使用第三方框架Glide显示网络图片

转载地址：http://www.cnblogs.com/Tom896766857/p/5876169.html

1:资源:

https://github.com/bumptech/glide](https://github.com/bumptech/glide

2:添加依赖:

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

3:添加权限:

<uses-permission android:name="android.permission.INTERNET"/>

4.布局:

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical"     tools:context="www.itcast.com.testglide.MainActivity">       <Button         android:id="@+id/btn"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Glide" />       <ScrollView         android:layout_width="match_parent"         android:layout_height="wrap_content">           <LinearLayout             android:layout_width="match_parent"             android:layout_height="match_parent"             android:orientation="vertical">               <ImageView                 android:id="@+id/iv1"                 android:layout_width="match_parent"                 android:layout_height="wrap_content" />               <ImageView                 android:id="@+id/iv2"                 android:layout_width="match_parent"                 android:layout_height="wrap_content" />               <ImageView                 android:id="@+id/iv3"                 android:layout_width="match_parent"                 android:layout_height="wrap_content" />         </LinearLayout>     </ScrollView> </LinearLayout>

　　5.显示普通图片

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//显示普通图片            Glide                    .with(this) // 指定Context                    .load(url)// 指定图片的URL                    .placeholder(R.mipmap.ic_launcher)// 指定图片未成功加载前显示的图片                    .error(R.mipmap.ic_launcher)// 指定图片加载失败显示的图片                    .override(300, 300)//指定图片的尺寸                    .fitCenter()//指定图片缩放类型为fitCenter                    .centerCrop()// 指定图片缩放类型为centerCrop                    .skipMemoryCache(true)// 跳过内存缓存                    .diskCacheStrategy(DiskCacheStrategy.NONE)//跳过磁盘缓存                    .diskCacheStrategy(DiskCacheStrategy.SOURCE)//仅仅只缓存原来的全分辨率的图像                    .diskCacheStrategy(DiskCacheStrategy.RESULT)//仅仅缓存最终的图像                    .diskCacheStrategy(DiskCacheStrategy.ALL)//缓存所有版本的图像                    .priority(Priority.HIGH)//指定优先级.Glide 将会用他们作为一个准则，并尽可能的处理这些请求，但是它不能保证所有的图片都会按照所要求的顺序加载。优先级排序:IMMEDIATE > HIGH > NORMAL >　LOW                    .into(iv1);//指定显示图片的ImageView

　　6.显示圆形图片:

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//显示圆形图片              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 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();                  }              }                Glide                      .with(this) // 指定Context                      .load(url)// 指定图片的URL                      .transform(new GlideCircleTransform(this)) // 指定自定义BitmapTransformation                      .into(iv2);//指定显示图片的ImageView

　　7.显示圆角图片:

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//显示圆角图片                class GlideRoundTransform extends BitmapTransformation {                      private 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 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);                    }                }                  Glide                        .with(this) // 指定Context                        .load(url)// 指定图片的URL                        .transform(new GlideRoundTransform(this,30)) // 指定自定义BitmapTransformation                        .into(iv3);//指定显示图片的ImageView

　　8.效果图:

9.demo资源:

http://download.youkuaiyun.com/detail/tom91/9631392