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Custom App for Android : Development

Monday, June 3rd, 2013 at 9:40 am

The android platform has been growing at a rapid rate over the years. With the high number of new devices being activated every day, it is becoming more and more necessary to have apps on the market. The huge market presented by this new ecosystem is one that can be taken advantage of by having apps on the Google Play Store as soon as one is able to. The increased use of mobile devices on the android platform for daily use such as business and communication also makes it a huge potential for apps to thrive. Companies can have a custom app for android made so that they are able to take advantage of the mobility presented by these devices to make the best of their employees. There are a couple of things that are involved in making a custom app for android and these involve a couple of steps which are listed below.

Custom app for android

1. Planning the app

The custom app for android needs proper planning in order to be successful. Things that should be taken into consideration at this point include the type of app. This can be

Multimedia based
Location based apps
Web based apps
Enterprise apps
Entertainment apps
Productivity apps and so on

The type of app will determine the APIs that will be used in the app and the Smartphone features that will be utilized. For example, a multimedia app may make use of the camera, sound recorder, and speaker among others. This will need to be taken into consideration before the actual development is started in order for the developers to make an estimate of how long the development is going to take and how much it is going to cost. The user interface is also designed at this point and the client agrees with the developers on the best user interface to use. This having being done, actual development can now start.

2. Development

Developing a custom app for android takes time, resources and dedications. Developers make use of a variety of tools at their disposal such as the eclipse SDK or Android Studio to make the apps. The assets to be used for the app such as buttons and icons are also designed using graphic applications such as Photoshop. Throughout the development period for the custom app for android, testing is done to ensure that the app performs as expected. This is done on emulators and on actual devices. Working prototypes can be sent to the client so that they can experience the progress being made by the developers and if possible suggest changes and improvements that should be made. When this is done and approval is done by both parties, the app is ready to be deployed.

3. Release of the custom app

There are a variety of ways in which the custom app for android can be deployed to the users. This can be done using official channels such as app stores and also through other means such as email and posting on company websites. This is entirely on the clients to decide and it only takes a few days to complete.

In conclusion, developing a custom app for android does not take much and can be done in a few weeks as long as the requirements are captures clearly from the beginning.

Google Play App Developer : Responsibilities

Monday, June 3rd, 2013 at 8:31 am

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There are many responsibilities that come with being a Google play app developer. This does not only involve coding, but also the entire development process straight from UI/UX design to the final launch. The sections below show the responsibilities of a Google play app developer and what each responsibility involves.

Google play app developer

1. UI/UX Design

Mobile apps have to be beautiful and easy to use. For this reason, they need to have an intuitive user interface and an exciting user experience. This is one major factor that determines how the users are going to like using an app. User interfaces have to be consistent with the functionality of the app and it is upon the Google play app developer to make sketches of the final app for approval by the clients and other parties involved in the development process. The sketches are made in the form of wireframes and they show the transition between the various screens and how they are connected together.

2. Coding and Refactoring

A Google play app developer is hugely tasked with the actual coding of the app. This involves writing the code that forms the core logic of the app. This can be done using a variety of tools and programming languages. The major tools in the developer toolbox may include:-

Eclipse SDK
Android Studio
Android debug bridge
Android virtual devices
Third party SDKs and libraries for added functionalities such as advertisements and app analytics

These tools are very important as they aid the Google play app developer in the coding and refactoring stage. The coding and refactoring also makes use of a variety of algorithms which the developer uses in order to maximize the utilization of smart phone resources without diminishing the battery.

Some of the major programming languages that a Google play app developer may make use of include:-

Java
C++
C
C#

The main language is Java although the other ones can be used when the developer wants to communicate directly with the hardware of the device especially when the performance of the app is a critical issue.

3. Testing

This is a very important stage of any mobile app development process. It involves running the app on a variety of simulators and devices in order to see how the app will look like and perform on the devices. These devices have to be of different configurations in order to see the differences that may occur. This is necessary in order for the developer to optimize the app for various devices such as tablets. Properly tested apps can be released to the market which is the final responsibility for the Google play app developer.

