Working With Menu: Creating Option Menu

Option Menu:
Option Menu is a drop down menu containing   options, and appears when a users clicks on Menu button.
For Ex:
 

                                              

We can create an Option Menu with following :

1. Create a menu xml
2. Register the menu in Activity
3. Write code to Handle the Clicks on menu items

1: Create xml for menu

     Create a new folder named "Menu" in res folder
     inside this  Menu folder create .xml    file

here I have created option.xml   xml for the option menu in  above  Image

           <?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
   
     <item android:id="@+id/ChangeColor"
          android:icon="@drawable/setting"
          android:title="Settings"
          />
    <item android:id="@+id/phoneInformation"
          android:icon="@drawable/phone"
          android:title="My Phone Information" />
   
    <item android:id="@+id/callInfo"
          android:icon="@drawable/callinfo"
          android:title="In and Out Call Info" />

   
    <item android:id="@+id/email"
          android:icon="@drawable/mail"
          android:title="Mail to Developer" />
   
 </menu>

android:id

A resource ID that's unique to the item, which allows the application can recognize the item when the user selects it.

android:icon

An image  to use as the item's icon.

android:title

A tittle to show.

2: Register In Activity

Override onCreateOptionMenu   method and inflate the .xml (here options.xml) inside method

            @Override
                     public boolean onCreateOptionsMenu(Menu menu) {
                            MenuInflater inflater = getMenuInflater();
                            inflater.inflate(R.menu.options, menu);
                            return true;
                     }

3: Handle Click Events

When the user selects an item from the options menu (including action items in the action bar), the system calls your activity's onOptionsItemSelected() method. This method passes the MenuItem selected. You can identify the item by calling getItemId(), which returns the unique ID for the menu item (defined by the android:id attribute in the menu resource

 To Handle click events override  onOptionsItemSelected  method


                               @Override
                     public boolean onOptionsItemSelected(MenuItem item) {
                         // Handle item selection
                        
                      
                         switch (item.getItemId()) {
                             case R.id.ChangeColor:
                                                              // write code to execute when clicked on this option
                                                                return true;   

                             case R.id.phoneInformation:
                                                             // write code to execute when clicked on this option
                                                             return true;
                            
                              case R.id.callInfo:
                                                              // write code to execute when clicked on this option
                                                             return true;
                                
                             case R.id.email:
                                                            // write code to execute when clicked on this option
                                                              return true;
                                
                               default:
                                                   return super.onOptionsItemSelected(item);
                         }
                     }

Advance Android Topics

                   Customizing Toast In Android 
                   Showing Toast for Longer Time
                   Customizing the Display Time of Toast
                   Using TimePickerDialog and DatePickerDialog In android
                   Animating A Button In Android
                    Populating ListView With DataBase

                    Customizing Checkboxes In Android 
                    Increasin Size of Checkboxes
                    Android ProgressBar
                    Designing For Different Screen Sizes
                    Handling Keyboard Events

 More Android Topics

Android : Introduction

       Eclipse Setup for Android Development

                     Configuring Eclipse for Android Development

          Begging With Android

                     Creating Your First Android Project
                     Understanding Android Manifest File of your android app

         Working With Layouts

                      Understanding Layouts in Android
                          Working with Linear Layout (With Example)
                                Nested Linear Layout (With Example)
                          Table Layout
                          Frame Layout(With Example)
                         Absolute Layout
                         Grid Layout

       Activity

                     Activity In Android
                     Activity Life Cycle
                     Starting Activity For Result
                     Sending Data from One Activity to Other in Android
                     Returning Result from Activity

     Working With Views

                     Using Buttons and EditText in Android 
                     Using CheckBoxes in Android 
                     Using AutoCompleteTextView in Android
                     Grid View

       Toast

                     Customizing Toast In Android
                     Customizing the Display Time of Toast
                     Customizing Toast At Runtime
                     Adding Image in Toast
                     Showing Toast for Longer Time

