Saturday, 29 November 2014

Simple RecyclerView example in Android

Hi guys, It's been a longtime, herewith I came up with a RecyclerView example, I hope you enjoy this blog too.

 RecyclerView is just an advance for ListView. Hereafter you can use RecyclerView instead of ListView. RecyclerView can do all works performed by ListView. And also RecyclerView is more flexible with large data set. In this blog you can learn how to create a simple RecyclerView and also adapter for this RecyclerView. You can create RecyclerView by using appcompat-v7 support jar.

Code:

MainActivity.java

import android.support.annotation.Nullable;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.List;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.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);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        RecyclerViewAdapter adapter;
        RecyclerView recyclerView;
        private static List<Model> demoData;

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            return inflater.inflate(R.layout.fragment_main, container, false);
        }

        @Override
        public void onActivityCreated(@Nullable Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
            recyclerView = (RecyclerView) getView().findViewById(R.id.myList);
            recyclerView.setHasFixedSize(true);
            LinearLayoutManager llm = new LinearLayoutManager(getActivity());
            llm.setOrientation(LinearLayoutManager.VERTICAL);
            recyclerView.setLayoutManager(llm);

            demoData = new ArrayList<Model>();
            char c = 'A';
            for (byte i = 0; i < 20; i++) {
                Model model = new Model();
                model.name = c++;
                model.age = (byte) (20 + i);
                demoData.add(model);
            }
            adapter = new RecyclerViewAdapter(demoData);
            recyclerView.setAdapter(adapter);
        }
    }
}


RecyclerViewAdapter.java


import android.support.v7.widget.RecyclerView;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

public class RecyclerViewAdapter
        extends RecyclerView.Adapter
        <RecyclerViewAdapter.ListItemViewHolder> {

    private List<Model> items;
    private SparseBooleanArray selectedItems;

    RecyclerViewAdapter(List<Model> modelData) {
        if (modelData == null) {
            throw new IllegalArgumentException("modelData must not be null");
        }
        items = modelData;
        selectedItems = new SparseBooleanArray();
    }

    @Override
    public ListItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        View itemView = LayoutInflater.
                from(viewGroup.getContext()).
                inflate(R.layout.item_demo_01, viewGroup, false);
        return new ListItemViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(ListItemViewHolder viewHolder, int position) {
        Model model = items.get(position);
        viewHolder.name.setText(String.valueOf(model.name));
        viewHolder.age.setText(String.valueOf(model.age));
        viewHolder.itemView.setActivated(selectedItems.get(position, false));
    }

    @Override
    public int getItemCount() {
        return items.size();
    }

    public final static class ListItemViewHolder extends RecyclerView.ViewHolder {
        TextView name;
        TextView age;

        public ListItemViewHolder(View itemView) {
            super(itemView);
            name = (TextView) itemView.findViewById(R.id.txt_name);
            age = (TextView) itemView.findViewById(R.id.txt_age);
        }
    }
}

And your
fragment_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MyActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/myList"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>


Screen shot of this example



I hope this post is useful. kindly share your feedback as comment here.



Simple RecyclerView example with filter option in Android

Simple recyclerview example with checkbox in Android

Dynamically change ListView to GridView and Vice Versa using RecyclerView

Source code on GitHub



Thank You



Monday, 19 May 2014

Simple Navigation Drawer example in android

Consider using simple NavigationView instead of this old Navigation drawer, which based on Material design and much simpler and very flexible than this Navigation drawer.

This NavigationDrawer example is developed by using appcompat library project in eclipse kepler.

Code:

MainActivity.java

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.FragmentManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.widget.DrawerLayout;

public class MainActivity extends ActionBarActivity implements
  NavigationDrawerFragment.NavigationDrawerCallbacks {

 /**
  * Fragment managing the behaviors, interactions and presentation of the
  * navigation drawer.
  */
 private NavigationDrawerFragment mNavigationDrawerFragment;

 /**
  * Used to store the last screen title. For use in
  * {@link #restoreActionBar()}.
  */
 private CharSequence mTitle;

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

  mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager()
    .findFragmentById(R.id.navigation_drawer);
  mTitle = getTitle();

