JAVA Code to Rename all files in a folder

JAVA Code to Rename all files in a folder

import java.io.*;

public class RenameFileNames 

{

     public static void main(String[] args) 

     {

        String absolutePath = "E:\\Wllpapers\\unbelive";

        File dir = new File(absolutePath);

        File[] filesInDir = dir.listFiles();

        int i = 0;

        for(File file:filesInDir) {

            i++;

            String name = file.getName();

            String newName = "pic" + i + ".jpeg";

            String newPath = absolutePath + "\\" + newName;

            file.renameTo(new File(newPath));

            System.out.println(name + " changed to " + newName);

        }

    }

}

Code to Check Internet Connection in Android 8 and above

 Code to Check Internet Connection in Android 8 and above

public boolean isInternetConnected(Context context) {
      int result = 0; // Returns connection type. 0: none; 1: mobile data; 2: wifi
      ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
         if (cm != null) {
            NetworkCapabilities capabilities = cm.getNetworkCapabilities(cm.getActiveNetwork());
            if (capabilities != null) {
               if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
                  return true;
               } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
                  return true;
               } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) {
                  return true;
               }
            }
         }
      } else {
         if (cm != null) {
            NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            if (activeNetwork != null) {
// connected to the internet
               if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
                  return true;
               } else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
                  return true;
               } else if (activeNetwork.getType() == ConnectivityManager.TYPE_VPN) {
                  return true;
               }
            }
         }
      }
      return false;
   }

Showing Snackbar with action button in Android

Showing Snackbar with  action button in Android 

void showSnackBarWithMessage(String message)
{

    final Snackbar snack = Snackbar.make(yourView, message, 3000);
    snack.getView().setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.colorPrimaryLight));
    snack.setAction("OK", new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            snack.dismiss();
        }
    });

    snack.show();
}

JAVA Code to find distance between two GPS Coordinates

Here is a JAVA Program to find the distance between two GPS Coordinates.

       static double latitude1 = 40.6971494;
       static double latitude2 = 19.0821978;
       static double longitude1 = -74.2598702;
       static double longitude2 = 72.7410985;


 public static void findDistance()
        {

            double lon1 = Math.toRadians(longitude1);
            double lon2 = Math.toRadians(longitude2);
            double  lat1 = Math.toRadians(latitude1);
            double  lat2 = Math.toRadians(latitude2);

 
            double dlon = lon2 - lon1;
            double dlat = lat2 - lat1;
            double a = Math.pow(Math.sin(dlat / 2), 2)
                    + Math.cos(lat1) * Math.cos(lat2)
                    * Math.pow(Math.sin(dlon / 2),2);

            double c = 2 * Math.asin(Math.sqrt(a));

            // Radius of earth in kilometers. Use 3956
            // for miles
            double r = 6371;

            // calculate the result
            double distance = c * r;
       
            System.out.println("Distance in KM : "+ Math.floor(distance));
            System.out.println("Distance in Miles : "+ Math.floor(distance*.621371));
            System.out.println("Distance in Nautical Miles : "+ Math.floor(distance*.539957));

        }

    

JAVA Code to convert Bytes into MB

Here is the JAVA Code to convert bytes in MB upto 1 decimal place.

public void getSizeInMB()
    {
        long sizeinBytes = 200*1024;
                long sizeInKB = sizeinBytes/1024;
                long sizeInMBInt = sizeInKB/1024;
                float sizeInMB = sizeInKB/1024.0f;
                String size = sizeInMB+"";

                int k = size.indexOf('.');
                size = sizeInMBInt+"."+size.charAt(k+1);
   
      System.out.print(size);
    }

JAVA Code to get Date with Month and Time

                                GregorianCalendar  gc=new GregorianCalendar();
    gc.setTimeInMillis(System.currentTimeMillis());

    int day=gc.get(Calendar.DAY_OF_MONTH);
    int month=gc.get(Calendar.MONTH)+1;
    int year=gc.get(Calendar.YEAR);
    int hour = gc.get(Calendar.HOUR_OF_DAY);
                                int minute = gc.get(Calendar.MINUTE);
                         
    String date="Date: "+day+"/"+month+"/"+year+" Time : "+hour+":"+minute;
                               
                                System.out.print(date);

Customizing a Snackbar in Android

In Android we can customize a Snackbar
We can change the Text Color, Action text color, Background color and chnage/add an image



