图片下载框架Glide

图片下载框架Glide ：

1.权限（联网权限）

改变图片格式声明：

2.引入依赖 ：com.github.bumptech.glide:glide:3.7.0

代码：

可以当做工具类（旋转动画代码）

public class RotateAnimation implements ViewPropertyAnimation.Animator{
    private int repeatCount;
    private int duration;
    private int startAngle;
    private int endAngle;

    public RotateAnimation(int repeatCount, int endAngle, int startAngle, int duration) {
        this.repeatCount = repeatCount;
        this.endAngle = endAngle;
        this.startAngle = startAngle;
        this.duration = duration;
    }

    @Override
    public void animate(View view) {

        ObjectAnimator animator = ObjectAnimator.ofFloat(view, "rotation", startAngle, endAngle);
        animator.setDuration(duration);
        animator.setRepeatCount(repeatCount);
        animator.setInterpolator(new LinearInterpolator());
        animator.start();
    }
}

可以当做工具类（裁剪成圆形图片代码）

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.setAntiAlias(true);

        paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        float r = size / 2f;
        canvas.drawCircle(r, r, r, paint);

        return result;
    }

    @Override public String getId() {
        return getClass().getName();
    }
}

可以当做工具类（制作成圆角矩形图片代码）

public class GlideRoundTransform extends BitmapTransformation {

    private static float radius = 0f;

    public GlideRoundTransform(Context context) {
        this(context, 4);       // 圆角矩形的半径4            
    }

    public GlideRoundTransform(Context context, int radiusDp) {
        super(context);
        this.radius = Resources.getSystem().getDisplayMetrics().density * radiusDp;
    }

    @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);
    }
}

public class MainActivity extends AppCompatActivity {

    private ImageView iv1;
    private Button iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        iv1 = ((ImageView) findViewById(R.id.iv1));
        iv = ((Button) findViewById(R.id.iv));
        intoData();
    }

    private void intoData() {
        iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               String url="http://img1.imgtn.bdimg.com/it/u=2705169360,4047174077&fm=23&gp=0.jpg";
//                String url = "http://images.17173.com/2014/news/2014/12/15/2014cpb1215gif04.gif";
                Glide.with(getBaseContext())
                        .load(Uri.parse(url))
                        //配置缓存
                        .skipMemoryCache(true)
                        //设置图片加载之前的占位符
                        .placeholder(R.mipmap.ic_launcher)
                        //设置图片加载错误的占位符
                        .error(R.mipmap.error_i)
                        //淡入淡出
                        .crossFade(3000)
                        //显示风格
                        .centerCrop()
                       //动画
                        .animate(new RotateAnimation(ValueAnimator.INFINITE,360,0,5000))
                        //变形
                      .transform(new GlideCircleTransform(getBaseContext()))
//                        .transform(getCricleBitmapTransformation())
//                        .transform(getRoundBitmapTransformation())
                        .into(iv1);
            }

          /*  @NonNull
            private BitmapTransformation getCricleBitmapTransformation() {
                return new BitmapTransformation(getBaseContext()) {
                    @Override
                    protected Bitmap transform(BitmapPool pool, Bitmap source, int outWidth, int outHeight) {
                        //得到正方形的边长
                        int min = Math.min(source.getHeight(), source.getWidth());
                        //在原图上截取正方形图片（将来裁剪该正方形的图片，得到圆形图片）
                        Bitmap squareBitmap = Bitmap.createBitmap(source, 0, 0, min, min);
                        //创造与正方形图片等尺寸的空白图片（目的是基于该空白图片，目的是得到等尺寸的空白画布，目的是在该画布上绘制圆形裁剪区域）
                        Bitmap bitmap = Bitmap.createBitmap(min,min, Bitmap.Config.ARGB_8888);
                        //创建画笔画布
                        Paint paint=new Paint();
                        paint.setAntiAlias(true);
                        Canvas canvas=new Canvas(bitmap);
                        //将正方形图片的内容复制到空白图片并绘制裁剪区域
                        Shader shader = paint.setShader(new BitmapShader(squareBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
                        canvas.drawCircle(min/2,min/2,min/2,paint);
                        // //返回加工后的空白图片
                        return bitmap;
                    }

                    @Override
                    public String getId() {
                        return getClass().getSimpleName();
                    }
                };
            }*/




        });
    }

   /* @NonNull
    private BitmapTransformation getRoundBitmapTransformation() {
        return new BitmapTransformation(getBaseContext()) {
            @Override
            protected Bitmap transform(BitmapPool pool, Bitmap source, int outWidth, int outHeight) {
                if (source == null) return null;

                int radius=30;
                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 "yk";
            }
        };
    }*/

    public void aaa(View view) {

        String url="http://img1.imgtn.bdimg.com/it/u=2705169360,4047174077&fm=23&gp=0.jpg";
//                String url = "http://images.17173.com/2014/news/2014/12/15/2014cpb1215gif04.gif";
        Glide.with(getBaseContext())
                .load(Uri.parse(url))
                //配置缓存
                .skipMemoryCache(true)
                //设置图片加载之前的占位符
                .placeholder(R.mipmap.ic_launcher)
                //设置图片加载错误的占位符
                .error(R.mipmap.error_i)
                //淡入淡出
                .crossFade(3000)
                //显示风格
                .centerCrop()
                //动画
                .animate(new RotateAnimation(ValueAnimator.INFINITE,360,0,5000))
                //变形
//                     .transform(getCricleBitmapTransformation())
                .transform(new GlideRoundTransform(getBaseContext()))
                .into(iv1);
    }
    }

public class Yk implements GlideModule {
    @Override
    public void applyOptions(Context context, GlideBuilder builder) {

        builder.setDecodeFormat(DecodeFormat.PREFER_ARGB_8888);
    }

    @Override
    public void registerComponents(Context context, Glide glide) {

    }
}

布局文件：

<?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="com.example.glide_test.MainActivity">

    <ImageView
        android:id="@+id/iv1"
        android:layout_weight="1"
        android:layout_margin="50dp"
        android:layout_width="match_parent"
        android:layout_height="0dp"
         />

    <Button
        android:id="@+id/iv"
        android:layout_width="match_parent"
        android:text="加工成圆形图片"
        android:layout_margin="10dp"
        android:layout_height="wrap_content" />

    <Button
        android:onClick="aaa"
        android:layout_width="match_parent"
        android:text="加工成圆角图片"
        android:layout_margin="10dp"
        android:layout_height="wrap_content" />

</LinearLayout>

运行效果：