title: Navigation drawer to QR scanner app android studio
body: <p>Hello I have a problem in creating apps.. I'm relatively new to coding and I'm trying to connect two templates to one app, I have this template app with QR scanner and another template app with navigation drawer activity.. My problem is that I have to add navigation drawer to the qr scanner app or add the qr scanner to fragments in the another app...</p>
  
  <p>My  <strong>QR SCANNER APP is the following</strong></p>
  
  <p><a href="https://github.com/varvet/BarcodeReaderSample" rel="nofollow noreferrer">https://github.com/varvet/BarcodeReaderSample</a></p>
  
  <p>It's pretty basic it has button and you press it to scan QR code or barcode</p>
  
  <p>Now I want to add navigation drawer there but I really don't know how to because I have tried but they always lead to multiple errors</p>
  
  <p>My Navigation drawer app is the following </p>
  
  <p>MainActivity</p>
  
  <pre><code>package net.simplifiedcoding.navigationdrawerexample;
  
  import android.os.Bundle;
  import android.support.design.widget.FloatingActionButton;
  import android.support.design.widget.Snackbar;
  import android.support.v4.app.Fragment;
  import android.support.v4.app.FragmentTransaction;
  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;
  
  
  
  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);
  
  
  
          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);
  
          //add this line to display menu1 when the activity is loaded
          displaySelectedScreen(R.id.nav_menu1);
      }
  
      @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);
      }
  
      private void displaySelectedScreen(int itemId) {
  
          //creating fragment object
          Fragment fragment = null;
  
          //initializing the fragment object which is selected
          switch (itemId) {
              case R.id.nav_menu1:
                  fragment = new Menu1();
                  break;
              case R.id.nav_menu2:
                  fragment = new Menu2();
                  break;
              case R.id.nav_menu3:
                  fragment = new Menu3();
                  break;
          }
  
          //replacing the fragment
          if (fragment != null) {
              FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
              ft.replace(R.id.content_frame, fragment);
              ft.commit();
          }
  
          DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
          drawer.closeDrawer(GravityCompat.START);
      }
  
  
      @SuppressWarnings("StatementWithEmptyBody")
      @Override
      public boolean onNavigationItemSelected(MenuItem item) {
  
          //calling the method displayselectedscreen and passing the id of selected menu
          displaySelectedScreen(item.getItemId());
          //make this method blank
          return true;
      }
  
  
  }
  </code></pre>
  
  <p>My menu 1 code where I would want the scanner</p>
  
  <pre><code>package net.simplifiedcoding.navigationdrawerexample;
  
  import android.os.Bundle;
  import android.support.annotation.Nullable;
  import android.support.v4.app.Fragment;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  
  /**
   * Created by Belal on 18/09/16.
   */
  
  
  public class Menu1 extends Fragment {
  
      @Nullable
      @Override
      public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
          //returning our layout file
          //change R.layout.yourlayoutfilename for each of your fragments
          return inflater.inflate(R.layout.fragment_menu_1, container, false);
      }
  
  
      @Override
      public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
          super.onViewCreated(view, savedInstanceState);
          //you can set the title for your toolbar here for different fragments different titles
          getActivity().setTitle("Skanneri");
      }
  }
  </code></pre>
  
  <p>My activity_main_drawer.xml is the following</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  
      &lt;group android:checkableBehavior="single"&gt;
          &lt;item
              android:id="@+id/nav_menu1"
              android:icon="@android:drawable/ic_menu_camera"
              android:title="QR skanneri" /&gt;
          &lt;item
              android:id="@+id/nav_menu2"
              android:icon="@android:drawable/ic_menu_mapmode"
              android:title="Kartta" /&gt;
          &lt;item
              android:id="@+id/nav_menu3"
              android:icon="@android:drawable/ic_menu_help"
              android:title="Tietoa eri aloista" /&gt;
  
      &lt;/group&gt;
  
  &lt;/menu&gt;
  </code></pre>
  
  <p>My fragment_menu_1.xml where I would want the button which scans the qr code is the following</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  
  
  
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:textAppearance="@style/TextAppearance.AppCompat.Button"
          android:text="Paina nappia skannataksesi QR-koodin"
          android:id="@+id/textView"
          android:layout_marginTop="27dp"
          android:layout_alignParentTop="true"
          android:layout_centerHorizontal="true" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p><strong>EDIT!!!!</strong>
  my build.gradle file has the following</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 24
      buildToolsVersion "24.0.2"
  
      defaultConfig {
          applicationId "net.simplifiedcoding.navigationdrawerexample"
          minSdkVersion 16
          targetSdkVersion 24
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:24.2.0'
      compile 'com.android.support:design:24.2.0'
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:support-v13:23.0.1'
      compile 'com.google.zxing:core:3.2.0' //QRCode scanner
      compile 'com.facebook.rebound:rebound:0.3.8' //spring animation
  
  
  }
  </code></pre>
  
  <p>I really need help, thanks!</p>