 TextView mainTextView = (TextView) (mSnackBar.getView()).findViewById(android.support.design.R.id.snackbar_text);
            TextView actionTextView = (TextView) (mSnackBar.getView()).findViewById(android.support.design.R.id.snackbar_action);

// change background color
            mSnackBar.getView().setBackgroundColor(Color.WHITE);
            Typeface font = Typeface.createFromAsset(getAssets(), "LatoRegular.ttf");
// Change the Font
            mainTextView.setTypeface(font);
            actionTextView.setTypeface(font);
// Change the colors
            mainTextView.setTextColor(Color.BLACK);
            actionTextView.setTextColor(Color.BLACK);

Snackbar in Android

How to use Snackbar in Android

Snackbar is used to show some information or feedback about an operation.
Toasts can also be used for the same purpose, but Snackbar privides more features and optiona than Toasts.

There are basically 3 parts of Snackbar

View : The view used to make the snackbar
Text : The message, Feedback or Info that you want to shoe
Time : How long the Snackbar is to show.

   There are 3 options for time

LENGTH_INDEFINITE (Show the snackbar until it's either dismissed or another snackbar is shown)
LENGTH_LONG (Show the snackbar for a long period of time)
LENGTH_SHORT (Show the snackbar for a short period of time)

you can see detail aboy Snackbar class and methods here at   Snackbar in Android

How to make a Snackbar

Snackbar.make(view, R.string.text_label, Snackbar.LENGTH_SHORT) .show()
How to add an action to Snackbar

Snackbar.make(view, R.string.text_label, Snackbar.LENGTH_LONG)
    .setAction(R.string.action_text) {
        // Responds to click on the action
    }
    .show()

Positioning a Snackbar

By default, Snackbars will be placed at  the bottom edge of their parent view. However, you can use the setAnchorView method to make a Snackbar appear above a specific view within your layout, e.g. a Button.

Snackbar.make(...)
    .setAnchorView(button)

How to Check GPS Status in Android

How to check GPS/ Location Service is Enabled in Android

In Android, It is very easy to check whether GPS or Location Service are enabled or not.

For this we need to declare Location related permission in Manifest

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

Method to check GPS in ANDROID

public boolean checkGPSGPSEnabled()
{

    LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    boolean isGPSenabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
    Log.i("KAMLESH","Location Enabled "+isGPSenabled);
    return isGPSenabled;
}

How to check Internet Connection in Android

How to check Internet is Connected or not In Android

In Android Internet Connection can be checked by using  ConnectivityManager class.

Note : to use this you need to declare ACCESS_NETWORK_STATE 


Android Manifest

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 



CODE :

boolean isInternetConnected()
{

   ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE );

   NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
   boolean isConncted = activeNetworkInfo != null && activeNetworkInfo.isConnectedOrConnecting();

   return isConncted;
}

Switch Example in Android

Working with Switch in Android

A Switch is a two-state toggle button. A user can select between two options.

Add switch in layout :

<Switch    

android:layout_marginTop="5dp"    

android:id="@+id/switchs"    

android:layout_width="wrap_content"    

android:layout_height="wrap_content"    

android:text="Show System Apps  "    

android:textSize="15dp"    

android:layout_gravity="right"    

android:layout_marginRight="5dp"    

android:textColor="#4d4d4d"/>

in Activity handle the click event

Switch switch = (Switch)findViewById(R.id.switch);

switchShowSystemApps.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

      
        if(isChecked == true)
        {
            // your code
        }
        else        {
           // your code
        }
    }
});

List of Android normal permissions and dangerous permissions in API 23

List of Android permissions normal permissions and dangerous permissions in API 23

From Android API 23, permission has been classified in two categories.

Normal Permissions : To get these permission, just we need to declare them in Manifest File and Android will allow to use these permission.

Dangerous Permission : For these permission, you need to declare then in manifest and also need to explicitly request in Activity, when user clicks on "Allow" then only these permission can be used.

Here we are providing a list of Normal and Dangerous permissions.

