Application.java

package com.fresco.android;
import com.freco.android.config.FrescoConfig;

public class Application extends android.app.Application {
    
    @Override
    public void onCreate() {
      
    }
    
    public static GenericDraweeHierarchy getGenericDraweeHierarchy() {
        return FrescoConfig.initializeGenericDraweeHierarchy(getApplicationContext(), null);
    }
}

ImageDecode.java

package com.fresco.android.util;

import android.net.Uri;

import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.controller.ControllerListener;
import com.facebook.drawee.generic.GenericDraweeHierarchy;
import com.facebook.drawee.generic.RoundingParams;
import com.facebook.drawee.interfaces.DraweeController;
import com.facebook.drawee.view.GenericDraweeView;
import com.facebook.imagepipeline.common.ResizeOptions;
import com.facebook.imagepipeline.image.ImageInfo;
import com.facebook.imagepipeline.request.ImageRequest;
import com.facebook.imagepipeline.request.ImageRequestBuilder;
import com.facebook.imagepipeline.request.Postprocessor;
import com.fresco.android.Application;

/**
 * Created by wlanjie on 15/5/18.
 * 图片加载库的工具类
 */
public final class ImageDecode {
    /**
     * 解析图片
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     */
    public static void decodeImage(final String uri, final GenericDraweeView draweeView) {
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setOldController(draweeView.getController())
                .setImageRequest(request)
                .build();
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }

    /**
     * 解析图片
     * @param draweeView 显示图片的View
     * @param controller 监听事件
     */
    public static void decodeImage(final GenericDraweeView draweeView, final DraweeController controller) {
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }

    /**
     * 解析图片
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     * @param listener 监听事件
     */
    public static void decodeImage(final String uri, final GenericDraweeView draweeView, final ControllerListener<? super ImageInfo> listener) {
        final DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setControllerListener(listener)
                .setUri(Uri.parse(uri))
                .build();
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }

    /**
     * 解析图片并设置图片解析成功后的事件
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     * @param postprocessor 监听事件
     */
    public static void decodeImageWithProcessor(final String uri, final GenericDraweeView draweeView, final Postprocessor postprocessor) {
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .setPostprocessor(postprocessor)
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setOldController(draweeView.getController())
                .setImageRequest(request)
                .build();
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }

    public static void decodeImageWithProcessor(final String uri, final GenericDraweeView draweeView, final float round, final Postprocessor postprocessor) {
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .setPostprocessor(postprocessor)
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder().setOldController(draweeView.getController()).setImageRequest(request).build();
        final GenericDraweeHierarchy mHierarchy = Application.getGenericDraweeHierarchy();
        final RoundingParams mRoundingParams = RoundingParams.fromCornersRadius(round);
        mHierarchy.setRoundingParams(mRoundingParams);
        draweeView.setHierarchy(mHierarchy);
        draweeView.setController(controller);
    }

    /**
     * 解析图片并设置图片的宽和高
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     * @param width 图片的宽
     * @param height 图片的高
     */
    public static void decodeImageWithWidthHeight(final String uri, final GenericDraweeView draweeView, final int width, final int height) {
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .setResizeOptions(new ResizeOptions(width, height))
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setOldController(draweeView.getController())
                .setImageRequest(request)
                .build();
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }

    /**
     * 解析图片并设置图片旋转至和屏幕方向一致
     * @param uri 图片的地址
     * @param draweeView 显示图片的View
     */
    public static void decodeImageWithAutoRotate(final String uri, GenericDraweeView draweeView) {
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .setAutoRotateEnabled(true)
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setOldController(draweeView.getController())
                .setImageRequest(request)
                .build();
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }

    /**
     * 解析图片,设置的是一个正规的圆形
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     */
    public static void decodeRoundImage(final String uri, final GenericDraweeView draweeView) {
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder().setOldController(draweeView.getController()).setImageRequest(request).build();
        final GenericDraweeHierarchy mHierarchy = Application.getGenericDraweeHierarchy();
        final RoundingParams mRoundingParams = RoundingParams.asCircle();
        mHierarchy.setRoundingParams(mRoundingParams);
        draweeView.setHierarchy(mHierarchy);
        draweeView.setController(controller);
    }

    /**
     * 解析图片,可以设置圆角
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     * @param round 圆角
     */
    public static void decodeRoundImage(final String uri, final GenericDraweeView draweeView, final float round) {
        final GenericDraweeHierarchy mHierarchy = Application.getGenericDraweeHierarchy();
        final RoundingParams mRoundingParams = RoundingParams.fromCornersRadius(round);
        mHierarchy.setRoundingParams(mRoundingParams);
        draweeView.setHierarchy(mHierarchy);
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder().setOldController(draweeView.getController()).setImageRequest(request).build();
        draweeView.setController(controller);
    }

    /**
     * 解析图片,可以设置圆角
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     * @param round 圆角
     */
    public static void decodeRoundImage(final String uri, final GenericDraweeView draweeView, float topLeft, float topRight, float bottomRight, float bottomLeft) {
        final GenericDraweeHierarchy mHierarchy = Application.getGenericDraweeHierarchy();
        final RoundingParams mRoundingParams = RoundingParams.fromCornersRadii(topLeft, topRight, bottomLeft, bottomRight);
        mHierarchy.setRoundingParams(mRoundingParams);
        draweeView.setHierarchy(mHierarchy);
        final ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .build();
        final DraweeController controller = Fresco.newDraweeControllerBuilder().setOldController(draweeView.getController()).setImageRequest(request).build();
        draweeView.setController(controller);
    }

    /**
     * 解析Gif图片
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     */
    public static void decodeGifImage(final String uri, final GenericDraweeView draweeView) {
        decodeGifImage(uri, draweeView, null);

    }

    /**
     * 解析Gif图片
     * @param uri 图片地址
     * @param draweeView 显示图片的View
     * @param listener 监听事件
     */
    public static void decodeGifImage(final String uri, final GenericDraweeView draweeView, final ControllerListener<? super ImageInfo> listener) {
        DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setUri(Uri.parse(uri))
                .setControllerListener(listener)
                .build();
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }

    public static void decodeGifAutoPlayImage(final String uri, final GenericDraweeView draweeView) {
        ImageRequest request = ImageRequestBuilder.newBuilderWithSource(Uri.parse(uri))
                .build();
        DraweeController controller = Fresco.newDraweeControllerBuilder()
                .setImageRequest(request)
                .setOldController(draweeView.getController())
                .build();
        draweeView.setHierarchy(Application.getGenericDraweeHierarchy());
        draweeView.setController(controller);
    }
}