Friday, January 25, 2013

Working With Menu: Creating Context Menu In Android

The Android Development Tutorials blog contains Basic as well as Advanced android tutorials.Go to Android Development Tutorials to get list of all Android Tutorials.


Context Menu 

A context menu provides actions that affect a specific item or context frame in the UI.
Context Menu appears when user long press on a View like ListView, GridView etc.

Learn  Creating Option Menu In Android
Android Custom Alert Dialog Example 

For Ex:  Below Is Context menu  registerd with List View
When A User long Press on a contacts he/she gets two option Call and SMS through Context Menu.





Some More Good  Android Topics
Customizing Toast In Android 
 Showing Toast for Longer Time
Customizing Checkboxes In Android  
Customizing Progress Bar  
To learn Basic of Android Animation  go to  Android Animation Basics



Creating a  context menu

To create a context menu:
  1. Register the View to which the context menu should be associated by calling registerForContextMenu() and pass it the View. Here we have used Context Menu with ListView

  2. Implement the onCreateContextMenu() method in your Activity When the registered view receives a long-click event, the system calls your onCreateContextMenu()method. This is where you define the menu items, usually by inflating a menu resource.

1:  Registering The View(here List View)  for Context menu.


We have to register the ListView for ContextMenu in onCreate  method


@Override
            public void onCreate(Bundle savedInstanceState)
            {
                    super.onCreate(savedInstanceState);
                    setContentView(R.layout.show_contacts);

              
                    listViewSmartContacts=(ListView)findViewById(R.id.listSmartContacts);                    
                    contactListAdapter=new ContactListAdapter(this);
                    listViewSmartContacts.setAdapter(contactListAdapter);

       
                    // Register the ListView  for Context menu
                    registerForContextMenu(listViewSmartContacts);
       }

2: Implement the onCreateContextMenu()


When the registered view receives a long-click event, the system calls your onCreateContextMenu() method. 

             @Override
            public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
            {
                    super.onCreateContextMenu(menu, v, menuInfo);
                    menu.setHeaderTitle("Select The Action"); 
                    menu.add(0, v.getId(), 0, "Call"); 
                    menu.add(0, v.getId(), 0, "Send SMS");
    
            } 


MenuInflater allows you to inflate the context menu from a menu resource 

3: Implement onContextItemSelected method



When the user selects a menu item, the system calls this method so you can perform the appropriate action.


             @Override 
            public boolean onContextItemSelected(MenuItem item)
            { 


                        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
                       
                // 
info.position will give the index of selected item
                           intIndexSelected=info.position              
                                if(item.getTitle()=="Call")
                                {
                
                                   // Code to execute when clicked on This Item

                                } 
                                else if(item.getTitle()=="Send SMS")
                                {
                                   

                                  // Code to execute when clicked on This Item                                                        } 
                                else
                                {

                                    return false;
                                } 
                                return true; 
                       
                                   

              } 
             



The Completye Code:


package com.mtracker;

import com.mtracker.R;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.LinearLayout;
import android.widget.ListView;


public class ShowSmartContactsActivity extends Activity
{
  
      
            ListView listViewSmartContacts;
            ContactListAdapter  contactListAdapter;
            //ArrayList<String> numberList;
           
            String number;
           
            public ShowSmartContactsActivity()
            {
                /// numberList=new ArrayList<String>();
           
            }
            @Override
            public void onCreate(Bundle savedInstanceState)
            {
                    super.onCreate(savedInstanceState);
                    setContentView(R.layout.show_contacts);
       
                   
                    LinearLayout layoutContacts=(LinearLayout)findViewById(R.id.layoutSmartContacts);
                    int APILevel=android.os.Build.VERSION.SDK_INT ;
                    if(APILevel>=14)
                    {
                        layoutContacts.setBackgroundResource(R.color.Default);
                    }
                   
                    listViewSmartContacts=(ListView)findViewById(R.id.listSmartContacts);
                    //getList();
                    contactListAdapter=new ContactListAdapter(this);
                    listViewSmartContacts.setAdapter(contactListAdapter);
      
                                      
                   
                    registerForContextMenu(listViewSmartContacts);
            }
           
           
           
           
           
   
           
      
      
           
               
