Simple, best and standard way to make Thumbnail Images in PHP using Imagick

There is lot of way and plugins available to make thumbnail images in PHP. But that was the problem, because we are confused about which was the best one. After I research on these, I found using Imagick is the best one(Its only on my point of view.).

Imagick
Its an PHP extension to create or modify images. Imagick = Image + Magick. In old periods peoples wrote Magic as Magick. To install these run following command on your linux terminal.

pecl install imagick

After installing Imagick using above command, add “extension=imagick.so“ at the end on php.ini file which is located on /etc/php5/apache2/php.ini and restart the apache.

Example

<?php

$img_old_path = 'images/sun.jpg';     // Input image.

$img_new_path = 'images/thumbnail/sun.jpg';      // Output thumbnail image.

$img = new Imagick($img_old_path);

// Orientation operation start.
// If you remove this orientation block, there will no issue on generating thumbnail. But image may rotated if it has high difference in height and width.

$orientation = $img->getImageOrientation();

switch($orientation) {

    case imagick::ORIENTATION_BOTTOMRIGHT: 

        $img->rotateimage("#000", 180); // rotate 180 degrees.

    break;

    case imagick::ORIENTATION_RIGHTTOP:

        $img->rotateimage("#000", 90); // rotate 90 degrees CW.

    break;

    case imagick::ORIENTATION_LEFTBOTTOM: 

        $img->rotateimage("#000", -90); // rotate 90 degrees CCW.

    break;

}

$img->setImageOrientation(imagick::ORIENTATION_TOPLEFT);
// Orientation operation end.

$img->thumbnailImage(200 , 200, TRUE);
/* Max width and max height with best fit. Will return boolean;
This is the best method to make thumbnail. Action behind the scene is...
1. If given image width is larger than heigh then make thumbnail width as 200(here) and fix height according to that.

2. Else if image hight is larger than width then make thumbnail height as 200 and fix width according to that.*/

$img->writeImage($img_new_path); // Write the generated thumbnail. Will return boolean.

?>

References

http://php.net/manual/en/book.imagick.php

http://stackoverflow.com/questions/4266656/how-to-stop-php-imagick-auto-rotating-images-based-on-exif-orientation-data

Android: Change app background image when orientation change(toggle b/w landscape and portrait) without restarting main class

Avoid main or activity class restart:

To do this note go to bin/res/AndroidManifest.xml, and add the following line under any activity where you want disable activity class refresh when orientation change.

android:configChanges="orientation|screenSize"

Change background Image:

To do this go to src/com.example.<yourproject>/<yourclass>Activity.java, for example src/com.example.firstapp/MainActivity.java, and add following function.

public void onConfigurationChanged(Configuration newConfig)
{
   super.onConfigurationChanged(newConfig);
   View mainLayout = findViewById(R.id.main_layout); // getting the layout

  // Checks the orientation of the screen
  if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE)
  {
    mainLayout.setBackgroundResource(R.drawable.my_bg_land);
  }
  else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT)
  {
     mainLayout.setBackgroundResource(R.drawable.my_bg);
  }
}

Note:
Please note on above code we access layout by its id(main_layout). To use this we have note it on layout xml file(that is xml file for your specific activity which is under res/layout here:res/layout/activity_main.xml)

android:id="@+id/main_layout"

Reference:

Changing background of a layout at run time - http://manijshrestha.wordpress.com/2011/04/05/android-sdk-changing-background-of-a-layout-at-run-time/

Detect orientation change - http://stackoverflow.com/questions/5726657/how-to-detect-orientation-change-in-layout-in-android