项目优化： Android中回收图片内存， setImageResource、setBackgroundResource占用内存大

Mars-xq

已于 2022-10-19 15:01:30 修改

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分类专栏：性能优化文章标签： rpc git github

于 2022-10-19 13:46:20 首次发布

本文链接：https://blog.youkuaiyun.com/sinat_31057219/article/details/127406385

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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;
                }
            }
        }
    }
}