Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import android.graphics.Bitmap;

import android.support.annotation.Nullable;

public class Main {
    @Nullable
    public static Bitmap removeTransparent(@Nullable Bitmap source) {
        if (source == null) {
            return null;
        }

        int minX = source.getWidth();
        int minY = source.getHeight();
        int maxX = -1;
        int maxY = -1;
        for (int y = 0; y < source.getHeight(); y++) {
            for (int x = 0; x < source.getWidth(); x++) {
                int alpha = (source.getPixel(x, y) >> 24) & 255;
                if (alpha > 0) {
                    if (x < minX)
                        minX = x;
                    if (x > maxX)
                        maxX = x;
                    if (y < minY)
                        minY = y;
                    if (y > maxY)
                        maxY = y;
                }
            }
        }

        if ((maxX < minX) || (maxY < minY)) {
            return null; // Bitmap is entirely transparent
        }

        // crop bitmap to non-transparent area and return:
        return Bitmap.createBitmap(source, minX, minY, (maxX - minX) + 1, (maxY - minY) + 1);
    }
}