     Dialogs In Android

                     Working With Alert Dialog
                     Adding Radio Buttons In Dialog
                     Adding Check Boxes In Dialog
                     Creating Customized Dialogs in Android
                    Adding EditText in Dialog

                   Creating Dialog To Collect User Input

                 DatePicker and TimePickerDialog

                              Using TimePickerDialog and DatePickerDialog In android

    Working With SMS

                  How to Send SMS in Android
                  How To Receive SMS
                  Accessing Inbox In Android

    ListView:

               Populating ListView With DataBase

      Menus In Android

                    Creating Option Menu
                    Creating Context Menu In Android

      TelephonyManager

                    Using Telephony Manager In Android

     Working With Incoming Calls

                    How To Handle Incoming Calls in Android
                    How to Forward an Incoming Call In Android
                   CALL States 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

   Storage:  Storing Data In Android

               Shared Prefferences  In Android

                             SharedPreferences In Android

               Files: File Handling In Android

                              Reading and Writing files to Internal Stoarage
                              Reading and Writing files to SD Card 
                           

                DataBase : Working With Database

                             Working With Database in Android
                             Creating Table In Android
                             Inserting, Deleting and Updating Records In Table in Android
                             How to Create DataBase in Android
                             Accessing Inbox In Android

     Animation In Android:

                  Animating A Button In Android




                    

How to Forward an Incoming Call In Android

In Android an Incoming Call can be forwarded to any Mobile Number

Here  phoneNumberToForward  is the Nobile Number to whom Incoming Call To be Forwarded

Set Call Forwarding

String url = "tel:"+"**21*"+ phoneNumberToForward+Uri.encode("#");
              Intent intent1 = (new Intent(Intent.ACTION_CALL, Uri.parse(url)));
              intent1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
              startActivity(intent1);

Reset Call Forwarding

To Cancel/Reset the Call forwarding

String url = "tel:"+"##21#"+ phoneNumberToForward+Uri.encode("#");
               Intent intent1 = (new Intent(Intent.ACTION_CALL, Uri.parse(url)));
               intent1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
               startActivity(intent1);

DatePicker and TimePicker Dialog in Android

We can use Time Picker  and Date Picker   widget to select a time and date , but TimePickerDialog and DatePickerDialog  is a better choice to do that.

In this post I will discuss how to use DatePickerDialog and TimePickerDialog to select Date and Time.

                      





Here I have described briefly, the Example with full source code is given below after this.
 
Declare following Variables in your Activity/Class

static final int DATE_DIALOG_ID = 0;
static final int TIME_DIALOG_ID=1;

// variables to save user selected date and time
public  int yearSelected,monthSelected,daySelected,hourSelected,minuteSelected;
  
// declare  the variables to show the date and time whenTime and Date Picker Dialog first appears
private int mYear, mMonth, mDay,mHour,mMinute; 

In the constructor you can initiallise the variable to current date and time.

                
                    final Calendar c = Calendar.getInstance();
                    mYear = c.get(Calendar.YEAR);
                    mMonth = c.get(Calendar.MONTH);
                    mDay = c.get(Calendar.DAY_OF_MONTH);
                    mHour = c.get(Calendar.HOUR_OF_DAY);
                    mMinute = c.get(Calendar.MINUTE);


//call the method when you need to show DatePickerDialog
 showDialog(DATE_DIALOG_ID);
//call the method when you need to show DatePickerDialog
  showDialog(TIME_DIALOG_ID);

// Register  DatePickerDialog listener
 private DatePickerDialog.OnDateSetListener mDateSetListener =
                        new DatePickerDialog.OnDateSetListener() {                 // the callback received when the user "sets" the Date in the DatePickerDialog
                            public void onDateSet(DatePicker view, int yearSelected,
                                                  int monthOfYear, int dayOfMonth) {
                               yearSelected = yearSelected;
                               monthSelected = monthOfYear;
                               daySelected = dayOfMonth;
                              Toast.makeText(getApplicationContext(), "Date selected is:"+daySelected+"-"+monthSelected+"-"+yearSelected, Toast.LENGTH_LONG).show();
                                                         }
                        };

