When Larry met Sergey – A Google Story

Here's a nice slideshow of the history of Google; from its founding days to its current state.


Created by Online PhD

Hit "Like" below and share it with your friends. If you like this, you'd also like its Facebook page.

check Phone is in Sleep or Normal Mode for Android

In this tutorial we will learn how to check whether our Android mobile is in Sleep or Idle(normal) mode.

We will use Broadcast Receiver and Intents to get notify when our device goes Sleep or Idle mode.

okay! so let's try this small app

 -------------------------------------------
App Name: SleepModeCheck
Package Name: com.rdc
Android SDK: Android SDK 2.3.3 / API 10
Default Activity Name: SleepModeCheckActivity
-------------------------------------------

SleepModeCheckActivity.java

package com.rdc;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;

public class SleepModeCheckActivity extends Activity {

 BroadcastReceiver mReceiver = null;

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

  // initialize receiver
  IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
  filter.addAction(Intent.ACTION_SCREEN_OFF);
  mReceiver = new ScreenReceiver();
  registerReceiver(mReceiver, filter);
 }

 @Override
 protected void onDestroy() {
  // unregister receiver
  this.unregisterReceiver(mReceiver);
  super.onDestroy();
 }
}

ScreenReceiver.java (Broadcast Receiver)

package com.rdc;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class ScreenReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
  if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
   // do whatever you need to do here
   Log.v("Debug", "Mobile is in slepp mode..");

  } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
   // and do whatever you need to do here
   Log.v("Debug", "Mobile is in normal mode..");

  }
 }
}

AndroidManifest.xml

Run App with Real Device or Emulator

And Switch the Sleep/Normal mode using power Button ... and see Log cat you will get message

whether device is in sleep or Idle mode via Receiver.

You can download the complete source code zip file here : SleepModeCheck

I'd love to hear your thoughts! 

Get Current Location coordinates , City name

Sometime we need to get  GPS  coordinates in android. so today i am going to write step by step simple tutorial How can we get location coordinates using GPS in android mobile.

also through coordinate we can calculate current location more details like City Name.

Note: I have tested this app on My Android Mobile and its working fine.
But when you test this app, enable your gps settings in mobile, you need to change current location like 10-20 meter so you will get the coordinates, so need to move with the installed app mobile device.

What this app does?

• Check gps is enable or disable.
• Get gps coordinates.
• Get the current city name.

okay! so let's try this small app

 -------------------------------------------
App Name: GetCurrentLocation
Package Name: com.rdc
Android SDK: Android SDK 2.3.3 / API 10
Default Activity Name: GetCurrentLocation
-------------------------------------------


GetCurrentLocation.java

package com.rdc;

import java.io.IOException;
import java.util.List;
import java.util.Locale;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

public class GetCurrentLocation extends Activity 
implements OnClickListener {
 
 private LocationManager locationMangaer=null;
 private LocationListener locationListener=null; 
 
 private Button btnGetLocation = null;
 private EditText editLocation = null; 
 private ProgressBar pb =null;
 
 private static final String TAG = "Debug";
 private Boolean flag = false;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  
  
  //if you want to lock screen for always Portrait mode  
  setRequestedOrientation(ActivityInfo
  .SCREEN_ORIENTATION_PORTRAIT);

  pb = (ProgressBar) findViewById(R.id.progressBar1);
  pb.setVisibility(View.INVISIBLE);
  
  editLocation = (EditText) findViewById(R.id.editTextLocation); 

  btnGetLocation = (Button) findViewById(R.id.btnLocation);
  btnGetLocation.setOnClickListener(this);
  
  locationMangaer = (LocationManager) 
  getSystemService(Context.LOCATION_SERVICE);

 }

 @Override
 public void onClick(View v) {
  flag = displayGpsStatus();
  if (flag) {
   
   Log.v(TAG, "onClick");  
   
   editLocation.setText("Please!! move your device to"+
   " see the changes in coordinates."+"\nWait..");
   
   pb.setVisibility(View.VISIBLE);
   locationListener = new MyLocationListener();

   locationMangaer.requestLocationUpdates(LocationManager
   .GPS_PROVIDER, 5000, 10,locationListener);
   
   } else {
   alertbox("Gps Status!!", "Your GPS is: OFF");
  }

 }

 /*----Method to Check GPS is enable or disable ----- */
 private Boolean displayGpsStatus() {
  ContentResolver contentResolver = getBaseContext()
  .getContentResolver();
  boolean gpsStatus = Settings.Secure
  .isLocationProviderEnabled(contentResolver, 
  LocationManager.GPS_PROVIDER);
  if (gpsStatus) {
   return true;

