_1);
btnYardik.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(yardikdenizi.isPlaying()){
yardikdenizi.seekTo(0);
}
yardikdenizi.start();
}
});
btnYardik.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
Uri path= FileProvider.getUriForFile(sansar.this, "com.example.tunch.trap", new File(yardik));
Intent shareYardik = new Intent();
shareYardik.setAction(Intent.ACTION_SEND);
shareYardik.putExtra(Intent.EXTRA_TEXT,"Bu ses dosyasını gönderiyorum");
shareYardik.putExtra(Intent.EXTRA_STREAM, path);
shareYardik.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
shareYardik.setType("audio/mp3");
startActivity(Intent.createChooser(shareYardik, "Paylas.."));
return true;
}
});
}
private String createImageOnSDCard(int resID) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), resID);
String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/" + resID +".mp3";
File file = new File(path);
try {
OutputStream out = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
}
catch (Exception e){
e.printStackTrace();
}
return file.getPath();
}
}
This is all Java code. createImageOnSDCard method is for images. I want to use it for my audio file (yardik_denizi.mp3). When I run this, it works but program is trying to send jpeg file. So it doesn't work literally :) How should I change that last part?
You need a method that copies a private raw resource content (R.raw.yardik_denizi) to a publicly readable file such that the latter can be shared with other applications:
public void copyPrivateRawResuorceToPubliclyAccessibleFile(#RawRes int resID,
#NonNull String outputFile) {
InputStream inputStream = null;
FileOutputStream outputStream = null;
try {
inputStream = getResources().openRawResource(resID);
outputStream = openFileOutput(outputFile, Context.MODE_WORLD_READABLE
| Context.MODE_APPEND);
byte[] buffer = new byte[1024];
int length = 0;
try {
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
} catch (IOException ioe) {
/* ignore */
}
} catch (FileNotFoundException fnfe) {
/* ignore */
} finally {
try {
inputStream.close();
} catch (IOException ioe) {
/* ignore */
}
try {
outputStream.close();
} catch (IOException ioe) {
/* ignore */
}
}
}
and then:
copyPrivateRawResuorceToPubliclyAccessibleFile(R.raw.yardik_denizi, "sound.mp3");
final Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("audio/*");
Uri uri = Uri.fromFile(getFileStreamPath("sound.mp3"));
shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(shareIntent, "Share Sound File"));
You should change the path for uri at
Uri path= FileProvider.getUriForFile(sansar.this, "com.example.tunch.trap", new File(change_it_path_to_yardik_denizi.mp3));
Finally i got the answer. I can send mp3 files to other apps with this code.
copyFiletoExternalStorage(R.raw.yardik_denizi, "yardik_denizi.mp3");
Uri path= FileProvider.getUriForFile(sansar.this,
"com.example.tunch.trap", new File(Environment.getExternalStorageDirectory() +
"/Android/data/yardik_denizi.mp3"));
Intent shareYardik = new Intent();
shareYardik.setAction(Intent.ACTION_SEND);
shareYardik.putExtra(Intent.EXTRA_TEXT,"Bu ses dosyasını gönderiyorum");
shareYardik.putExtra(Intent.EXTRA_STREAM, path);
shareYardik.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
shareYardik.setType("audio/mp3");
startActivity(Intent.createChooser(shareYardik, "Paylas.."));
And need to create a method to save data in external store.
