Control Statements in Android

Switch Statement

HOW TO USE SWITCH STATEMENT IN ANDROID/JAVA?

Switch case statements are a substitute for long if statements that compare a variable to several integral values

• The switch statement is a multiway branch statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression.
• Switch is a control statement that allows a value to change control of execution.

SYNTAX

switch(index){
    case 0:
        //Do this and this        break;
    case 1:
        //Do this and this        break;
    case 2:
        //Do this and this:        break;
    default: //For all other cases, do this        break;
}

How To Make Splash Screen in Android Studio

How to make Splash Screen in your android project.

Steps

Create new project to give application name as SplashScreen

Keeping minimum SDK 

Add on Activity and then finish to open new project.


Then add to EmptyActivity activity in your project.

Select EmptyActivity and give name SplashScreen

For display image copy to drawable folder.

Add to image view in activity_splash.xml file

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.root.splashscreen.SplashActivity">

    <ImageView        

          android:layout_width="match_parent"        

          android:layout_height="match_parent"        

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

</RelativeLayout>

Then change theme to select NoTitlebar.


Then go to our main job as three minutes display  splash screen.

Open SplashActivity.java to add this codes

package com.example.root.splashscreen;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class SplashActivity extends AppCompatActivity {

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

        Thread myThread = new Thread(){
            @Override
            public void run() {
                try {
                    sleep(3000);
                    Intent intent = new Intent(getApplicationContext(),MainActivity.class);
                    startActivity(intent);
                    finish();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        };
        myThread.start();


        
    }
}

Then set Splash Screen to start activity.

Go to open manifest file

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.root.splashscreen">

    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">

        <activity android:name=".SplashActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".MainActivity"></activity>
    </application>

</manifest>

Code that hides title bar of activity

1. requestWindowFeature(Window.FEATURE_NO_TITLE);//will hide the title   
2. getSupportActionBar().hide(); //hide the title bar  

The setFlags() method of Window class is used to display content in full screen mode. You need to pass theWindowManager.LayoutParams.FLAG_FULLSCREEN constant in the setFlags method.

Show/hide 'div' using JavaScript

Toggle between hiding and showing an element with JavaScript.

Add Html

<span class="label label-success" onclick="showDivtodo();">Show/Hide ToDo</span>
or using button
<button onclick="showDivtodo()">Show/Hide ToDo</button>     
<div  id="todo" style="display:none;">Show/Hide this text</div>
//Your code here..
</div>

Add JavaScript

function showDivtodo(){
      var x = document.getElementById("todo");
      if (x.style.display === "none") {
        x.style.display = "block";
      } else {
        x.style.display = "none";
      }        
    }

JavaScript Toggle (Hide/Show) an Element

Yii2 Create span tag in DetailView widget

The span tag is like the div tag. It has no meaning at all and is mostly used for styling by using an id or class

Code Here

[
'attribute' => 'is_status',
        'format' => 'raw',
'value' => (($model->is_status == '1') ? '<span class="label label-success">Active</span>' :      '<span class="label label-danger">Deactive</span>' ),
],

Create url in DetailView widget

           

 [
             'attribute' => 'notice_file_path',
'format' => 'raw',
'value' =>  (!empty($model->notice_file_path) ? Html::a($model->notice_file_path, ['notice-file', 'nid' => $model->notice_id], $htmlOptions=["target"=>"_blank", 'data' => ['method' => 'post',]]) : " - ")
    ],

Replace First Occurrence of String With PHP

using preg_replace.

preg_replace — Perform a regular expression search and replace

mixed preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [,int &$count ]] )


Example

preg_replace('/nothing/', 'something', $str, 1);

Example


<?php

$str="Dear Parent, Fee dues of Mr {V} is {V} on {V}";
echo $str ."<br>";
$c='Shaneesh';
$str= preg_replace("/{V}/", $c, $str, 1);
$str= preg_replace("/{V}/", '2500', $str, 1);
$str= preg_replace("/{V}/", '10-12-2019', $str, 1);
echo $str."<br>";

?>

Output

Dear Parent, Fee dues of Mr {V} is {V} on {V}
Dear Parent, Fee dues of Mr Shaneesh is 2500 on 10-12-2019

Calculating Age from Birthdate

Calculate age from given birthdate

How to Calculate Age from Date of Birth in PHP

<?php

$dateOfBirth = "21-12-1983";
$today = date("Y-m-d");
$diff = date_diff(date_create($dateOfBirth), date_create($today));
echo 'Age is '.$diff->format('%y');

?>




VB6 Code

Function Age (varBirthDate As Variant) As Integer 

 Dim varAge As Variant 

 If IsNull(varBirthdate) then Age = 0: Exit Function 

 varAge = DateDiff("yyyy", varBirthDate, Now) 
 If Date < DateSerial(Year(Now), Month(varBirthDate), _ 
 Day(varBirthDate)) Then 
 varAge = varAge - 1 
 End If 
 Age = CInt(varAge) 

 End Function

Forcefully Close a Program in Ubuntu

How to close a program from the terminal in ubuntu

1. The program name with:

   pkill <name_of_program>
   

2. use of program PID (process id)
   • kill it with kill <PID>

Steps for close program

1. open a Terminal window

2. To view a list of running processes, enter the following text at the prompt and press Enter.

$ ps -A

eg : pkill filezilla   - use program name.


To kill a process using its PID, enter the “killall” command (without the quotes) at the prompt, followed by a space, and then the corresponding PID from the generated list. Press Enter.