rotate Image and return bitmap to store it in a proper rotated format - Android android.graphics

Android examples for android.graphics:Image Operation

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Description

rotate Image and return bitmap to store it in a proper rotated format

Demo Code

import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;

public class Main {

  /**//w w w.ja v a  2  s . co m
   * 
   * rotate image and return bitmap to store it in a proper
   * rotated format
   * 
   * @param data
   *          byte array to convert in bitmap
   * @return properly rotated bitmap object or null
   */
  public static Bitmap rotateImage(byte[] data, Context context) {
    if (data != null) {
      int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
      int screenHeight = context.getResources().getDisplayMetrics().heightPixels;
      Bitmap bm = BitmapFactory.decodeByteArray(data, 0, (data != null) ? data.length : 0);

      if (context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
        // Notice that width and height are reversed
        Bitmap scaled = Bitmap.createScaledBitmap(bm, screenHeight, screenWidth, true);
        int w = scaled.getWidth();
        int h = scaled.getHeight();
        // Setting post rotate to 90
        Matrix mtx = new Matrix();
        mtx.postRotate(90);
        // Rotating Bitmap
        bm = Bitmap.createBitmap(scaled, 0, 0, w, h, mtx, true);
      } else {// LANDSCAPE MODE
              // No need to reverse width and height
        Bitmap scaled = Bitmap.createScaledBitmap(bm, screenWidth, screenHeight, true);
        bm = scaled;
      }
      return bm;
    }
    return null;
  }

}

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