Normal Permission

ACCESS_LOCATION_EXTRA_COMMANDS
ACCESS_NETWORK_STATE
ACCESS_NOTIFICATION_POLICY
ACCESS_WIFI_STATE
BLUETOOTH
BLUETOOTH_ADMIN
BROADCAST_STICKY
CHANGE_NETWORK_STATE
CHANGE_WIFI_MULTICAST_STATE
CHANGE_WIFI_STATE
DISABLE_KEYGUARD
EXPAND_STATUS_BAR
GET_PACKAGE_SIZE
INSTALL_SHORTCUT
INTERNET
KILL_BACKGROUND_PROCESSES
MODIFY_AUDIO_SETTINGS
NFC
READ_SYNC_SETTINGS
READ_SYNC_STATS
RECEIVE_BOOT_COMPLETED
REORDER_TASKS
REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
REQUEST_INSTALL_PACKAGES
SET_ALARM
SET_TIME_ZONE
SET_WALLPAPER
SET_WALLPAPER_HINTS
TRANSMIT_IR
UNINSTALL_SHORTCUT
USE_FINGERPRINT
VIBRATE
WAKE_LOCK
WRITE_SYNC_SETTINGS

Dangerous Permissions

READ_CALENDAR
WRITE_CALENDAR
CAMERA
READ_CONTACTS
WRITE_CONTACTS
GET_ACCOUNTS
ACCESS_FINE_LOCATION
ACCESS_COARSE_LOCATION
RECORD_AUDIO
READ_PHONE_STATE
READ_PHONE_NUMBERS 
CALL_PHONE
ANSWER_PHONE_CALLS 
READ_CALL_LOG
WRITE_CALL_LOG
ADD_VOICEMAIL
USE_SIP
PROCESS_OUTGOING_CALLS
BODY_SENSORS
SEND_SMS
RECEIVE_SMS
READ_SMS
RECEIVE_WAP_PUSH
RECEIVE_MMS
READ_EXTERNAL_STORAGE
WRITE_EXTERNAL_STORAGE

How to request permissions in Android API 23 and above.

From Android API 23, we need to request for permission in Activity class and user has "Allow" for permission in order to use the permission.

You need to declare the permission in manifest file and need to request in Activity as well.

In this blog we will request for 2 permissions   "READ_PHONE_STATE" and "ACCESS_FINE_LOCATION"

Declare the permissions in manifest inside application TAG

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>

String permissionsRequired[];

@Overrideprotected void onCreate(Bundle savedInstanceState)
{
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout);

        permissionsRequired = new String[]{ Manifest.permission.ACCESS_FINE_LOCATION, 
        Manifest.permission.READ_PHONE_STATE};

     if (android.os.Build.VERSION.SDK_INT >= 23) {
     if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) != 
        PackageManager.PERMISSION_GRANTED &&
            ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != 
          PackageManager.PERMISSION_GRANTED) {
        showPermissionDialog();
    }

}
void showPermissionDialog()
{
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Need Permission");
    builder.setMessage("This app needs following permission.\n" +
            "1: Location Permission \n" +
            "2: Phone Permission\n\n"+
            "Please click on allow to give permissions.");
            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        @Override        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
            requestForPermissions(permissionsRequired);


        }
    });

    builder.show();
}

// request for permissions
void requestForPermissions(String permissions[])
{
    ActivityCompat.requestPermissions(GPSCoordinatesMainActivity.this, permissions, 1);
}

// handle whether user allowed and denied the permission
@Overridepublic void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
{
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    permissionDeniedCount++;
   
    if (requestCode == 1) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED &&
                grantResults[1] == PackageManager.PERMISSION_GRANTED) {
            //The External Storage Write Permission is granted to you... Continue your left job...            getGPSLocation();
        }  else {
            //Show Information about why you need the permission            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("You denied the required Permission");
            builder.setMessage(""Please click on allow to give permissions.");
            builder.setPositiveButton("Give Permissions", new DialogInterface.OnClickListener() {
                @Override                public void onClick(DialogInterface dialog, int which) {
                    requestForPermissions(permissionsRequired);
                    dialog.cancel();

                }
            });
            builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                @Override                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                    finish();
                }
            });
            builder.show();

        }
    }

}

How to set a custom layout in Alert Dialog In Android

How to set a custom layout in Alert Dialog In Android.

