OpenPDF file - Android

1. create assets folder in src under your app name.
2. In this assets folder keep your pdf files  e.g. file.pdf.
3 now come your activity i.e  MainActivity.java
4. setListener on any UI component what you want i.e (Button,ImageView,ImageButton);
5. In this listener call one user defined method i.e. openPDFFiles("file.pdf");
the openPDFFiles() method have below code:—-


 private void openPDFFiles(String fileName) //fileName is the pdf file name which is keep in assets folder. ex file.pdf
	{
        AssetManager assetManager = getAssets();

        InputStream in = null;
        OutputStream out = null;
        File file = new File(getFilesDir(), "");
        try {
            in = assetManager.open(fileName);
            out = openFileOutput(file.getName(), MODE_PRIVATE);

            copyFile(in, out);
            in.close();
            in = null;
            out.flush();
            out.close();
            out = null;
        } catch (Exception e) {
            Log.e(TAG, e.getMessage());
        }
        try {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setDataAndType(Uri.parse("file://" + getFilesDir() + "/"+fileName), "application/pdf");
            startActivity(intent);
        }catch (RuntimeException ex){
            Toast.makeText(MainActivity.this, "There's no PDF Reader found in your device", Toast.LENGTH_SHORT).show();
        }
       
    }

    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);
        }
    }

Thank you ,this is really helpful .

i dons understand, would you share the step by step proccedure?

45

Notice that the intent.setDataAndType(Uri.parse("file://" + getFilesDir() + "/"+fileName), "application/pdf"); is not working anymore for Version <24

http://onetouchcode.com/2017/05/24/android-android-os-fileuriexposedexception-reason/

I have used this piece of code ,i am new to android,I cannot open the .pdf files of my html/php from assets folder what necessary changes should make in code so that it works??

package co.itechsyst.srinot;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.content.Intent;
import android.net.Uri;
import android.content.ActivityNotFoundException;

public class Main2Activity extends AppCompatActivity {

WebView myPersonalsite;
String URL;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);

    URL="file:///android_asset/srinot/main.php";
    myPersonalsite=(WebView) findViewById(R.id.myPersonalsite);

    myPersonalsite.getSettings().setJavaScriptEnabled(true);
    myPersonalsite.loadUrl(URL);
    myPersonalsite.setWebViewClient(new WebViewClient() {

                                        @Override
                                        public boolean shouldOverrideUrlLoading(WebView view, String url) {
                                            if (url.endsWith(".pdf")) {
                                                
                                                Intent target = new Intent(Intent.ACTION_VIEW);
                                                target.setDataAndType(Uri.parse(url), "application/pdf");
                                                target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

                                                Intent intent = Intent.createChooser(target, "Open File");
                                                try {
                                                    view.getContext().startActivity(intent);
                                                } catch (ActivityNotFoundException e) {
                                                    //user does not have a pdf viewer installed
                                                }
                                            } else {
                                                myPersonalsite.loadUrl(url);
                                            }
                                            return true;
                                        }
                                    }
    );
}




@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (event.getAction() == KeyEvent.ACTION_DOWN) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                if (myPersonalsite.canGoBack()) {
                    myPersonalsite.goBack();
                } else {
                    finish();
                }
                return true;
        }

    }
    return super.onKeyDown(keyCode, event);
}

}