Android Open Source - FillingEffect Bottom Crop Image

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From Project

Back to project page FillingEffect.

License

The source code is released under:

GNU General Public License

Java Source Code

package it.federico.com.fillingeffect.views;
//ww  w.  j  av  a 2s .co m
import android.content.Context;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.widget.ImageView;

public class BottomCropImage extends ImageView {

  public BottomCropImage(Context context) {
    super(context);
    setup();
  }

  public BottomCropImage(Context context, AttributeSet attrs) {
    super(context, attrs);
    setup();
  }

  public BottomCropImage(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setup();
  }

  private void setup() {
    setScaleType(ScaleType.MATRIX);
  }

  @Override
  protected boolean setFrame(int frameLeft, int frameTop, int frameRight,
      int frameBottom) {
    float frameWidth = frameRight - frameLeft;
    float frameHeight = frameBottom - frameTop;

    float originalImageWidth = (float) getDrawable().getIntrinsicWidth();
    float originalImageHeight = (float) getDrawable().getIntrinsicHeight();

    float usedScaleFactor = 1;

    if ((frameWidth > originalImageWidth)
        || (frameHeight > originalImageHeight)) {
      // If frame is bigger than image
      // => Crop it, keep aspect ratio and position it at the bottom and
      // center horizontally

      float fitHorizontallyScaleFactor = frameWidth / originalImageWidth;
      float fitVerticallyScaleFactor = frameHeight / originalImageHeight;

      usedScaleFactor = Math.max(fitHorizontallyScaleFactor,
          fitVerticallyScaleFactor);
    }

    float newImageWidth = originalImageWidth * usedScaleFactor;
    float newImageHeight = originalImageHeight * usedScaleFactor;

    Matrix matrix = getImageMatrix();
    matrix.setScale(usedScaleFactor, usedScaleFactor, 0, 0); // Replaces the
                                  // old
                                  // matrix
                                  // completly
    matrix.postTranslate((frameWidth - newImageWidth) / 2, frameHeight
        - newImageHeight);
    setImageMatrix(matrix);
    return super.setFrame(frameLeft, frameTop, frameRight, frameBottom);
  }

}

Java Source Code List

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