private void copyFiletoExternalStorage (int resourceId, String resourceName){
String pathSDCard = Environment.getExternalStorageDirectory() + "/Android/data/"
+ resourceName;
try{
InputStream in = getResources().openRawResource(resourceId);
FileOutputStream out = null;
out = new FileOutputStream(pathSDCard);
byte[] buff = new byte[1024];
int read = 0;
try {
while ((read = in.read(buff)) > 0) {
out.write(buff, 0, read);
}
} finally {
in.close();
out.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Please help me to add update code to my app to be update from my server thank you
nothing worked from net , i need complete guide
You can't install your app without users permission and root access but you can download your applications new version from server then ask users for install. Here is an example:
{
PackageManager manager = context.getPackageManager();
try {
PackageInfo info = manager.getPackageInfo(context.getPackageName(), 0);
version = info.versionName;
if (newversion.replace(".", "") < version.replace(".", "")) {
new DownloadFileFromURL().execute("http://exampl.com/Content/files/example.apk");
}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
}
private class DownloadFileFromURL extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = onCreateDialog();
}
#Override
protected String doInBackground(String... f_url) {
int count;
try {
File file = new File(Environment.getExternalStorageDirectory() + "/example.apk");
if (file.exists()) {
file.delete();
}
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
int lenghtOfFile = conection.getContentLength();
pDialog.setMax(lenghtOfFile / 1024);
InputStream input = new BufferedInputStream(url.openStream(), 8192);
OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory() + "/example.apk");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress(total / 1024 + "");
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception ignored) {
}
return null;
}
protected void onProgressUpdate(String... progress) {
pDialog.setProgress(Integer.parseInt(progress[0]));
}
#Override
protected void onPostExecute(String file_url) {
dialog.dismiss();
File file = new File(Environment.getExternalStorageDirectory() + "/example.apk");
if (file.exists()) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
} else {
//finish() or whatever you want
}
}
}
i am trying to implement a pdf reader via a pdf library from git hub https://github.com/jblough/Android-Pdf-Viewer-Library but when i implement the code.. all i am getting is a blank page.. the url is correct the pdf has content and this is similar to this q .. Example of code to implement a PDF reader
my code consist of multiple methods, the main method is used to select the which pdf should be chosen to display. then the pdf name is passed on to method "copyreadassets"
public void CopyReadAssets(String url) {
AssetManager assetManager = getApplicationContext().getAssets();
InputStream in = null;
OutputStream out = null;
File file = new File(getApplicationContext().getFilesDir(), url);
try {
in = assetManager.open(url);
out = getApplicationContext().openFileOutput(file.getName(),
Context.MODE_WORLD_READABLE);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
}
catch (Exception e) {
Log.e("tag", e.getMessage());
}
String path = "file://" + getApplicationContext().getFilesDir() + "/"+url;
openPdfIntent(path); }
the openpdfintentmethod is used to open the values
private void openPdfIntent(String path) {
// TODO Auto-generated method stub
try {
final Intent intent = new Intent(Question_Point_Main.this, Pdf.class);
intent.putExtra(PdfViewerActivity.EXTRA_PDFFILENAME, path);
startActivity(intent);
} catch (Exception e) {
e.printStackTrace();
}
}
pdf.class contains the following..
public class Pdf extends Activity{
public int getPreviousPageImageResource() {
return R.drawable.left_arrow; }
public int getNextPageImageResource() {
return R.drawable.right_arrow; }
public int getZoomInImageResource() {
return R.drawable.zoom_in; }
public int getZoomOutImageResource() {
return R.drawable.zoom_out; }
public int getPdfPasswordLayoutResource() {
return R.layout.pdf_file_password; }
public int getPdfPageNumberResource() {
return R.layout.dialog_pagenumber; }
public int getPdfPasswordEditField() {
return R.id.etPassword; }
public int getPdfPasswordOkButton() {
return R.id.btOK; }
public int getPdfPasswordExitButton() {
return R.id.btExit; }
public int getPdfPageNumberEditField() {
return R.id.pagenum_edit; }
}
In your AndroidManifest.xml file
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<activity android:name="com.example.readassetpdf.myPDFActivity"></activity>
in your case activity is pdf class
<activity android:name="com.example.readassetpdf.pdf"></activity>
and use following method
public void CopyReadAssets(String url) {
AssetManager assetManager = getApplicationContext().getAssets();
InputStream in = null;
OutputStream out = null;
File file = new File(getApplicationContext().getFilesDir(), url);
try {
in = assetManager.open(url);
//out = getApplicationContext().openFileOutput(file.getName(),
//Context.MODE_WORLD_READABLE);
out=new FileOutputStream(Environment.getExternalStorageDirectory().getAbsolutePath()+"/mypdf.pdf");
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
}
catch (Exception e) {
Log.e("tag", e.getMessage());
}
String path = Environment.getExternalStorageDirectory().getAbsolutePath()+"/mypdf.pdf";
openPdfIntent(path);
}
and call it as below
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
CopyReadAssets("mypdf.pdf");
}
And the function copyfile is as below
