(原创)Glide图片加载库的使用(2)

2019-11-09 14:58:32

字体：大中小

来源：转载

供稿：网友

Glide是 Google推荐的图片加载库,它可以支持来自url,Android资源,文件,Uri中的图片加载,同时还支持gif图片的加载,以及各种图片显示前的bitmap处理(例如:圆角图片,圆形图片,高斯模糊,旋转,灰度等等),缓存处理,请求优先级处理,动画处理,缩略图处理,图片大小自定义等等.可谓是非常的强大.

1.添加Glide库

需要在build.gradle中加入依赖,目前最新的版本是3.7.0,Glide库地址

compile 'com.github.bumptech.glide:glide:3.7.0'1

2.加载网络图片

/** * Created by YWH on2017/2/9 */public class TestGlideActivity extends Activity { @Override PRotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); String url = "http://www.QQ745.com/uploads/allimg/141106/1-141106153Q5.png"; ImageView targetView = (ImageView) findViewById(R.id.iv_target); Glide.with(this). load(url). asBitmap(). //强制处理为bitmap into(targetView);//显示到目标View中 }}12345678910111213141516

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3.加载资源图片

public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); int resourceId = R.drawable.test; ImageView targetView = (ImageView) findViewById(R.id.iv_target); Glide.with(this). load(resourceId). asBitmap(). into(targetView); }}1234567891011121314

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4.加载本地文件图片

public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); File file = new File(Environment.getExternalStorageDirectory(), "test.jpg"); ImageView targetView = (ImageView) findViewById(R.id.iv_target); Glide.with(this). load(file). asBitmap(). into(targetView); }}123456789101112131415

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5.从Uri中加载

/** * Created by YWH on2017/2/9. */public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); Uri uri = Uri.parse("android.resource://" + this.getPackageName() + "/" + R.drawable.test); ImageView targetView = (ImageView) findViewById(R.id.iv_target); Glide.with(this). load(uri). asBitmap(). into(targetView); }}12345678910111213141516

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6.加载gif图片

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效果图: 这里写图片描述

7.设置默认图片和加载失败时显示的图片

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8.淡入显示效果

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另外,crossFade还可以接收一个参数来设置淡入显示效果的持续时间,crossFade(int duration); 如果你想直接显示图片,而不是淡入显示图片,则可以通过dontAnimate()方法设置.

9.调整图片像素大小

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10.设置CenterCrop,FitCenter

CenterCrop,FitCenter都是对目标图片进行裁剪,了解过ImageView的ScaleType属性就知道,这2种裁剪方式在ImageView上也是有的,分别对应ImageView的ImageView.ScaleType.CENTER_CROP和mageView.ScaleType.FIT_CENTER的.

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11.缓存策略设置

内存缓存设置,通过skipMemoryCache(boolean)来设置是否需要缓存到内存,默认是会缓存到内存的.

/** * Created by YWH on2017/2/9 */public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); ImageView targetView = (ImageView) findViewById(R.id.iv_target); targetView.setScaleType(ImageView.ScaleType.FIT_CENTER); Glide.with(this). load(R.drawable.test). placeholder(R.drawable.bg_loading).//加载中显示的图片 error(R.drawable.bg_error).//加载失败时显示的图片 crossFade(1000).//淡入淡出,注意:如果设置了这个,则必须要去掉asBitmap override(80,80).//设置最终显示的图片像素为80*80,注意:这个是像素,而不是控件的宽高 centerCrop().//中心裁剪,缩放填充至整个ImageView skipMemoryCache(true).//跳过内存缓存 into(targetView); }}123456789101112131415161718192021

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磁盘缓存,磁盘缓存通过diskCacheStrategy(DiskCacheStrategy)来设置,DiskCacheStrategy一共有4种模式:

DiskCacheStrategy.NONE:什么都不缓存 DiskCacheStrategy.SOURCE:仅缓存原图(全分辨率的图片)DiskCacheStrategy.RESULT:仅缓存最终的图片,即修改了尺寸或者转换后的图片DiskCacheStrategy.ALL:缓存所有版本的图片,默认模式public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); ImageView targetView = (ImageView) findViewById(R.id.iv_target); targetView.setScaleType(ImageView.ScaleType.FIT_CENTER); Glide.with(this). load(R.drawable.test). placeholder(R.drawable.bg_loading).//加载中显示的图片 error(R.drawable.bg_error).//加载失败时显示的图片 crossFade(1000).//淡入淡出,注意:如果设置了这个,则必须要去掉asBitmap override(80, 80).//设置最终显示的图片像素为80*80,注意:这个是像素,而不是控件的宽高 centerCrop().//中心裁剪,缩放填充至整个ImageView skipMemoryCache(true).//跳过内存缓存 diskCacheStrategy(DiskCacheStrategy.RESULT).//保存最终图片 into(targetView); }}1234567891011121314151617181920

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12.缓存设置

在GlideModule 中,我们可以设置磁盘缓存的位置,磁盘缓存的大小和内存缓存的大小,同时还可以设置图片的显示质量.

