Android Bitmap Crop cropBitmapToSquare(Bitmap bitmap, int squareLength)

Description

crop Bitmap To Square

Declaration

public static Bitmap cropBitmapToSquare(Bitmap bitmap, int squareLength) 

Method Source Code

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import android.annotation.SuppressLint;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.text.TextUtils;
import android.widget.ImageView;

public class Main{
    /**/*  w  w  w. j  a  v a  2 s .co  m*/
     * bitmap with alpha channel
     */
    public static final String LOG_TAG = "BitmapUtils";
    public static Bitmap cropBitmapToSquare(Bitmap bitmap, int squareLength) {
        if (bitmap != null) {
            int imageSquareLength = Math.min(bitmap.getWidth(),
                    bitmap.getHeight());
            int croppedLength = Math.min(imageSquareLength, squareLength);
            float scale = (float) croppedLength / imageSquareLength;
            Matrix matrix = new Matrix();
            matrix.setScale(scale, scale);
            try {
                Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0,
                        imageSquareLength, imageSquareLength, matrix, true);
                if (SDKVersionUtils.hasHoneycombMR1()) {
                    newBitmap.setHasAlpha(bitmap.hasAlpha());
                }
                return newBitmap;
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }
        return null;
    }
    public static Bitmap cropBitmapToSquare(String bitmapPath,
            int squareLength) {
        Bitmap bitmap = decodeSampledBitmapFromFile(bitmapPath,
                squareLength, squareLength);
        return cropBitmapToSquare(bitmap, squareLength);
    }
    public static Bitmap decodeSampledBitmapFromFile(String filePath,
            int reqWidth, int reqHeight) {
        if (TextUtils.isEmpty(filePath)) {
            return null;
        }

        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        options.inPurgeable = true;
        options.inInputShareable = true;
        BitmapFactory.decodeFile(filePath, options);

        options.inSampleSize = calculateInSampleSize(options, reqWidth,
                reqHeight);

        options.inJustDecodeBounds = false;

        try {
            return BitmapFactory.decodeFile(filePath, options);
        } catch (Throwable e) {
            e.printStackTrace();
        }
        return null;
    }
    public static int calculateInSampleSize(BitmapFactory.Options options,
            int reqWidth, int reqHeight) {

        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if ((reqWidth > 0 && reqHeight > 0)
                && (height > reqHeight || width > reqWidth)) {
            if (width > height) {
                inSampleSize = Math.round((float) height
                        / (float) reqHeight);
            } else {
                inSampleSize = Math.round((float) width / (float) reqWidth);
            }
        }
        return 0 == inSampleSize ? 1 : inSampleSize;
    }
}

Related

1. createCenterCropBitmap(Bitmap srcBitmap, int dstWidth, int dstHeight, boolean tryRecycleSource)
2. crop(Bitmap bitmap, float newWidth, float newHeight)
3. crop(Bitmap bitmap, int x, int y, float newWidth, float newHeight)
4. cropBitmapToSquare(String bitmapPath, int squareLength)
5. getTrimmedBottom(Bitmap img)
6. getTrimmedBottom(Bitmap img, int border)
7. getTrimmedLeft(Bitmap img)