Archive for the ‘Technology’ Category

Drag to connect!

Posted: April 1, 2017 in Android, Technology
Tags: , , , , ,

Hello Droids,

Connecting app with social media or connect to app with social media is great thing which we have seen in many apps.

Login with FB, Twitter, Google etc.. what we have seen is a button with icon and text waiting for a tap on it to do the rest things. (How boring! )

Lets add some UX to the social media connectivity 🙂

device-2017-04-01-160230

 

Checkout the code snippet from here :
https://bitbucket.org/snippets/rahulupadhyay27/bALjG

Implementation of this code will make your login screen more attractive.

 

Hope you will like this post.

Conceptualized by : https://material.uplabs.com/geesignz

Thanks 🙂

Keep Coding!

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Hello Droids 🙂

Want to make Profile screen more smooth with use of CoordinatorLayout?

Like this one :
device-2017-03-10-153458

Check out my snippet : https://bitbucket.org/snippets/rahul_devdigital/Leng7

Which works like :

 

Keep coding!

Hello droids!

Here is another quick solution for not letting your app get crash in Nougat devices.

Mostly crash occurs with file permission while taking photo or selecting image from the gallery in Nougat devices.

In general you will get FileUriExposedException.

How to solve this issue?
Here is the quick solution, you need to follow 3 – 4 steps and voila you’re done!

Step 1 : provider_paths.xml
Create provider_paths.xml to /res/xml directory

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="external_files" path="."/>
</paths>

Step 2 : AndroidManifst file update
Open your manifest file and add below tags in between <application> </application> tags.

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="${applicationId}.provider"
    android:exported="false"
    android:grantUriPermissions="true">
<meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths">
</provider>

 

Step 3 : Application class edit
Hope you are aware of how to declare application class. If not do comment on this post, I’ll let you know.

@Override
public void onCreate() {
    super.onCreate();
    //Allowing Strict mode policy for Nougat support
    StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
    StrictMode.setVmPolicy(builder.build());
}

Now, you are ready to access URI files from nougat enabled devices.
Don’t forget to add appropriate permissions to your manifest file for camera and external storage.

Have fun! Keep coding!

My Wallet – Coming Soon

Posted: May 27, 2016 in Technology

my_wallet

Hello all,

After getting so many +1 over stackoverflow for my answer on the question : How to use RecyclerView inside NestedScrollView?

You can add RecyclerView without adding it into NestedScrollView. How? Here is the trick:

<android.support.design.widget.CoordinatorLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
 android:layout_height="match_parent" android:fitsSystemWindows="true">

<android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
 android:layout_width="match_parent" android:theme="@style/AppTheme.AppBarOverlay">

 <android.support.v7.widget.Toolbar
 android:layout_width="match_parent"
 android:layout_height="?attr/actionBarSize"
 android:background="?attr/colorPrimary"
 app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
 app:layout_behavior="@string/appbar_scrolling_view_behavior"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
</android.support.design.widget.CoordinatorLayout>

The key thing here is :

 app:layout_behavior="@string/appbar_scrolling_view_behavior" 

Have fun! Keep Coding!

Now a days we are using Android Design Library to have rich look.

I’ve faced this problem while integrating RecyclerView with FAB (Floating Action Button) and I was not able to read the last line of it due to FAB was overlapping it.

I’ve tried this (Wrong assumption):


<android.support.v7.widget.RecyclerView 
android:id="@+id/my_recycler_view" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:padding_bottom="30dp"
/>

After some research found that its very easy to implement :

Method 1: Create Style

<style name="rvWithClipPadding">
<item name="android:clipToPadding">false</item>
<item name="android:paddingBottom">@dimen/margin_56dp</item>
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">match_parent</item>
<item name="android:scrollbars">vertical</item>
</style>

use this style in xml,

<android.support.v7.widget.RecyclerView 
android:id="@+id/my_recycler_view" 
style="@style/rvWithClipPadding"
/>

Method 2: Use attributes while creating

<android.support.v7.widget.RecyclerView 
android:id="@+id/my_recycler_view" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:clipToPadding="false" 
android:paddingBottom="30dp" 
android:scrollbars="vertical"/>

 

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Calendar Clock combination in DayDream!