4. Releasing

The Google play store is a huge place with a lot of apps being added each and every day. In order for an app to stand out from the rest, it has to be unique and follow the guidelines set by Google. The developer is responsible for preparing the store listings for the app. This includes screenshots of the app, descriptions and the actual app.

In conclusion, a Google play app developer is responsible for a variety of tasks which are all critical to the success of an app. They therefore need to be up to date on all the new technologies and developer tools in order to keep up with the rapidly changing mobile landscape.

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Send Brag via Android Social Network Gaming app (Facebook)

Friday, May 31st, 2013 at 10:08 am

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If you want to send brag or update status form your app, then you need to create an application in your facebook developer account. Then after loggin in your android app which has FB app id you need to invoke a request with publish_post permission. try this..

private void sendBrag() {

    	Bundle params = new Bundle();
    	GraphUser currentFBUser = application.getCurrentFBUser();
    	if (currentFBUser != null) {
    		params.putString("link", your_app_link+""+currentFBUser.getId());
    	}

    	params.putString("name", "Checkout my new app!");
    	params.putString("caption", "Come and win me!");
    	params.putString("description", "friends! Can you beat my score?");
    	params.putString("picture", PIC_URL);

    	showDialogWithoutNotificationBar("feed", params);
}

private void showDialogWithoutNotificationBar(String action, Bundle params) {
        // Create the dialog
        dialog = new WebDialog.Builder(getActivity(), Session.getActiveSession(), action, params).setOnCompleteListener(
                new WebDialog.OnCompleteListener() {

            @Override
            public void onComplete(Bundle values, FacebookException error) {
                if (error != null && !(error instanceof FacebookOperationCanceledException)) {
                    ((YOUR_ACTIVITY)getActivity()).showError(getResources().getString(R.string.network_error), false);
                }
                dialog = null;
                dialogAction = null;
                dialogParams = null;
            }
        }).build();

        // Hide the notification bar and resize to full screen
        Window dialog_window = dialog.getWindow();
        dialog_window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

        // Store the dialog information in attributes
        dialogAction = action;
        dialogParams = params;

        // Show the dialog
        dialog.show();
}

private void sendBrag() {

Bundle params = new Bundle();

GraphUser currentFBUser = application.getCurrentFBUser();

if (currentFBUser != null) {

params.putString("link", your_app_link+""+currentFBUser.getId());

}

params.putString("name", "Checkout my new app!");

params.putString("caption", "Come and win me!");

params.putString("description", "friends! Can you beat my score?");

params.putString("picture", PIC_URL);

showDialogWithoutNotificationBar("feed", params);

}

private void showDialogWithoutNotificationBar(String action, Bundle params) {

// Create the dialog

dialog = new WebDialog.Builder(getActivity(), Session.getActiveSession(), action, params).setOnCompleteListener(

new WebDialog.OnCompleteListener() {

@Override

public void onComplete(Bundle values, FacebookException error) {

if (error != null && !(error instanceof FacebookOperationCanceledException)) {

((YOUR_ACTIVITY)getActivity()).showError(getResources().getString(R.string.network_error), false);

}

dialog = null;

dialogAction = null;

dialogParams = null;

}

}).build();

// Hide the notification bar and resize to full screen

Window dialog_window = dialog.getWindow();

dialog_window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

// Store the dialog information in attributes

dialogAction = action;

dialogParams = params;

// Show the dialog

dialog.show();

}

Send App request via Android Social Network Gaming app (Facebook)

Friday, May 31st, 2013 at 9:53 am

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If you want to send request to your friends for your app, then you need to create an application in your facebook developer account. Then after loggin in your android app which has FB app id you need to invoke a request with publish_post permission. try this..

private void sendChallenge() {

    	Bundle params = new Bundle();
    	params.putString("message", "Try my game!!");
    	showDialogWithoutNotificationBar("apprequests", params);
}

private void showDialogWithoutNotificationBar(String action, Bundle params) {
		// Create the dialog
		dialog = new WebDialog.Builder(getActivity(), Session.getActiveSession(), action, params).setOnCompleteListener(
				new WebDialog.OnCompleteListener() {