private void copyFile(InputStream in, OutputStream out) throws IOException{
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
The replacement is
out = getApplicationContext().openFileOutput(file.getName(),
Context.MODE_WORLD_READABLE);
to
out=new FileOutputStream(Environment.getExternalStorageDirectory().getAbsolutePath()+"/mypdf.pdf");
public void DOCS(View btnDocs)
{
File fileBrochure = new File("android.resource://com.project.datastructure/assets/abc.pdf");
if (!fileBrochure.exists())
{
CopyAssetsbrochure();
}
/** PDF reader code */
File file = new File("android.resource://com.project.datastructure/assets/abc.pdf");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
try
{
getApplicationContext().startActivity(intent);
}
catch (ActivityNotFoundException e)
{
Toast.makeText(Stack_dr.this, "NO Pdf Viewer", Toast.LENGTH_SHORT).show();
}
}
private void CopyAssetsbrochure() {
AssetManager assetManager = getAssets();
String[] files = null;
try
{
files = assetManager.list("");
}
catch (IOException e){}
for(int i=0; i<files.length; i++)
{
String fStr = files[i];
if(fStr.equalsIgnoreCase("abc.pdf"))
{
InputStream in = null;
OutputStream out = null;
try
{
in = assetManager.open(files[i]);
out = new FileOutputStream("/sdcard/" + files[i]);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
break;
}
catch(Exception e){}
}
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException
{
byte[] buffer = new byte[1024];
int read;
while((read = in.read(buffer)) != -1){
out.write(buffer, 0, read);
}
}
I am trying to read a pdf file from assets folder which is present in my application folder . Everything is working perfectly when i click on my DOCS button a pop up comes to let me choose an application for opening the pdf i.e "abc.pdf" but after selecting an option i get an error message "The file path is not valid". I think their is some problem with the path which i have specified in the code.
please help
Try this
public class SampleActivity extends Activity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
CopyReadAssets();
}
private void CopyReadAssets()
{
AssetManager assetManager = getAssets();
InputStream in = null;
OutputStream out = null;
File file = new File(getFilesDir(), "abc.pdf");
try
{
in = assetManager.open("abc.pdf");
out = openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e)
{
Log.e("tag", e.getMessage());
}
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
Uri.parse("file://" + getFilesDir() + "/abc.pdf"),
"application/pdf");
startActivity(intent);
}
private void copyFile(InputStream in, OutputStream out) throws IOException
{
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1)
{
out.write(buffer, 0, read);
}
}
}
Make sure to include
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
in manifest
You can do it like this (tested and working on API 27)
Step 1
Add following dependency in your app gradle:
implementation 'com.github.barteksc:android-pdf-viewer:2.8.2'
Step 2
Add following XML code:
<com.github.barteksc.pdfviewer.PDFView
android:id="#+id/pdfv"
android:layout_width="match_parent"
android:layout_height="match_parent">
</com.github.barteksc.pdfviewer.PDFView>
Step 3
Add following code in your java file:
public class MainActivity extends AppCompatActivity {
PDFView pdfView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pdfView=findViewById(R.id.pdfv);
pdfView.fromAsset("filename.pdf").load();
}
}
These changes will load a PDF file on creation of your activity.
Though this has been answered, I wanted to share my solution as I think it is a bit easier to include.
Usage:
new OpenLocalPDF(context, 'nameOfPDFStoredInAssets').execute()
And here is the OpenLocalPDF class:
public class OpenLocalPDF {
private static String TAG = OpenLocalPDF.class.getSimpleName();
private WeakReference<Context> contextWeakReference;
private String fileName;
public OpenLocalPDF(Context context, String fileName) {
this.contextWeakReference = new WeakReference<>(context);
this.fileName = fileName.endsWith("pdf") ? fileName : fileName + ".pdf";
}
public void execute() {
Context context = contextWeakReference.get();
if (context != null) {
new CopyFileAsyncTask().execute();
}
}
private class CopyFileAsyncTask extends AsyncTask<Void, Void, File> {
final String appDirectoryName = BuildConfig.APPLICATION_ID;
final File fileRoot = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOCUMENTS), appDirectoryName);
#Override
protected File doInBackground(Void... params) {
Context context = contextWeakReference.get();
AssetManager assetManager = context.getAssets();
File file = new File(fileRoot, fileName);
InputStream in = null;
OutputStream out = null;
try {
file.mkdirs();
if (file.exists()) {
file.delete();
}
file.createNewFile();
in = assetManager.open(fileName);
Log.d(TAG, "In");
out = new FileOutputStream(file);
Log.d(TAG, "Out");
Log.d(TAG, "Copy file");
copyFile(in, out);
Log.d(TAG, "Close");
in.close();
out.flush();
out.close();
return file;
} catch (Exception e)
{
Log.e(TAG, e.getMessage());
}
return null;
}
private void copyFile(InputStream in, OutputStream out) throws IOException
{
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1)
{
out.write(buffer, 0, read);
}
}
#Override
protected void onPostExecute(File file) {
super.onPostExecute(file);
Context context = contextWeakReference.get();
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
Uri.fromFile(file),
"application/pdf");
context.startActivity(intent);
}
}
}
add this permission in Manifest.xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
like say sunsil, but in the case for external directory.
