Create Image and resize Image : Image « 2D Graphics « Android

Create Image and resize Image


//package com.runlog;

import android.content.Context;
import android.widget.ImageView;
import android.widget.Toast;

 * AppUtils is a helper class that makes it easy to perform frequently used
 * tasks in Android development.
 * @author Nazmul Idris
 * @version 1.0
 * @since Jul 8, 2008, 2:35:39 PM
public class AppUtils {

   * in the emulator points back to itself. Use this if you want to
   * access your host OS
  public static String EmulatorLocalhost = "";

   * shows a short message on top of your app... it goes away automatically
   * after a short delay
  public static void showToastShort(Activity a, String msg) {
    Toast.makeText(a, msg, Toast.LENGTH_SHORT).show();

   * shows a short message on top of your app... it goes away automatically
   * after a long delay
  public static void showToastLong(Activity a, String msg) {
    Toast.makeText(a, msg, Toast.LENGTH_LONG).show();

  public static void showToast(Activity a, String msg, int length) {
    Toast.makeText(a, msg, length).show();

   * create an image view, given a drawable. you can set the max size of this
   * imageview as well.
   * @param iconWidth
   *            -1 means dont set this
   * @param iconHeight
   *            -1 means dont set this
   * @param imageRes
   *            -1 means dont set this
  public static ImageView createImageView(Context activity, int iconWidth,
      int iconHeight, int imageRes) {
    ImageView icon = new ImageView(activity);

    if (iconHeight != -1)
    if (iconWidth != -1)

    if (imageRes != -1)
    return icon;

  /** simply resizes a given drawable resource to the given width and height */
  public static Drawable resizeImage(Context ctx, int resId, int iconWidth,
      int iconHeight) {

    // load the origial Bitmap
    Bitmap BitmapOrg = BitmapFactory.decodeResource(ctx.getResources(),

    int width = BitmapOrg.getWidth();
    int height = BitmapOrg.getHeight();
    int newWidth = iconWidth;
    int newHeight = iconHeight;

    // calculate the scale
    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;

    // create a matrix for the manipulation
    Matrix matrix = new Matrix();
    // resize the Bitmap
    matrix.postScale(scaleWidth, scaleHeight);

    // if you want to rotate the Bitmap
    // matrix.postRotate(45);

    // recreate the new Bitmap
    Bitmap resizedBitmap = Bitmap.createBitmap(BitmapOrg, 0, 0, width,
        height, matrix, true);

    // make a Drawable from Bitmap to allow to set the Bitmap
    // to the ImageView, ImageButton or what ever
    return new BitmapDrawable(resizedBitmap);


}// end class AppUtils


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