   // Register  TimePickerDialog listener                 
                        private TimePickerDialog.OnTimeSetListener mTimeSetListener =
                            new TimePickerDialog.OnTimeSetListener() {
             // the callback received when the user "sets" the TimePickerDialog in the dialog
                                public void onTimeSet(TimePicker view, int hourOfDay, int min) {
                                    hourSelected = hourOfDay;
                                    minuteSelected = min;
                                   Toast.makeText(getApplicationContext(), "Time selected is:"+hourSelected+"-"+minuteSelected, Toast.LENGTH_LONG).show();
                                                                  }
                            };


// Method automatically gets Called when you call showDialog()  method
                        @Override
                        protected Dialog onCreateDialog(int id) {
                            switch (id) {
                            case DATE_DIALOG_ID:
                                return new DatePickerDialog(this,
                                            mDateSetListener,
                                            mYear, mMonth, mDay);
                            case TIME_DIALOG_ID:
                                return new TimePickerDialog(this,
                                        mTimeSetListener, mHour, mMinute, false);
                           
                            }
                            return null;
                        }
                        

Date And Time Picker Dialog Example with Full Source Code

In the example   I have 2 buttons  
1: Select Date - to show DatePickerDialog 
2: Select Time - to show TimePickertDialog
When user selects a Date and Time in respective Dialogs we will set the selected date and time in Respective buttons. We will set selected date in Select Date Button and selected time in Select Time Button(See the last Snapshot)


main.xml

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


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:textSize="25dp"
        android:layout_gravity="center_horizontal"
        android:text="Date And Time Picker Example" />

    <Button
        android:id="@+id/buttonSelectDate"
        android:layout_marginTop="20dp"
        android:textSize="25dp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Select Date" />

    <Button
        android:id="@+id/buttonSelectTime"
        android:layout_marginTop="20dp"
        android:textSize="25dp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Select Time" />

</LinearLayout>



DateAndTimePickerActivity.java

public class DateAndTimePickerActivity extends Activity
{

            Button btnSelectDate,btnSelectTime;
           
            static final int DATE_DIALOG_ID = 0;
            static final int TIME_DIALOG_ID=1;
           
                // variables to save user selected date and time
            public  int year,month,day,hour,minute;  
 // declare  the variables to Show/Set the date and time when Time and  Date Picker Dialog first appears
            private int mYear, mMonth, mDay,mHour,mMinute;
           
            // constructor
           
            public DateAndTimePickerActivity()
            {
                        // Assign current Date and Time Values to Variables
                        final Calendar c = Calendar.getInstance();
                        mYear = c.get(Calendar.YEAR);
                        mMonth = c.get(Calendar.MONTH);
                        mDay = c.get(Calendar.DAY_OF_MONTH);
                        mHour = c.get(Calendar.HOUR_OF_DAY);
                        mMinute = c.get(Calendar.MINUTE);
            }
           
            @Override
            protected void onCreate(Bundle savedInstanceState)
            {
                        super.onCreate(savedInstanceState);
                        setContentView(R.layout.date_and_time_picker);
                       
                        // get the references of buttons
                        btnSelectDate=(Button)findViewById(R.id.buttonSelectDate);
                        btnSelectTime=(Button)findViewById(R.id.buttonSelectTime);
                       
                        // Set ClickListener on btnSelectDate
                        btnSelectDate.setOnClickListener(new View.OnClickListener() {
                           
                            public void onClick(View v) {
                                // Show the DatePickerDialog
                                 showDialog(DATE_DIALOG_ID);
                            }
                        });
                       
                        // Set ClickListener on btnSelectTime
                        btnSelectTime.setOnClickListener(new View.OnClickListener() {
                           