			@Override
			public void onComplete(Bundle values, FacebookException error) {
				if (error != null && !(error instanceof FacebookOperationCanceledException)) {
					((YOUR_ACTIVITY)getActivity()).showError(getResources().getString(R.string.network_error), false);
				}
				dialog = null;
				dialogAction = null;
				dialogParams = null;
			}
		}).build();

		// Hide the notification bar and resize to full screen
		Window dialog_window = dialog.getWindow();
    	dialog_window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    	// Store the dialog information in attributes
    	dialogAction = action;
    	dialogParams = params;

    	// Show the dialog
    	dialog.show();
	}

private void sendChallenge() {

Bundle params = new Bundle();

params.putString("message", "Try my game!!");

showDialogWithoutNotificationBar("apprequests", params);

}

private void showDialogWithoutNotificationBar(String action, Bundle params) {

// Create the dialog

dialog = new WebDialog.Builder(getActivity(), Session.getActiveSession(), action, params).setOnCompleteListener(

new WebDialog.OnCompleteListener() {

@Override

public void onComplete(Bundle values, FacebookException error) {

if (error != null && !(error instanceof FacebookOperationCanceledException)) {

((YOUR_ACTIVITY)getActivity()).showError(getResources().getString(R.string.network_error), false);

}

dialog = null;

dialogAction = null;

dialogParams = null;

}

}).build();

// Hide the notification bar and resize to full screen

Window dialog_window = dialog.getWindow();

dialog_window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

// Store the dialog information in attributes

dialogAction = action;

dialogParams = params;

// Show the dialog

dialog.show();

}

To delete an sqlite database file from android

Friday, May 31st, 2013 at 9:44 am

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To delete an sqlite database file from android, you have to write a single line of code:

deleteDatabase(“your database name”);

That’t it!

Check if SD card is present

Friday, May 31st, 2013 at 9:25 am

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Sometimes we need to know whether an SD card is present or not. So here is a check to see if an SD card is present. It returns true if the SD card is present and writable, false otherwise.

public static boolean isSdPresent() {
    return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
}

public static boolean isSdPresent() {

return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);

}

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AlertDialog rating

Friday, May 31st, 2013 at 9:25 am

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AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("If you like it give 5 stars ;)")
       .setCancelable(false)
       .setPositiveButton("Yes > Go Market", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {

                dialog.cancel();
                startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=") ) );     

           }
       })
       .setNegativeButton("No, later", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
        dialog.cancel();

           }
       });
alert = builder.create();
alert.show();

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setMessage("If you like it give 5 stars ;)")

.setCancelable(false)

.setPositiveButton("Yes > Go Market", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int id) {

dialog.cancel();

startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=") ) );

}

})

.setNegativeButton("No, later", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int id) {

dialog.cancel();

}

});

alert = builder.create();

alert.show();

Open twitter via Intent

Friday, May 31st, 2013 at 9:11 am

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try {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("twitter://user?screen_name=" + twitter_user_name)));
}catch (Exception e) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://twitter.com/#!/" + twitter_user_name)));
}

try {

startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("twitter://user?screen_name=" + twitter_user_name)));

}catch (Exception e) {

startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://twitter.com/#!/" + twitter_user_name)));

}

Android ImageButton Example

Friday, May 31st, 2013 at 8:48 am

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In Android, you can use “android.widget.ImageButton” to display a normal “Button“, with a customized background image.

In this tutorial, we show you how to display a button with a background image named “android_button.png“, when user click on it, display a short message. As simple as that.
Note
You may also like this Android ImageButton selector example, which allow to change button’s images depends on button states.
P.S This project is developed in Eclipse 3.7, and tested with Android 2.3.3.

1. Add Image to Resources

Put image “android_button.png” into “res/drawable-?dpi” folder. So that Android know where to find your image.

2. Add ImageButton

Open “res/layout/main.xml” file, add a “ImageButton” tag, and defined the background image via “android:src“.