import android.app.Activity;
import android.content.Intent;
import android.content.res.AssetManager;
import android.net.Uri;
import android.os.Environment;
import android.os.Bundle;
import android.util.Log;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
copyReadAssets();
}
private void copyReadAssets()
{
AssetManager assetManager = getAssets();
InputStream in = null;
OutputStream out = null;
String strDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)+ File.separator + "Pdfs";
File fileDir = new File(strDir);
fileDir.mkdirs(); // crear la ruta si no existe
File file = new File(fileDir, "example2.pdf");
try
{
in = assetManager.open("example.pdf"); //leer el archivo de assets
out = new BufferedOutputStream(new FileOutputStream(file)); //crear el archivo
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e)
{
Log.e("tag", e.getMessage());
}
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + File.separator + "Pdfs" + "/example2.pdf"), "application/pdf");
startActivity(intent);
}
private void copyFile(InputStream in, OutputStream out) throws IOException
{
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1)
{
out.write(buffer, 0, read);
}
}
}
change parts of code like these:
out = new BufferedOutputStream(new FileOutputStream(file));
the before example is for Pdfs, in case of to example .txt
FileOutputStream fos = new FileOutputStream(file);
This works for me.
Step 1: In MainActivity.java
public class SampleActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//call this method by passing file name in params.
readFromAssets("User guide.pdf");
}
public static void readFromAssets(String fileName) {
AssetManager assetManager = getAssets();
InputStream in = null;
OutputStream out = null;
File file = new File(mContext.getFilesDir(), fileName);
try {
in = assetManager.open(fileName);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
out = mContext.openFileOutput(file.getName(), Context.MODE_PRIVATE);
} else {
out = mContext.openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);
}
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e) {
Log.e("tag", e.getMessage());
}
Uri pdfFileURI;
Intent intent = new Intent(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
pdfFileURI = FileProvider.getUriForFile(mContext,
BuildConfig.APPLICATION_ID + ".provider", file);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
} else {
pdfFileURI = Uri.parse("file://" + mContext.getFilesDir() + "/" + fileName);
}
intent.setDataAndType(pdfFileURI, "application/pdf");
mContext.startActivity(intent);
}
private static void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
}
Step 2: Create provider_paths.xml inside res->xml->provider_paths.xml. See here
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path
name="external"
path="." />
<root-path
name="root"
path="." />
</paths>
Step 3: In AndroidManifest.xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppThemeMaterial">
<!-- INSIDE APPLICATION TAG -->
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
</application>
No answer worked for me out-of-the-box when attempting to open a file via an intent (in my case PDF) from the assets folder. So here is my solution combining 2 brilliant answers I'm sure it will help someone. Must be for api >= 24.
Once you have followed this link and added the your own GenericFileProvider and declared it in your manifest within the Application tag and created the provider_paths.xml simply use the below class and call it like:
OpenLocalPDF(this, "YOUR_PDF_NAME_IN_ASSETS_FOLDER.pdf").execute()
OpenLocalPdf.kt: (kudos too the OP https://stackoverflow.com/a/41212708/1133011)
import android.content.Context
import android.content.Intent
import android.content.res.AssetManager
import android.os.AsyncTask
import android.util.Log
import androidx.core.content.FileProvider
import java.io.File
import java.io.FileOutputStream
import java.io.InputStream
import java.io.OutputStream
import java.lang.ref.WeakReference
class OpenLocalPDF(context: Context?, fileName: String?) {
private val contextWeakReference: WeakReference<Context?>?