Get it on Google Play

Waiting for your Comments and Response.

Hello Droids,

As we all aware about RPC (Remote Procedure Call) in Java, right?

Lets do the same thing in Android, different name same functioning in way better 🙂
AIDL (Android Interface Definition Language)

Here I’m going to provide you step by step guidance for implementing AIDL in android.

Let’s Start a new project and named it as your favorite one for this demo.

  • Create on .aidl extension file, actually it is interface file so name it as IRemoteService.aidl
  • After creating this file add signature method in this file as follow,
// Declare the interface

interface IStringOperations {
    // You can pass values in, out, or inout.
    // Primitive datatypes (such as int, boolean, etc.) can only be passed in.
    String concat(in String value1, in String value2);
}
  • Now, create one Java file into the same package and extends it to Service.

e.g.,

public class StringOperations extends Service{

	@Override
	public void onCreate() {
		super.onCreate();
	}

	@Override
	public IBinder onBind(Intent intent) {

		return mBinder;
	}

	/**
	 * @author Rahul Upadhyay
	 */
	private final IStringOperations.Stub mBinder = new IStringOperations.Stub() {
		/**
		 * Signature method which was declared in .aidl file will be coded here
		 * @author Rahul Upadhyay
		 */
		public String concat(String value1, String value2) throws RemoteException {
			return value1+ " "+ value2;
		}
	};

}
  • Now, create a client which will connect to this service with help of ServiceConnection, establishing ServiceConnection
/**
* @author Rahul Upadhyay
* ServiceConnection clsss to connect the service.
*/
	private ServiceConnection mServiceConnection = new ServiceConnection() {

		@Override
		public void onServiceDisconnected(ComponentName name) {

			// Set null to service to unbind the object
			service = null;
			Log.d(TAG, "onServiceConnected() disconnected");
		}

		@Override
		public void onServiceConnected(ComponentName name, IBinder boundService) {

			//allocate the service to the interface
			service = IStringOperations.Stub.asInterface(boundService);
			Log.d(TAG, "onServiceConnected() connected");

		}
	};
  • Bind the service,
/**
* bindService will call the onServiceConnected method which will bind the Service with the current activity
*/
		boolean ret = bindService(new Intent(this, StringOperations.class),
				mServiceConnection, Context.BIND_AUTO_CREATE);

		Log.d(TAG, "initService() bound with " + ret);
    use the Service method which is declared in .aidl
service.concat("Rahul ", "Upadhyay")

Download the example from here

Hello Droids,

As we get error in applying Facebook SSO (Single Sign On ) feature in app, stating that,

“your application is miss-configured..” the problem is in generating the Hash key.

So lets generate the hash key from the application not from the console and use that hash key in Facebook app, which will configure your app with Facebook SSO 🙂

here is the code for that,

/** 
* Add this code to print out the key hash, and use that KeyHash
* 
*/
 try {
      PackageInfo info = getPackageManager().getPackageInfo(
      "com.myapp", PackageManager.GET_SIGNATURES);
      for (Signature signature : info.signatures) {
          MessageDigest md = MessageDigest.getInstance("SHA");
          md.update(signature.toByteArray());
          Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
      }
} catch (NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}

We are about to implement MAP API2 in our project, here its Glimpse,

“https://developers.google.com/maps/documentation/android/”

  1.  do login here, https://code.google.com/apis/console/
  2.  on left side panel click on “Services”
  3.  find the service “Google Maps Android API v2” turn it on. Accept the terms and condition.
  4.  Now go back and click on “API Access”
  5.  Click on “Create new Android Key”
  6.  Paste SHA1 fingerprint there.