                            public void onClick(View v) {
                                // Show the TimePickerDialog
                                 showDialog(TIME_DIALOG_ID);
                            }
                        });
                       
            }
           
           
            // Register  DatePickerDialog listener
             private DatePickerDialog.OnDateSetListener mDateSetListener =
                                    new DatePickerDialog.OnDateSetListener() {
                                // the callback received when the user "sets" the Date in the DatePickerDialog
                                        public void onDateSet(DatePicker view, int yearSelected,
                                                              int monthOfYear, int dayOfMonth) {
                                           year = yearSelected;
                                           month = monthOfYear;
                                           day = dayOfMonth;
                                           // Set the Selected Date in Select date Button
                                           btnSelectDate.setText("Date selected : "+day+"-"+month+"-"+year);
                                        }
                                    };

               // Register  TimePickerDialog listener                
                                    private TimePickerDialog.OnTimeSetListener mTimeSetListener =
                                        new TimePickerDialog.OnTimeSetListener() {
                                 // the callback received when the user "sets" the TimePickerDialog in the dialog
                                            public void onTimeSet(TimePicker view, int hourOfDay, int min) {
                                                hour = hourOfDay;
                                                minute = min;
                                                // Set the Selected Date in Select date Button
                                                btnSelectTime.setText("Time selected :"+hour+"-"+minute);
                                              }
                                        };


            // Method automatically gets Called when you call showDialog()  method
                                    @Override
                                    protected Dialog onCreateDialog(int id) {
                                        switch (id) {
                                        case DATE_DIALOG_ID:
                                 // create a new DatePickerDialog with values you want to show
                                            return new DatePickerDialog(this,
                                                        mDateSetListener,
                                                        mYear, mMonth, mDay);
                                // create a new TimePickerDialog with values you want to show
                                        case TIME_DIALOG_ID:
                                            return new TimePickerDialog(this,
                                                    mTimeSetListener, mHour, mMinute, false);
                                      
                                        }
                                        return null;
                                    }
                                    
}

   


Advance Android Topics

                   Customizing Toast In Android 
                   Showing Toast for Longer Time
                   Customizing the Display Time of Toast
                   Using TimePickerDialog and DatePickerDialog In android
                   Animating A Button In Android
                    Populating ListView With DataBase

                    Customizing Checkboxes In Android 
                    Increasin Size of Checkboxes
                    Android ProgressBar
                    Designing For Different Screen Sizes
                    Handling Keyboard Events 

More Android Topics:

Android : Introduction

       Eclipse Setup for Android Development

                     Configuring Eclipse for Android Development

          Begging With Android

                     Creating Your First Android Project
                     Understanding Android Manifest File of your android app

         Working With Layouts

                      Understanding Layouts in Android
                          Working with Linear Layout (With Example)
                                Nested Linear Layout (With Example)
                          Table Layout
                          Frame Layout(With Example)
                         Absolute Layout
                         Grid Layout

       Activity

                     Activity In Android
                     Activity Life Cycle
                     Starting Activity For Result
                     Sending Data from One Activity to Other in Android
                     Returning Result from Activity

     Working With Views

                     Using Buttons and EditText in Android 
                     Using CheckBoxes in Android 
                     Using AutoCompleteTextView in Android
                     Grid View

       Toast

                     Customizing Toast In Android
                     Customizing the Display Time of Toast
                     Customizing Toast At Runtime
                     Adding Image in Toast
                     Showing Toast for Longer Time

     Dialogs In Android

                     Working With Alert Dialog
                     Adding Radio Buttons In Dialog
                     Adding Check Boxes In Dialog
                     Creating Customized Dialogs in Android
                    Adding EditText in Dialog

                   Creating Dialog To Collect User Input

                 DatePicker and TimePickerDialog

                              Using TimePickerDialog and DatePickerDialog In android

    Working With SMS

                  How to Send SMS in Android
                  How To Receive SMS
                  Accessing Inbox In Android

    ListView:

