Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.os.Build;

public class Main {
    public static boolean canUseForInBitmap(Bitmap candidate, BitmapFactory.Options targetOptions) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            // From Android 4.4 (KitKat) onward we can re-use if the byte size of
            // the new bitmap is smaller than the reusable bitmap candidate
            // allocation byte count.
            int width = targetOptions.outWidth / targetOptions.inSampleSize;
            int height = targetOptions.outHeight / targetOptions.inSampleSize;
            int byteCount = width * height * getBytesPerPixel(candidate.getConfig());
            return byteCount <= candidate.getAllocationByteCount();
        }

        // On earlier versions, the dimensions must match exactly and the inSampleSize must be 1
        return candidate.getWidth() == targetOptions.outWidth && candidate.getHeight() == targetOptions.outHeight
                && targetOptions.inSampleSize == 1;
    }

    /**
     * A helper function to return the byte usage per pixel of a bitmap based on its configuration.
     */
    public static int getBytesPerPixel(Config config) {
        switch (config) {
        case ARGB_8888:
            return 4;
        case RGB_565:
        case ARGB_4444:
            return 2;
        case ALPHA_8:
        default:
            return 1;
        }
    }
}