private val fileName: String?
fun execute() {
val context: Context = contextWeakReference!!.get()!!
if (context != null) {
CopyFileAsyncTask().execute()
}
}
private inner class CopyFileAsyncTask :
AsyncTask<Void?, Void?, File?>() {
val appDirectoryName: String? = co.za.umbiflow.BuildConfig.APPLICATION_ID
val fileRoot: File? = File(
android.os.Environment.getExternalStoragePublicDirectory(
android.os.Environment.DIRECTORY_DOCUMENTS
), appDirectoryName
)
override fun doInBackground(vararg params: Void?): File? {
val context: Context = contextWeakReference!!.get()!!
val assetManager: AssetManager = context.getAssets()
val file = File(fileRoot, fileName)
var `in`: InputStream? = null
var out: OutputStream? = null
try {
file.mkdirs()
if (file.exists()) {
file.delete()
}
file.createNewFile()
`in` = assetManager.open(fileName)
out = FileOutputStream(file)
copyFile(`in`, out)
`in`.close()
out.flush()
out.close()
return file
} catch (e: Exception) {
Log.e(TAG, e.message)
}
return null
}
private fun copyFile(`in`: InputStream, out: OutputStream) {
val buffer = ByteArray(1024)
var read: Int
while (`in`.read(buffer).also { read = it } != -1) {
out.write(buffer, 0, read)
}
}
override fun onPostExecute(file: File?) {
super.onPostExecute(file)
val context: Context = contextWeakReference!!.get()!!
var pdfUri =
FileProvider.getUriForFile(
context,
context.packageName + ".provider",
file!!
)
val intent = Intent()
intent.action = Intent.ACTION_VIEW
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
intent.setDataAndType(
pdfUri,
"application/pdf"
)
context.startActivity(intent)
}
}
companion object {
private val TAG = OpenLocalPDF::class.java.simpleName
}
init {
contextWeakReference = WeakReference(context)
this.fileName = if (fileName!!.endsWith("pdf")) fileName else "$fileName.pdf"
}
}
This is a way to open multiple PDF files from assets using a zip file.
Step1: Copy a zip file(pdf.zip) into assets folder that contains the list of pdfs
Step2: Write PDF's into external cache inside the app in a Utils class
public static void writePDFs(Context context) {
try {
InputStream inputStream = context.getApplicationContext().getAssets().open("pdf.zip");
ZipInputStream zipInputStream = new ZipInputStream(inputStream);
ZipEntry zipEntry;
File file = new File(context.getExternalCacheDir().getAbsolutePath(), "PDFs");
if (!file.getAbsoluteFile().exists()) {
if (file.mkdir()) {
BufferedOutputStream outputStream;
byte[] buffer = new byte[1024];
int count;
while ((zipEntry = zipInputStream.getNextEntry()) != null) {
String s1 = file + "/" + zipEntry.getName();
File file1 = new File(s1);
if (!file1.exists()) {
file1.createNewFile();
}
outputStream = new BufferedOutputStream(new FileOutputStream(file1));
while ((count = zipInputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, count);
}
outputStream.flush();
outputStream.close();
zipInputStream.closeEntry();
}
}
zipInputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
Step3: Call the above function in Activities onCreate
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FileUtils.writePDFs(this);
}
Step4: Create a common function in Utils class to open the PDF
public static void openPDF(Activity activity, String fileName) {
if (activity == null) return;
File file = new File(activity.getExternalCacheDir().getAbsolutePath() + "/PDFs" + "/" + fileName);
Uri docUri = GenericFileProvider.getUriForFile(activity, activity.getApplicationContext().getPackageName(), file);
try {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setDataAndType(docUri, "application/pdf");
} else {
intent.setDataAndType(Uri.fromFile(file), "application/pdf");
}
activity.startActivityForResult(intent, ACTIVITY_VIEW_ATTACHMENT);
} catch (ActivityNotFoundException e) {
e.printStackTrace();
}
}
Step5: Call the openPDF function on click on the view in Activity
myView.setOnClickListener(v -> ApplicationUtils.openPDF(this, "MyPdfFile.pdf"));
I had success, using the answer from cYrixmorten, with the OpenLocalPDF class.