In Android we can set a custom layout in Alert Dialog making it look better.
For this we need to create layout file and inflate this layout file in Alert Dialog.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#004d66">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:orientation="horizontal"
        android:gravity="center_vertical"
        android:background="#00394d"
        android:padding="5dp">


        <TextView
            android:id="@+id/textViewDialogSingleButtonTitle"
            android:layout_width="match_parent"
            android:layout_height="30dp"
            android:textStyle="bold"
            android:paddingLeft="5dp"
            android:paddingRight="5dp"
            android:text="Dilaog Details"
            android:textColor="#ffffff"
            android:gravity="center_vertical"
            android:textSize="18dp" />


    </LinearLayout>


    <TextView
        android:id="@+id/textViewDialogSingleButtonMessage"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:paddingLeft="5dp"
        android:paddingRight="5dp"
        android:text="Dilaog Title"
        android:textColor="#ffffff"
        android:textSize="16dp" />

        <Button
            android:id="@+id/buttonOKDialogSingleButton"
            android:background="@drawable/button_gradient"
            android:layout_marginTop="15dp"
            android:textColor="#FFFFFF"
            android:textSize="18dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="         OK         "
            android:layout_marginBottom="10dp"
            />
    </LinearLayout>

Inflate the layout in Alert Dialog

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
ViewGroup viewGroup = findViewById(android.R.id.content);
View dialog = LayoutInflater.from(this).inflate(R.layout.custom_dialog_single_button, viewGroup, false);
builder.setView(dialog);
final AlertDialog alertDialog = builder.create();

TextView textViewTtile=(TextView) dialog.findViewById(R.id.textViewDialogSingleButtonTitle);
TextView textViewMessage=(TextView) dialog.findViewById(R.id.textViewDialogSingleButtonMessage);
Button btnOK=(Button)dialog.findViewById(R.id.buttonOKDialogSingleButton);

textViewTtile.setText("  Title");
textViewMessage.setText("Dialog Message");

alertDialog.show();

btnOK.setOnClickListener(new View.OnClickListener() {
    @Override    public void onClick(View view) {
        if(alertDialog.isShowing())
            alertDialog.dismiss();
    }
});



Screenshot

How to get the Date with Month Name and Year In Java or Android

How to get the Date with Month Name and Year In Java or Android

In Java And Android we can get proper Date with Month name.
The following method return Date like "2 Jan 2020".
You just need to pass miliSeconds as parameter.

public static String getDateWithMonthName(long miliseconds)
{
         GregorianCalendar gc=new GregorianCalendar();
         gc.setTimeInMillis(miliseconds);

         int day=gc.get(Calendar.DAY_OF_MONTH);
         int month=gc.get(Calendar.MONTH)+1;
         int year=gc.get(Calendar.YEAR);
         String date=day+" "+getMonth(month)+" "+year;
         return date;
}

public static String getMonth(int month)
{
 switch(month)
 {
      case 1:
         return "Jan";
      case 2:
         return "Feb";
      case 3:
         return "Mar";

      case 4:
         return "April";

      case 5:
         return "May";

      case 6:
         return "June";

      case 7:
         return "July";

      case 8:
         return "Aug";

      case 9:
         return "Sep";

      case 10:
         return "Oct";

      case 11:
         return "Nov";

      case 12:
         return "Dec";

   }
 return "";
}

How to open an APP in Google Play Store

How the open an APP in Google Play Store Programatically 

In Android Programming we can open Play Store with a Given App Package Name.
The following method opens Apps' playstore page

void openAppInPlaystore(String appPackageName )
{
    
     
        try {
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
        } catch (android.content.ActivityNotFoundException anfe) {
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
        }
    
}

How to get All Apps List Installed in Phone

How to get All Apps Icon, Package Name, App Name and Size.

In our Android phone there are 2 types of Apps

1 : System Apps : These are preinstalled Apps and can not be unInstalled without root access.
2 : User apps : These are 3rd party apps that we download from App Stores like Google Play Store.

In the Blog we will discuss how to get all Installed App and their Icon, Package Name, App Name and Size

Method to Fetch All Installed Apps

private void getInstalledApps() {

    PackageManager pm = getPackageManager();

         packs = getPackageManager().getInstalledPackages(0);
  
    for (int i = 0; i < packs.size(); i++) {
        PackageInfo p = packs.get(i);
        
            String appName = p.applicationInfo.loadLabel(getPackageManager()).toString();
            Drawable icon = p.applicationInfo.loadIcon(getPackageManager());
            String packageNAme = p.applicationInfo.packageName;
            File file = new File(p.applicationInfo.publicSourceDir);
            long sizeinBytes = file.length();
            

        
        }
        
    }

How to check whether an App is a System app or User App

boolean isSystemApp(PackageInfo pkgInfo)
{
    if((pkgInfo.applicationInfo.flags & (ApplicationInfo.FLAG_UPDATED_SYSTEM_APP | ApplicationInfo.FLAG_SYSTEM)) > 0)
     {
    
        return true;   // it is System app
    }
    else    {
          return false; // it is user App
     }
}