File : res/layout/main.xml

<?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" >

    <ImageButton
        android:id="@+id/imageButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/android_button" />

</LinearLayout>

<?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" >

<ImageButton

android:id="@+id/imageButton1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/android_button" />

</LinearLayout>

3. Code Code

Here’s the code, add a click listener on image button.

File : MyAndroidAppActivity.java

package com.mkyong.android;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageButton;
import android.widget.Toast;
import android.view.View;
import android.view.View.OnClickListener;

public class MyAndroidAppActivity extends Activity {

	ImageButton imageButton;

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

		addListenerOnButton();

	}

	public void addListenerOnButton() {

		imageButton = (ImageButton) findViewById(R.id.imageButton1);

		imageButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {

			   Toast.makeText(MyAndroidAppActivity.this,
				"ImageButton is clicked!", Toast.LENGTH_SHORT).show();

			}

		});

	}

}

package com.mkyong.android;

import android.app.Activity;

import android.os.Bundle;

import android.widget.ImageButton;

import android.widget.Toast;

import android.view.View;

import android.view.View.OnClickListener;

public class MyAndroidAppActivity extends Activity {

ImageButton imageButton;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

addListenerOnButton();

}

public void addListenerOnButton() {

imageButton = (ImageButton) findViewById(R.id.imageButton1);

imageButton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

Toast.makeText(MyAndroidAppActivity.this,

"ImageButton is clicked!", Toast.LENGTH_SHORT).show();

}

});

}

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Android ImageView Example

Friday, May 31st, 2013 at 8:46 am

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1. Add Image to Resources

Put your images into folder “res/drawable-ldpi“, “res/drawable-mdpi” or “res/drawable-hdpi“.

See figure below, no matter which folder you put, Android will find your image automatically. In this case, both “android.png” and “android3d.png” images are used for demonstration.
Note
Again, read official Android’s “Drawable Resource” and “Screen Support” article to understand what is dpi and resources in Android.

2. Add ImageView

Open “res/layout/main.xml” file, just add an ImageView and Button for demonstration. By default, imageView1 will display “android.png”.

File : res/layout/main.xml

<?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" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/android" />

    <Button
        android:id="@+id/btnChangeImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Change Image" />

</LinearLayout>

<?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" >

<ImageView

android:id="@+id/imageView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/android" />

<Button

android:id="@+id/btnChangeImage"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Change Image" />

</LinearLayout>

3. Code Code

Simple, when button is clicked, change it to “android3d.png”.
File : MyAndroidAppActivity.java

package com.mkyong.android;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.ImageView;
import android.view.View;
import android.view.View.OnClickListener;

public class MyAndroidAppActivity extends Activity {

	Button button;
	ImageView image;

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

		addListenerOnButton();

	}

	public void addListenerOnButton() {

		image = (ImageView) findViewById(R.id.imageView1);

		button = (Button) findViewById(R.id.btnChangeImage);
		button.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {
				image.setImageResource(R.drawable.android3d);
			}

		});

	}

}

package com.mkyong.android;

import android.app.Activity;

import android.os.Bundle;

import android.widget.Button;

import android.widget.ImageView;

import android.view.View;

import android.view.View.OnClickListener;

public class MyAndroidAppActivity extends Activity {

Button button;

ImageView image;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

addListenerOnButton();

}

public void addListenerOnButton() {

image = (ImageView) findViewById(R.id.imageView1);

button = (Button) findViewById(R.id.btnChangeImage);

button.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

image.setImageResource(R.drawable.android3d);

}

});

}

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Custom App for Android : Development

Google Play App Developer : Responsibilities

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Send Brag via Android Social Network Gaming app (Facebook)

Send App request via Android Social Network Gaming app (Facebook)

To delete an sqlite database file from android

Check if SD card is present

Incoming search terms:

AlertDialog rating

Open twitter via Intent

Android ImageButton Example

1. Add Image to Resources

2. Add ImageButton

3. Code Code

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Android ImageView Example

1. Add Image to Resources

2. Add ImageView

3. Code Code

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