               Populating ListView With DataBase

      Menus In Android

                    Creating Option Menu
                    Creating Context Menu In Android

      TelephonyManager

                    Using Telephony Manager In Android

     Working With Incoming Calls

                    How To Handle Incoming Calls in Android
                    How to Forward an Incoming Call In Android
                   CALL States 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

   Storage:  Storing Data In Android

               Shared Prefferences  In Android

                             SharedPreferences In Android

               Files: File Handling In Android

                              Reading and Writing files to Internal Stoarage
                              Reading and Writing files to SD Card 
                           

                DataBase : Working With Database

                             Working With Database in Android
                             Creating Table In Android
                             Inserting, Deleting and Updating Records In Table in Android
                             How to Create DataBase in Android
                             Accessing Inbox In Android

     Animation In Android:

                  Animating A Button In Android

Creating Customized Dialogs in Android

We can create a dialog with Edittext   and other views like Button, CheckBoxes, RadioButtons etc.

For this we need to Create A xml layout and and  inflate it in AlertDialog

                               

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
   
   
    <EditText
        android:id="@+id/editTextKeywordsToBlock"
        android:hint="Enter 1 or more keywords. Use space berween two keywords"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <requestFocus />
    </EditText>

    <LinearLayout
                 
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
           
            android:layout_marginTop="10dp">
                 

     <Button
         android:id="@+id/buttonBlockByKeyword"
         android:layout_marginTop="15dp"
         android:layout_weight="1"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="SAVE"
         />
    
      <Button
         android:id="@+id/buttonCancelBlockKeyword"
         android:layout_marginTop="15dp"
         android:layout_weight="1"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="Cancel"
         />
   
     </LinearLayout>
   

</LinearLayout>

And inflate this Layout at run time    like following

final Dialog dialog = new Dialog(this);

                    dialog.setContentView(R.layout.block_by_keyword);
                    dialog.setTitle("Keyword To Block");

                    final EditText editTextKeywordToBlock=(EditText)dialog.findViewById(R.id.editTextKeywordsToBlock);
                    Button btnBlock=(Button)dialog.findViewById(R.id.buttonBlockByKeyword);
                    Button btnCancel=(Button)dialog.findViewById(R.id.buttonCancelBlockKeyword);
                    dialog.show();

Adding Check Boxes In Alert Dialog

We can also add check boxes in Alert Dialog and we can check multiple, it is used when we want mutiple option to be selected.

Handling the Click Events on CheckBoxes:

when a Checkbox is clocked means it is checked or unchecked obClick() method is called and the index of the selected item is passed, we can use this index to get the item which is checked

Create an Object of AlertDialog

AlertDialog dialog; 

//following code will be in your activity.java file

final CharSequence[] items = {" Easy "," Medium "," Hard "," Very Hard "};
                // arraylist to keep the selected items
                final ArrayList seletedItems=new ArrayList();
              
                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("Select The Difficulty Level");
                builder.setMultiChoiceItems(items, null,
                        new DialogInterface.OnMultiChoiceClickListener() {
                 // indexSelected contains the index of item (of which checkbox checked)
                 @Override
                 public void onClick(DialogInterface dialog, int indexSelected,
                         boolean isChecked) {
                     if (isChecked) {
                         // If the user checked the item, add it to the selected items
                         // write your code when user checked the checkbox
                         seletedItems.add(indexSelected);
                     } else if (seletedItems.contains(indexSelected)) {
                         // Else, if the item is already in the array, remove it 
                         // write your code when user Uchecked the checkbox
                         seletedItems.remove(Integer.valueOf(indexSelected));
                     }
                 }
             })
              // Set the action buttons
             .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int id) {
                     //  Your code when user clicked on OK
                     //  You can write the code  to save the selected item here
                   
                 }
             })
             .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int id) {
                    //  Your code when user clicked on Cancel
                  
                 }
             });
      
                dialog = builder.create();//AlertDialog dialog; create like this outside onClick
                dialog.show();
        }