   
            @Override
            public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
            {
                    super.onCreateContextMenu(menu, v, menuInfo);
                    menu.setHeaderTitle("Select The Action"); 
                    menu.add(0, v.getId(), 0, "Call"); 
                    menu.add(0, v.getId(), 0, "Send SMS");
    
            }

            @Override 
            public boolean onContextItemSelected(MenuItem item)
            { 


                        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
                        String number;
              
                        try
                        {
                                number=new ContactListAdapter(this).numberList.get(info.position);
                
               
                
                                if(item.getTitle()=="Call")
                                {
                
                
                                        Intent callIntent = new Intent(Intent.ACTION_CALL);
                                        callIntent.setData(Uri.parse("tel:"+number));
                                        startActivity(callIntent);
                
                
                
        

                                } 
                                else if(item.getTitle()=="Send SMS")
                                {
                                        Intent smsIntent = new Intent(Intent.ACTION_VIEW);
                                        smsIntent.setType("vnd.android-dir/mms-sms");
                                        smsIntent.putExtra("address", number);
                                        startActivity(smsIntent);
                    

                                } 
                                else
                                {return false;} 
                                return true; 
                        }
                        catch(Exception e)
                        {
                                return true;
                        }
            } 
           
           
    
}





 

New Advance Topics:
Android ImageSwitcher                    Android TextSwitcher                                Android ViewFlipper
Android Gesture Detector               Handling/Detecting Swap Events                Gradient Drawable
Detecting Missed Calls                    Hide Title Bar                                           GridView Animation

 Beginning With Android
      Android : Introduction                                                              Configuring Eclipse for Android Development
     Creating Your First Android Project                                           Understanding Android Manifest File of your android app

 Advance Android Topics                                                              Customizing Android Views


Working With Layouts                                                                Working With Views

Understanding Layouts in Android                                                   Using Buttons and EditText in Android
Working with Linear Layout (With Example)                                     Using CheckBoxes in Android
Nested Linear Layout (With Example)                                              Using AutoCompleteTextView in Android                                                                                          Grid View
Relative Layout In Android                                                               ListView
Table Layout                                                                                   Android ProgressBar
Frame Layout(With Example)                                                          Customizing ProgressBar
Absolute Layout                                                                             Customizing Radio Buttons
Grid Layout                                                                                    Customizing Checkboxes In Android

Android Components                                                                 Dialogs In Android

Activity In Android                                                                    Working With Alert Dialog
Activity Life Cycle                                                                    Adding Radio Buttons In Dialog
Starting Activity For Result                                                       Adding Check Boxes In Dialog
Sending Data from One Activity to Other in Android                    Creating Customized Dialogs in Android
Returning Result from Activity                                                   Creating Dialog To Collect User Input
Android : Service                                                                     DatePicker and TimePickerDialog
BroadcastReceiver                                                                   Using TimePickerDialog and DatePickerDialog In android

Menus In Android                                                                ListView:
Creating Option Menu                                                               Populating ListView With DataBase
Creating Context Menu In Android                                              Populating ListView with ArrayList
                                                                                               ListView with Custom Adapter

Toast                                                                                      Working With SMS
Customizing Toast In Android                                                       How to Send SMS in Android
Customizing the Display Time of Toast                                        How To Receive SMS
Customizing Toast At Runtime                                                  Accessing Inbox In Android
Adding Image in Toast
Showing Toast for Longer Time


TelephonyManager                                                            Storage: Storing Data In Android
Using Telephony Manager In Android                                          SharedPreferences In Android
                                                                                              Reading and Writing files to Internal Stoarage
Working With Incoming Calls                                             DataBase
How To Handle Incoming Calls in Android                                Working With Database in Android
How to Forward an Incoming Call In Android                            Creating Table In Android
CALL States In Android                                                          Inserting, Deleting and Updating Records In Table in Android


Miscellaneous
Notifications In Android
How To Vibrate The Android Phone
Sending Email In Android
Opening a webpage In Browser
How to Access PhoneBook In Android
Prompt User Input with an AlertDialog



3 comments:

  1. i am not able to see setOnItemlongclick() event trigger code in the code..please let me know

    ReplyDelete
  2. Thank u very much....... Good Work....... Helped me a lot...... !

    ReplyDelete