要是用GlideModule ,需要创建它的实现类,然后在manifests中申明实现类的全类路径:

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GlideModule 的实现类,需要实现applyOptions方法:

/** * 所以你知道要创建一个额外的类去定制 Glide。 * 下一步是要全局的去声明这个类，让 Glide 知道它应该在哪里被加载和使用。 * Glide 会扫描 AndroidManifest.xml 为 Glide module 的 meta 声明。 * 因此，你必须在 AndroidManifest.xml 的 <application> 标签内去声明这个SimpleGlideModule。 * Created by YWH on2017/2/9 */public class SimpleGlideModule implements GlideModule { public static DiskCache cache; @Override public void applyOptions(Context context, GlideBuilder builder) { // 在 Android 中有两个主要的方法对图片进行解码：ARGB8888 和 RGB565。前者为每个像素使用了 4 个字节， // 后者仅为每个像素使用了 2 个字节。ARGB8888 的优势是图像质量更高以及能存储一个 alpha 通道。 // Picasso 使用 ARGB8888，Glide 默认使用低质量的 RGB565。 // 对于 Glide 使用者来说：你使用 Glide module 方法去改变解码规则。 builder.setDecodeFormat(DecodeFormat.PREFER_ARGB_8888); //设置缓存目录 File cacheDir = PathUtils.getDiskCacheDir(context, CacheConfig.IMG_DIR); cache = DiskLruCacheWrapper.get(cacheDir, DiskCache.Factory.DEFAULT_DISK_CACHE_SIZE);// 250 MB builder.setDiskCache(new DiskCache.Factory() { @Override public DiskCache build() { return cache; } }); //设置memory和Bitmap池的大小 MemorySizeCalculator calculator = new MemorySizeCalculator(context); int defaultMemoryCacheSize = calculator.getMemoryCacheSize(); int defaultBitmapPoolSize = calculator.getBitmapPoolSize(); int customMemoryCacheSize = (int) (1.2 * defaultMemoryCacheSize); int customBitmapPoolSize = (int) (1.2 * defaultBitmapPoolSize); builder.setMemoryCache(new LruResourceCache(customMemoryCacheSize)); builder.setBitmapPool(new LruBitmapPool(customBitmapPoolSize)); } @Override public void registerComponents(Context context, Glide glide) { }}12345678910111213141516171819202122232425262728293031323334353637383940414243

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13.设置图片请求的优先级

Glide 可以用 Priority 枚举来设置图片的加载优先级,这样我们就可以针对那些需要显示的图片设置高的优先级了. Priority 有4种级别: Priority.LOW Priority.NORMAL Priority.HIGH Priority.IMMEDIATE 例如:

/** * 高优先级加载 * @param url * @param imageView * @param listener */ public static void loadImageWithHighPriority(Object url,ImageView imageView, final LoaderListener listener) { if (url == null) { if (listener != null) { listener.onError(); } } else { Glide.with(imageView.getContext()). load(url). asBitmap(). priority(Priority.HIGH).//高优先级 dontAnimate(). listener(new RequestListener<Object, Bitmap>() { @Override public boolean onException(Exception e, Object model, Target<Bitmap> target, boolean isFirstResource) { if (null != listener) { listener.onError(); } return false; } @Override public boolean onResourceReady(Bitmap resource, Object model, Target<Bitmap> target, boolean isFromMemoryCache, boolean isFirstResource) { if (null != listener) { listener.onSuccess(); } return false; } }).into(imageView); } }123456789101112131415161718192021222324252627282930313233343536

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14.设置加载缩略图

通过设置缩略图,我们可以在显示目标图片之前先展示一个第分辨率或者其他图片,当全分辨率的目标图片在后台加载完成后, Glide会自动切换显示全像素的目标图片.