  // Set up the drawer.
  mNavigationDrawerFragment.setUp(R.id.navigation_drawer,
    (DrawerLayout) findViewById(R.id.drawer_layout));
 }

 @Override
 public void onNavigationDrawerItemSelected(int position) {
  // update the main content by replacing fragments
  FragmentManager fragmentManager = getSupportFragmentManager();
  if (position == 0) {
   fragmentManager.beginTransaction()
     .replace(R.id.container, HomeFragment.newInstance())
     .commit();
  } else if (position == 1) {
   fragmentManager.beginTransaction()
     .replace(R.id.container, MailFragment.newInstance())
     .commit();
  } else if (position == 2) {
   fragmentManager.beginTransaction()
     .replace(R.id.container, SettingsFragment.newInstance())
     .commit();
  }
 }

 //Get the title of current fragment
 public void onSectionAttached(int number) {
  System.out.println(mTitle);
  switch (number) {
  case 1:
   mTitle = getString(R.string.title_section1);
   break;
  case 2:
   mTitle = getString(R.string.title_section2);
   break;
  case 3:
   mTitle = getString(R.string.title_section3);
   break;
  }
 }

 //Change the title of page to current fragments title
 public void restoreActionBar() {
  ActionBar actionBar = getSupportActionBar();
  actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
  actionBar.setDisplayShowTitleEnabled(true);
  actionBar.setTitle(mTitle);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  if (!mNavigationDrawerFragment.isDrawerOpen()) {
   // Only show items in the action bar relevant to this screen
   // if the drawer is not showing. Otherwise, let the drawer
   // decide what to show in the action bar.
   getMenuInflater().inflate(R.menu.main, menu);
   restoreActionBar();
   return true;
  }
  return super.onCreateOptionsMenu(menu);
 }

 @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();
  if (id == R.id.action_settings) {
   return true;
  }
  return super.onOptionsItemSelected(item);
 }
}


Code:

NavigationDrawerFragment.java

import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;

/**
 * Fragment used for managing interactions for and presentation of a navigation
 * drawer. See the  design guidelines for a complete explanation of the behaviors
 * implemented here.
 */
public class NavigationDrawerFragment extends Fragment {

 /**
  * Remember the position of the selected item.
  */
 private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";

 /**
  * Per the design guidelines, you should show the drawer on launch until the
  * user manually expands it. This shared preference tracks this.
  */
 private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";

 /**
  * A pointer to the current callbacks instance (the Activity).
  */
 private NavigationDrawerCallbacks mCallbacks;

 /**
  * Helper component that ties the action bar to the navigation drawer.
  */
 private ActionBarDrawerToggle mDrawerToggle;

 private DrawerLayout mDrawerLayout;
 private ListView mDrawerListView;
 private View mFragmentContainerView;

 private int mCurrentSelectedPosition = 0;
 private boolean mFromSavedInstanceState;
 private boolean mUserLearnedDrawer;
 private MyDrawerAdapter mMyDrawerAdapter;

 private String[] titles;

 private int[] images, selectedposition;

 public NavigationDrawerFragment() {
 }

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  // Read in the flag indicating whether or not the user has demonstrated
  // awareness of the
  // drawer. See PREF_USER_LEARNED_DRAWER for details.
  SharedPreferences sp = PreferenceManager
    .getDefaultSharedPreferences(getActivity());
  mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);

  if (savedInstanceState != null) {
   mCurrentSelectedPosition = savedInstanceState
     .getInt(STATE_SELECTED_POSITION);
   mFromSavedInstanceState = true;
  }

  // Select either the default item (0) or the last selected item.
  selectItem(mCurrentSelectedPosition);
 }

 @Override
 public void onActivityCreated(Bundle savedInstanceState) {
  super.onActivityCreated(savedInstanceState);
  // Indicate that this fragment would like to influence the set of
  // actions in the action bar.
  setHasOptionsMenu(true);
 }

