Android 开发：glide圆角正确实现方法
鉴于昨天很晚测试了一堆码后
我得出结论Glide4 我玩不转啊 /大哭
不过 测试的好几个百度到的示例 有的方法明显过时 有的性能 啧啧 不敢恭维...
其中比较好用的 有如下两个
直接抄砖吧....
/**
* 圆形
**/
public class GlideCircleTransform extends BitmapTransformation {
private static final String ID = "com.examle.nnp.ah.glide.GlideCircleTransform";
private static final byte[] ID_BYTES = ID.getBytes(CHARSET);
@Override
protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
int size = Math.min(toTransform.getWidth(), toTransform.getHeight());
int x = (toTransform.getWidth() - size) / 2;
int y = (toTransform.getHeight() - size) / 2;
Bitmap square = Bitmap.createBitmap(toTransform, x, y, size, size);
Bitmap circle = pool.get(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(circle);
Paint paint = new Paint();
paint.setShader(new BitmapShader(square, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
paint.setAntiAlias(true);
float r = size / 2f;
canvas.drawCircle(r, r, r, paint);
return circle;
}
@Override
public boolean equals(Object obj) {
return obj instanceof GlideCircleTransform;
}
@Override
public int hashCode() {
return ID.hashCode();
}
@Override
public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {
messageDigest.update(ID_BYTES);
}
}
/**
* 圆角
**/
public class GlideRoundTransform extends BitmapTransformation {
private static final String ID = "com.examle.nnp.ah.glide.GlideRoundTransform";
private static final byte[] ID_BYTES = ID.getBytes(CHARSET);
private int radius;
public GlideRoundTransform(Context context, int radius) {
this.radius = UUi.dp2px(radius);
}
@Override
protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
int width = toTransform.getWidth();
int height = toTransform.getHeight();
Bitmap bitmap = pool.get(width, height, Bitmap.Config.ARGB_8888);
bitmap.setHasAlpha(true);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setShader(new BitmapShader(toTransform, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
canvas.drawRoundRect(new RectF(0, 0, width, height), radius, radius, paint);
return bitmap;
}
@Override
public boolean equals(Object obj) {
if (obj instanceof GlideRoundTransform) {
GlideRoundTransform other = (GlideRoundTransform) obj;
return radius == other.radius;
}
return false;
}
@Override
public int hashCode() {
return Util.hashCode(ID.hashCode(), Util.hashCode(radius));
}
@Override
public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {
messageDigest.update(ID_BYTES);
byte[] radiusData = ByteBuffer.allocate(4).putInt(radius).array();
messageDigest.update(radiusData);
}
}--------------------------------------------------------分 ---- 割 -----线----------------------------------------------------------------
到最后 我查阅官方文档发现....
新版的Glide里面 已经封装了相关的方法
RequestOptions options = new RequestOptions(); //圆角
options.bitmapTransform(new RoundedCorners(1));RequestOptions options = new RequestOptions(); //圆形
options.bitmapTransform(new CircleCrop());哭死.... 不说了 前面又有个坑 我先去踩了....
最后... 用完这个还是没解决您的问题 不妨试试 这个自定义的类
/**
* @作者: yzq
* @创建日期: 2019/8/7 20:25
* @文件作用: 绘制圆角图
**/
public class GlideRoundTransform extends BitmapTransformation {
private static float radius = 0f;
private static int type = 0;
public GlideRoundTransform() {
this(4);
}
public GlideRoundTransform(int dp) {
super();
this.type = 0;
this.radius = Resources.getSystem().getDisplayMetrics().density * dp;
}
/**
* @param dp
* @param type 为1 则只绘制 图片上面两个圆角
*/
public GlideRoundTransform(int dp, int type) {
super();
this.type = type;
this.radius = Resources.getSystem().getDisplayMetrics().density * dp;
}
@Override
protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
//变换的时候裁切
Bitmap bitmap = TransformationUtils.centerCrop(pool, toTransform, outWidth, outHeight);
return roundCrop(pool, bitmap);
}
@Override
public void updateDiskCacheKey(MessageDigest messageDigest) {
}
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);
if (type == 0) {
RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());
canvas.drawRoundRect(rectF, radius, radius, paint);
}
if (type == 1) {
RectF rectRound = new RectF(0f, 100f, source.getWidth(), source.getHeight());
canvas.drawRect(rectRound, paint);
}
return result;
}
}调用
RequestOptions options = new RequestOptions();
options.centerCrop()
.placeholder(R.drawable.c_error) //预加载
.error(R.drawable.c_error) //失败
.priority(Priority.IMMEDIATE) //优先级
.diskCacheStrategy(DiskCacheStrategy.RESOURCE)//设置缓存策略
.transform(new GlideRoundTransform(cornerRadius,type));//设置四角圆角
Glide.with(context).load(url).apply(options).into(imageView);当然 你要想了解更多Glide的使用 可参阅：https://www.cnblogs.com/94xiyang/p/9662042.html
https://blog.csdn.net/huangxiaoguo1/article/details/78543224