Android Open Source - crop Bitmap Util

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License

The source code is released under:

Apache License

Java Source Code

package net.flask.crop;
/* w w w . j  a v a2s  .  c  o m*/
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.Rect;
import android.util.Log;

public class BitmapUtil {
  public static Bitmap copy(Bitmap src) {
    return Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight());
  }

  public static Rect getScaledRect(Rect src, float rate) {
    Rect result = getCloneRect(src);
    result.left *= rate;
    result.top *= rate;
    result.right *= rate;
    result.bottom *= rate;
    return result;
  }

  private static Rect getCloneRect(Rect src) {
    Rect result = new Rect();
    result.left = src.left;
    result.top = src.top;
    result.right = src.right;
    result.bottom = src.bottom;
    return result;
  }

  public static Bitmap crop(Bitmap bitmap, Rect rect, float multiplier) {
    return crop(bitmap, getScaledRect(rect, multiplier));
  }

  public static Bitmap crop(Bitmap b, Rect rect) {
    Bitmap br = null;
    boolean notNull = false;
    try {
      Log.e("BitmapUtil", "rect : " + rect.toShortString());
      Log.e("BitmapUtil", "bitmap : " + b.getWidth() + ", " + b.getHeight());

      int x = Math.max(rect.left, 1);
      int y = Math.max(rect.top, 1);
      int w = Math.max(rect.right - rect.left - 1, 1);
      int h = Math.max(rect.bottom - rect.top - 1, 1);

      Log.e("BitmapUtil", "created bitmap_rect size : x : " + x + " / y : " + y + " / w : " + w + " / h : " + h);
      br = Bitmap.createBitmap(b, x, y, w, h);
      notNull = true;
    } catch (Exception e) {
      Log.e("BitmapUtil", "crop error" + rect.toShortString());
      e.printStackTrace();
      notNull = false;
    } catch (OutOfMemoryError oome) {
      oome.printStackTrace();
      return null;
    } finally {
      if (notNull) b.recycle();
    }
    return br;
  }

  public static Bitmap rotate(Bitmap b, float rotate) {
    if (rotate == 0) {
      return b;
    }
    Matrix m = new Matrix();
    m.postRotate(rotate);
    Bitmap br = null;
    try {
      br = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), m, true);
    } finally {
      b.recycle();
    }
    return br;
  }

  public static Bitmap scale(Bitmap b, int width, int height) {
    Bitmap br = null;
    boolean notNull = false;
    try {
      br = Bitmap.createScaledBitmap(b, width, height, true);
      notNull = true;
    } catch (Exception e) {
      e.printStackTrace();
      notNull = false;
    } finally {
      if (notNull) b.recycle();
    }
    return br;
  }
}

Java Source Code List

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