项目优化 ： Android中回收图片内存， setImageResourcesetBackgroundResource占用内存大

Posted 2022-11-13 Mars-xq

工具类：

import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.widget.ImageView;

public class ImageUtil 
    private static final String TAG = ImageUtil.class.getSimpleName();

    public static void releaseImageViewResource(ImageView imageView) 
        if (imageView != null) 
            Drawable background = imageView.getBackground();
            Drawable drawable = imageView.getDrawable();
            imageView = null;

            if (background instanceof BitmapDrawable) 
                BitmapDrawable bitmapDrawable = (BitmapDrawable) background;
                Bitmap bitmap = bitmapDrawable.getBitmap();
                bitmapDrawable = null;
                if (bitmap != null && !bitmap.isRecycled()) 
                    bitmap.recycle();
                    bitmap = null;
                
            

            if (drawable instanceof BitmapDrawable) 
                BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
                Bitmap bitmap = bitmapDrawable.getBitmap();
                bitmapDrawable = null;
                if (bitmap != null && !bitmap.isRecycled()) 
                    bitmap.recycle();
                    bitmap = null;