How to Launch An App
void launchApp(String appPackagneName)
{
    Intent intent1 = getPackageManager().getLaunchIntentForPackage(appPackagneName);
    if(intent1 != null){
        startActivity(intent1);
    }
    else {
        Toast.makeText(this, " Can't launch this.\nThe app may have been UnInstalled or Disabled.", Toast.LENGTH_SHORT).show();
    }
}


How to open App Info in Phone Setting

void showAppInfo(String appPackagneName)
{
    try {
        Intent intent = new Intent(android.provider.Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse("package:" +appPackagneName));
        //  Toast.makeText(MainActivity.this, installedApps.get(i).packages, Toast.LENGTH_SHORT).show();      startActivity(intent);
    }
    catch(Exception E){
        Toast.makeText(this, " Can't open App's Info.", Toast.LENGTH_SHORT).show();
    }
}

How to get and Share App's Play Store Link

void shareAppLink(String appPackagneName)
{
  
        String appLink = appItem.name + " Download Link : https://play.google.com/store/apps/details?id=" + appPackageName;
        Intent localIntent = new Intent();

        localIntent.setAction("android.intent.action.SEND");
        localIntent.putExtra("android.intent.extra.TEXT", appLink);
        localIntent.setType("text/plain");
        startActivity(Intent.createChooser(localIntent, "Share App Link"));
    

}

How the open an APP in Google Play Stor

void openAppInPlaystore(String appPackageName )
{
    
     
        try {
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
        } catch (android.content.ActivityNotFoundException anfe) {
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
        }
    
}




I hope you enjoyed it.

Add YouTube Video Player in Android App

How to Add Youtube Video in Android App

In our Android App we can easily add a youtube video link in our Android App.

For this we need to following things;

Step 1 : Create an API key

1. You must  create an API key on https://console.developers.google.com/
2. Go to the link
3. Click on Credentials in Left Pane
4. Click on "Create Credentials"

You need to enter your app package name and SHA Key, Click Save
Your API key will be created

See the Screenshot below.

Step 2 :  Add YouTubePlayerView in layout

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

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:orientation="vertical

"        android:background="#006080">

  
        <com.google.android.youtube.player.YouTubePlayerView 

           android:layout_marginTop="10dp"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:visibility="visible"

            android:layout_gravity="center_horizontal"

            android:id="@+id/youtube_player"      />


    </LinearLayout>

Loading Video in Activity

public class PlayYouTubeVideoActivity extends YouTubeBaseActivity
{

    YouTubePlayerView youTubePlayerView;
 
    YouTubePlayer.OnInitializedListener onInitializedListener;


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

        youTubePlayerView = (YouTubePlayerView) findViewById(R.id.youtube_player);
      
        onInitializedListener = new YouTubePlayer.OnInitializedListener(){
            @Override            
             public void onInitializationSuccess(YouTubePlayer.Provider provider,
                                               
             YouTubePlayer youTubePlayer, boolean b) {

                youTubePlayer.loadVideo("XXXXXXX");//Enter your Youtube Video ID here
                youTubePlayer.play();
            }

            @Override           
           public void onInitializationFailure(YouTubePlayer.Provider provider, 
             YouTubeInitializationResult youTubeInitializationResult) {
                Log.i("KAMLESH","Youtube not initialized 
             "+youTubeInitializationResult.getErrorDialog(PlayYouTubeVideoActivity.this,5));
            }
        };

        youTubePlayerView.initialize("ENTER YOUR API KEY HERE",onInitializedListener);


    }

}



Screenshot

How to Donate to creator of the Blog

I have created the blog and regularly posting usefull Android Articles.
I am doing this for my blog users.
If you like the work and want to support me,kindly donate.
Users of the Blog can donate me Using Pay Pal.

                                                           

What is GPS, How it works

GPS(Global Positioning System) is a satellite-based navigation system. It provides time and location-based information to a GPS receiver, located anywhere on or near the earth surface. GPS works in all weather conditions, provided there is an unobstructed line of sight communication with 4 or more GPS satellites. GPS is managed by the US Air Force

The Global Positioning System (GPS) is a network of about 30 satellites orbiting the Earth at an altitude of 20,000 km. The system was originally developed by the US government for military navigation but now anyone with a GPS device, be it a SatNav, mobile phone or handheld GPS unit, can receive the radio signals that the satellites broadcast.