But, Environment.DIRECTORY_DOCUMENTS is not supported for Android 18. To support Android 18 - 28, I had to make the following changes.
In "CopyFileAsyncTask", change the fileRoot declaration:
final File fileRoot = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOCUMENTS), appDirectoryName);
To this:
final File fileRoot = new File(Environment.getExternalStorageDirectory() + "/YourAppName");
In "onPostExecute", change this:
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
Uri.fromFile(file),
"application/pdf");
context.startActivity(intent);
To this:
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(FileProvider.getUriForFile(context, "com.example.yourappname.provider", file), "application/pdf");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
context.startActivity(intent);
Finally, setup your manifest to support the FileProvider as described in this post.
try this:
public String getAssetsPdfPath(Context context) {
String filePath = context.getFilesDir() + File.separator + "myFile.pdf";
File destinationFile = new File(filePath);
try {
FileOutputStream outputStream = new FileOutputStream(destinationFile);
InputStream inputStream = context.getAssets().open("myFile.pdf");
byte[] buffer = new byte[1024];
int length = 0;
while ((length = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, length);
}
outputStream.close();
inputStream.close();
} catch (IOException e) {
Log.e(context.getClass().getSimpleName(), "Error.");
}
return destinationFile.getPath();
}
If you want to open a .pdf file that is stored locally in the assets folder without using an Intent to launch an external app, I suggest using the Android class PdfRenderer. Documentation found here.
This is a good example that worked for me.
However, this example wouldn't run when I downloaded it. I had to change it a bit to use the copyReadAssets() function as mentioned in the other answers here, then to reference the file (after it has been copied) I use:
File file = new File("/data/data/" + getContext().getPackageName() + "/files/mypdf.pdf");
I also ended up modifying onAttach() because it was using the deprecated form of onAttach() and closeRenderer() because it was throwing errors for closing objects that were null.
So my complete PdfRendererBasicFragment.java file looks like this:
package com.example.android.pdfrendererbasic;
import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.pdf.PdfRenderer;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* This fragment has a big {#ImageView} that shows PDF pages, and 2 {#link android.widget.Button}s to move between
* pages. We use a {#link android.graphics.pdf.PdfRenderer} to render PDF pages as {#link android.graphics.Bitmap}s.
*/
public class PdfRendererBasicFragment extends Fragment implements View.OnClickListener {
/**
* Key string for saving the state of current page index.
*/
private static final String STATE_CURRENT_PAGE_INDEX = "current_page_index";
/**
* File descriptor of the PDF.
*/
private ParcelFileDescriptor mFileDescriptor;
/**
* {#link android.graphics.pdf.PdfRenderer} to render the PDF.
*/
private PdfRenderer mPdfRenderer;
/**
* Page that is currently shown on the screen.
*/
private PdfRenderer.Page mCurrentPage;
/**
* {#link android.widget.ImageView} that shows a PDF page as a {#link android.graphics.Bitmap}
*/
private ImageView mImageView;
/**
* {#link android.widget.Button} to move to the previous page.
*/
private Button mButtonPrevious;
/**
* {#link android.widget.Button} to move to the next page.
*/
private Button mButtonNext;
public PdfRendererBasicFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_pdf_renderer_basic, container, false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
// Retain view references.
mImageView = (ImageView) view.findViewById(R.id.image);
mButtonPrevious = (Button) view.findViewById(R.id.previous);
mButtonNext = (Button) view.findViewById(R.id.next);
// Bind events.
mButtonPrevious.setOnClickListener(this);
mButtonNext.setOnClickListener(this);
// Show the first page by default.
int index = 0;
// If there is a savedInstanceState (screen orientations, etc.), we restore the page index.
if (null != savedInstanceState) {
index = savedInstanceState.getInt(STATE_CURRENT_PAGE_INDEX, 0);
}
showPage(index);
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
try {
openRenderer(context);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(context, "Error! " + e.getMessage(), Toast.LENGTH_SHORT).show();
getActivity().finish();
}
}
#Override
public void onDetach() {
try {
closeRenderer();
} catch (IOException e) {
e.printStackTrace();
}
super.onDetach();
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (null != mCurrentPage) {
outState.putInt(STATE_CURRENT_PAGE_INDEX, mCurrentPage.getIndex());
}
}
/**
* Sets up a {#link android.graphics.pdf.PdfRenderer} and related resources.
