In this post we will see that how to open or read pdf file programmatically in android. If user open android app then pdf file will be open. First put your given pdf file in app\src\main\assets path .You can customise according to your need.
I have shown here with both option :
- given pdf file will open after app open .
- when user click on custom button then given pdf file will be open.
AndroidManifest.xml :
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<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.cacompadda.openpdf"> <application android:allowBackup="true" android:icon="@mipmap/icon" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity" android:label="@string/app_name" android:theme="@style/AppTheme.NoActionBar"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> |
MainActivity.java :
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package com.cacompadda.openpdf; import android.content.Context; import android.content.Intent; import android.content.res.AssetManager; import android.net.Uri; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.util.Log; import android.view.View; import android.support.design.widget.NavigationView; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); ActionBarDrawerToggle toggle = new ActionBarDrawerToggle( this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); drawer.setDrawerListener(toggle); toggle.syncState(); NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); navigationView.setNavigationItemSelectedListener(this); CopyReadPDFFromAssets(); } @Override public void onBackPressed() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawer(GravityCompat.START); } else { super.onBackPressed(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { // Handle navigation view item clicks here. int id = item.getItemId(); if (id == R.id.nav_gallery) { // Handle the camera action Intent i =new Intent(this,MainActivity.class); startActivity(i); } DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); drawer.closeDrawer(GravityCompat.START); return true; } private void CopyReadPDFFromAssets() { AssetManager assetManager = getAssets(); InputStream in = null; OutputStream out = null; File file = new File(getFilesDir(), "filename.pdf"); try { in = assetManager.open("filename.pdf"); out = openFileOutput(file.getName(), Context.MODE_WORLD_READABLE); copyPdfFile(in, out); in.close(); in = null; out.flush(); out.close(); out = null; } catch (Exception e) { Log.e("exception", e.getMessage()); } Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType( Uri.parse("file://" + getFilesDir() + "/filename.pdf"), "application/pdf"); startActivity(intent); } private void copyPdfFile(InputStream in, OutputStream out) throws IOException { byte[] buffer = new byte[1024]; int read; while ((read = in.read(buffer)) != -1) { out.write(buffer, 0, read); } } public void ask(View v){ switch (v.getId()){ case R.id.openpdf: //openpdf is id of button CopyReadPDFFromAssets(); break; default: break; } } } |
content_main.xml :
only button code snippet:
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<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="50dp"> <Button android:id="@+id/openpdf" android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="ask" android:text="Open PDF" android:background="#74ee16" /> </LinearLayout> |
MainAcitivity Screen :
In this way you can open a pdf file in your app programmatically. If you have any doubt then comment below.
Do you have any github link for this project?
https://github.com/AjinkyaHanchate/OPEN_PDF_ANDROID