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



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