 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
   Bundle savedInstanceState) {
  mDrawerListView = (ListView) inflater.inflate(
    R.layout.fragment_navigation_drawer, container, false);
  mDrawerListView
    .setOnItemClickListener(new AdapterView.OnItemClickListener() {
     @Override
     public void onItemClick(AdapterView<?> parent, View view,
       int position, long id) {
      if (position == 0) {
       images[0] = R.drawable.home_blue;
       images[1] = R.drawable.mail_yellow;
       images[2] = R.drawable.settings_yellow;
      } else if (position == 1) {
       images[0] = R.drawable.home_yellow;
       images[1] = R.drawable.mail_blue;
       images[2] = R.drawable.settings_yellow;
      } else if (position == 2) {
       images[0] = R.drawable.home_yellow;
       images[1] = R.drawable.mail_yellow;
       images[2] = R.drawable.settings_blue;
      }
      selectedposition[0] = position;
      mMyDrawerAdapter.notifyDataSetChanged();
      selectItem(position);
     }
    });

  titles = new String[] { getString(R.string.title_section1),
    getString(R.string.title_section2),
    getString(R.string.title_section3) };
  images = new int[] { R.drawable.home_blue, R.drawable.mail_yellow,
    R.drawable.settings_yellow };
  selectedposition = new int[] { mCurrentSelectedPosition };

  mMyDrawerAdapter = new MyDrawerAdapter(getActivity(), titles, images,
    selectedposition);
  mDrawerListView.setAdapter(mMyDrawerAdapter);
  mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
  return mDrawerListView;
 }

 public boolean isDrawerOpen() {
  return mDrawerLayout != null
    && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
 }

 /**
  * Users of this fragment must call this method to set up the navigation
  * drawer interactions.
  * 
  * @param fragmentId
  *            The android:id of this fragment in its activity's layout.
  * @param drawerLayout
  *            The DrawerLayout containing this fragment's UI.
  */
 public void setUp(int fragmentId, DrawerLayout drawerLayout) {
  mFragmentContainerView = getActivity().findViewById(fragmentId);
  mDrawerLayout = drawerLayout;

  // set a custom shadow that overlays the main content when the drawer
  // opens
  mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
    GravityCompat.START);
  // set up the drawer's list view with items and click listener

  ActionBar actionBar = getActionBar();
  actionBar.setDisplayHomeAsUpEnabled(true);
  actionBar.setHomeButtonEnabled(true);

  // ActionBarDrawerToggle ties together the the proper interactions
  // between the navigation drawer and the action bar app icon.
  mDrawerToggle = new ActionBarDrawerToggle(getActivity(), mDrawerLayout, 
  R.drawable.ic_drawer, 
  R.string.navigation_drawer_open, 
  R.string.navigation_drawer_close 
  ) {
   @Override
   public void onDrawerClosed(View drawerView) {
    super.onDrawerClosed(drawerView);
    if (!isAdded()) {
     return;
    }

    getActivity().supportInvalidateOptionsMenu(); // calls
                // onPrepareOptionsMenu()
   }

   @Override
   public void onDrawerOpened(View drawerView) {
    super.onDrawerOpened(drawerView);
    if (!isAdded()) {
     return;
    }

    if (!mUserLearnedDrawer) {
     // The user manually opened the drawer; store this flag to
     // prevent auto-showing
     // the navigation drawer automatically in the future.
     mUserLearnedDrawer = true;
     SharedPreferences sp = PreferenceManager
       .getDefaultSharedPreferences(getActivity());
     sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true)
       .commit();
    }

    getActivity().supportInvalidateOptionsMenu(); // calls
                // onPrepareOptionsMenu()
   }
  };

  // If the user hasn't 'learned' about the drawer, open it to introduce
  // them to the drawer,
  // per the navigation drawer design guidelines.
  if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
   mDrawerLayout.openDrawer(mFragmentContainerView);
  }

  // Defer code dependent on restoration of previous instance state.
  mDrawerLayout.post(new Runnable() {
   @Override
   public void run() {
    mDrawerToggle.syncState();
   }
  });

  mDrawerLayout.setDrawerListener(mDrawerToggle);
 }

 private void selectItem(int position) {
  mCurrentSelectedPosition = position;
  if (mDrawerListView != null) {
   mDrawerListView.setItemChecked(position, true);
  }
  if (mDrawerLayout != null) {
   mDrawerLayout.closeDrawer(mFragmentContainerView);
  }
  if (mCallbacks != null) {
   mCallbacks.onNavigationDrawerItemSelected(position);
  }
 }

