get Bitmap Crop Center - Android Graphics

Android examples for Graphics:Bitmap Crop

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Description

get Bitmap Crop Center

Demo Code


//package com.java2s;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Paint;

public class Main {
    public static Bitmap getBitmapCropCenter(Bitmap bitmap, int size,
            boolean recycle) {
        if (bitmap == null || bitmap.isRecycled()) {
            return bitmap;
        }/*from  www .ja va 2 s .  co m*/

        int w = bitmap.getWidth();
        int h = bitmap.getHeight();
        int minSide = Math.min(w, h);
        if (w == h && minSide <= size) {
            return bitmap;
        }
        size = Math.min(size, minSide);

        float scale = Math.max((float) size / bitmap.getWidth(),
                (float) size / bitmap.getHeight());
        Bitmap target = Bitmap.createBitmap(size, size, getConfig(bitmap));
        int width = Math.round(scale * bitmap.getWidth());
        int height = Math.round(scale * bitmap.getHeight());
        Canvas canvas = new Canvas(target);
        canvas.translate((size - width) / 2f, (size - height) / 2f);
        canvas.scale(scale, scale);
        Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG
                | Paint.DITHER_FLAG);
        canvas.drawBitmap(bitmap, 0, 0, paint);
        if (recycle) {
            bitmap.recycle();
        }
        return target;
    }

    private static Bitmap.Config getConfig(Bitmap bitmap) {
        Bitmap.Config config = bitmap.getConfig();
        if (config == null) {
            config = Bitmap.Config.ARGB_8888;
        }
        return config;
    }
}

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