设置缩略图有2种方式: 通过thumbnail(float)指定0.0f~1.0f的原始图像大小,例如全像素的大小是500*500,如果设置为thumbnail为0.1f,即目标图片的10%,显示的缩略图大小就是50*50;

public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); ImageView targetView = (ImageView) findViewById(R.id.iv_target); Glide.with(this). load(R.drawable.test). placeholder(R.drawable.bg_loading).//加载中显示的图片 error(R.drawable.bg_error).//加载失败时显示的图片 crossFade(1000).//淡入淡出,注意:如果设置了这个,则必须要去掉asBitmap override(80, 80).//设置最终显示的图片像素为80*80,注意:这个是像素,而不是控件的宽高 centerCrop().//中心裁剪,缩放填充至整个ImageView skipMemoryCache(true).//跳过内存缓存 diskCacheStrategy(DiskCacheStrategy.RESULT).//保存最终图片 thumbnail(0.1f).//10%的原图大小 into(targetView); }}123456789101112131415161718192021

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通过thumbnail(DrawableRequestBuilder)方式来指定缩略图,该缩略图可以使用load的所有方式(网络,文件,uri,资源)加载.

public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); ImageView targetView = (ImageView) findViewById(R.id.iv_target); //缩略图请求 DrawableRequestBuilder<String> thumbnailRequest = Glide .with(this) .load("http://www.qq745.com/uploads/allimg/141106/1-141106153Q5.png"); Glide.with(this). load(R.drawable.test).// placeholder(R.drawable.bg_loading).//加载中显示的图片// error(R.drawable.bg_error).//加载失败时显示的图片// crossFade(1000).//淡入淡出,注意:如果设置了这个,则必须要去掉asBitmap override(80, 80).//设置最终显示的图片像素为80*80,注意:这个是像素,而不是控件的宽高 centerCrop().//中心裁剪,缩放填充至整个ImageView skipMemoryCache(true).//跳过内存缓存 diskCacheStrategy(DiskCacheStrategy.RESULT).//保存最终图片 thumbnail(thumbnailRequest).//设置缩略图 into(targetView); }}12345678910111213141516171819202122232425

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15.Transformations Bitmap

在显示目标图片之前,我们可以对目标图片的Bitmap进行相应的处理,例如::圆角图片,圆形图片,高斯模糊,旋转,灰度等等. 只需要实现Transformation接口即可,该接口的transform方法会返回显示图片前的Bitmap对象,在该方法中对 Bitmap的任何处理,都会影响到最终的显示结果. 当然,如果你只是想要对图片做常规的 bitmap 转换，你可以继承抽象类BitmapTransformation,它简化了Transformation接口的实现，这应该能覆盖大部分的应用场景了。

使用的时候,通过transform(Transformation… transformations)来设置.例如:

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下面贴出常用的几个Bitmap的转换处理的代码,在github上也有glide-transformations-master库.

圆图处理

public class CropCircleTransformation implements Transformation<Bitmap> { private BitmapPool mBitmapPool; public CropCircleTransformation(Context context) { this(Glide.get(context).getBitmapPool()); } public CropCircleTransformation(BitmapPool pool) { this.mBitmapPool = pool; } @Override public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) { Bitmap source = resource.get(); int size = Math.min(source.getWidth(), source.getHeight()); int width = (source.getWidth() - size) / 2; int height = (source.getHeight() - size) / 2; Bitmap bitmap = mBitmapPool.get(size, size, Bitmap.Config.ARGB_8888); if (bitmap == null) { bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888); } Canvas canvas = new Canvas(bitmap); Paint paint = new Paint(); BitmapShader shader = new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP); if (width != 0 || height != 0) { // source isn't square, move viewport to center Matrix matrix = new Matrix(); matrix.setTranslate(-width, -height); shader.setLocalMatrix(matrix); } paint.setShader(shader); paint.setAntiAlias(true); float r = size / 2f; canvas.drawCircle(r, r, r, paint); return BitmapResource.obtain(bitmap, mBitmapPool); } @Override public String getId() { return "CropCircleTransformation()"; }}12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849

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圆角处理

public class RoundedCornersTransformation implements Transformation<Bitmap> { private BitmapPool mBitmapPool; private int radius; private int margin; public RoundedCornersTransformation(Context context, int radius, int margin) { this(Glide.get(context).getBitmapPool(), radius, margin); } public RoundedCornersTransformation(BitmapPool pool, int radius, int margin) { mBitmapPool = pool; this.radius = radius; this.margin = margin; } @Override public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) { Bitmap source = resource.get(); int width = source.getWidth(); int height = source.getHeight(); Bitmap bitmap = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888); if (bitmap == null) { bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); } Canvas canvas = new Canvas(bitmap); Paint paint = new Paint(); paint.setAntiAlias(true); paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP)); canvas.drawRoundRect(new RectF(margin, margin, width - margin, height - margin), radius, radius, paint); return BitmapResource.obtain(bitmap, mBitmapPool); } @Override public String getId() { return "RoundedTransformation(radius=" + radius + ", margin=" + margin + ")"; }}12345678910111213141516171819202122232425262728293031323334353637383940414243