 @Override
 public void onAttach(Activity activity) {
  super.onAttach(activity);
  try {
   mCallbacks = (NavigationDrawerCallbacks) activity;
  } catch (ClassCastException e) {
   throw new ClassCastException(
     "Activity must implement NavigationDrawerCallbacks.");
  }
 }

 @Override
 public void onDetach() {
  super.onDetach();
  mCallbacks = null;
 }

 @Override
 public void onSaveInstanceState(Bundle outState) {
  super.onSaveInstanceState(outState);
  outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
 }

 @Override
 public void onConfigurationChanged(Configuration newConfig) {
  super.onConfigurationChanged(newConfig);
  // Forward the new configuration the drawer toggle component.
  mDrawerToggle.onConfigurationChanged(newConfig);
 }

 @Override
 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
  // If the drawer is open, show the global app actions in the action bar.
  // See also
  // showGlobalContextActionBar, which controls the top-left area of the
  // action bar.
  if (mDrawerLayout != null && isDrawerOpen()) {
   inflater.inflate(R.menu.global, menu);
   showGlobalContextActionBar();
  }
  super.onCreateOptionsMenu(menu, inflater);
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  if (mDrawerToggle.onOptionsItemSelected(item)) {
   return true;
  }

  if (item.getItemId() == R.id.action_example) {
   Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT)
     .show();
   return true;
  }

  return super.onOptionsItemSelected(item);
 }

 /**
  * Per the navigation drawer design guidelines, updates the action bar to
  * show the global app 'context', rather than just what's in the current
  * screen.
  */
 private void showGlobalContextActionBar() {
  ActionBar actionBar = getActionBar();
  actionBar.setDisplayShowTitleEnabled(true);
  actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
  actionBar.setTitle(R.string.app_name);
 }

 private ActionBar getActionBar() {
  return ((ActionBarActivity) getActivity()).getSupportActionBar();
 }

 /**
  * Callbacks interface that all activities using this fragment must
  * implement.
  */
 public static interface NavigationDrawerCallbacks {
  /**
   * Called when an item in the navigation drawer is selected.
   */
  void onNavigationDrawerItemSelected(int position);
 }
}
Creare the custom adapter class for this navigation drawer listview.

Code:

MyDrawerAdapter.java

import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MyDrawerAdapter extends BaseAdapter {

 private Context context;
 private String[] titles;
 private int[] images;
 private LayoutInflater inflater;
 private int[] selectedposition;

 public MyDrawerAdapter(Context context, String[] titles, int[] images,
   int[] selectedposition) {
  // TODO Auto-generated constructor stub
  this.context = context;
  this.titles = titles;
  this.images = images;
  this.inflater = LayoutInflater.from(this.context);
  this.selectedposition = selectedposition;
 }

 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return titles.length;
 }

 @Override
 public Object getItem(int position) {
  // TODO Auto-generated method stub
  return null;
 }

 @Override
 public long getItemId(int position) {
  // TODO Auto-generated method stub
  return 0;
 }

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  // TODO Auto-generated method stub

  ViewHolder mViewHolder;
  if (convertView == null) {
   convertView = inflater.inflate(R.layout.drawer_list, null);
   mViewHolder = new ViewHolder();
   convertView.setTag(mViewHolder);
  } else {
   mViewHolder = (ViewHolder) convertView.getTag();
  }

  mViewHolder.tvTitle = (TextView) convertView
    .findViewById(R.id.textView1);
  mViewHolder.ivIcon = (ImageView) convertView
    .findViewById(R.id.imageView1);

  mViewHolder.tvTitle.setText(titles[position]);
  mViewHolder.ivIcon.setImageResource(images[position]);

  //Highlight the selected list item
  if (position == selectedposition[0]) {
   convertView.setBackgroundColor(Color.WHITE);
   mViewHolder.tvTitle.setTextColor(Color.BLUE);
  } else {
   convertView.setBackgroundColor(Color.TRANSPARENT);
   mViewHolder.tvTitle.setTextColor(Color.WHITE);
  }

  return convertView;
 }

 private class ViewHolder {
  TextView tvTitle;
  ImageView ivIcon;
 }
}
That's all, we have created Navigation Drawer, Now we have to attach Fragment for each item in Drawer, So first our HomeFragment class would be

