ImageUtil.java

package com.example.verificationcodejavademo.utils;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;
import android.util.LruCache;
import android.util.TypedValue;

/**
 * Date:2020/5/20
 * author:wuyan
 */
public class ImageUtil {
    private LruCache<String, Bitmap> mMemoryCache;
    private int cacheSize;

    /**
     * base64转为bitmap
     *
     * @param base64Data
     * @return
     */
    public static Bitmap base64ToBitmap(String base64Data) {
        byte[] bytes = Base64.decode(base64Data, Base64.DEFAULT);
        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    }

    public static Bitmap getBitmap(Context context, int resId) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        TypedValue value = new TypedValue();
        context.getResources().openRawResource(resId, value);
        options.inTargetDensity = value.density;
        options.inScaled = false;//不缩放
        return BitmapFactory.decodeResource(context.getResources(), resId, options);
    }
}