最简单图片加载框架Glide基础使用,实测!
Glide,我算是一个接触比较晚的入门者。有人好奇,标题为啥要加实测二字,因为网上有些(da liang)介绍的并不全,倒置我更换图片加载框架的时候遇到了好几个坑,所以。我在此记录下自己实测后的代码用法。
导入:
compile 'com.github.bumptech.glide:glide:3.7.0'
基础用法:
Glide.with(MainActivity.this).load(imageurl).into(imageview);
以上是最基础的用法,然后我列举了网上能搜罗到的可能会用到的属性:
Glide.with(RegisterActivity.this) .load(AppUrl.P_verify)//图片url //.asGif()//指定为gif格式图 .asBitmap()//指定为静态图 .override(300, 300)//指定图片尺寸 //指定图片的转换,比如要圆角或者圆形图片什么的(自行百度,这里只是科普下可以有这个功能GlideRoundTransform为自定义类) //.transform(new GlideRoundTransform(this,3))//圆角 // .transform(newGlideCircleTransform(context))//圆形 .placeholder(R.drawable.ic_load_err)//加载过程占位图 .error(R.drawable.ic_load_err)//错误占位图 .priority(Priority.HIGH)//图片加载优先级 .skipMemoryCache(false)//关闭磁盘缓存 .diskCacheStrategy(DiskCacheStrategy.NONE)//关闭缓存 .signature(new StringSignature(UUID.randomUUID().toString()))//设置随机标签 .into(imagevercode); //imageview对象
拓展用法:用于加载验证码(url不变的情况下点击刷新)
Glide.with(RegisterActivity.this) .load(AppUrl.P_verify)//图片url .skipMemoryCache(true)//是否跳过内存缓存 .diskCacheStrategy(DiskCacheStrategy.NONE)//关闭缓存 .error(R.drawable.ic_load_err)//失败占位图 .into(imagevercode);//imageview对象
拓展用法:用于获取bitmap(注意,使用该方式获取bitmap先要能确定url的图片不是gif图)
SimpleTarget<GlideDrawable> simpleTarget = new SimpleTarget<GlideDrawable>() { @Override public void onResourceReady(GlideDrawable resource, GlideAnimation glideAnimation) { imageView.setImageDrawable(resource); } }; public void loadImage(View view) { String url = "http://xxx.jpg"; Glide.with(this) .load(url) .into(simpleTarget); }
拓展用法图片虚化
需要添加依赖
compile 'jp.wasabeef:glide-transformations:2.0.2'
该包下的其它用法自行百度,这里就不介绍了参考地址:https://github.com/wasabeef/glide-transformations
Glide.with(this) .load(url) .bitmapTransform( new BlurTransformation(getActivity(),40)) .into(imagebg);
磁盘缓存的类型:
DiskCacheStrategy.NONE 不缓存
DiskCacheStrategy.ALL 缓存原始图和处理之后的
DiskCacheStrategy.SOURCE 缓存原始图
DiskCacheStrategy.RESULT 缓存处理之后的
清除缓存
Glide.get(context).clearMemory(); // 须在UI线程中调用 Glide.get(context).clearDiskCache(); //须在子线程中调用
圆形自定义类:
public class GlideCircleTransform extends BitmapTransformation{ public GlideCircleTransform(Context context) { super(context); } @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) { return circleCrop(pool, toTransform); } private static Bitmap circleCrop(BitmapPool pool, Bitmap source) { if (source == null) return null; int size = Math.min(source.getWidth(), source.getHeight()); int x = (source.getWidth() - size) / 2; int y = (source.getHeight() - size) / 2; // TODO this could be acquired from the pool too Bitmap squared = Bitmap.createBitmap(source, x, y, size, size); Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888); if (result == null) { result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888); } Canvas canvas = new Canvas(result); Paint paint = new Paint(); paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP)); paint.setAntiAlias(true); float r = size / 2f; canvas.drawCircle(r, r, r, paint); return result; } @Override public String getId() { return getClass().getName(); } }
圆角自定义类:
public class GlideRoundTransform extends BitmapTransformation{ private static float radius = 0f; public GlideRoundTransform(Context context) { this(context, 4); } public GlideRoundTransform(Context context, int dp) { super(context); this.radius = Resources.getSystem().getDisplayMetrics().density * dp; } @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) { return roundCrop(pool, toTransform); } private static Bitmap roundCrop(BitmapPool pool, Bitmap source) { if (source == null) return null; Bitmap result = pool.get(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888); if (result == null) { result = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888); } Canvas canvas = new Canvas(result); Paint paint = new Paint(); paint.setShader(new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP)); paint.setAntiAlias(true); RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight()); canvas.drawRoundRect(rectF, radius, radius, paint); return result; } @Override public String getId() { return getClass().getName() + Math.round(radius); } }
以上两个类纯属Copy,亲测可用,嘻嘻~~