Code:

HomeFragment.java

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class HomeFragment extends Fragment {

 /**
  * Returns a new instance of this fragment for the given section number.
  */
 public static HomeFragment newInstance() {
  HomeFragment fragment = new HomeFragment();
  return fragment;
 }

 public HomeFragment() {
 }

 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
   Bundle savedInstanceState) {
  View rootView = inflater.inflate(R.layout.fragment_home, container,
    false);
  return rootView;
 }

 @Override
 public void onAttach(Activity activity) {
  super.onAttach(activity);
  ((MainActivity) activity).onSectionAttached(1);
 }

}
Now our MailFragment class would be

Code:

MailFragment.java


import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class MailFragment extends Fragment {

 /**
  * Returns a new instance of this fragment for the given section number.
  */
 public static MailFragment newInstance() {
  MailFragment fragment = new MailFragment();
  return fragment;
 }

 public MailFragment() {
 }

 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
   Bundle savedInstanceState) {
  View rootView = inflater.inflate(R.layout.fragment_mail, container,
    false);
  return rootView;
 }

 @Override
 public void onAttach(Activity activity) {
  super.onAttach(activity);
  ((MainActivity) activity).onSectionAttached(2);
 }

}

And your
activity_main.xml


<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.android.navigationdrawer.MainActivity" >

    <!--  As the main content view, the view below consumes the entire space available using match_parent in both dimensions. -->

    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- android:layout_gravity="start" tells DrawerLayout to treat this as a sliding drawer on the left side for left-to-right          languages and on the right side for right-to-left languages. If you're not building against API 17 or higher, use  android:layout_gravity="left" instead. -->
    <!-- The drawer is given a fixed width in dp and extends the full height of the container. -->

    <fragment
        android:id="@+id/navigation_drawer"
        android:name="com.android.navigationdrawer.NavigationDrawerFragment"
        android:layout_width="@dimen/navigation_drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start" />

</android.support.v4.widget.DrawerLayout>

And your
fragment_navigation_drawer.xml

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#333333"
    android:choiceMode="singleChoice"
    android:divider="@android:color/transparent"
    android:dividerHeight="0dp"
    tools:context="com.android.navigationdrawer.NavigationDrawerFragment" />

And your
drawer_list.xml


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_margin="10dp"
        android:layout_weight=".5"
        android:src="@drawable/home_blue" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_margin="10dp"
        android:layout_marginLeft="5dp"
        android:layout_weight="1.5"
        android:gravity="left|center_vertical"
        android:text="TextView" />

</LinearLayout>

And your
fragment_home.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#0200E4"
    android:gravity="center"
    tools:context="com.android.navigationdrawer.MainActivity$HomeFragment" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="You are in home fragment!"
        android:textColor="#ffffff"
        android:textSize="20sp"
        android:textStyle="bold|italic" />

</LinearLayout>

And your
fragment_mail.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#B70CE8"
    android:gravity="center"
    tools:context="com.android.navigationdrawer.MainActivity$HomeFragment" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="You are in mail fragment!"
        android:textColor="#ffffff"
        android:textSize="20sp"
        android:textStyle="bold|italic" />

</LinearLayout>

And your
fragment_settings.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FF0000"
    android:gravity="center"
    tools:context="com.android.navigationdrawer.MainActivity$HomeFragment" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="You are in settings fragment!"
        android:textColor="#ffffff"
        android:textSize="20sp"
        android:textStyle="bold|italic" />

</LinearLayout>

And your
res/menu/global.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto" >

    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:title="@string/action_settings"
        app:showAsAction="never"/>

</menu>

And your
res/menu/menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="com.android.navigationdrawer.MainActivity" >

    <item
        android:id="@+id/action_example"
        android:title="@string/action_example"
        app:showAsAction="withText|ifRoom"/>
    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:title="@string/action_settings"
        app:showAsAction="never"/>

</menu>
That's all, You can run your code. If you want to customize your ActionBar try the following code.
Create a xml called
res/values/myactionbar.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <!-- the theme applied to the application or activity -->
    <style name="CustomActionBarTheme" parent="@style/Theme.AppCompat">

