How to save image or file to server in multi-part using volley?

♠ Posted by ANDROID THIRST in ANDROID TOTURIALS,EXAMPLES

Uploading files or Images to the server is the main task that every developer have faced in their development process. Here I will show you the way by which you can save an image or a file to the server in multipart form data using Volley.


In this example, we will save an Image to the server in multipart using Volley.

Create a class named PhotoMultipartRequest.

Then called this class constructor from the activity from where you want to save the image.
here below I am sharing you the code of the activity from where I am calling the constructor.

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Random password generator program in Java?

♠ Posted by ANDROID THIRST in EXAMPLES

A simple program in Java that generates a random password combination of Character, Number, Special symbols.

Here is the code snippet to generate random password in java..........

package password.generater;

import java.util.Random;

/**
 *
 * @author dell
 */
public class PasswordGenerater {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        int length= 8;
        System.out.println(generatePswd(length));
        
        // TODO code application logic here
    }
    static char[] generatePswd(int len){
        System.out.println("Your Password ");
        String charsCaps="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 
        String Chars="abcdefghijklmnopqrstuvwxyz";
        String nums="0123456789";
        String symbols="!@#$%^&*()_+-=.,/';:?><~*/-+";
        String passSymbols=charsCaps + Chars + nums +symbols;
        Random rnd=new Random();
        char[] password=new char[len];
        int index=0;
        for(int i=0; i<<len;i++){
            password[i]=passSymbols.charAt(rnd.nextInt(passSymbols.length()));
        }
      return password;
        
    }
}
/>

If you have any doubt then comment below.......

HAPPY PROGRAMMING

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How to print following number pattern in java?

♠ Posted by ANDROID THIRST

Here is the code snippet to print this number pattern in java..........

public class Pattern1 {
    public static void main(String[] args) {
      
        for(int i=1;i<=5;i++){
            for(int k=5;k>=i;k--){
                System.out.print(k);
            }
            System.out.println();
           
    }
   
    }
}

HAPPY PROGRAMMING

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What is the difference between xml based and Java based user interface?

♠ Posted by ANDROID THIRST in ANDROID TOTURIALS

Have you ever find trouble to differentiate between android based and java based layout creation.
In this article, I am going to give you a brief demonstration about how to differentiate between these two way.
The basic building block of Android UI is the layout. A layout defines the visual structure for a user interface . You can arrange layout in two different ways .

1. Declaring UI element in XML :-  This is most preferable method use to create the user interface in android. We can use this method  when we want to create a simple static user interface in our android application. We used this method when the layout does not change . Suppose you are going to create UI for the login screen , for creating this we used XML because the layout does not change the login screen in future.

2. Declaring UI element in Java:- In terms of strengths of Java coding approach to layout creation ,
perhaps the most significant advantage that java has over XML resource files comes into play when dealing with the dynamic user interface. XML resource files are inherently  most useful when defining static layouts, In other words, the layouts that are unlikely to change significantly from one invocation of an activity to next. On the other hand, Java code is ideal for creation user interface dynamically at run-time.This is particularly important in situations where  the user interface may appear differently each time the activity execute subject to an external factor. 

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Android resource management and activity Lifecycles

♠ Posted by ANDROID THIRST in Activity Lifecycle,ANDROID TOTURIALS

What is an Activity?
An activity is a single, focused thing that the user can do. Almost all activity interact with the user,
So the activity class takes care of creating a window for you in which you can place your UI.

Android Process State :-  Process host applications and applications are made up of components .
within Android system, the current state of the system is defined by the highest - ranking active component within the application that it hosts. A process can be in one of the following five states
at any given time :

Foreground Process:- These processes are assigned the highest level of priority.At any one times, there are unlikely to be more than one or two foreground process active and these are usually the last to be terminated by the system. It's an activity with which the user currently interacting.

Visible Process:- A process containing an activity that is visible to the user but is not the activity with which the user is interacting is classified as a “visible process”. This is typically the case when an activity in the process is visible to the user but another activity, such as a partial screen or dialog, is in the foreground.

Service Process:- Processes that contain a Service that has already been started and is currently executing.

Background Process:- A process that contains one or more activities that are not currently visible to the user, and does not host a Service that qualifies for Service Process status. Processes that fall into this category are at high risk of termination in the event that additional memory needs to be freed for higher priority processes.

Empty Process:-Empty processes no longer contain any active applications and are held in memory ready to serve as hosts for newly launched applications. This is somewhat analogous to keeping the doors open and the engine running on a bus in anticipation of passengers arriving.

Activity Stack:-For each application that is running on an Android device, the runtime system maintains an Activity Stack. When an application is launched, the first of the application’s activities to be started is placed onto the stack. When a second activity is started, it is placed on the top of the stack and the previous activity is pushed down. The activity at the top of the stack is referred to as the active (or running) activity. When the active activity exits, it is popped off the stack by the runtime and the activity located immediately beneath it in the stack becomes the currently active activity.

What is Activity Lifecycle?

The class Activity provides a number of well-defined methods that are called when an application is started, suspended , restarted and so on. An activity can be in one of a number of different states during the course   of it execution withing an application.

Active State:-The activity is at the top of the Activity Stack, is the foreground task visible on the device screen, has focus and is currently interacting with the user.

Paused State:-  The activity is visible to the user but does not currently have focus.

Stop State:- The activity is currently not visible to the user.

Killed:- The Activity has been terminated by the runtime system in order to free up memory and is no longer present on the Activity Stack.

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Java Program to print pattern

♠ Posted by ANDROID THIRST in PATTERN

Program to create this pattern in java is :-

public class Pattern1 {
    public static void main(String[] args) {
        int r=14;
        for(int i=1;i<=5;i++){
            for(int j=1;j<=r;j++){
                System.out.print("-");
            }
            for(int k=1;k<=i;k++){
                System.out.print("#");
            }
            r=r-2;
            System.out.println();
        }
    }
   
}
   

"HAPPY PROGRAMMING"

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How to work with button in android?

♠ Posted by ANDROID THIRST in ANDROID TOTURIALS

Buttons are the type of view that is created to be pressed . When the user clicks on the button in an android application the application is respond something. In this tutorial, we are going to create a different type of button .


There are three types of button in android
1.Button with Text
2. Button with Image
3.Button with Text and Image

1. Button with Text:-

Step 1. Create a project buttonWidget.

Step 2. Add following code in activity_main.xml


     

<
     Button 
 android:id="@+id/button1"
 android:layout_height="wrap_content" 
android:layout_width="wrap_content" 
android:text="ClickMe" 
android:textsize="30dp"
android: background="#0000aa" />

2. Button with Image: -

 Just under the Text button use ImageButton view to create an ImageButton . Put the following code just under the Text button.

<
ImageButton
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/imageButton"
      android:layout_centerVertical="true"
      android:layout_centerHorizontal="true"
      android:src="@mipmap/ic_launcher"/>

3.Button with Text and Image:- We can also create a button with Text and Image both . We can put text Left, Right, Above, 

Bellow of the Image .

'
<Button android:id="@+id/button" 
style="?android:attr/buttonStyleSmall" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:text="android" 
android:drawableLeft="@minmap/ic_launcher"
android:drawablePadding="10dp"/>

<HAPPY CODING>

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