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

1. Android
2. 2D Graphics
3. Image

Create Image and resize Image

   

//package com.runlog;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
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 {

  /**
   * 127.0.0.1 in the emulator points back to itself. Use this if you want to
   * access your host OS
   */
  public static String EmulatorLocalhost = "10.0.2.2";

  /**
   * 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);
    icon.setAdjustViewBounds(true);
    icon.setScaleType(ImageView.ScaleType.FIT_CENTER);

    if (iconHeight != -1)
      icon.setMaxHeight(iconHeight);
    if (iconWidth != -1)
      icon.setMaxWidth(iconWidth);

    if (imageRes != -1)
      icon.setImageResource(imageRes);
    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(),
        resId);

    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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