e.g., 9A:3D:9C:57:B6:46:E2:1C:EC:CF:BD:D3:EA:A6:B7:81:27:49:69:1A;com.example

here com.example – its an application package name

a. what is SHA1 key here?
Its a android debug keystore, where android app is Developed. when Signed APK is generated, this SHA1 will be regenerate using new keystore of application.
b. how to generate that?
open command prompt, and then

C:\Program Files\Java\jdk1.6.0_20\bin>keytool -list -v -keystore “c:\Users\admin\.android\debug.keystore”

you will prompt for password, enter “android” without qoute
It will give you the rtesult like this,

Keystore type: JKS
Keystore provider: SUN

Your keystore contains 1 entry

Alias name: androiddebugkey
Creation date: Nov 5, 2012
Entry type: PrivateKeyEntry
Certificate chain length: 1
Certificate[1]:
Owner: CN=Android Debug, O=Android, C=US
Issuer: CN=Android Debug, O=Android, C=US
Serial number: 50975212
Valid from: Mon Nov 05 11:13:46 IST 2012 until: Wed Oct 29 11:13:46 IST 2042

Certificate fingerprints:
MD5: BD:30:DD:77:0F:BE:82:A1:20:59:46:28:E7:11:E2:C8
SHA1: 9A:3D:9C:57:B6:46:E2:1C:EC:CF:BD:D3:EA:A6:B7:81:27:49:69:1A
Signature algorithm name: SHA1withRSA
Version: 3

*******************************************
*******************************************

C:\Program Files\Java\jdk1.6.0_20\bin>

this SHA1 is of my Computer local Keystore.

After generating new aandroid key,
it will be listed in your page, with Title saying “Key for Android apps (with certificates)”
You have to give me that API Key for implement MAP in application. It will look like “AIzaSyBmWleqdGClIWXXhgMbKAt-0aBxdohmmaM”

Then and then MAP can be loaded.

NOTE: If you are not getting this then please follow this link, https://developers.google.com/maps/documentation/android/start#the_google_maps_api_key

Now lets start code in Project,

create on layout file, map_activity.xml
and paste this code,

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/asdf"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.MapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </fragment>

</LinearLayout>

Now, create one Class file in your project, MapActivity.java

Code it like this,


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.example.R;

public class MapActivity extends Activity {

	private final String tag = getClass().getName();

	private GoogleMap googleMap;
	private Double lat, lon;
	private LatLng latLng;

	@Override
	protected void onCreate(Bundle arg0) {
		super.onCreate(arg0);
		 setContentView(R.layout.map_activity);

	/**
	*provide lat long
	*/
			lat =  gpsLocationTracker.getLatitude();
			lon =  gpsLocationTracker.getLongitude();

	        latLng = new LatLng(lat, lon);
	        try {

	        	googleMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
				CameraPosition cp = new CameraPosition.Builder()
				.target(new LatLng(lat,lon))
				.zoom(12)
				.build();
				googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cp));

				/*adding custom marker on the map*/
				googleMap.addMarker(new MarkerOptions()
						.draggable(true)
						.position(latLng)
						.title("My First Marker")
						.snippet(""+latLng)
						.icon(BitmapDescriptorFactory
								.fromResource(R.drawable.ic_launcher)));
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

	}

	}

Now, in AndroidManifest.xml

<uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="16" />

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

    <!-- MAP API V2 -->
    <permission
        android:name="com.example.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

    <uses-permission android:name="com.example.permission.MAPS_RECEIVE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

    <!-- MAP API V2 -->
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

now inside Application tag

<!-- MAP Api V2 -->
<!-- Place your ANDROID API KEY for MAP at res/string/mapv2 -->
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="@string/mapv2" />
<activity android:name="com.plunder.utility.MapActivity" >

NOTE: Don’t forget to include Library project, you can find it here