  } else {
   return false;
  }
 }

 /*----------Method to create an AlertBox ------------- */
 protected void alertbox(String title, String mymessage) {
  AlertDialog.Builder builder = new AlertDialog.Builder(this);
  builder.setMessage("Your Device's GPS is Disable")
  .setCancelable(false)
  .setTitle("** Gps Status **")
  .setPositiveButton("Gps On",
   new DialogInterface.OnClickListener() {
   public void onClick(DialogInterface dialog, int id) {
   // finish the current activity
   // AlertBoxAdvance.this.finish();
   Intent myIntent = new Intent(
   Settings.ACTION_SECURITY_SETTINGS);
   startActivity(myIntent);
      dialog.cancel();
   }
   })
   .setNegativeButton("Cancel",
   new DialogInterface.OnClickListener() {
   public void onClick(DialogInterface dialog, int id) {
    // cancel the dialog box
    dialog.cancel();
    }
   });
  AlertDialog alert = builder.create();
  alert.show();
 }
 
 /*----------Listener class to get coordinates ------------- */
 private class MyLocationListener implements LocationListener {
        @Override
        public void onLocationChanged(Location loc) {
          
            editLocation.setText("");
            pb.setVisibility(View.INVISIBLE);
            Toast.makeText(getBaseContext(),"Location changed : Lat: " +
   loc.getLatitude()+ " Lng: " + loc.getLongitude(),
   Toast.LENGTH_SHORT).show();
            String longitude = "Longitude: " +loc.getLongitude();  
      Log.v(TAG, longitude);
      String latitude = "Latitude: " +loc.getLatitude();
      Log.v(TAG, latitude);
          
    /*----------to get City-Name from coordinates ------------- */
      String cityName=null;              
      Geocoder gcd = new Geocoder(getBaseContext(), 
   Locale.getDefault());             
      List<Address>  addresses;  
      try {  
      addresses = gcd.getFromLocation(loc.getLatitude(), loc
   .getLongitude(), 1);  
      if (addresses.size() > 0)  
         System.out.println(addresses.get(0).getLocality());  
         cityName=addresses.get(0).getLocality();  
        } catch (IOException e) {            
        e.printStackTrace();  
      } 
          
      String s = longitude+"\n"+latitude +
   "\n\nMy Currrent City is: "+cityName;
           editLocation.setText(s);
        }

        @Override
        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub         
        }

        @Override
        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub         
        }

        @Override
        public void onStatusChanged(String provider, 
  int status, Bundle extras) {
            // TODO Auto-generated method stub         
        }
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:weightSum="1">
 <TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="Get Current Location and City Name"
  android:layout_weight="0.20"
  android:gravity="center"
  android:textSize="20sp" />
 <EditText
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_weight="0.33"
  android:id="@+id/editTextLocation"
  android:editable="false">
  <requestFocus></requestFocus>
 </EditText>
 <LinearLayout
  android:id="@+id/layButtonH"
  android:layout_height="wrap_content"
  android:layout_width="fill_parent"
  android:gravity="center"
  android:layout_weight="0.15">
  <Button
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Get Location"
   android:id="@+id/btnLocation"></Button>
 </LinearLayout>
 <LinearLayout
  android:id="@+id/layloadingH"
  android:layout_height="wrap_content"
  android:layout_weight="0.20"
  android:layout_width="fill_parent"
  android:gravity="center">
  <ProgressBar
   android:layout_width="wrap_content"
   android:id="@+id/progressBar1"
   android:layout_height="wrap_content"></ProgressBar>
 </LinearLayout>
</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest
 xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.rdc"
 android:versionCode="1"
 android:versionName="1.0">
 <uses-sdk android:minSdkVersion="10" />

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

 <application
  android:icon="@drawable/icon"
  android:label="@string/app_name">
  <activity
   android:name=".GetCurrentLocation"
   android:label="@string/app_name">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />
   <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
  </activity>

 </application>
</manifest>

The output Screen will be like this..

You can download the complete source code zip file here : GetCurrentLocation

 cheers!!

I'd love to hear your thoughts!

Check Current GPS Status ON/OFF

If you want to check your Android Mobile Device's GPS Status off or on programmatically
this tutorial is for you :)

We will create very simple app to do this work

okay! so let's try this small app

 -------------------------------------------
App Name: GpsStatusCheck
Package Name: com.rdc
Android SDK: Android SDK 2.3.3 / API 10
Default Activity Name: GpsStatusCheckActivity
-------------------------------------------

GpsStatusCheckActivity.java

package com.rdc;

import android.app.Activity;
import android.content.ContentResolver;

import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.TextView;

public class GpsStatusCheckActivity extends Activity {
 TextView textGpsStatus;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  textGpsStatus = (TextView) findViewById(R.id.gpsstatus);
 }

 @Override
 protected void onResume() {
  super.onResume();
  displayGpsStatus();
 }

 private void displayGpsStatus() {
  ContentResolver contentResolver = getBaseContext().getContentResolver();
  boolean gpsStatus = Settings.Secure.isLocationProviderEnabled(
    contentResolver, LocationManager.GPS_PROVIDER);
  if (gpsStatus) {
   textGpsStatus.setText("GPS is: ON");
  } else {
   textGpsStatus.setText("GPS is: OFF");
  }
 }
}

main.xml

AndroidManifest.xml

You can download the complete source code zip file here : GpsStatusCheck

cheers!!

I'd love to hear your thoughts!