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灰度处理

public class GrayscaleTransformation implements Transformation<Bitmap> { private BitmapPool mBitmapPool; public GrayscaleTransformation(Context context) { this(Glide.get(context).getBitmapPool()); } public GrayscaleTransformation(BitmapPool pool) { mBitmapPool = pool; } @Override public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) { Bitmap source = resource.get(); int width = source.getWidth(); int height = source.getHeight(); Bitmap.Config config = source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888; Bitmap bitmap = mBitmapPool.get(width, height, config); if (bitmap == null) { bitmap = Bitmap.createBitmap(width, height, config); } Canvas canvas = new Canvas(bitmap); ColorMatrix saturation = new ColorMatrix(); saturation.setSaturation(0f); Paint paint = new Paint(); paint.setColorFilter(new ColorMatrixColorFilter(saturation)); canvas.drawBitmap(source, 0, 0, paint); return BitmapResource.obtain(bitmap, mBitmapPool); } @Override public String getId() { return "GrayscaleTransformation()"; }}1234567891011121314151617181920212223242526272829303132333435363738394041

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旋转处理

public class RotateTransformation extends BitmapTransformation { private float rotateRotationAngle = 0f; public RotateTransformation(Context context, float rotateRotationAngle) { super(context); this.rotateRotationAngle = rotateRotationAngle; } @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) { Matrix matrix = new Matrix(); matrix.postRotate(rotateRotationAngle); return Bitmap.createBitmap(toTransform, 0, 0, toTransform.getWidth(), toTransform.getHeight(), matrix, true); } @Override public String getId() { return "rotate" + rotateRotationAngle; }}123456789101112131415161718192021222324

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高斯模糊处理

public class BlurTransformation implements Transformation<Bitmap> { private static int MAX_RADIUS = 25; private static int DEFAULT_DOWN_SAMPLING = 1; private Context mContext; private BitmapPool mBitmapPool; private int mRadius; private int mSampling; public BlurTransformation(Context context) { this(context, Glide.get(context).getBitmapPool(), MAX_RADIUS, DEFAULT_DOWN_SAMPLING); } public BlurTransformation(Context context, BitmapPool pool) { this(context, pool, MAX_RADIUS, DEFAULT_DOWN_SAMPLING); } public BlurTransformation(Context context, BitmapPool pool, int radius) { this(context, pool, radius, DEFAULT_DOWN_SAMPLING); } public BlurTransformation(Context context, int radius) { this(context, Glide.get(context).getBitmapPool(), radius, DEFAULT_DOWN_SAMPLING); } public BlurTransformation(Context context, BitmapPool pool, int radius, int sampling) { mContext = context; mBitmapPool = pool; mRadius = radius; mSampling = sampling; } public BlurTransformation(Context context, int radius, int sampling) { mContext = context; mBitmapPool = Glide.get(context).getBitmapPool(); mRadius = radius; mSampling = sampling; } @Override public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) { Bitmap source = resource.get(); int width = source.getWidth(); int height = source.getHeight(); int scaledWidth = width / mSampling; int scaledHeight = height / mSampling; Bitmap bitmap = mBitmapPool.get(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888); if (bitmap == null) { bitmap = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888); } Canvas canvas = new Canvas(bitmap); canvas.scale(1 / (float) mSampling, 1 / (float) mSampling); Paint paint = new Paint(); paint.setFlags(Paint.FILTER_BITMAP_FLAG); canvas.drawBitmap(source, 0, 0, paint); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) { try { bitmap = RSBlur.blur(mContext, bitmap, mRadius); } catch (RSRuntimeException e) { bitmap = FastBlur.blur(bitmap, mRadius, true); } } else { bitmap = FastBlur.blur(bitmap, mRadius, true); } return BitmapResource.obtain(bitmap, mBitmapPool); } @Override public String getId() { return "BlurTransformation(radius=" + mRadius + ", sampling=" + mSampling + ")"; }}123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778