*/
private void openRenderer(Context context) throws IOException {
// Copy the pdf to a usable location
CopyReadAssets();
File file = new File("/data/data/" + context.getPackageName() + "/files/sample.pdf");
mPdfRenderer = new PdfRenderer(ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY));
}
/**
* Closes the {#link android.graphics.pdf.PdfRenderer} and related resources.
*
* #throws java.io.IOException When the PDF file cannot be closed.
*/
private void closeRenderer() throws IOException {
if (mCurrentPage != null) {
mCurrentPage.close();
}
if (mPdfRenderer != null) {
mPdfRenderer.close();
}
if (mFileDescriptor != null) {
mFileDescriptor.close();
}
}
/**
* Shows the specified page of PDF to the screen.
*
* #param index The page index.
*/
private void showPage(int index) {
if (mPdfRenderer.getPageCount() <= index) {
return;
}
// Make sure to close the current page before opening another one.
if (null != mCurrentPage) {
mCurrentPage.close();
}
// Use `openPage` to open a specific page in PDF.
mCurrentPage = mPdfRenderer.openPage(index);
// Important: the destination bitmap must be ARGB (not RGB).
Bitmap bitmap = Bitmap.createBitmap(mCurrentPage.getWidth(), mCurrentPage.getHeight(),
Bitmap.Config.ARGB_8888);
// Here, we render the page onto the Bitmap.
// To render a portion of the page, use the second and third parameter. Pass nulls to get
// the default result.
// Pass either RENDER_MODE_FOR_DISPLAY or RENDER_MODE_FOR_PRINT for the last parameter.
mCurrentPage.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
// We are ready to show the Bitmap to user.
mImageView.setImageBitmap(bitmap);
updateUi();
}
/**
* Updates the state of 2 control buttons in response to the current page index.
*/
private void updateUi() {
int index = mCurrentPage.getIndex();
int pageCount = mPdfRenderer.getPageCount();
mButtonPrevious.setEnabled(0 != index);
mButtonNext.setEnabled(index + 1 < pageCount);
getActivity().setTitle(getString(R.string.app_name_with_index, index + 1, pageCount));
}
/**
* Gets the number of pages in the PDF. This method is marked as public for testing.
*
* #return The number of pages.
*/
public int getPageCount() {
return mPdfRenderer.getPageCount();
}
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.previous: {
// Move to the previous page
showPage(mCurrentPage.getIndex() - 1);
break;
}
case R.id.next: {
// Move to the next page
showPage(mCurrentPage.getIndex() + 1);
break;
}
}
}
private void CopyReadAssets()
{
AssetManager assetManager = getActivity().getAssets();
InputStream in = null;
OutputStream out = null;
File file = new File(getActivity().getFilesDir(), "sample.pdf");
if(!file.exists()) {
try {
in = assetManager.open("sample.pdf");
out = getActivity().openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e) {
Log.e("tag", e.getMessage());
}
}
else {
Log.d("test", "file already exists");
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException
{
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1)
{
out.write(buffer, 0, read);
}
}
}
This code work on every android version:
Activity:
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.net.Uri;
import android.os.Environment;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.util.Log;
import android.widget.Toast;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import unimedbh.UnimedBH.R;
public class MainActivity extends Activity {
private static final int MY_PERMISSION_REQUEST_STORAGE = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, MY_PERMISSION_REQUEST_STORAGE);
} else {
copyReadAssets("YOUR_PDF_NAME.pdf");
}
}
private void copyReadAssets(String fileName) {
String dirPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/MyFiles";
File dir = new File(dirPath);
if (!dir.exists()) {
dir.mkdirs();
}
AssetManager assetManager = getAssets();
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open(fileName);
File outFile = new File(dirPath, fileName);
out = new FileOutputStream(outFile);
copyFile(in, out);
Intent intent = new Intent(Intent.ACTION_VIEW, FileProvider.getUriForFile(this, "com.package.name.fileprovider", outFile));
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_ACTIVITY_NO_HISTORY);
startActivity(intent);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, "Error!", Toast.LENGTH_SHORT).show();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
}
Manifest.xml:
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.package.name.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
file_paths.xml:
<paths>
<files-path name="app_directory" path="directory/"/>
</paths>
Tested in API 16-28, worked on all api´s!