Wherever you are on the planet, at least four GPS satellites are ‘visible’ at any time. Each one transmits information about its position and the current time at regular intervals. These signals, travelling at the speed of light, are intercepted by your GPS receiver, which calculates how far away each satellite is based on how long it took for the messages to arrive.

Any instant of time, there are at least 4 GPS satellites in line of sight to a receiver on the earth. Each of these GPS satellites sends information about its position and the current time to the GPS receiver at fixed regular instants of time. This information is transmitted to the receiver in the form of signal which is then intercepted by the receiver devices. These signals are radio signals that travel with the speed of light. The distance between a GPS receiver and the satellite is calculated by finding the difference between the time the signal was sent from GPS satellite and the time the GPS receiver received the signal.

Once the receiver receives the signal from at least three satellites, the receiver then points its location using trilateration process. A GPS requires at least 3 satellites to calculate 2-D position(latitude and longitude on a map). In this case, the GPS receiver assumes that it is located at mean sea level. However, it requires at least 4 satellites to find receivers 3-D position(latitude, longitude, and altitude).

Click to get Yor GPS Coordinates.

How to check Radiation Level of Android Phone

What is SAR

Specific Absorption Rate (SAR) is a measure of the rate at which energy is absorbed per unit mass by a human body when exposed to a radio frequency (RF) electromagnetic field. It can also refer to absorption of other forms of energy by tissue, including ultrasound.[1]
It is defined as the power absorbed per mass of tissue and has units of watts per kilogram (W/kg).

All mobile phone models are tested to make sure they meet national and international exposure limits for exposure to radiofrequency emissions, before they can be sold in each market.

The SAR values reported for each model of mobile phone tend to significantly overstate real-life exposure levels, as models of phones are tested at maximum power levels under laboratory conditions to ensure that they comply.

Mobile phones tend not to operate at maximum power levels during everyday use.

In order to avoid network interference, improve battery life and available call time, mobile phones constantly adapt to the minimum power required to make and maintain a call.

How to check Radiation Level in Phone

Open Dialer and type   *#07#

A  dialog will open showing  your Phone's SAR level

SAR Normal Value : 1.6 W/KG

If your phone's SAR is leass 1.6, it is good.

The lesser SAR, better for you.

 

New Advance Topics:                   Android LiveWallpaer Tutorial
Android ImageSwitcher                    Android TextSwitcher                                Android ViewFlipper
Android Gesture Detector               Handling/Detecting Swipe Events                Gradient Drawable
Detecting Missed Calls                    Hide Title Bar                                           GridView Animation
Android AlarmManager                 Android BootReceiver                       Vibrate Phone In a Desirable Pattern    
Developing for Different Screen Sizes           Showing Toast for Longer Time       Publishing your App
How to publish Android App on Google Play
Android TextWatcher                               Android ExpandableListView
Android Image Slider Example
Android Custom GridView Example
Android MediaPlayer Example
Android Text To Speech Example
How to check Radiation Level of Android Phone
How to find Advertising ID of Android Phone
CountDownTimer in Android Example


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

 Advance Android Topics                                                              Customizing Android Views

      Customizing Toast In Android                                                        Customizing Radio Buttons

      Showing Toast for Longer Time                                                      Customizing Checkboxes In Android

      Customizing the Display Time of Toast                                           Customizing ProgressBar

      Using TimePickerDialog and DatePickerDialog In android                 Customizing Toast In Android

      Animating A Button In Android

      Populating ListView With DataBase                                           Android Animation

      Increasin Size of Checkboxes                                                   Using Android ImageSwitcher  

      Android ProgressBar                                                                 Using Android TextSwitcher

      Designing For Different Screen Sizes                                            GridView Animation

      Handling Keyboard Events                                                        Animating A Button In Android
                                                                                                         Android ViewAnimator Example

Alarm Manager     
Android AlarmManger
Scheduling Task Using AlarmManger

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 RatingBar Example
                                                                           Deeveloping Simple Calculator App in Android

Android Advance Views
Android Spinner                                                                           Android GalleryView
Android TabWidget                                                                      Android ExpandableListView

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      
PreferenceActivity In Android                                            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 :  Introduction of SQLiteDataBase
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
How to Hide Title Bar In Android
How to show an Activity in Landscape or Portrait Mode only.
How to Set an Image as Wallpaper.