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网上提供的FastBlur,可兼容低版本的高斯模糊处理

public class FastBlur { public static Bitmap blur(Bitmap sentBitmap, int radius, boolean canReuseInBitmap) { Bitmap bitmap; if (canReuseInBitmap) { bitmap = sentBitmap; } else { bitmap = sentBitmap.copy(sentBitmap.getConfig(), true); } if (radius < 1) { return (null); } int w = bitmap.getWidth(); int h = bitmap.getHeight(); int[] pix = new int[w * h]; bitmap.getPixels(pix, 0, w, 0, 0, w, h); int wm = w - 1; int hm = h - 1; int wh = w * h; int div = radius + radius + 1; int r[] = new int[wh]; int g[] = new int[wh]; int b[] = new int[wh]; int rsum, gsum, bsum, x, y, i, p, yp, yi, yw; int vmin[] = new int[Math.max(w, h)]; int divsum = (div + 1) >> 1; divsum *= divsum; int dv[] = new int[256 * divsum]; for (i = 0; i < 256 * divsum; i++) { dv[i] = (i / divsum); } yw = yi = 0; int[][] stack = new int[div][3]; int stackpointer; int stackstart; int[] sir; int rbs; int r1 = radius + 1; int routsum, goutsum, boutsum; int rinsum, ginsum, binsum; for (y = 0; y < h; y++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; for (i = -radius; i <= radius; i++) { p = pix[yi + Math.min(wm, Math.max(i, 0))]; sir = stack[i + radius]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rbs = r1 - Math.abs(i); rsum += sir[0] * rbs; gsum += sir[1] * rbs; bsum += sir[2] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } } stackpointer = radius; for (x = 0; x < w; x++) { r[yi] = dv[rsum]; g[yi] = dv[gsum]; b[yi] = dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (y == 0) { vmin[x] = Math.min(x + radius + 1, wm); } p = pix[yw + vmin[x]]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[(stackpointer) % div]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi++; } yw += w; } for (x = 0; x < w; x++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; yp = -radius * w; for (i = -radius; i <= radius; i++) { yi = Math.max(0, yp) + x; sir = stack[i + radius]; sir[0] = r[yi]; sir[1] = g[yi]; sir[2] = b[yi]; rbs = r1 - Math.abs(i); rsum += r[yi] * rbs; gsum += g[yi] * rbs; bsum += b[yi] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } if (i < hm) { yp += w; } } yi = x; stackpointer = radius; for (y = 0; y < h; y++) { // Preserve alpha channel: ( 0xff000000 & pix[yi] ) pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (x == 0) { vmin[y] = Math.min(y + r1, hm) * w; } p = x + vmin[y]; sir[0] = r[p]; sir[1] = g[p]; sir[2] = b[p]; rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[stackpointer]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi += w; } } bitmap.setPixels(pix, 0, w, 0, 0, w, h); return (bitmap); }}123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209

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RenderScript处理高斯模糊

android4.3之后可使用,需要在build.gradle中配置:

defaultConfig { //BlurTransformation renderscriptTargetApi 23 renderscriptSupportModeEnabled true}123456

123456public class RSBlur { @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) public static Bitmap blur(Context context, Bitmap blurredBitmap, int radius) throws RSRuntimeException { try { RenderScript rs = RenderScript.create(context); Allocation input = Allocation.createFromBitmap(rs, blurredBitmap, Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); blur.setInput(input); blur.setRadius(radius); blur.forEach(output); output.copyTo(blurredBitmap); rs.destroy(); } catch (RSRuntimeException e) { blurredBitmap = FastBlur.blur(blurredBitmap, radius, true); } return blurredBitmap; }}12345678910111213141516171819202122

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16.动画处理

通过animate()方法可以设置xml文件定义的4种补间动画(alpha、scale、translate、rotate) 例如:

res/anim/left_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:duration="@android:integer/config_mediumAnimTime" android:fromXDelta="-50%p" android:toXDelta="0"/> <alpha android:duration="@android:integer/config_mediumAnimTime" android:fromAlpha="0.0" android:toAlpha="1.0"/></set>123456789101112

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使用方式:

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处理此外,还可以通过animate指定属性动画:

public class TestGlideActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); ImageView targetView = (ImageView) findViewById(R.id.iv_target); ViewPropertyAnimation.Animator animationObject = new ViewPropertyAnimation.Animator() { @Override public void animate(View view) { //设置属性动画 ObjectAnimator moveIn = ObjectAnimator.ofFloat(view, "translationX", -500f, 0f); ObjectAnimator rotate = ObjectAnimator.ofFloat(view, "rotation", 0f, 360f); ObjectAnimator fadeInOut = ObjectAnimator.ofFloat(view, "alpha", 1f, 0f, 1f); ObjectAnimator moveTop = ObjectAnimator.ofFloat(view, "translationY", 0f, -2000, 0f); AnimatorSet animSet = new AnimatorSet(); //先左进,然后旋转伴随淡入效果,最后移动向上 animSet.play(rotate).with(fadeInOut).after(moveIn).before(moveTop); animSet.setDuration(5000); animSet.start(); } }; Glide.with(this). load(R.drawable.test). asBitmap(). animate(animationObject).//加载属性动画 into(targetView); }}1234567891011121314151617181920212223242526272829

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