How to open File from sdcard in Android

Just open your main XML file and paste below code:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/ll"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="My BOOK"

        android:onClick="book"/>

</LinearLayout>


Now open your java file and paste below code: 

package com.smr; //package name

import java.io.File;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.Toast;

import android.app.Activity;

import android.content.ActivityNotFoundException;

import android.content.Intent;

public class MainActivity extends Activity  {

      @Override

      protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

                       

           

      }

      public void book(View v)

      {

//your pdf file path

            File file=new File("/sdcard/anna.pdf");

            if(file.exists())

            {

                  Intent i= new Intent(Intent.ACTION_VIEW);

//set pdf to doc if you want to open doc

                  i.setDataAndType(Uri.fromFile(file),"application/pdf");

                  i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

                  try

                  {

                  startActivity(i);

                  }

                  catch(ActivityNotFoundException e)

                  {

//if pdf reader not found than open browser to download pdf reader

                        Intent i1=new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=com.adobe.reader&hl=en"));

                        startActivity(i1);

                  }

            }

            else

            {

//if pdf not found on given location

                  Toast.makeText(getApplicationContext(),"anna.pdf not found", Toast.LENGTH_LONG).show();

            }

      }

}
 

Now run your code