        <!-- Support library compatibility -->
        <item name="actionBarStyle">@style/MyActionBar</item>
        <item name="actionBarTabTextStyle">@style/MyActionBarTabText</item>
        <item name="actionMenuTextColor">@android:color/white</item>
    </style>

    <!-- ActionBar styles -->
    <style name="MyActionBar" parent="@style/Widget.AppCompat.ActionBar">

        <!-- Support library compatibility -->
        <item name="titleTextStyle">@style/MyActionBarTitleText</item>
        <item name="background">@drawable/actionbar_background</item>
    </style>

    <!-- ActionBar title text -->
    <style name="MyActionBarTitleText" parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title">
        <item name="android:textColor">@android:color/white</item>
        
    </style>

    <!-- ActionBar tabs text -->
    <style name="MyActionBarTabText" parent="@style/Widget.AppCompat.ActionBar.TabText">
        <item name="android:textColor">@android:color/white</item>
        <!-- The textColor property is backward compatible with the Support Library -->
    </style>

</resources>

And your
res/drawable/actionbar_background.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <solid android:color="#333333" />

</shape>


Screen shots of this example




Simple Sliding Menu Example in Android

I hope this post is useful. kindly share your feedback as comment here.


Thank You



Tuesday, 25 February 2014

Checking Internet Connection Availability in Android

Using ConnectivityManager class we can detect Internet connection availability in Android.

Code:

ConnectionDetector.java

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
  
public class ConnectionDetector {
  
    private Context _context;
  
    public ConnectionDetector(Context context){
        this._context = context;
    }
  
    /**
     * Checking for all possible internet providers
     * **/
    public boolean isConnectingToInternet(){
        ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
          if (connectivity != null)
          {
              NetworkInfo[] info = connectivity.getAllNetworkInfo();
              if (info != null)
                  for (int i = 0; i < info.length; i++)
                      if (info[i].getState() == NetworkInfo.State.CONNECTED)
                      {
                          return true;
                      }
  
          }
          return false;
    }
}


MainActivity.java

import android.os.Bundle;
import android.app.Activity;
import android.view.View;

public class MainActivity extends Activity {
 // Connection detector class
 ConnectionDetector cd;
 // flag for Internet connection status
 Boolean isInternetPresent = false;
 // Alert Dialog Manager
 ShowAlert alert = new ShowAlert();

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  cd = new ConnectionDetector(getApplicationContext());
 }

 public void checkavailability(View v) {
  // Check if Internet present
  isInternetPresent = cd.isConnectingToInternet();
  if (!isInternetPresent) {
   // Internet Connection is not present
   alert.showAlertDialog(MainActivity.this,
     "Fail",
     "Internet Connection is NOT Available", false); 
   // stop executing code by return
   return;
  } else {
   // Internet Connection is not present
   alert.showAlertDialog(MainActivity.this,
     "Success",
     "Internet Connection is Available", true);
   // stop executing code by return
   return;
  }
 }
}


ShowAlert.java

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
 
public class ShowAlert {
    /** 
     * Function to display simple Alert Dialog
     * @param context - application context
     * @param title - alert dialog title
     * @param message - alert message
     * @param status - success/failure (used to set icon)
     *               - pass null if you don't want icon
     * */
 public void showAlertDialog(Context context, String title, String message,
            Boolean status) {
//        AlertDialog alertDialog = new AlertDialog.Builder(context).create();
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        // Setting Dialog Title
        builder.setTitle(title);
 
        // Setting Dialog Message
        builder.setMessage(message);
 
        if(status != null)
            // Setting alert dialog icon
         builder.setIcon((status) ? R.drawable.success : R.drawable.fail);
 
        // Setting OK Button
        builder.setNegativeButton("OK", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
            }
        });
 
        // Showing Alert Message
        builder.show();
    }
}

And your
activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:onClick="checkavailability"
        android:text="Check Internet Availability" />

</RelativeLayout>
And don't forget to add these permissions in your Manifest file.
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />


Screen Shots


I hope this post is useful. kindly share your feedback as comment here.


Thank You